drivers/scsi/megaraid.c

   1 /*
   2  *
   3  *                      Linux MegaRAID device driver
   4  *
   5  * Copyright © 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 : v2.00.3 (Feb 19, 2003) - Atul Mukker <Atul.Mukker@lsil.com>
  21  *
  22  * Description: Linux device driver for LSI Logic MegaRAID controller
  23  *
  24  * Supported controllers: MegaRAID 418, 428, 438, 466, 762, 467, 471, 490, 493
  25  *                                      518, 520, 531, 532
  26  *
  27  * This driver is supported by LSI Logic, with assistance from Red Hat, Dell,
  28  * and others. Please send updates to the mailing list
  29  * linux-scsi@vger.kernel.org .
  30  *
  31  */
  32
  33 #include <linux/mm.h>
  34 #include <linux/fs.h>
  35 #include <linux/blkdev.h>
  36 #include <asm/uaccess.h>
  37 #include <asm/io.h>
  38 #include <linux/delay.h>
  39 #include <linux/proc_fs.h>
  40 #include <linux/reboot.h>
  41 #include <linux/module.h>
  42 #include <linux/list.h>
  43 #include <linux/interrupt.h>
  44 #include <linux/pci.h>
  45 #include <linux/init.h>
  46 #include <scsi/scsicam.h>
  47
  48 #include "scsi.h"
  49 #include <scsi/scsi_host.h>
  50
  51 #include "megaraid.h"
  52
  53 #define MEGARAID_MODULE_VERSION "2.00.3"
  54
  55 MODULE_AUTHOR ("LSI Logic Corporation");
  56 MODULE_DESCRIPTION ("LSI Logic MegaRAID driver");
  57 MODULE_LICENSE ("GPL");
  58 MODULE_VERSION(MEGARAID_MODULE_VERSION);
  59
  60 static unsigned int max_cmd_per_lun = DEF_CMD_PER_LUN;
  61 module_param(max_cmd_per_lun, uint, 0);
  62 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)");
  63
  64 static unsigned short int max_sectors_per_io = MAX_SECTORS_PER_IO;
  65 module_param(max_sectors_per_io, ushort, 0);
  66 MODULE_PARM_DESC(max_sectors_per_io, "Maximum number of sectors per I/O request (default=MAX_SECTORS_PER_IO=128)");
  67
  68
  69 static unsigned short int max_mbox_busy_wait = MBOX_BUSY_WAIT;
  70 module_param(max_mbox_busy_wait, ushort, 0);
  71 MODULE_PARM_DESC(max_mbox_busy_wait, "Maximum wait for mailbox in microseconds if busy (default=MBOX_BUSY_WAIT=10)");
  72
  73 #define RDINDOOR(adapter)               readl((adapter)->base + 0x20)
  74 #define RDOUTDOOR(adapter)              readl((adapter)->base + 0x2C)
  75 #define WRINDOOR(adapter,value)         writel(value, (adapter)->base + 0x20)
  76 #define WROUTDOOR(adapter,value)        writel(value, (adapter)->base + 0x2C)
  77
  78 /*
  79  * Global variables
  80  */
  81
  82 static int hba_count;
  83 static adapter_t *hba_soft_state[MAX_CONTROLLERS];
  84 static struct proc_dir_entry *mega_proc_dir_entry;
  85
  86 /* For controller re-ordering */
  87 static struct mega_hbas mega_hbas[MAX_CONTROLLERS];
  88
  89 /*
  90  * The File Operations structure for the serial/ioctl interface of the driver
  91  */
  92 static struct file_operations megadev_fops = {
  93         .owner          = THIS_MODULE,
  94         .ioctl          = megadev_ioctl,
  95         .open           = megadev_open,
  96 };
  97
  98 /*
  99  * Array to structures for storing the information about the controllers. This
 100  * information is sent to the user level applications, when they do an ioctl
 101  * for this information.
 102  */
 103 static struct mcontroller mcontroller[MAX_CONTROLLERS];
 104
 105 /* The current driver version */
 106 static u32 driver_ver = 0x02000000;
 107
 108 /* major number used by the device for character interface */
 109 static int major;
 110
 111 #define IS_RAID_CH(hba, ch)     (((hba)->mega_ch_class >> (ch)) & 0x01)
 112
 113
 114 /*
 115  * Debug variable to print some diagnostic messages
 116  */
 117 static int trace_level;
 118
 119 /**
 120  * mega_setup_mailbox()
 121  * @adapter - pointer to our soft state
 122  *
 123  * Allocates a 8 byte aligned memory for the handshake mailbox.
 124  */
 125 static int
 126 mega_setup_mailbox(adapter_t *adapter)
 127 {
 128         unsigned long   align;
 129
 130         adapter->una_mbox64 = pci_alloc_consistent(adapter->dev,
 131                         sizeof(mbox64_t), &adapter->una_mbox64_dma);
 132
 133         if( !adapter->una_mbox64 ) return -1;
 134
 135         adapter->mbox = &adapter->una_mbox64->mbox;
 136
 137         adapter->mbox = (mbox_t *)((((unsigned long) adapter->mbox) + 15) &
 138                         (~0UL ^ 0xFUL));
 139
 140         adapter->mbox64 = (mbox64_t *)(((unsigned long)adapter->mbox) - 8);
 141
 142         align = ((void *)adapter->mbox) - ((void *)&adapter->una_mbox64->mbox);
 143
 144         adapter->mbox_dma = adapter->una_mbox64_dma + 8 + align;
 145
 146         /*
 147          * Register the mailbox if the controller is an io-mapped controller
 148          */
 149         if( adapter->flag & BOARD_IOMAP ) {
 150
 151                 outb_p(adapter->mbox_dma & 0xFF,
 152                                 adapter->host->io_port + MBOX_PORT0);
 153
 154                 outb_p((adapter->mbox_dma >> 8) & 0xFF,
 155                                 adapter->host->io_port + MBOX_PORT1);
 156
 157                 outb_p((adapter->mbox_dma >> 16) & 0xFF,
 158                                 adapter->host->io_port + MBOX_PORT2);
 159
 160                 outb_p((adapter->mbox_dma >> 24) & 0xFF,
 161                                 adapter->host->io_port + MBOX_PORT3);
 162
 163                 outb_p(ENABLE_MBOX_BYTE,
 164                                 adapter->host->io_port + ENABLE_MBOX_REGION);
 165
 166                 irq_ack(adapter);
 167
 168                 irq_enable(adapter);
 169         }
 170
 171         return 0;
 172 }
 173
 174
 175 /*
 176  * mega_query_adapter()
 177  * @adapter - pointer to our soft state
 178  *
 179  * Issue the adapter inquiry commands to the controller and find out
 180  * information and parameter about the devices attached
 181  */
 182 static int
 183 mega_query_adapter(adapter_t *adapter)
 184 {
 185         dma_addr_t      prod_info_dma_handle;
 186         mega_inquiry3   *inquiry3;
 187         u8      raw_mbox[sizeof(struct mbox_out)];
 188         mbox_t  *mbox;
 189         int     retval;
 190
 191         /* Initialize adapter inquiry mailbox */
 192
 193         mbox = (mbox_t *)raw_mbox;
 194
 195         memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
 196         memset(&mbox->m_out, 0, sizeof(raw_mbox));
 197
 198         /*
 199          * Try to issue Inquiry3 command
 200          * if not succeeded, then issue MEGA_MBOXCMD_ADAPTERINQ command and
 201          * update enquiry3 structure
 202          */
 203         mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;
 204
 205         inquiry3 = (mega_inquiry3 *)adapter->mega_buffer;
 206
 207         raw_mbox[0] = FC_NEW_CONFIG;            /* i.e. mbox->cmd=0xA1 */
 208         raw_mbox[2] = NC_SUBOP_ENQUIRY3;        /* i.e. 0x0F */
 209         raw_mbox[3] = ENQ3_GET_SOLICITED_FULL;  /* i.e. 0x02 */
 210
 211         /* Issue a blocking command to the card */
 212         if ((retval = issue_scb_block(adapter, raw_mbox))) {
 213                 /* the adapter does not support 40ld */
 214
 215                 mraid_ext_inquiry       *ext_inq;
 216                 mraid_inquiry           *inq;
 217                 dma_addr_t              dma_handle;
 218
 219                 ext_inq = pci_alloc_consistent(adapter->dev,
 220                                 sizeof(mraid_ext_inquiry), &dma_handle);
 221
 222                 if( ext_inq == NULL ) return -1;
 223
 224                 inq = &ext_inq->raid_inq;
 225
 226                 mbox->m_out.xferaddr = (u32)dma_handle;
 227
 228                 /*issue old 0x04 command to adapter */
 229                 mbox->m_out.cmd = MEGA_MBOXCMD_ADPEXTINQ;
 230
 231                 issue_scb_block(adapter, raw_mbox);
 232
 233                 /*
 234                  * update Enquiry3 and ProductInfo structures with
 235                  * mraid_inquiry structure
 236                  */
 237                 mega_8_to_40ld(inq, inquiry3,
 238                                 (mega_product_info *)&adapter->product_info);
 239
 240                 pci_free_consistent(adapter->dev, sizeof(mraid_ext_inquiry),
 241                                 ext_inq, dma_handle);
 242
 243         } else {                /*adapter supports 40ld */
 244                 adapter->flag |= BOARD_40LD;
 245
 246                 /*
 247                  * get product_info, which is static information and will be
 248                  * unchanged
 249                  */
 250                 prod_info_dma_handle = pci_map_single(adapter->dev, (void *)
 251                                 &adapter->product_info,
 252                                 sizeof(mega_product_info), PCI_DMA_FROMDEVICE);
 253
 254                 mbox->m_out.xferaddr = prod_info_dma_handle;
 255
 256                 raw_mbox[0] = FC_NEW_CONFIG;    /* i.e. mbox->cmd=0xA1 */
 257                 raw_mbox[2] = NC_SUBOP_PRODUCT_INFO;    /* i.e. 0x0E */
 258
 259                 if ((retval = issue_scb_block(adapter, raw_mbox)))
 260                         printk(KERN_WARNING
 261                         "megaraid: Product_info cmd failed with error: %d\n",
 262                                 retval);
 263
 264                 pci_unmap_single(adapter->dev, prod_info_dma_handle,
 265                                 sizeof(mega_product_info), PCI_DMA_FROMDEVICE);
 266         }
 267
 268
 269         /*
 270          * kernel scans the channels from 0 to <= max_channel
 271          */
 272         adapter->host->max_channel =
 273                 adapter->product_info.nchannels + NVIRT_CHAN -1;
 274
 275         adapter->host->max_id = 16;     /* max targets per channel */
 276
 277         adapter->host->max_lun = 7;     /* Upto 7 luns for non disk devices */
 278
 279         adapter->host->cmd_per_lun = max_cmd_per_lun;
 280
 281         adapter->numldrv = inquiry3->num_ldrv;
 282
 283         adapter->max_cmds = adapter->product_info.max_commands;
 284
 285         if(adapter->max_cmds > MAX_COMMANDS)
 286                 adapter->max_cmds = MAX_COMMANDS;
 287
 288         adapter->host->can_queue = adapter->max_cmds - 1;
 289
 290         /*
 291          * Get the maximum number of scatter-gather elements supported by this
 292          * firmware
 293          */
 294         mega_get_max_sgl(adapter);
 295
 296         adapter->host->sg_tablesize = adapter->sglen;
 297
 298
 299         /* use HP firmware and bios version encoding */
 300         if (adapter->product_info.subsysvid == HP_SUBSYS_VID) {
 301                 sprintf (adapter->fw_version, "%c%d%d.%d%d",
 302                          adapter->product_info.fw_version[2],
 303                          adapter->product_info.fw_version[1] >> 8,
 304                          adapter->product_info.fw_version[1] & 0x0f,
 305                          adapter->product_info.fw_version[0] >> 8,
 306                          adapter->product_info.fw_version[0] & 0x0f);
 307                 sprintf (adapter->bios_version, "%c%d%d.%d%d",
 308                          adapter->product_info.bios_version[2],
 309                          adapter->product_info.bios_version[1] >> 8,
 310                          adapter->product_info.bios_version[1] & 0x0f,
 311                          adapter->product_info.bios_version[0] >> 8,
 312                          adapter->product_info.bios_version[0] & 0x0f);
 313         } else {
 314                 memcpy(adapter->fw_version,
 315                                 (char *)adapter->product_info.fw_version, 4);
 316                 adapter->fw_version[4] = 0;
 317
 318                 memcpy(adapter->bios_version,
 319                                 (char *)adapter->product_info.bios_version, 4);
 320
 321                 adapter->bios_version[4] = 0;
 322         }
 323
 324         printk(KERN_NOTICE "megaraid: [%s:%s] detected %d logical drives.\n",
 325                 adapter->fw_version, adapter->bios_version, adapter->numldrv);
 326
 327         /*
 328          * Do we support extended (>10 bytes) cdbs
 329          */
 330         adapter->support_ext_cdb = mega_support_ext_cdb(adapter);
 331         if (adapter->support_ext_cdb)
 332                 printk(KERN_NOTICE "megaraid: supports extended CDBs.\n");
 333
 334
 335         return 0;
 336 }
 337
 338 /**
 339  * mega_runpendq()
 340  * @adapter - pointer to our soft state
 341  *
 342  * Runs through the list of pending requests.
 343  */
 344 static inline void
 345 mega_runpendq(adapter_t *adapter)
 346 {
 347         if(!list_empty(&adapter->pending_list))
 348                 __mega_runpendq(adapter);
 349 }
 350
 351 /*
 352  * megaraid_queue()
 353  * @scmd - Issue this scsi command
 354  * @done - the callback hook into the scsi mid-layer
 355  *
 356  * The command queuing entry point for the mid-layer.
 357  */
 358 static int
 359 megaraid_queue(Scsi_Cmnd *scmd, void (*done)(Scsi_Cmnd *))
 360 {
 361         adapter_t       *adapter;
 362         scb_t   *scb;
 363         int     busy=0;
 364
 365         adapter = (adapter_t *)scmd->device->host->hostdata;
 366
 367         scmd->scsi_done = done;
 368
 369
 370         /*
 371          * Allocate and build a SCB request
 372          * busy flag will be set if mega_build_cmd() command could not
 373          * allocate scb. We will return non-zero status in that case.
 374          * NOTE: scb can be null even though certain commands completed
 375          * successfully, e.g., MODE_SENSE and TEST_UNIT_READY, we would
 376          * return 0 in that case.
 377          */
 378
 379         scb = mega_build_cmd(adapter, scmd, &busy);
 380
 381         if(scb) {
 382                 scb->state |= SCB_PENDQ;
 383                 list_add_tail(&scb->list, &adapter->pending_list);
 384
 385                 /*
 386                  * Check if the HBA is in quiescent state, e.g., during a
 387                  * delete logical drive opertion. If it is, don't run
 388                  * the pending_list.
 389                  */
 390                 if(atomic_read(&adapter->quiescent) == 0) {
 391                         mega_runpendq(adapter);
 392                 }
 393                 return 0;
 394         }
 395
 396         return busy;
 397 }
 398
 399 /**
 400  * mega_allocate_scb()
 401  * @adapter - pointer to our soft state
 402  * @cmd - scsi command from the mid-layer
 403  *
 404  * Allocate a SCB structure. This is the central structure for controller
 405  * commands.
 406  */
 407 static inline scb_t *
 408 mega_allocate_scb(adapter_t *adapter, Scsi_Cmnd *cmd)
 409 {
 410         struct list_head *head = &adapter->free_list;
 411         scb_t   *scb;
 412
 413         /* Unlink command from Free List */
 414         if( !list_empty(head) ) {
 415
 416                 scb = list_entry(head->next, scb_t, list);
 417
 418                 list_del_init(head->next);
 419
 420                 scb->state = SCB_ACTIVE;
 421                 scb->cmd = cmd;
 422                 scb->dma_type = MEGA_DMA_TYPE_NONE;
 423
 424                 return scb;
 425         }
 426
 427         return NULL;
 428 }
 429
 430 /**
 431  * mega_get_ldrv_num()
 432  * @adapter - pointer to our soft state
 433  * @cmd - scsi mid layer command
 434  * @channel - channel on the controller
 435  *
 436  * Calculate the logical drive number based on the information in scsi command
 437  * and the channel number.
 438  */
 439 static inline int
 440 mega_get_ldrv_num(adapter_t *adapter, Scsi_Cmnd *cmd, int channel)
 441 {
 442         int             tgt;
 443         int             ldrv_num;
 444
 445         tgt = cmd->device->id;
 446
 447         if ( tgt > adapter->this_id )
 448                 tgt--;  /* we do not get inquires for initiator id */
 449
 450         ldrv_num = (channel * 15) + tgt;
 451
 452
 453         /*
 454          * If we have a logical drive with boot enabled, project it first
 455          */
 456         if( adapter->boot_ldrv_enabled ) {
 457                 if( ldrv_num == 0 ) {
 458                         ldrv_num = adapter->boot_ldrv;
 459                 }
 460                 else {
 461                         if( ldrv_num <= adapter->boot_ldrv ) {
 462                                 ldrv_num--;
 463                         }
 464                 }
 465         }
 466
 467         /*
 468          * If "delete logical drive" feature is enabled on this controller.
 469          * Do only if at least one delete logical drive operation was done.
 470          *
 471          * Also, after logical drive deletion, instead of logical drive number,
 472          * the value returned should be 0x80+logical drive id.
 473          *
 474          * These is valid only for IO commands.
 475          */
 476
 477         if (adapter->support_random_del && adapter->read_ldidmap )
 478                 switch (cmd->cmnd[0]) {
 479                 case READ_6:    /* fall through */
 480                 case WRITE_6:   /* fall through */
 481                 case READ_10:   /* fall through */
 482                 case WRITE_10:
 483                         ldrv_num += 0x80;
 484                 }
 485
 486         return ldrv_num;
 487 }
 488
 489 /**
 490  * mega_build_cmd()
 491  * @adapter - pointer to our soft state
 492  * @cmd - Prepare using this scsi command
 493  * @busy - busy flag if no resources
 494  *
 495  * Prepares a command and scatter gather list for the controller. This routine
 496  * also finds out if the commands is intended for a logical drive or a
 497  * physical device and prepares the controller command accordingly.
 498  *
 499  * We also re-order the logical drives and physical devices based on their
 500  * boot settings.
 501  */
 502 static scb_t *
 503 mega_build_cmd(adapter_t *adapter, Scsi_Cmnd *cmd, int *busy)
 504 {
 505         mega_ext_passthru       *epthru;
 506         mega_passthru   *pthru;
 507         scb_t   *scb;
 508         mbox_t  *mbox;
 509         long    seg;
 510         char    islogical;
 511         int     max_ldrv_num;
 512         int     channel = 0;
 513         int     target = 0;
 514         int     ldrv_num = 0;   /* logical drive number */
 515
 516
 517         /*
 518          * filter the internal and ioctl commands
 519          */
 520         if((cmd->cmnd[0] == MEGA_INTERNAL_CMD)) {
 521                 return cmd->buffer;
 522         }
 523
 524
 525         /*
 526          * We know what channels our logical drives are on - mega_find_card()
 527          */
 528         islogical = adapter->logdrv_chan[cmd->device->channel];
 529
 530         /*
 531          * The theory: If physical drive is chosen for boot, all the physical
 532          * devices are exported before the logical drives, otherwise physical
 533          * devices are pushed after logical drives, in which case - Kernel sees
 534          * the physical devices on virtual channel which is obviously converted
 535          * to actual channel on the HBA.
 536          */
 537         if( adapter->boot_pdrv_enabled ) {
 538                 if( islogical ) {
 539                         /* logical channel */
 540                         channel = cmd->device->channel -
 541                                 adapter->product_info.nchannels;
 542                 }
 543                 else {
 544                         /* this is physical channel */
 545                         channel = cmd->device->channel;
 546                         target = cmd->device->id;
 547
 548                         /*
 549                          * boot from a physical disk, that disk needs to be
 550                          * exposed first IF both the channels are SCSI, then
 551                          * booting from the second channel is not allowed.
 552                          */
 553                         if( target == 0 ) {
 554                                 target = adapter->boot_pdrv_tgt;
 555                         }
 556                         else if( target == adapter->boot_pdrv_tgt ) {
 557                                 target = 0;
 558                         }
 559                 }
 560         }
 561         else {
 562                 if( islogical ) {
 563                         /* this is the logical channel */
 564                         channel = cmd->device->channel;
 565                 }
 566                 else {
 567                         /* physical channel */
 568                         channel = cmd->device->channel - NVIRT_CHAN;
 569                         target = cmd->device->id;
 570                 }
 571         }
 572
 573
 574         if(islogical) {
 575
 576                 /* have just LUN 0 for each target on virtual channels */
 577                 if (cmd->device->lun) {
 578                         cmd->result = (DID_BAD_TARGET << 16);
 579                         cmd->scsi_done(cmd);
 580                         return NULL;
 581                 }
 582
 583                 ldrv_num = mega_get_ldrv_num(adapter, cmd, channel);
 584
 585
 586                 max_ldrv_num = (adapter->flag & BOARD_40LD) ?
 587                         MAX_LOGICAL_DRIVES_40LD : MAX_LOGICAL_DRIVES_8LD;
 588
 589                 /*
 590                  * max_ldrv_num increases by 0x80 if some logical drive was
 591                  * deleted.
 592                  */
 593                 if(adapter->read_ldidmap)
 594                         max_ldrv_num += 0x80;
 595
 596                 if(ldrv_num > max_ldrv_num ) {
 597                         cmd->result = (DID_BAD_TARGET << 16);
 598                         cmd->scsi_done(cmd);
 599                         return NULL;
 600                 }
 601
 602         }
 603         else {
 604                 if( cmd->device->lun > 7) {
 605                         /*
 606                          * Do not support lun >7 for physically accessed
 607                          * devices
 608                          */
 609                         cmd->result = (DID_BAD_TARGET << 16);
 610                         cmd->scsi_done(cmd);
 611                         return NULL;
 612                 }
 613         }
 614
 615         /*
 616          *
 617          * Logical drive commands
 618          *
 619          */
 620         if(islogical) {
 621                 switch (cmd->cmnd[0]) {
 622                 case TEST_UNIT_READY:
 623                         memset(cmd->request_buffer, 0, cmd->request_bufflen);
 624
 625 #if MEGA_HAVE_CLUSTERING
 626                         /*
 627                          * Do we support clustering and is the support enabled
 628                          * If no, return success always
 629                          */
 630                         if( !adapter->has_cluster ) {
 631                                 cmd->result = (DID_OK << 16);
 632                                 cmd->scsi_done(cmd);
 633                                 return NULL;
 634                         }
 635
 636                         if(!(scb = mega_allocate_scb(adapter, cmd))) {
 637                                 *busy = 1;
 638                                 return NULL;
 639                         }
 640
 641                         scb->raw_mbox[0] = MEGA_CLUSTER_CMD;
 642                         scb->raw_mbox[2] = MEGA_RESERVATION_STATUS;
 643                         scb->raw_mbox[3] = ldrv_num;
 644
 645                         scb->dma_direction = PCI_DMA_NONE;
 646
 647                         return scb;
 648 #else
 649                         cmd->result = (DID_OK << 16);
 650                         cmd->scsi_done(cmd);
 651                         return NULL;
 652 #endif
 653
 654                 case MODE_SENSE:
 655                         memset(cmd->request_buffer, 0, cmd->cmnd[4]);
 656                         cmd->result = (DID_OK << 16);
 657                         cmd->scsi_done(cmd);
 658                         return NULL;
 659
 660                 case READ_CAPACITY:
 661                 case INQUIRY:
 662
 663                         if(!(adapter->flag & (1L << cmd->device->channel))) {
 664
 665                                 printk(KERN_NOTICE
 666                                         "scsi%d: scanning scsi channel %d ",
 667                                                 adapter->host->host_no,
 668                                                 cmd->device->channel);
 669                                 printk("for logical drives.\n");
 670
 671                                 adapter->flag |= (1L << cmd->device->channel);
 672                         }
 673
 674                         /* Allocate a SCB and initialize passthru */
 675                         if(!(scb = mega_allocate_scb(adapter, cmd))) {
 676                                 *busy = 1;
 677                                 return NULL;
 678                         }
 679                         pthru = scb->pthru;
 680
 681                         mbox = (mbox_t *)scb->raw_mbox;
 682                         memset(mbox, 0, sizeof(scb->raw_mbox));
 683                         memset(pthru, 0, sizeof(mega_passthru));
 684
 685                         pthru->timeout = 0;
 686                         pthru->ars = 1;
 687                         pthru->reqsenselen = 14;
 688                         pthru->islogical = 1;
 689                         pthru->logdrv = ldrv_num;
 690                         pthru->cdblen = cmd->cmd_len;
 691                         memcpy(pthru->cdb, cmd->cmnd, cmd->cmd_len);
 692
 693                         if( adapter->has_64bit_addr ) {
 694                                 mbox->m_out.cmd = MEGA_MBOXCMD_PASSTHRU64;
 695                         }
 696                         else {
 697                                 mbox->m_out.cmd = MEGA_MBOXCMD_PASSTHRU;
 698                         }
 699
 700                         scb->dma_direction = PCI_DMA_FROMDEVICE;
 701
 702                         pthru->numsgelements = mega_build_sglist(adapter, scb,
 703                                 &pthru->dataxferaddr, &pthru->dataxferlen);
 704
 705                         mbox->m_out.xferaddr = scb->pthru_dma_addr;
 706
 707                         return scb;
 708
 709                 case READ_6:
 710                 case WRITE_6:
 711                 case READ_10:
 712                 case WRITE_10:
 713                 case READ_12:
 714                 case WRITE_12:
 715
 716                         /* Allocate a SCB and initialize mailbox */
 717                         if(!(scb = mega_allocate_scb(adapter, cmd))) {
 718                                 *busy = 1;
 719                                 return NULL;
 720                         }
 721                         mbox = (mbox_t *)scb->raw_mbox;
 722
 723                         memset(mbox, 0, sizeof(scb->raw_mbox));
 724                         mbox->m_out.logdrv = ldrv_num;
 725
 726                         /*
 727                          * A little hack: 2nd bit is zero for all scsi read
 728                          * commands and is set for all scsi write commands
 729                          */
 730                         if( adapter->has_64bit_addr ) {
 731                                 mbox->m_out.cmd = (*cmd->cmnd & 0x02) ?
 732                                         MEGA_MBOXCMD_LWRITE64:
 733                                         MEGA_MBOXCMD_LREAD64 ;
 734                         }
 735                         else {
 736                                 mbox->m_out.cmd = (*cmd->cmnd & 0x02) ?
 737                                         MEGA_MBOXCMD_LWRITE:
 738                                         MEGA_MBOXCMD_LREAD ;
 739                         }
 740
 741                         /*
 742                          * 6-byte READ(0x08) or WRITE(0x0A) cdb
 743                          */
 744                         if( cmd->cmd_len == 6 ) {
 745                                 mbox->m_out.numsectors = (u32) cmd->cmnd[4];
 746                                 mbox->m_out.lba =
 747                                         ((u32)cmd->cmnd[1] << 16) |
 748                                         ((u32)cmd->cmnd[2] << 8) |
 749                                         (u32)cmd->cmnd[3];
 750
 751                                 mbox->m_out.lba &= 0x1FFFFF;
 752
 753 #if MEGA_HAVE_STATS
 754                                 /*
 755                                  * Take modulo 0x80, since the logical drive
 756                                  * number increases by 0x80 when a logical
 757                                  * drive was deleted
 758                                  */
 759                                 if (*cmd->cmnd == READ_6) {
 760                                         adapter->nreads[ldrv_num%0x80]++;
 761                                         adapter->nreadblocks[ldrv_num%0x80] +=
 762                                                 mbox->m_out.numsectors;
 763                                 } else {
 764                                         adapter->nwrites[ldrv_num%0x80]++;
 765                                         adapter->nwriteblocks[ldrv_num%0x80] +=
 766                                                 mbox->m_out.numsectors;
 767                                 }
 768 #endif
 769                         }
 770
 771                         /*
 772                          * 10-byte READ(0x28) or WRITE(0x2A) cdb
 773                          */
 774                         if( cmd->cmd_len == 10 ) {
 775                                 mbox->m_out.numsectors =
 776                                         (u32)cmd->cmnd[8] |
 777                                         ((u32)cmd->cmnd[7] << 8);
 778                                 mbox->m_out.lba =
 779                                         ((u32)cmd->cmnd[2] << 24) |
 780                                         ((u32)cmd->cmnd[3] << 16) |
 781                                         ((u32)cmd->cmnd[4] << 8) |
 782                                         (u32)cmd->cmnd[5];
 783
 784 #if MEGA_HAVE_STATS
 785                                 if (*cmd->cmnd == READ_10) {
 786                                         adapter->nreads[ldrv_num%0x80]++;
 787                                         adapter->nreadblocks[ldrv_num%0x80] +=
 788                                                 mbox->m_out.numsectors;
 789                                 } else {
 790                                         adapter->nwrites[ldrv_num%0x80]++;
 791                                         adapter->nwriteblocks[ldrv_num%0x80] +=
 792                                                 mbox->m_out.numsectors;
 793                                 }
 794 #endif
 795                         }
 796
 797                         /*
 798                          * 12-byte READ(0xA8) or WRITE(0xAA) cdb
 799                          */
 800                         if( cmd->cmd_len == 12 ) {
 801                                 mbox->m_out.lba =
 802                                         ((u32)cmd->cmnd[2] << 24) |
 803                                         ((u32)cmd->cmnd[3] << 16) |
 804                                         ((u32)cmd->cmnd[4] << 8) |
 805                                         (u32)cmd->cmnd[5];
 806
 807                                 mbox->m_out.numsectors =
 808                                         ((u32)cmd->cmnd[6] << 24) |
 809                                         ((u32)cmd->cmnd[7] << 16) |
 810                                         ((u32)cmd->cmnd[8] << 8) |
 811                                         (u32)cmd->cmnd[9];
 812
 813 #if MEGA_HAVE_STATS
 814                                 if (*cmd->cmnd == READ_12) {
 815                                         adapter->nreads[ldrv_num%0x80]++;
 816                                         adapter->nreadblocks[ldrv_num%0x80] +=
 817                                                 mbox->m_out.numsectors;
 818                                 } else {
 819                                         adapter->nwrites[ldrv_num%0x80]++;
 820                                         adapter->nwriteblocks[ldrv_num%0x80] +=
 821                                                 mbox->m_out.numsectors;
 822                                 }
 823 #endif
 824                         }
 825
 826                         /*
 827                          * If it is a read command
 828                          */
 829                         if( (*cmd->cmnd & 0x0F) == 0x08 ) {
 830                                 scb->dma_direction = PCI_DMA_FROMDEVICE;
 831                         }
 832                         else {
 833                                 scb->dma_direction = PCI_DMA_TODEVICE;
 834                         }
 835
 836                         /* Calculate Scatter-Gather info */
 837                         mbox->m_out.numsgelements = mega_build_sglist(adapter, scb,
 838                                         (u32 *)&mbox->m_out.xferaddr, (u32 *)&seg);
 839
 840                         return scb;
 841
 842 #if MEGA_HAVE_CLUSTERING
 843                 case RESERVE:   /* Fall through */
 844                 case RELEASE:
 845
 846                         /*
 847                          * Do we support clustering and is the support enabled
 848                          */
 849                         if( ! adapter->has_cluster ) {
 850
 851                                 cmd->result = (DID_BAD_TARGET << 16);
 852                                 cmd->scsi_done(cmd);
 853                                 return NULL;
 854                         }
 855
 856                         /* Allocate a SCB and initialize mailbox */
 857                         if(!(scb = mega_allocate_scb(adapter, cmd))) {
 858                                 *busy = 1;
 859                                 return NULL;
 860                         }
 861
 862                         scb->raw_mbox[0] = MEGA_CLUSTER_CMD;
 863                         scb->raw_mbox[2] = ( *cmd->cmnd == RESERVE ) ?
 864                                 MEGA_RESERVE_LD : MEGA_RELEASE_LD;
 865
 866                         scb->raw_mbox[3] = ldrv_num;
 867
 868                         scb->dma_direction = PCI_DMA_NONE;
 869
 870                         return scb;
 871 #endif
 872
 873                 default:
 874                         cmd->result = (DID_BAD_TARGET << 16);
 875                         cmd->scsi_done(cmd);
 876                         return NULL;
 877                 }
 878         }
 879
 880         /*
 881          * Passthru drive commands
 882          */
 883         else {
 884                 /* Allocate a SCB and initialize passthru */
 885                 if(!(scb = mega_allocate_scb(adapter, cmd))) {
 886                         *busy = 1;
 887                         return NULL;
 888                 }
 889
 890                 mbox = (mbox_t *)scb->raw_mbox;
 891                 memset(mbox, 0, sizeof(scb->raw_mbox));
 892
 893                 if( adapter->support_ext_cdb ) {
 894
 895                         epthru = mega_prepare_extpassthru(adapter, scb, cmd,
 896                                         channel, target);
 897
 898                         mbox->m_out.cmd = MEGA_MBOXCMD_EXTPTHRU;
 899
 900                         mbox->m_out.xferaddr = scb->epthru_dma_addr;
 901
 902                 }
 903                 else {
 904
 905                         pthru = mega_prepare_passthru(adapter, scb, cmd,
 906                                         channel, target);
 907
 908                         /* Initialize mailbox */
 909                         if( adapter->has_64bit_addr ) {
 910                                 mbox->m_out.cmd = MEGA_MBOXCMD_PASSTHRU64;
 911                         }
 912                         else {
 913                                 mbox->m_out.cmd = MEGA_MBOXCMD_PASSTHRU;
 914                         }
 915
 916                         mbox->m_out.xferaddr = scb->pthru_dma_addr;
 917
 918                 }
 919                 return scb;
 920         }
 921         return NULL;
 922 }
 923
 924
 925 /**
 926  * mega_prepare_passthru()
 927  * @adapter - pointer to our soft state
 928  * @scb - our scsi control block
 929  * @cmd - scsi command from the mid-layer
 930  * @channel - actual channel on the controller
 931  * @target - actual id on the controller.
 932  *
 933  * prepare a command for the scsi physical devices.
 934  */
 935 static mega_passthru *
 936 mega_prepare_passthru(adapter_t *adapter, scb_t *scb, Scsi_Cmnd *cmd,
 937                 int channel, int target)
 938 {
 939         mega_passthru *pthru;
 940
 941         pthru = scb->pthru;
 942         memset(pthru, 0, sizeof (mega_passthru));
 943
 944         /* 0=6sec/1=60sec/2=10min/3=3hrs */
 945         pthru->timeout = 2;
 946
 947         pthru->ars = 1;
 948         pthru->reqsenselen = 14;
 949         pthru->islogical = 0;
 950
 951         pthru->channel = (adapter->flag & BOARD_40LD) ? 0 : channel;
 952
 953         pthru->target = (adapter->flag & BOARD_40LD) ?
 954                 (channel << 4) | target : target;
 955
 956         pthru->cdblen = cmd->cmd_len;
 957         pthru->logdrv = cmd->device->lun;
 958
 959         memcpy(pthru->cdb, cmd->cmnd, cmd->cmd_len);
 960
 961         /* Not sure about the direction */
 962         scb->dma_direction = PCI_DMA_BIDIRECTIONAL;
 963
 964         /* Special Code for Handling READ_CAPA/ INQ using bounce buffers */
 965         switch (cmd->cmnd[0]) {
 966         case INQUIRY:
 967         case READ_CAPACITY:
 968                 if(!(adapter->flag & (1L << cmd->device->channel))) {
 969
 970                         printk(KERN_NOTICE
 971                                 "scsi%d: scanning scsi channel %d [P%d] ",
 972                                         adapter->host->host_no,
 973                                         cmd->device->channel, channel);
 974                         printk("for physical devices.\n");
 975
 976                         adapter->flag |= (1L << cmd->device->channel);
 977                 }
 978                 /* Fall through */
 979         default:
 980                 pthru->numsgelements = mega_build_sglist(adapter, scb,
 981                                 &pthru->dataxferaddr, &pthru->dataxferlen);
 982                 break;
 983         }
 984         return pthru;
 985 }
 986
 987
 988 /**
 989  * mega_prepare_extpassthru()
 990  * @adapter - pointer to our soft state
 991  * @scb - our scsi control block
 992  * @cmd - scsi command from the mid-layer
 993  * @channel - actual channel on the controller
 994  * @target - actual id on the controller.
 995  *
 996  * prepare a command for the scsi physical devices. This rountine prepares
 997  * commands for devices which can take extended CDBs (>10 bytes)
 998  */
 999 static mega_ext_passthru *
1000 mega_prepare_extpassthru(adapter_t *adapter, scb_t *scb, Scsi_Cmnd *cmd,
1001                 int channel, int target)
1002 {
1003         mega_ext_passthru       *epthru;
1004
1005         epthru = scb->epthru;
1006         memset(epthru, 0, sizeof(mega_ext_passthru));
1007
1008         /* 0=6sec/1=60sec/2=10min/3=3hrs */
1009         epthru->timeout = 2;
1010
1011         epthru->ars = 1;
1012         epthru->reqsenselen = 14;
1013         epthru->islogical = 0;
1014
1015         epthru->channel = (adapter->flag & BOARD_40LD) ? 0 : channel;
1016         epthru->target = (adapter->flag & BOARD_40LD) ?
1017                 (channel << 4) | target : target;
1018
1019         epthru->cdblen = cmd->cmd_len;
1020         epthru->logdrv = cmd->device->lun;
1021
1022         memcpy(epthru->cdb, cmd->cmnd, cmd->cmd_len);
1023
1024         /* Not sure about the direction */
1025         scb->dma_direction = PCI_DMA_BIDIRECTIONAL;
1026
1027         switch(cmd->cmnd[0]) {
1028         case INQUIRY:
1029         case READ_CAPACITY:
1030                 if(!(adapter->flag & (1L << cmd->device->channel))) {
1031
1032                         printk(KERN_NOTICE
1033                                 "scsi%d: scanning scsi channel %d [P%d] ",
1034                                         adapter->host->host_no,
1035                                         cmd->device->channel, channel);
1036                         printk("for physical devices.\n");
1037
1038                         adapter->flag |= (1L << cmd->device->channel);
1039                 }
1040                 /* Fall through */
1041         default:
1042                 epthru->numsgelements = mega_build_sglist(adapter, scb,
1043                                 &epthru->dataxferaddr, &epthru->dataxferlen);
1044                 break;
1045         }
1046
1047         return epthru;
1048 }
1049
1050 static void
1051 __mega_runpendq(adapter_t *adapter)
1052 {
1053         scb_t *scb;
1054         struct list_head *pos, *next;
1055
1056         /* Issue any pending commands to the card */
1057         list_for_each_safe(pos, next, &adapter->pending_list) {
1058
1059                 scb = list_entry(pos, scb_t, list);
1060
1061                 if( !(scb->state & SCB_ISSUED) ) {
1062
1063                         if( issue_scb(adapter, scb) != 0 )
1064                                 return;
1065                 }
1066         }
1067
1068         return;
1069 }
1070
1071
1072 /**
1073  * issue_scb()
1074  * @adapter - pointer to our soft state
1075  * @scb - scsi control block
1076  *
1077  * Post a command to the card if the mailbox is available, otherwise return
1078  * busy. We also take the scb from the pending list if the mailbox is
1079  * available.
1080  */
1081 static int
1082 issue_scb(adapter_t *adapter, scb_t *scb)
1083 {
1084         volatile mbox64_t       *mbox64 = adapter->mbox64;
1085         volatile mbox_t         *mbox = adapter->mbox;
1086         unsigned int    i = 0;
1087
1088         if(unlikely(mbox->m_in.busy)) {
1089                 do {
1090                         udelay(1);
1091                         i++;
1092                 } while( mbox->m_in.busy && (i < max_mbox_busy_wait) );
1093
1094                 if(mbox->m_in.busy) return -1;
1095         }
1096
1097         /* Copy mailbox data into host structure */
1098         memcpy((char *)&mbox->m_out, (char *)scb->raw_mbox,
1099                         sizeof(struct mbox_out));
1100
1101         mbox->m_out.cmdid = scb->idx;   /* Set cmdid */
1102         mbox->m_in.busy = 1;            /* Set busy */
1103
1104
1105         /*
1106          * Increment the pending queue counter
1107          */
1108         atomic_inc(&adapter->pend_cmds);
1109
1110         switch (mbox->m_out.cmd) {
1111         case MEGA_MBOXCMD_LREAD64:
1112         case MEGA_MBOXCMD_LWRITE64:
1113         case MEGA_MBOXCMD_PASSTHRU64:
1114         case MEGA_MBOXCMD_EXTPTHRU:
1115                 mbox64->xfer_segment_lo = mbox->m_out.xferaddr;
1116                 mbox64->xfer_segment_hi = 0;
1117                 mbox->m_out.xferaddr = 0xFFFFFFFF;
1118                 break;
1119         default:
1120                 mbox64->xfer_segment_lo = 0;
1121                 mbox64->xfer_segment_hi = 0;
1122         }
1123
1124         /*
1125          * post the command
1126          */
1127         scb->state |= SCB_ISSUED;
1128
1129         if( likely(adapter->flag & BOARD_MEMMAP) ) {
1130                 mbox->m_in.poll = 0;
1131                 mbox->m_in.ack = 0;
1132                 WRINDOOR(adapter, adapter->mbox_dma | 0x1);
1133         }
1134         else {
1135                 irq_enable(adapter);
1136                 issue_command(adapter);
1137         }
1138
1139         return 0;
1140 }
1141
1142 /*
1143  * Wait until the controller's mailbox is available
1144  */
1145 static inline int
1146 mega_busywait_mbox (adapter_t *adapter)
1147 {
1148         if (adapter->mbox->m_in.busy)
1149                 return __mega_busywait_mbox(adapter);
1150         return 0;
1151 }
1152
1153 /**
1154  * issue_scb_block()
1155  * @adapter - pointer to our soft state
1156  * @raw_mbox - the mailbox
1157  *
1158  * Issue a scb in synchronous and non-interrupt mode
1159  */
1160 static int
1161 issue_scb_block(adapter_t *adapter, u_char *raw_mbox)
1162 {
1163         volatile mbox64_t *mbox64 = adapter->mbox64;
1164         volatile mbox_t *mbox = adapter->mbox;
1165         u8      byte;
1166
1167         /* Wait until mailbox is free */
1168         if(mega_busywait_mbox (adapter))
1169                 goto bug_blocked_mailbox;
1170
1171         /* Copy mailbox data into host structure */
1172         memcpy((char *) mbox, raw_mbox, sizeof(struct mbox_out));
1173         mbox->m_out.cmdid = 0xFE;
1174         mbox->m_in.busy = 1;
1175
1176         switch (raw_mbox[0]) {
1177         case MEGA_MBOXCMD_LREAD64:
1178         case MEGA_MBOXCMD_LWRITE64:
1179         case MEGA_MBOXCMD_PASSTHRU64:
1180         case MEGA_MBOXCMD_EXTPTHRU:
1181                 mbox64->xfer_segment_lo = mbox->m_out.xferaddr;
1182                 mbox64->xfer_segment_hi = 0;
1183                 mbox->m_out.xferaddr = 0xFFFFFFFF;
1184                 break;
1185         default:
1186                 mbox64->xfer_segment_lo = 0;
1187                 mbox64->xfer_segment_hi = 0;
1188         }
1189
1190         if( likely(adapter->flag & BOARD_MEMMAP) ) {
1191                 mbox->m_in.poll = 0;
1192                 mbox->m_in.ack = 0;
1193                 mbox->m_in.numstatus = 0xFF;
1194                 mbox->m_in.status = 0xFF;
1195                 WRINDOOR(adapter, adapter->mbox_dma | 0x1);
1196
1197                 while((volatile u8)mbox->m_in.numstatus == 0xFF)
1198                         cpu_relax();
1199
1200                 mbox->m_in.numstatus = 0xFF;
1201
1202                 while( (volatile u8)mbox->m_in.poll != 0x77 )
1203                         cpu_relax();
1204
1205                 mbox->m_in.poll = 0;
1206                 mbox->m_in.ack = 0x77;
1207
1208                 WRINDOOR(adapter, adapter->mbox_dma | 0x2);
1209
1210                 while(RDINDOOR(adapter) & 0x2)
1211                         cpu_relax();
1212         }
1213         else {
1214                 irq_disable(adapter);
1215                 issue_command(adapter);
1216
1217                 while (!((byte = irq_state(adapter)) & INTR_VALID))
1218                         cpu_relax();
1219
1220                 set_irq_state(adapter, byte);
1221                 irq_enable(adapter);
1222                 irq_ack(adapter);
1223         }
1224
1225         return mbox->m_in.status;
1226
1227 bug_blocked_mailbox:
1228         printk(KERN_WARNING "megaraid: Blocked mailbox......!!\n");
1229         udelay (1000);
1230         return -1;
1231 }
1232
1233
1234 /**
1235  * megaraid_isr_iomapped()
1236  * @irq - irq
1237  * @devp - pointer to our soft state
1238  * @regs - unused
1239  *
1240  * Interrupt service routine for io-mapped controllers.
1241  * Find out if our device is interrupting. If yes, acknowledge the interrupt
1242  * and service the completed commands.
1243  */
1244 static irqreturn_t
1245 megaraid_isr_iomapped(int irq, void *devp, struct pt_regs *regs)
1246 {
1247         adapter_t       *adapter = devp;
1248         unsigned long   flags;
1249         u8      status;
1250         u8      nstatus;
1251         u8      completed[MAX_FIRMWARE_STATUS];
1252         u8      byte;
1253         int     handled = 0;
1254
1255
1256         /*
1257          * loop till F/W has more commands for us to complete.
1258          */
1259         spin_lock_irqsave(&adapter->lock, flags);
1260
1261         do {
1262                 /* Check if a valid interrupt is pending */
1263                 byte = irq_state(adapter);
1264                 if( (byte & VALID_INTR_BYTE) == 0 ) {
1265                         /*
1266                          * No more pending commands
1267                          */
1268                         goto out_unlock;
1269                 }
1270                 set_irq_state(adapter, byte);
1271
1272                 while((nstatus = (volatile u8)adapter->mbox->m_in.numstatus)
1273                                 == 0xFF)
1274                         cpu_relax();
1275                 adapter->mbox->m_in.numstatus = 0xFF;
1276
1277                 status = adapter->mbox->m_in.status;
1278
1279                 /*
1280                  * decrement the pending queue counter
1281                  */
1282                 atomic_sub(nstatus, &adapter->pend_cmds);
1283
1284                 memcpy(completed, (void *)adapter->mbox->m_in.completed,
1285                                 nstatus);
1286
1287                 /* Acknowledge interrupt */
1288                 irq_ack(adapter);
1289
1290                 mega_cmd_done(adapter, completed, nstatus, status);
1291
1292                 mega_rundoneq(adapter);
1293
1294                 handled = 1;
1295
1296                 /* Loop through any pending requests */
1297                 if(atomic_read(&adapter->quiescent) == 0) {
1298                         mega_runpendq(adapter);
1299                 }
1300
1301         } while(1);
1302
1303  out_unlock:
1304
1305         spin_unlock_irqrestore(&adapter->lock, flags);
1306
1307         return IRQ_RETVAL(handled);
1308 }
1309
1310
1311 /**
1312  * megaraid_isr_memmapped()
1313  * @irq - irq
1314  * @devp - pointer to our soft state
1315  * @regs - unused
1316  *
1317  * Interrupt service routine for memory-mapped controllers.
1318  * Find out if our device is interrupting. If yes, acknowledge the interrupt
1319  * and service the completed commands.
1320  */
1321 static irqreturn_t
1322 megaraid_isr_memmapped(int irq, void *devp, struct pt_regs *regs)
1323 {
1324         adapter_t       *adapter = devp;
1325         unsigned long   flags;
1326         u8      status;
1327         u32     dword = 0;
1328         u8      nstatus;
1329         u8      completed[MAX_FIRMWARE_STATUS];
1330         int     handled = 0;
1331
1332
1333         /*
1334          * loop till F/W has more commands for us to complete.
1335          */
1336         spin_lock_irqsave(&adapter->lock, flags);
1337
1338         do {
1339                 /* Check if a valid interrupt is pending */
1340                 dword = RDOUTDOOR(adapter);
1341                 if(dword != 0x10001234) {
1342                         /*
1343                          * No more pending commands
1344                          */
1345                         goto out_unlock;
1346                 }
1347                 WROUTDOOR(adapter, 0x10001234);
1348
1349                 while((nstatus = (volatile u8)adapter->mbox->m_in.numstatus)
1350                                 == 0xFF) {
1351                         cpu_relax();
1352                 }
1353                 adapter->mbox->m_in.numstatus = 0xFF;
1354
1355                 status = adapter->mbox->m_in.status;
1356
1357                 /*
1358                  * decrement the pending queue counter
1359                  */
1360                 atomic_sub(nstatus, &adapter->pend_cmds);
1361
1362                 memcpy(completed, (void *)adapter->mbox->m_in.completed,
1363                                 nstatus);
1364
1365                 /* Acknowledge interrupt */
1366                 WRINDOOR(adapter, 0x2);
1367
1368                 handled = 1;
1369
1370                 while( RDINDOOR(adapter) & 0x02 ) cpu_relax();
1371
1372                 mega_cmd_done(adapter, completed, nstatus, status);
1373
1374                 mega_rundoneq(adapter);
1375
1376                 /* Loop through any pending requests */
1377                 if(atomic_read(&adapter->quiescent) == 0) {
1378                         mega_runpendq(adapter);
1379                 }
1380
1381         } while(1);
1382
1383  out_unlock:
1384
1385         spin_unlock_irqrestore(&adapter->lock, flags);
1386
1387         return IRQ_RETVAL(handled);
1388 }
1389 /**
1390  * mega_cmd_done()
1391  * @adapter - pointer to our soft state
1392  * @completed - array of ids of completed commands
1393  * @nstatus - number of completed commands
1394  * @status - status of the last command completed
1395  *
1396  * Complete the comamnds and call the scsi mid-layer callback hooks.
1397  */
1398 static void
1399 mega_cmd_done(adapter_t *adapter, u8 completed[], int nstatus, int status)
1400 {
1401         mega_ext_passthru       *epthru = NULL;
1402         struct scatterlist      *sgl;
1403         Scsi_Cmnd       *cmd = NULL;
1404         mega_passthru   *pthru = NULL;
1405         mbox_t  *mbox = NULL;
1406         u8      c;
1407         scb_t   *scb;
1408         int     islogical;
1409         int     cmdid;
1410         int     i;
1411
1412         /*
1413          * for all the commands completed, call the mid-layer callback routine
1414          * and free the scb.
1415          */
1416         for( i = 0; i < nstatus; i++ ) {
1417
1418                 cmdid = completed[i];
1419
1420                 if( cmdid == CMDID_INT_CMDS ) { /* internal command */
1421                         scb = &adapter->int_scb;
1422                         cmd = scb->cmd;
1423                         mbox = (mbox_t *)scb->raw_mbox;
1424
1425                         /*
1426                          * Internal command interface do not fire the extended
1427                          * passthru or 64-bit passthru
1428                          */
1429                         pthru = scb->pthru;
1430
1431                 }
1432                 else {
1433                         scb = &adapter->scb_list[cmdid];
1434
1435                         /*
1436                          * Make sure f/w has completed a valid command
1437                          */
1438                         if( !(scb->state & SCB_ISSUED) || scb->cmd == NULL ) {
1439                                 printk(KERN_CRIT
1440                                         "megaraid: invalid command ");
1441                                 printk("Id %d, scb->state:%x, scsi cmd:%p\n",
1442                                         cmdid, scb->state, scb->cmd);
1443
1444                                 continue;
1445                         }
1446
1447                         /*
1448                          * Was a abort issued for this command
1449                          */
1450                         if( scb->state & SCB_ABORT ) {
1451
1452                                 printk(KERN_WARNING
1453                                 "megaraid: aborted cmd %lx[%x] complete.\n",
1454                                         scb->cmd->serial_number, scb->idx);
1455
1456                                 scb->cmd->result = (DID_ABORT << 16);
1457
1458                                 list_add_tail(SCSI_LIST(scb->cmd),
1459                                                 &adapter->completed_list);
1460
1461                                 mega_free_scb(adapter, scb);
1462
1463                                 continue;
1464                         }
1465
1466                         /*
1467                          * Was a reset issued for this command
1468                          */
1469                         if( scb->state & SCB_RESET ) {
1470
1471                                 printk(KERN_WARNING
1472                                 "megaraid: reset cmd %lx[%x] complete.\n",
1473                                         scb->cmd->serial_number, scb->idx);
1474
1475                                 scb->cmd->result = (DID_RESET << 16);
1476
1477                                 list_add_tail(SCSI_LIST(scb->cmd),
1478                                                 &adapter->completed_list);
1479
1480                                 mega_free_scb (adapter, scb);
1481
1482                                 continue;
1483                         }
1484
1485                         cmd = scb->cmd;
1486                         pthru = scb->pthru;
1487                         epthru = scb->epthru;
1488                         mbox = (mbox_t *)scb->raw_mbox;
1489
1490 #if MEGA_HAVE_STATS
1491                         {
1492
1493                         int     logdrv = mbox->m_out.logdrv;
1494
1495                         islogical = adapter->logdrv_chan[cmd->channel];
1496                         /*
1497                          * Maintain an error counter for the logical drive.
1498                          * Some application like SNMP agent need such
1499                          * statistics
1500                          */
1501                         if( status && islogical && (cmd->cmnd[0] == READ_6 ||
1502                                                 cmd->cmnd[0] == READ_10 ||
1503                                                 cmd->cmnd[0] == READ_12)) {
1504                                 /*
1505                                  * Logical drive number increases by 0x80 when
1506                                  * a logical drive is deleted
1507                                  */
1508                                 adapter->rd_errors[logdrv%0x80]++;
1509                         }
1510
1511                         if( status && islogical && (cmd->cmnd[0] == WRITE_6 ||
1512                                                 cmd->cmnd[0] == WRITE_10 ||
1513                                                 cmd->cmnd[0] == WRITE_12)) {
1514                                 /*
1515                                  * Logical drive number increases by 0x80 when
1516                                  * a logical drive is deleted
1517                                  */
1518                                 adapter->wr_errors[logdrv%0x80]++;
1519                         }
1520
1521                         }
1522 #endif
1523                 }
1524
1525                 /*
1526                  * Do not return the presence of hard disk on the channel so,
1527                  * inquiry sent, and returned data==hard disk or removable
1528                  * hard disk and not logical, request should return failure! -
1529                  * PJ
1530                  */
1531                 islogical = adapter->logdrv_chan[cmd->device->channel];
1532                 if( cmd->cmnd[0] == INQUIRY && !islogical ) {
1533
1534                         if( cmd->use_sg ) {
1535                                 sgl = (struct scatterlist *)
1536                                         cmd->request_buffer;
1537
1538                                 if( sgl->page ) {
1539                                         c = *(unsigned char *)
1540                                         page_address((&sgl[0])->page) +
1541                                         (&sgl[0])->offset;
1542                                 }
1543                                 else {
1544                                         printk(KERN_WARNING
1545                                                 "megaraid: invalid sg.\n");
1546                                         c = 0;
1547                                 }
1548                         }
1549                         else {
1550                                 c = *(u8 *)cmd->request_buffer;
1551                         }
1552
1553                         if(IS_RAID_CH(adapter, cmd->device->channel) &&
1554                                         ((c & 0x1F ) == TYPE_DISK)) {
1555                                 status = 0xF0;
1556                         }
1557                 }
1558
1559                 /* clear result; otherwise, success returns corrupt value */
1560                 cmd->result = 0;
1561
1562                 /* Convert MegaRAID status to Linux error code */
1563                 switch (status) {
1564                 case 0x00:      /* SUCCESS , i.e. SCSI_STATUS_GOOD */
1565                         cmd->result |= (DID_OK << 16);
1566                         break;
1567
1568                 case 0x02:      /* ERROR_ABORTED, i.e.
1569                                    SCSI_STATUS_CHECK_CONDITION */
1570
1571                         /* set sense_buffer and result fields */
1572                         if( mbox->m_out.cmd == MEGA_MBOXCMD_PASSTHRU ||
1573                                 mbox->m_out.cmd == MEGA_MBOXCMD_PASSTHRU64 ) {
1574
1575                                 memcpy(cmd->sense_buffer, pthru->reqsensearea,
1576                                                 14);
1577
1578                                 cmd->result = (DRIVER_SENSE << 24) |
1579                                         (DID_OK << 16) |
1580                                         (CHECK_CONDITION << 1);
1581                         }
1582                         else {
1583                                 if (mbox->m_out.cmd == MEGA_MBOXCMD_EXTPTHRU) {
1584
1585                                         memcpy(cmd->sense_buffer,
1586                                                 epthru->reqsensearea, 14);
1587
1588                                         cmd->result = (DRIVER_SENSE << 24) |
1589                                                 (DID_OK << 16) |
1590                                                 (CHECK_CONDITION << 1);
1591                                 } else {
1592                                         cmd->sense_buffer[0] = 0x70;
1593                                         cmd->sense_buffer[2] = ABORTED_COMMAND;
1594                                         cmd->result |= (CHECK_CONDITION << 1);
1595                                 }
1596                         }
1597                         break;
1598
1599                 case 0x08:      /* ERR_DEST_DRIVE_FAILED, i.e.
1600                                    SCSI_STATUS_BUSY */
1601                         cmd->result |= (DID_BUS_BUSY << 16) | status;
1602                         break;
1603
1604                 default:
1605 #if MEGA_HAVE_CLUSTERING
1606                         /*
1607                          * If TEST_UNIT_READY fails, we know
1608                          * MEGA_RESERVATION_STATUS failed
1609                          */
1610                         if( cmd->cmnd[0] == TEST_UNIT_READY ) {
1611                                 cmd->result |= (DID_ERROR << 16) |
1612                                         (RESERVATION_CONFLICT << 1);
1613                         }
1614                         else
1615                         /*
1616                          * Error code returned is 1 if Reserve or Release
1617                          * failed or the input parameter is invalid
1618                          */
1619                         if( status == 1 &&
1620                                 (cmd->cmnd[0] == RESERVE ||
1621                                          cmd->cmnd[0] == RELEASE) ) {
1622
1623                                 cmd->result |= (DID_ERROR << 16) |
1624                                         (RESERVATION_CONFLICT << 1);
1625                         }
1626                         else
1627 #endif
1628                                 cmd->result |= (DID_BAD_TARGET << 16)|status;
1629                 }
1630
1631                 /*
1632                  * Only free SCBs for the commands coming down from the
1633                  * mid-layer, not for which were issued internally
1634                  *
1635                  * For internal command, restore the status returned by the
1636                  * firmware so that user can interpret it.
1637                  */
1638                 if( cmdid == CMDID_INT_CMDS ) { /* internal command */
1639                         cmd->result = status;
1640
1641                         /*
1642                          * Remove the internal command from the pending list
1643                          */
1644                         list_del_init(&scb->list);
1645                         scb->state = SCB_FREE;
1646                 }
1647                 else {
1648                         mega_free_scb(adapter, scb);
1649                 }
1650
1651                 /* Add Scsi_Command to end of completed queue */
1652                 list_add_tail(SCSI_LIST(cmd), &adapter->completed_list);
1653         }
1654 }
1655
1656
1657 /*
1658  * mega_runpendq()
1659  *
1660  * Run through the list of completed requests and finish it
1661  */
1662 static void
1663 mega_rundoneq (adapter_t *adapter)
1664 {
1665         Scsi_Cmnd *cmd;
1666         struct list_head *pos;
1667
1668         list_for_each(pos, &adapter->completed_list) {
1669
1670                 Scsi_Pointer* spos = (Scsi_Pointer *)pos;
1671
1672                 cmd = list_entry(spos, Scsi_Cmnd, SCp);
1673                 cmd->scsi_done(cmd);
1674         }
1675
1676         INIT_LIST_HEAD(&adapter->completed_list);
1677 }
1678
1679
1680 /*
1681  * Free a SCB structure
1682  * Note: We assume the scsi commands associated with this scb is not free yet.
1683  */
1684 static void
1685 mega_free_scb(adapter_t *adapter, scb_t *scb)
1686 {
1687         switch( scb->dma_type ) {
1688
1689         case MEGA_DMA_TYPE_NONE:
1690                 break;
1691
1692         case MEGA_BULK_DATA:
1693                 pci_unmap_page(adapter->dev, scb->dma_h_bulkdata,
1694                         scb->cmd->request_bufflen, scb->dma_direction);
1695                 break;
1696
1697         case MEGA_SGLIST:
1698                 pci_unmap_sg(adapter->dev, scb->cmd->request_buffer,
1699                         scb->cmd->use_sg, scb->dma_direction);
1700                 break;
1701
1702         default:
1703                 break;
1704         }
1705
1706         /*
1707          * Remove from the pending list
1708          */
1709         list_del_init(&scb->list);
1710
1711         /* Link the scb back into free list */
1712         scb->state = SCB_FREE;
1713         scb->cmd = NULL;
1714
1715         list_add(&scb->list, &adapter->free_list);
1716 }
1717
1718
1719 static int
1720 __mega_busywait_mbox (adapter_t *adapter)
1721 {
1722         volatile mbox_t *mbox = adapter->mbox;
1723         long counter;
1724
1725         for (counter = 0; counter < 10000; counter++) {
1726                 if (!mbox->m_in.busy)
1727                         return 0;
1728                 udelay(100); yield();
1729         }
1730         return -1;              /* give up after 1 second */
1731 }
1732
1733 /*
1734  * Copies data to SGLIST
1735  * Note: For 64 bit cards, we need a minimum of one SG element for read/write
1736  */
1737 static int
1738 mega_build_sglist(adapter_t *adapter, scb_t *scb, u32 *buf, u32 *len)
1739 {
1740         struct scatterlist      *sgl;
1741         struct page     *page;
1742         unsigned long   offset;
1743         Scsi_Cmnd       *cmd;
1744         int     sgcnt;
1745         int     idx;
1746
1747         cmd = scb->cmd;
1748
1749         /* Scatter-gather not used */
1750         if( !cmd->use_sg ) {
1751
1752                 page = virt_to_page(cmd->request_buffer);
1753                 offset = offset_in_page(cmd->request_buffer);
1754
1755                 scb->dma_h_bulkdata = pci_map_page(adapter->dev,
1756                                                   page, offset,
1757                                                   cmd->request_bufflen,
1758                                                   scb->dma_direction);
1759                 scb->dma_type = MEGA_BULK_DATA;
1760
1761                 /*
1762                  * We need to handle special 64-bit commands that need a
1763                  * minimum of 1 SG
1764                  */
1765                 if( adapter->has_64bit_addr ) {
1766                         scb->sgl64[0].address = scb->dma_h_bulkdata;
1767                         scb->sgl64[0].length = cmd->request_bufflen;
1768                         *buf = (u32)scb->sgl_dma_addr;
1769                         *len = (u32)cmd->request_bufflen;
1770                         return 1;
1771                 }
1772                 else {
1773                         *buf = (u32)scb->dma_h_bulkdata;
1774                         *len = (u32)cmd->request_bufflen;
1775                 }
1776                 return 0;
1777         }
1778
1779         sgl = (struct scatterlist *)cmd->request_buffer;
1780
1781         /*
1782          * Copy Scatter-Gather list info into controller structure.
1783          *
1784          * The number of sg elements returned must not exceed our limit
1785          */
1786         sgcnt = pci_map_sg(adapter->dev, sgl, cmd->use_sg,
1787                         scb->dma_direction);
1788
1789         scb->dma_type = MEGA_SGLIST;
1790
1791         if( sgcnt > adapter->sglen ) BUG();
1792
1793         for( idx = 0; idx < sgcnt; idx++, sgl++ ) {
1794
1795                 if( adapter->has_64bit_addr ) {
1796                         scb->sgl64[idx].address = sg_dma_address(sgl);
1797                         scb->sgl64[idx].length = sg_dma_len(sgl);
1798                 }
1799                 else {
1800                         scb->sgl[idx].address = sg_dma_address(sgl);
1801                         scb->sgl[idx].length = sg_dma_len(sgl);
1802                 }
1803         }
1804
1805         /* Reset pointer and length fields */
1806         *buf = scb->sgl_dma_addr;
1807
1808         /*
1809          * For passthru command, dataxferlen must be set, even for commands
1810          * with a sg list
1811          */
1812         *len = (u32)cmd->request_bufflen;
1813
1814         /* Return count of SG requests */
1815         return sgcnt;
1816 }
1817
1818
1819 /*
1820  * mega_8_to_40ld()
1821  *
1822  * takes all info in AdapterInquiry structure and puts it into ProductInfo and
1823  * Enquiry3 structures for later use
1824  */
1825 static void
1826 mega_8_to_40ld(mraid_inquiry *inquiry, mega_inquiry3 *enquiry3,
1827                 mega_product_info *product_info)
1828 {
1829         int i;
1830
1831         product_info->max_commands = inquiry->adapter_info.max_commands;
1832         enquiry3->rebuild_rate = inquiry->adapter_info.rebuild_rate;
1833         product_info->nchannels = inquiry->adapter_info.nchannels;
1834
1835         for (i = 0; i < 4; i++) {
1836                 product_info->fw_version[i] =
1837                         inquiry->adapter_info.fw_version[i];
1838
1839                 product_info->bios_version[i] =
1840                         inquiry->adapter_info.bios_version[i];
1841         }
1842         enquiry3->cache_flush_interval =
1843                 inquiry->adapter_info.cache_flush_interval;
1844
1845         product_info->dram_size = inquiry->adapter_info.dram_size;
1846
1847         enquiry3->num_ldrv = inquiry->logdrv_info.num_ldrv;
1848
1849         for (i = 0; i < MAX_LOGICAL_DRIVES_8LD; i++) {
1850                 enquiry3->ldrv_size[i] = inquiry->logdrv_info.ldrv_size[i];
1851                 enquiry3->ldrv_prop[i] = inquiry->logdrv_info.ldrv_prop[i];
1852                 enquiry3->ldrv_state[i] = inquiry->logdrv_info.ldrv_state[i];
1853         }
1854
1855         for (i = 0; i < (MAX_PHYSICAL_DRIVES); i++)
1856                 enquiry3->pdrv_state[i] = inquiry->pdrv_info.pdrv_state[i];
1857 }
1858
1859 static inline void
1860 mega_free_sgl(adapter_t *adapter)
1861 {
1862         scb_t   *scb;
1863         int     i;
1864
1865         for(i = 0; i < adapter->max_cmds; i++) {
1866
1867                 scb = &adapter->scb_list[i];
1868
1869                 if( scb->sgl64 ) {
1870                         pci_free_consistent(adapter->dev,
1871                                 sizeof(mega_sgl64) * adapter->sglen,
1872                                 scb->sgl64,
1873                                 scb->sgl_dma_addr);
1874
1875                         scb->sgl64 = NULL;
1876                 }
1877
1878                 if( scb->pthru ) {
1879                         pci_free_consistent(adapter->dev, sizeof(mega_passthru),
1880                                 scb->pthru, scb->pthru_dma_addr);
1881
1882                         scb->pthru = NULL;
1883                 }
1884
1885                 if( scb->epthru ) {
1886                         pci_free_consistent(adapter->dev,
1887                                 sizeof(mega_ext_passthru),
1888                                 scb->epthru, scb->epthru_dma_addr);
1889
1890                         scb->epthru = NULL;
1891                 }
1892
1893         }
1894 }
1895
1896
1897 /*
1898  * Get information about the card/driver
1899  */
1900 const char *
1901 megaraid_info(struct Scsi_Host *host)
1902 {
1903         static char buffer[512];
1904         adapter_t *adapter;
1905
1906         adapter = (adapter_t *)host->hostdata;
1907
1908         sprintf (buffer,
1909                  "LSI Logic MegaRAID %s %d commands %d targs %d chans %d luns",
1910                  adapter->fw_version, adapter->product_info.max_commands,
1911                  adapter->host->max_id, adapter->host->max_channel,
1912                  adapter->host->max_lun);
1913         return buffer;
1914 }
1915
1916 /*
1917  * Abort a previous SCSI request. Only commands on the pending list can be
1918  * aborted. All the commands issued to the F/W must complete.
1919  */
1920 static int
1921 megaraid_abort(Scsi_Cmnd *cmd)
1922 {
1923         adapter_t       *adapter;
1924         int             rval;
1925
1926         adapter = (adapter_t *)cmd->device->host->hostdata;
1927
1928         rval =  megaraid_abort_and_reset(adapter, cmd, SCB_ABORT);
1929
1930         /*
1931          * This is required here to complete any completed requests
1932          * to be communicated over to the mid layer.
1933          */
1934         mega_rundoneq(adapter);
1935
1936         return rval;
1937 }
1938
1939
1940 static int
1941 megaraid_reset(struct scsi_cmnd *cmd)
1942 {
1943         adapter_t       *adapter;
1944         megacmd_t       mc;
1945         int             rval;
1946
1947         adapter = (adapter_t *)cmd->device->host->hostdata;
1948
1949 #if MEGA_HAVE_CLUSTERING
1950         mc.cmd = MEGA_CLUSTER_CMD;
1951         mc.opcode = MEGA_RESET_RESERVATIONS;
1952
1953         if( mega_internal_command(adapter, LOCK_INT, &mc, NULL) != 0 ) {
1954                 printk(KERN_WARNING
1955                                 "megaraid: reservation reset failed.\n");
1956         }
1957         else {
1958                 printk(KERN_INFO "megaraid: reservation reset.\n");
1959         }
1960 #endif
1961
1962         spin_lock_irq(&adapter->lock);
1963
1964         rval =  megaraid_abort_and_reset(adapter, cmd, SCB_RESET);
1965
1966         /*
1967          * This is required here to complete any completed requests
1968          * to be communicated over to the mid layer.
1969          */
1970         mega_rundoneq(adapter);
1971         spin_unlock_irq(&adapter->lock);
1972
1973         return rval;
1974 }
1975
1976 /**
1977  * megaraid_abort_and_reset()
1978  * @adapter - megaraid soft state
1979  * @cmd - scsi command to be aborted or reset
1980  * @aor - abort or reset flag
1981  *
1982  * Try to locate the scsi command in the pending queue. If found and is not
1983  * issued to the controller, abort/reset it. Otherwise return failure
1984  */
1985 static int
1986 megaraid_abort_and_reset(adapter_t *adapter, Scsi_Cmnd *cmd, int aor)
1987 {
1988         struct list_head        *pos, *next;
1989         scb_t                   *scb;
1990
1991         printk(KERN_WARNING "megaraid: %s-%lx cmd=%x <c=%d t=%d l=%d>\n",
1992              (aor == SCB_ABORT)? "ABORTING":"RESET", cmd->serial_number,
1993              cmd->cmnd[0], cmd->device->channel,
1994              cmd->device->id, cmd->device->lun);
1995
1996         if(list_empty(&adapter->pending_list))
1997                 return FALSE;
1998
1999         list_for_each_safe(pos, next, &adapter->pending_list) {
2000
2001                 scb = list_entry(pos, scb_t, list);
2002
2003                 if (scb->cmd == cmd) { /* Found command */
2004
2005                         scb->state |= aor;
2006
2007                         /*
2008                          * Check if this command has firmare owenership. If
2009                          * yes, we cannot reset this command. Whenever, f/w
2010                          * completes this command, we will return appropriate
2011                          * status from ISR.
2012                          */
2013                         if( scb->state & SCB_ISSUED ) {
2014
2015                                 printk(KERN_WARNING
2016                                         "megaraid: %s-%lx[%x], fw owner.\n",
2017                                         (aor==SCB_ABORT) ? "ABORTING":"RESET",
2018                                         cmd->serial_number, scb->idx);
2019
2020                                 return FALSE;
2021                         }
2022                         else {
2023
2024                                 /*
2025                                  * Not yet issued! Remove from the pending
2026                                  * list
2027                                  */
2028                                 printk(KERN_WARNING
2029                                         "megaraid: %s-%lx[%x], driver owner.\n",
2030                                         (aor==SCB_ABORT) ? "ABORTING":"RESET",
2031                                         cmd->serial_number, scb->idx);
2032
2033                                 mega_free_scb(adapter, scb);
2034
2035                                 if( aor == SCB_ABORT ) {
2036                                         cmd->result = (DID_ABORT << 16);
2037                                 }
2038                                 else {
2039                                         cmd->result = (DID_RESET << 16);
2040                                 }
2041
2042                                 list_add_tail(SCSI_LIST(cmd),
2043                                                 &adapter->completed_list);
2044
2045                                 return TRUE;
2046                         }
2047                 }
2048         }
2049
2050         return FALSE;
2051 }
2052
2053 static inline int
2054 make_local_pdev(adapter_t *adapter, struct pci_dev **pdev)
2055 {
2056         *pdev = kmalloc(sizeof(struct pci_dev), GFP_KERNEL);
2057
2058         if( *pdev == NULL ) return -1;
2059
2060         memcpy(*pdev, adapter->dev, sizeof(struct pci_dev));
2061
2062         if( pci_set_dma_mask(*pdev, 0xffffffff) != 0 ) {
2063                 kfree(*pdev);
2064                 return -1;
2065         }
2066
2067         return 0;
2068 }
2069
2070 static inline void
2071 free_local_pdev(struct pci_dev *pdev)
2072 {
2073         kfree(pdev);
2074 }
2075
2076 /**
2077  * mega_allocate_inquiry()
2078  * @dma_handle - handle returned for dma address
2079  * @pdev - handle to pci device
2080  *
2081  * allocates memory for inquiry structure
2082  */
2083 static inline void *
2084 mega_allocate_inquiry(dma_addr_t *dma_handle, struct pci_dev *pdev)
2085 {
2086         return pci_alloc_consistent(pdev, sizeof(mega_inquiry3), dma_handle);
2087 }
2088
2089
2090 static inline void
2091 mega_free_inquiry(void *inquiry, dma_addr_t dma_handle, struct pci_dev *pdev)
2092 {
2093         pci_free_consistent(pdev, sizeof(mega_inquiry3), inquiry, dma_handle);
2094 }
2095
2096
2097 #ifdef CONFIG_PROC_FS
2098 /* Following code handles /proc fs  */
2099
2100 #define CREATE_READ_PROC(string, func)  create_proc_read_entry(string,  \
2101                                         S_IRUSR | S_IFREG,              \
2102                                         controller_proc_dir_entry,      \
2103                                         func, adapter)
2104
2105 /**
2106  * mega_create_proc_entry()
2107  * @index - index in soft state array
2108  * @parent - parent node for this /proc entry
2109  *
2110  * Creates /proc entries for our controllers.
2111  */
2112 static void
2113 mega_create_proc_entry(int index, struct proc_dir_entry *parent)
2114 {
2115         struct proc_dir_entry   *controller_proc_dir_entry = NULL;
2116         u8              string[64] = { 0 };
2117         adapter_t       *adapter = hba_soft_state[index];
2118
2119         sprintf(string, "hba%d", adapter->host->host_no);
2120
2121         controller_proc_dir_entry =
2122                 adapter->controller_proc_dir_entry = proc_mkdir(string, parent);
2123
2124         if(!controller_proc_dir_entry) {
2125                 printk(KERN_WARNING "\nmegaraid: proc_mkdir failed\n");
2126                 return;
2127         }
2128         adapter->proc_read = CREATE_READ_PROC("config", proc_read_config);
2129         adapter->proc_stat = CREATE_READ_PROC("stat", proc_read_stat);
2130         adapter->proc_mbox = CREATE_READ_PROC("mailbox", proc_read_mbox);
2131 #if MEGA_HAVE_ENH_PROC
2132         adapter->proc_rr = CREATE_READ_PROC("rebuild-rate", proc_rebuild_rate);
2133         adapter->proc_battery = CREATE_READ_PROC("battery-status",
2134                         proc_battery);
2135
2136         /*
2137          * Display each physical drive on its channel
2138          */
2139         adapter->proc_pdrvstat[0] = CREATE_READ_PROC("diskdrives-ch0",
2140                                         proc_pdrv_ch0);
2141         adapter->proc_pdrvstat[1] = CREATE_READ_PROC("diskdrives-ch1",
2142                                         proc_pdrv_ch1);
2143         adapter->proc_pdrvstat[2] = CREATE_READ_PROC("diskdrives-ch2",
2144                                         proc_pdrv_ch2);
2145         adapter->proc_pdrvstat[3] = CREATE_READ_PROC("diskdrives-ch3",
2146                                         proc_pdrv_ch3);
2147
2148         /*
2149          * Display a set of up to 10 logical drive through each of following
2150          * /proc entries
2151          */
2152         adapter->proc_rdrvstat[0] = CREATE_READ_PROC("raiddrives-0-9",
2153                                         proc_rdrv_10);
2154         adapter->proc_rdrvstat[1] = CREATE_READ_PROC("raiddrives-10-19",
2155                                         proc_rdrv_20);
2156         adapter->proc_rdrvstat[2] = CREATE_READ_PROC("raiddrives-20-29",
2157                                         proc_rdrv_30);
2158         adapter->proc_rdrvstat[3] = CREATE_READ_PROC("raiddrives-30-39",
2159                                         proc_rdrv_40);
2160 #endif
2161 }
2162
2163
2164 /**
2165  * proc_read_config()
2166  * @page - buffer to write the data in
2167  * @start - where the actual data has been written in page
2168  * @offset - same meaning as the read system call
2169  * @count - same meaning as the read system call
2170  * @eof - set if no more data needs to be returned
2171  * @data - pointer to our soft state
2172  *
2173  * Display configuration information about the controller.
2174  */
2175 static int
2176 proc_read_config(char *page, char **start, off_t offset, int count, int *eof,
2177                 void *data)
2178 {
2179
2180         adapter_t *adapter = (adapter_t *)data;
2181         int len = 0;
2182
2183         len += sprintf(page+len, "%s", MEGARAID_VERSION);
2184
2185         if(adapter->product_info.product_name[0])
2186                 len += sprintf(page+len, "%s\n",
2187                                 adapter->product_info.product_name);
2188
2189         len += sprintf(page+len, "Controller Type: ");
2190
2191         if( adapter->flag & BOARD_MEMMAP ) {
2192                 len += sprintf(page+len,
2193                         "438/466/467/471/493/518/520/531/532\n");
2194         }
2195         else {
2196                 len += sprintf(page+len,
2197                         "418/428/434\n");
2198         }
2199
2200         if(adapter->flag & BOARD_40LD) {
2201                 len += sprintf(page+len,
2202                                 "Controller Supports 40 Logical Drives\n");
2203         }
2204
2205         if(adapter->flag & BOARD_64BIT) {
2206                 len += sprintf(page+len,
2207                 "Controller capable of 64-bit memory addressing\n");
2208         }
2209         if( adapter->has_64bit_addr ) {
2210                 len += sprintf(page+len,
2211                         "Controller using 64-bit memory addressing\n");
2212         }
2213         else {
2214                 len += sprintf(page+len,
2215                         "Controller is not using 64-bit memory addressing\n");
2216         }
2217
2218         len += sprintf(page+len, "Base = %08lx, Irq = %d, ", adapter->base,
2219                         adapter->host->irq);
2220
2221         len += sprintf(page+len, "Logical Drives = %d, Channels = %d\n",
2222                         adapter->numldrv, adapter->product_info.nchannels);
2223
2224         len += sprintf(page+len, "Version =%s:%s, DRAM = %dMb\n",
2225                         adapter->fw_version, adapter->bios_version,
2226                         adapter->product_info.dram_size);
2227
2228         len += sprintf(page+len,
2229                 "Controller Queue Depth = %d, Driver Queue Depth = %d\n",
2230                 adapter->product_info.max_commands, adapter->max_cmds);
2231
2232         len += sprintf(page+len, "support_ext_cdb    = %d\n",
2233                         adapter->support_ext_cdb);
2234         len += sprintf(page+len, "support_random_del = %d\n",
2235                         adapter->support_random_del);
2236         len += sprintf(page+len, "boot_ldrv_enabled  = %d\n",
2237                         adapter->boot_ldrv_enabled);
2238         len += sprintf(page+len, "boot_ldrv          = %d\n",
2239                         adapter->boot_ldrv);
2240         len += sprintf(page+len, "boot_pdrv_enabled  = %d\n",
2241                         adapter->boot_pdrv_enabled);
2242         len += sprintf(page+len, "boot_pdrv_ch       = %d\n",
2243                         adapter->boot_pdrv_ch);
2244         len += sprintf(page+len, "boot_pdrv_tgt      = %d\n",
2245                         adapter->boot_pdrv_tgt);
2246         len += sprintf(page+len, "quiescent          = %d\n",
2247                         atomic_read(&adapter->quiescent));
2248         len += sprintf(page+len, "has_cluster        = %d\n",
2249                         adapter->has_cluster);
2250
2251         len += sprintf(page+len, "\nModule Parameters:\n");
2252         len += sprintf(page+len, "max_cmd_per_lun    = %d\n",
2253                         max_cmd_per_lun);
2254         len += sprintf(page+len, "max_sectors_per_io = %d\n",
2255                         max_sectors_per_io);
2256
2257         *eof = 1;
2258
2259         return len;
2260 }
2261
2262
2263
2264 /**
2265  * proc_read_stat()
2266  * @page - buffer to write the data in
2267  * @start - where the actual data has been written in page
2268  * @offset - same meaning as the read system call
2269  * @count - same meaning as the read system call
2270  * @eof - set if no more data needs to be returned
2271  * @data - pointer to our soft state
2272  *
2273  * Diaplay statistical information about the I/O activity.
2274  */
2275 static int
2276 proc_read_stat(char *page, char **start, off_t offset, int count, int *eof,
2277                 void *data)
2278 {
2279         adapter_t       *adapter;
2280         int     len;
2281         int     i;
2282
2283         i = 0;  /* avoid compilation warnings */
2284         len = 0;
2285         adapter = (adapter_t *)data;
2286
2287         len = sprintf(page, "Statistical Information for this controller\n");
2288         len += sprintf(page+len, "pend_cmds = %d\n",
2289                         atomic_read(&adapter->pend_cmds));
2290 #if MEGA_HAVE_STATS
2291         for(i = 0; i < adapter->numldrv; i++) {
2292                 len += sprintf(page+len, "Logical Drive %d:\n", i);
2293
2294                 len += sprintf(page+len,
2295                         "\tReads Issued = %lu, Writes Issued = %lu\n",
2296                         adapter->nreads[i], adapter->nwrites[i]);
2297
2298                 len += sprintf(page+len,
2299                         "\tSectors Read = %lu, Sectors Written = %lu\n",
2300                         adapter->nreadblocks[i], adapter->nwriteblocks[i]);
2301
2302                 len += sprintf(page+len,
2303                         "\tRead errors = %lu, Write errors = %lu\n\n",
2304                         adapter->rd_errors[i], adapter->wr_errors[i]);
2305         }
2306 #else
2307         len += sprintf(page+len,
2308                         "IO and error counters not compiled in driver.\n");
2309 #endif
2310
2311         *eof = 1;
2312
2313         return len;
2314 }
2315
2316
2317 /**
2318  * proc_read_mbox()
2319  * @page - buffer to write the data in
2320  * @start - where the actual data has been written in page
2321  * @offset - same meaning as the read system call
2322  * @count - same meaning as the read system call
2323  * @eof - set if no more data needs to be returned
2324  * @data - pointer to our soft state
2325  *
2326  * Display mailbox information for the last command issued. This information
2327  * is good for debugging.
2328  */
2329 static int
2330 proc_read_mbox(char *page, char **start, off_t offset, int count, int *eof,
2331                 void *data)
2332 {
2333
2334         adapter_t       *adapter = (adapter_t *)data;
2335         volatile mbox_t *mbox = adapter->mbox;
2336         int     len = 0;
2337
2338         len = sprintf(page, "Contents of Mail Box Structure\n");
2339         len += sprintf(page+len, "  Fw Command   = 0x%02x\n",
2340                         mbox->m_out.cmd);
2341         len += sprintf(page+len, "  Cmd Sequence = 0x%02x\n",
2342                         mbox->m_out.cmdid);
2343         len += sprintf(page+len, "  No of Sectors= %04d\n",
2344                         mbox->m_out.numsectors);
2345         len += sprintf(page+len, "  LBA          = 0x%02x\n",
2346                         mbox->m_out.lba);
2347         len += sprintf(page+len, "  DTA          = 0x%08x\n",
2348                         mbox->m_out.xferaddr);
2349         len += sprintf(page+len, "  Logical Drive= 0x%02x\n",
2350                         mbox->m_out.logdrv);
2351         len += sprintf(page+len, "  No of SG Elmt= 0x%02x\n",
2352                         mbox->m_out.numsgelements);
2353         len += sprintf(page+len, "  Busy         = %01x\n",
2354                         mbox->m_in.busy);
2355         len += sprintf(page+len, "  Status       = 0x%02x\n",
2356                         mbox->m_in.status);
2357
2358         *eof = 1;
2359
2360         return len;
2361 }
2362
2363
2364 /**
2365  * proc_rebuild_rate()
2366  * @page - buffer to write the data in
2367  * @start - where the actual data has been written in page
2368  * @offset - same meaning as the read system call
2369  * @count - same meaning as the read system call
2370  * @eof - set if no more data needs to be returned
2371  * @data - pointer to our soft state
2372  *
2373  * Display current rebuild rate
2374  */
2375 static int
2376 proc_rebuild_rate(char *page, char **start, off_t offset, int count, int *eof,
2377                 void *data)
2378 {
2379         adapter_t       *adapter = (adapter_t *)data;
2380         dma_addr_t      dma_handle;
2381         caddr_t         inquiry;
2382         struct pci_dev  *pdev;
2383         int     len = 0;
2384
2385         if( make_local_pdev(adapter, &pdev) != 0 ) {
2386                 *eof = 1;
2387                 return len;
2388         }
2389
2390         if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL ) {
2391                 free_local_pdev(pdev);
2392                 *eof = 1;
2393                 return len;
2394         }
2395
2396         if( mega_adapinq(adapter, dma_handle) != 0 ) {
2397
2398                 len = sprintf(page, "Adapter inquiry failed.\n");
2399
2400                 printk(KERN_WARNING "megaraid: inquiry failed.\n");
2401
2402                 mega_free_inquiry(inquiry, dma_handle, pdev);
2403
2404                 free_local_pdev(pdev);
2405
2406                 *eof = 1;
2407
2408                 return len;
2409         }
2410
2411         if( adapter->flag & BOARD_40LD ) {
2412                 len = sprintf(page, "Rebuild Rate: [%d%%]\n",
2413                         ((mega_inquiry3 *)inquiry)->rebuild_rate);
2414         }
2415         else {
2416                 len = sprintf(page, "Rebuild Rate: [%d%%]\n",
2417                         ((mraid_ext_inquiry *)
2418                         inquiry)->raid_inq.adapter_info.rebuild_rate);
2419         }
2420
2421
2422         mega_free_inquiry(inquiry, dma_handle, pdev);
2423
2424         free_local_pdev(pdev);
2425
2426         *eof = 1;
2427
2428         return len;
2429 }
2430
2431
2432 /**
2433  * proc_battery()
2434  * @page - buffer to write the data in
2435  * @start - where the actual data has been written in page
2436  * @offset - same meaning as the read system call
2437  * @count - same meaning as the read system call
2438  * @eof - set if no more data needs to be returned
2439  * @data - pointer to our soft state
2440  *
2441  * Display information about the battery module on the controller.
2442  */
2443 static int
2444 proc_battery(char *page, char **start, off_t offset, int count, int *eof,
2445                 void *data)
2446 {
2447         adapter_t       *adapter = (adapter_t *)data;
2448         dma_addr_t      dma_handle;
2449         caddr_t         inquiry;
2450         struct pci_dev  *pdev;
2451         u8      battery_status = 0;
2452         char    str[256];
2453         int     len = 0;
2454
2455         if( make_local_pdev(adapter, &pdev) != 0 ) {
2456                 *eof = 1;
2457                 return len;
2458         }
2459
2460         if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL ) {
2461                 free_local_pdev(pdev);
2462                 *eof = 1;
2463                 return len;
2464         }
2465
2466         if( mega_adapinq(adapter, dma_handle) != 0 ) {
2467
2468                 len = sprintf(page, "Adapter inquiry failed.\n");
2469
2470                 printk(KERN_WARNING "megaraid: inquiry failed.\n");
2471
2472                 mega_free_inquiry(inquiry, dma_handle, pdev);
2473
2474                 free_local_pdev(pdev);
2475
2476                 *eof = 1;
2477
2478                 return len;
2479         }
2480
2481         if( adapter->flag & BOARD_40LD ) {
2482                 battery_status = ((mega_inquiry3 *)inquiry)->battery_status;
2483         }
2484         else {
2485                 battery_status = ((mraid_ext_inquiry *)inquiry)->
2486                         raid_inq.adapter_info.battery_status;
2487         }
2488
2489         /*
2490          * Decode the battery status
2491          */
2492         sprintf(str, "Battery Status:[%d]", battery_status);
2493
2494         if(battery_status == MEGA_BATT_CHARGE_DONE)
2495                 strcat(str, " Charge Done");
2496
2497         if(battery_status & MEGA_BATT_MODULE_MISSING)
2498                 strcat(str, " Module Missing");
2499
2500         if(battery_status & MEGA_BATT_LOW_VOLTAGE)
2501                 strcat(str, " Low Voltage");
2502
2503         if(battery_status & MEGA_BATT_TEMP_HIGH)
2504                 strcat(str, " Temperature High");
2505
2506         if(battery_status & MEGA_BATT_PACK_MISSING)
2507                 strcat(str, " Pack Missing");
2508
2509         if(battery_status & MEGA_BATT_CHARGE_INPROG)
2510                 strcat(str, " Charge In-progress");
2511
2512         if(battery_status & MEGA_BATT_CHARGE_FAIL)
2513                 strcat(str, " Charge Fail");
2514
2515         if(battery_status & MEGA_BATT_CYCLES_EXCEEDED)
2516                 strcat(str, " Cycles Exceeded");
2517
2518         len = sprintf(page, "%s\n", str);
2519
2520
2521         mega_free_inquiry(inquiry, dma_handle, pdev);
2522
2523         free_local_pdev(pdev);
2524
2525         *eof = 1;
2526
2527         return len;
2528 }
2529
2530
2531 /**
2532  * proc_pdrv_ch0()
2533  * @page - buffer to write the data in
2534  * @start - where the actual data has been written in page
2535  * @offset - same meaning as the read system call
2536  * @count - same meaning as the read system call
2537  * @eof - set if no more data needs to be returned
2538  * @data - pointer to our soft state
2539  *
2540  * Display information about the physical drives on physical channel 0.
2541  */
2542 static int
2543 proc_pdrv_ch0(char *page, char **start, off_t offset, int count, int *eof,
2544                 void *data)
2545 {
2546         adapter_t *adapter = (adapter_t *)data;
2547
2548         *eof = 1;
2549
2550         return (proc_pdrv(adapter, page, 0));
2551 }
2552
2553
2554 /**
2555  * proc_pdrv_ch1()
2556  * @page - buffer to write the data in
2557  * @start - where the actual data has been written in page
2558  * @offset - same meaning as the read system call
2559  * @count - same meaning as the read system call
2560  * @eof - set if no more data needs to be returned
2561  * @data - pointer to our soft state
2562  *
2563  * Display information about the physical drives on physical channel 1.
2564  */
2565 static int
2566 proc_pdrv_ch1(char *page, char **start, off_t offset, int count, int *eof,
2567                 void *data)
2568 {
2569         adapter_t *adapter = (adapter_t *)data;
2570
2571         *eof = 1;
2572
2573         return (proc_pdrv(adapter, page, 1));
2574 }
2575
2576
2577 /**
2578  * proc_pdrv_ch2()
2579  * @page - buffer to write the data in
2580  * @start - where the actual data has been written in page
2581  * @offset - same meaning as the read system call
2582  * @count - same meaning as the read system call
2583  * @eof - set if no more data needs to be returned
2584  * @data - pointer to our soft state
2585  *
2586  * Display information about the physical drives on physical channel 2.
2587  */
2588 static int
2589 proc_pdrv_ch2(char *page, char **start, off_t offset, int count, int *eof,
2590                 void *data)
2591 {
2592         adapter_t *adapter = (adapter_t *)data;
2593
2594         *eof = 1;
2595
2596         return (proc_pdrv(adapter, page, 2));
2597 }
2598
2599
2600 /**
2601  * proc_pdrv_ch3()
2602  * @page - buffer to write the data in
2603  * @start - where the actual data has been written in page
2604  * @offset - same meaning as the read system call
2605  * @count - same meaning as the read system call
2606  * @eof - set if no more data needs to be returned
2607  * @data - pointer to our soft state
2608  *
2609  * Display information about the physical drives on physical channel 3.
2610  */
2611 static int
2612 proc_pdrv_ch3(char *page, char **start, off_t offset, int count, int *eof,
2613                 void *data)
2614 {
2615         adapter_t *adapter = (adapter_t *)data;
2616
2617         *eof = 1;
2618
2619         return (proc_pdrv(adapter, page, 3));
2620 }
2621
2622
2623 /**
2624  * proc_pdrv()
2625  * @page - buffer to write the data in
2626  * @adapter - pointer to our soft state
2627  *
2628  * Display information about the physical drives.
2629  */
2630 static int
2631 proc_pdrv(adapter_t *adapter, char *page, int channel)
2632 {
2633         dma_addr_t      dma_handle;
2634         char            *scsi_inq;
2635         dma_addr_t      scsi_inq_dma_handle;
2636         caddr_t         inquiry;
2637         struct pci_dev  *pdev;
2638         u8      *pdrv_state;
2639         u8      state;
2640         int     tgt;
2641         int     max_channels;
2642         int     len = 0;
2643         char    str[80];
2644         int     i;
2645
2646         if( make_local_pdev(adapter, &pdev) != 0 ) {
2647                 return len;
2648         }
2649
2650         if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL ) {
2651                 goto free_pdev;
2652         }
2653
2654         if( mega_adapinq(adapter, dma_handle) != 0 ) {
2655                 len = sprintf(page, "Adapter inquiry failed.\n");
2656
2657                 printk(KERN_WARNING "megaraid: inquiry failed.\n");
2658
2659                 goto free_inquiry;
2660         }
2661
2662
2663         scsi_inq = pci_alloc_consistent(pdev, 256, &scsi_inq_dma_handle);
2664
2665         if( scsi_inq == NULL ) {
2666                 len = sprintf(page, "memory not available for scsi inq.\n");
2667
2668                 goto free_inquiry;
2669         }
2670
2671         if( adapter->flag & BOARD_40LD ) {
2672                 pdrv_state = ((mega_inquiry3 *)inquiry)->pdrv_state;
2673         }
2674         else {
2675                 pdrv_state = ((mraid_ext_inquiry *)inquiry)->
2676                         raid_inq.pdrv_info.pdrv_state;
2677         }
2678
2679         max_channels = adapter->product_info.nchannels;
2680
2681         if( channel >= max_channels ) {
2682                 goto free_pci;
2683         }
2684
2685         for( tgt = 0; tgt <= MAX_TARGET; tgt++ ) {
2686
2687                 i = channel*16 + tgt;
2688
2689                 state = *(pdrv_state + i);
2690
2691                 switch( state & 0x0F ) {
2692
2693                 case PDRV_ONLINE:
2694                         sprintf(str,
2695                         "Channel:%2d Id:%2d State: Online",
2696                                 channel, tgt);
2697                         break;
2698
2699                 case PDRV_FAILED:
2700                         sprintf(str,
2701                         "Channel:%2d Id:%2d State: Failed",
2702                                 channel, tgt);
2703                         break;
2704
2705                 case PDRV_RBLD:
2706                         sprintf(str,
2707                         "Channel:%2d Id:%2d State: Rebuild",
2708                                 channel, tgt);
2709                         break;
2710
2711                 case PDRV_HOTSPARE:
2712                         sprintf(str,
2713                         "Channel:%2d Id:%2d State: Hot spare",
2714                                 channel, tgt);
2715                         break;
2716
2717                 default:
2718                         sprintf(str,
2719                         "Channel:%2d Id:%2d State: Un-configured",
2720                                 channel, tgt);
2721                         break;
2722
2723                 }
2724
2725                 /*
2726                  * This interface displays inquiries for disk drives
2727                  * only. Inquries for logical drives and non-disk
2728                  * devices are available through /proc/scsi/scsi
2729                  */
2730                 memset(scsi_inq, 0, 256);
2731                 if( mega_internal_dev_inquiry(adapter, channel, tgt,
2732                                 scsi_inq_dma_handle) ||
2733                                 (scsi_inq[0] & 0x1F) != TYPE_DISK ) {
2734                         continue;
2735                 }
2736
2737                 /*
2738                  * Check for overflow. We print less than 240
2739                  * characters for inquiry
2740                  */
2741                 if( (len + 240) >= PAGE_SIZE ) break;
2742
2743                 len += sprintf(page+len, "%s.\n", str);
2744
2745                 len += mega_print_inquiry(page+len, scsi_inq);
2746         }
2747
2748 free_pci:
2749         pci_free_consistent(pdev, 256, scsi_inq, scsi_inq_dma_handle);
2750 free_inquiry:
2751         mega_free_inquiry(inquiry, dma_handle, pdev);
2752 free_pdev:
2753         free_local_pdev(pdev);
2754
2755         return len;
2756 }
2757
2758
2759 /*
2760  * Display scsi inquiry
2761  */
2762 static int
2763 mega_print_inquiry(char *page, char *scsi_inq)
2764 {
2765         int     len = 0;
2766         int     i;
2767
2768         len = sprintf(page, "  Vendor: ");
2769         for( i = 8; i < 16; i++ ) {
2770                 len += sprintf(page+len, "%c", scsi_inq[i]);
2771         }
2772
2773         len += sprintf(page+len, "  Model: ");
2774
2775         for( i = 16; i < 32; i++ ) {
2776                 len += sprintf(page+len, "%c", scsi_inq[i]);
2777         }
2778
2779         len += sprintf(page+len, "  Rev: ");
2780
2781         for( i = 32; i < 36; i++ ) {
2782                 len += sprintf(page+len, "%c", scsi_inq[i]);
2783         }
2784
2785         len += sprintf(page+len, "\n");
2786
2787         i = scsi_inq[0] & 0x1f;
2788
2789         len += sprintf(page+len, "  Type:   %s ",
2790                 i < MAX_SCSI_DEVICE_CODE ? scsi_device_types[i] :
2791                    "Unknown          ");
2792
2793         len += sprintf(page+len,
2794         "                 ANSI SCSI revision: %02x", scsi_inq[2] & 0x07);
2795
2796         if( (scsi_inq[2] & 0x07) == 1 && (scsi_inq[3] & 0x0f) == 1 )
2797                 len += sprintf(page+len, " CCS\n");
2798         else
2799                 len += sprintf(page+len, "\n");
2800
2801         return len;
2802 }
2803
2804
2805 /**
2806  * proc_rdrv_10()
2807  * @page - buffer to write the data in
2808  * @start - where the actual data has been written in page
2809  * @offset - same meaning as the read system call
2810  * @count - same meaning as the read system call
2811  * @eof - set if no more data needs to be returned
2812  * @data - pointer to our soft state
2813  *
2814  * Display real time information about the logical drives 0 through 9.
2815  */
2816 static int
2817 proc_rdrv_10(char *page, char **start, off_t offset, int count, int *eof,
2818                 void *data)
2819 {
2820         adapter_t *adapter = (adapter_t *)data;
2821
2822         *eof = 1;
2823
2824         return (proc_rdrv(adapter, page, 0, 9));
2825 }
2826
2827
2828 /**
2829  * proc_rdrv_20()
2830  * @page - buffer to write the data in
2831  * @start - where the actual data has been written in page
2832  * @offset - same meaning as the read system call
2833  * @count - same meaning as the read system call
2834  * @eof - set if no more data needs to be returned
2835  * @data - pointer to our soft state
2836  *
2837  * Display real time information about the logical drives 0 through 9.
2838  */
2839 static int
2840 proc_rdrv_20(char *page, char **start, off_t offset, int count, int *eof,
2841                 void *data)
2842 {
2843         adapter_t *adapter = (adapter_t *)data;
2844
2845         *eof = 1;
2846
2847         return (proc_rdrv(adapter, page, 10, 19));
2848 }
2849
2850
2851 /**
2852  * proc_rdrv_30()
2853  * @page - buffer to write the data in
2854  * @start - where the actual data has been written in page
2855  * @offset - same meaning as the read system call
2856  * @count - same meaning as the read system call
2857  * @eof - set if no more data needs to be returned
2858  * @data - pointer to our soft state
2859  *
2860  * Display real time information about the logical drives 0 through 9.
2861  */
2862 static int
2863 proc_rdrv_30(char *page, char **start, off_t offset, int count, int *eof,
2864                 void *data)
2865 {
2866         adapter_t *adapter = (adapter_t *)data;
2867
2868         *eof = 1;
2869
2870         return (proc_rdrv(adapter, page, 20, 29));
2871 }
2872
2873
2874 /**
2875  * proc_rdrv_40()
2876  * @page - buffer to write the data in
2877  * @start - where the actual data has been written in page
2878  * @offset - same meaning as the read system call
2879  * @count - same meaning as the read system call
2880  * @eof - set if no more data needs to be returned
2881  * @data - pointer to our soft state
2882  *
2883  * Display real time information about the logical drives 0 through 9.
2884  */
2885 static int
2886 proc_rdrv_40(char *page, char **start, off_t offset, int count, int *eof,
2887                 void *data)
2888 {
2889         adapter_t *adapter = (adapter_t *)data;
2890
2891         *eof = 1;
2892
2893         return (proc_rdrv(adapter, page, 30, 39));
2894 }
2895
2896
2897 /**
2898  * proc_rdrv()
2899  * @page - buffer to write the data in
2900  * @adapter - pointer to our soft state
2901  * @start - starting logical drive to display
2902  * @end - ending logical drive to display
2903  *
2904  * We do not print the inquiry information since its already available through
2905  * /proc/scsi/scsi interface
2906  */
2907 static int
2908 proc_rdrv(adapter_t *adapter, char *page, int start, int end )
2909 {
2910         dma_addr_t      dma_handle;
2911         logdrv_param    *lparam;
2912         megacmd_t       mc;
2913         char            *disk_array;
2914         dma_addr_t      disk_array_dma_handle;
2915         caddr_t         inquiry;
2916         struct pci_dev  *pdev;
2917         u8      *rdrv_state;
2918         int     num_ldrv;
2919         u32     array_sz;
2920         int     len = 0;
2921         int     i;
2922
2923         if( make_local_pdev(adapter, &pdev) != 0 ) {
2924                 return len;
2925         }
2926
2927         if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL ) {
2928                 free_local_pdev(pdev);
2929                 return len;
2930         }
2931
2932         if( mega_adapinq(adapter, dma_handle) != 0 ) {
2933
2934                 len = sprintf(page, "Adapter inquiry failed.\n");
2935
2936                 printk(KERN_WARNING "megaraid: inquiry failed.\n");
2937
2938                 mega_free_inquiry(inquiry, dma_handle, pdev);
2939
2940                 free_local_pdev(pdev);
2941
2942                 return len;
2943         }
2944
2945         memset(&mc, 0, sizeof(megacmd_t));
2946
2947         if( adapter->flag & BOARD_40LD ) {
2948                 array_sz = sizeof(disk_array_40ld);
2949
2950                 rdrv_state = ((mega_inquiry3 *)inquiry)->ldrv_state;
2951
2952                 num_ldrv = ((mega_inquiry3 *)inquiry)->num_ldrv;
2953         }
2954         else {
2955                 array_sz = sizeof(disk_array_8ld);
2956
2957                 rdrv_state = ((mraid_ext_inquiry *)inquiry)->
2958                         raid_inq.logdrv_info.ldrv_state;
2959
2960                 num_ldrv = ((mraid_ext_inquiry *)inquiry)->
2961                         raid_inq.logdrv_info.num_ldrv;
2962         }
2963
2964         disk_array = pci_alloc_consistent(pdev, array_sz,
2965                         &disk_array_dma_handle);
2966
2967         if( disk_array == NULL ) {
2968                 len = sprintf(page, "memory not available.\n");
2969
2970                 mega_free_inquiry(inquiry, dma_handle, pdev);
2971
2972                 free_local_pdev(pdev);
2973
2974                 return len;
2975         }
2976
2977         mc.xferaddr = (u32)disk_array_dma_handle;
2978
2979         if( adapter->flag & BOARD_40LD ) {
2980                 mc.cmd = FC_NEW_CONFIG;
2981                 mc.opcode = OP_DCMD_READ_CONFIG;
2982
2983                 if( mega_internal_command(adapter, LOCK_INT, &mc, NULL) ) {
2984
2985                         len = sprintf(page, "40LD read config failed.\n");
2986
2987                         mega_free_inquiry(inquiry, dma_handle, pdev);
2988
2989                         pci_free_consistent(pdev, array_sz, disk_array,
2990                                         disk_array_dma_handle);
2991
2992                         free_local_pdev(pdev);
2993
2994                         return len;
2995                 }
2996
2997         }
2998         else {
2999                 mc.cmd = NEW_READ_CONFIG_8LD;
3000
3001                 if( mega_internal_command(adapter, LOCK_INT, &mc, NULL) ) {
3002
3003                         mc.cmd = READ_CONFIG_8LD;
3004
3005                         if( mega_internal_command(adapter, LOCK_INT, &mc,
3006                                                 NULL) ){
3007
3008                                 len = sprintf(page,
3009                                         "8LD read config failed.\n");
3010
3011                                 mega_free_inquiry(inquiry, dma_handle, pdev);
3012
3013                                 pci_free_consistent(pdev, array_sz,
3014                                                 disk_array,
3015                                                 disk_array_dma_handle);
3016
3017                                 free_local_pdev(pdev);
3018
3019                                 return len;
3020                         }
3021                 }
3022         }
3023
3024         for( i = start; i < ( (end+1 < num_ldrv) ? end+1 : num_ldrv ); i++ ) {
3025
3026                 if( adapter->flag & BOARD_40LD ) {
3027                         lparam =
3028                         &((disk_array_40ld *)disk_array)->ldrv[i].lparam;
3029                 }
3030                 else {
3031                         lparam =
3032                         &((disk_array_8ld *)disk_array)->ldrv[i].lparam;
3033                 }
3034
3035                 /*
3036                  * Check for overflow. We print less than 240 characters for
3037                  * information about each logical drive.
3038                  */
3039                 if( (len + 240) >= PAGE_SIZE ) break;
3040
3041                 len += sprintf(page+len, "Logical drive:%2d:, ", i);
3042
3043                 switch( rdrv_state[i] & 0x0F ) {
3044                 case RDRV_OFFLINE:
3045                         len += sprintf(page+len, "state: offline");
3046                         break;
3047
3048                 case RDRV_DEGRADED:
3049                         len += sprintf(page+len, "state: degraded");
3050                         break;
3051
3052                 case RDRV_OPTIMAL:
3053                         len += sprintf(page+len, "state: optimal");
3054                         break;
3055
3056                 case RDRV_DELETED:
3057                         len += sprintf(page+len, "state: deleted");
3058                         break;
3059
3060                 default:
3061                         len += sprintf(page+len, "state: unknown");
3062                         break;
3063                 }
3064
3065                 /*
3066                  * Check if check consistency or initialization is going on
3067                  * for this logical drive.
3068                  */
3069                 if( (rdrv_state[i] & 0xF0) == 0x20 ) {
3070                         len += sprintf(page+len,
3071                                         ", check-consistency in progress");
3072                 }
3073                 else if( (rdrv_state[i] & 0xF0) == 0x10 ) {
3074                         len += sprintf(page+len,
3075                                         ", initialization in progress");
3076                 }
3077
3078                 len += sprintf(page+len, "\n");
3079
3080                 len += sprintf(page+len, "Span depth:%3d, ",
3081                                 lparam->span_depth);
3082
3083                 len += sprintf(page+len, "RAID level:%3d, ",
3084                                 lparam->level);
3085
3086                 len += sprintf(page+len, "Stripe size:%3d, ",
3087                                 lparam->stripe_sz ? lparam->stripe_sz/2: 128);
3088
3089                 len += sprintf(page+len, "Row size:%3d\n",
3090                                 lparam->row_size);
3091
3092
3093                 len += sprintf(page+len, "Read Policy: ");
3094
3095                 switch(lparam->read_ahead) {
3096
3097                 case NO_READ_AHEAD:
3098                         len += sprintf(page+len, "No read ahead, ");
3099                         break;
3100
3101                 case READ_AHEAD:
3102                         len += sprintf(page+len, "Read ahead, ");
3103                         break;
3104
3105                 case ADAP_READ_AHEAD:
3106                         len += sprintf(page+len, "Adaptive, ");
3107                         break;
3108
3109                 }
3110
3111                 len += sprintf(page+len, "Write Policy: ");
3112
3113                 switch(lparam->write_mode) {
3114
3115                 case WRMODE_WRITE_THRU:
3116                         len += sprintf(page+len, "Write thru, ");
3117                         break;
3118
3119                 case WRMODE_WRITE_BACK:
3120                         len += sprintf(page+len, "Write back, ");
3121                         break;
3122                 }
3123
3124                 len += sprintf(page+len, "Cache Policy: ");
3125
3126                 switch(lparam->direct_io) {
3127
3128                 case CACHED_IO:
3129                         len += sprintf(page+len, "Cached IO\n\n");
3130                         break;
3131
3132                 case DIRECT_IO:
3133                         len += sprintf(page+len, "Direct IO\n\n");
3134                         break;
3135                 }
3136         }
3137
3138         mega_free_inquiry(inquiry, dma_handle, pdev);
3139
3140         pci_free_consistent(pdev, array_sz, disk_array,
3141                         disk_array_dma_handle);
3142
3143         free_local_pdev(pdev);
3144
3145         return len;
3146 }
3147
3148 #endif
3149
3150
3151 /**
3152  * megaraid_biosparam()
3153  *
3154  * Return the disk geometry for a particular disk
3155  */
3156 static int
3157 megaraid_biosparam(struct scsi_device *sdev, struct block_device *bdev,
3158                     sector_t capacity, int geom[])
3159 {
3160         adapter_t       *adapter;
3161         unsigned char   *bh;
3162         int     heads;
3163         int     sectors;
3164         int     cylinders;
3165         int     rval;
3166
3167         /* Get pointer to host config structure */
3168         adapter = (adapter_t *)sdev->host->hostdata;
3169
3170         if (IS_RAID_CH(adapter, sdev->channel)) {
3171                         /* Default heads (64) & sectors (32) */
3172                         heads = 64;
3173                         sectors = 32;
3174                         cylinders = (ulong)capacity / (heads * sectors);
3175
3176                         /*
3177                          * Handle extended translation size for logical drives
3178                          * > 1Gb
3179                          */
3180                         if ((ulong)capacity >= 0x200000) {
3181                                 heads = 255;
3182                                 sectors = 63;
3183                                 cylinders = (ulong)capacity / (heads * sectors);
3184                         }
3185
3186                         /* return result */
3187                         geom[0] = heads;
3188                         geom[1] = sectors;
3189                         geom[2] = cylinders;
3190         }
3191         else {
3192                 bh = scsi_bios_ptable(bdev);
3193
3194                 if( bh ) {
3195                         rval = scsi_partsize(bh, capacity,
3196                                             &geom[2], &geom[0], &geom[1]);
3197                         kfree(bh);
3198                         if( rval != -1 )
3199                                 return rval;
3200                 }
3201
3202                 printk(KERN_INFO
3203                 "megaraid: invalid partition on this disk on channel %d\n",
3204                                 sdev->channel);
3205
3206                 /* Default heads (64) & sectors (32) */
3207                 heads = 64;
3208                 sectors = 32;
3209                 cylinders = (ulong)capacity / (heads * sectors);
3210
3211                 /* Handle extended translation size for logical drives > 1Gb */
3212                 if ((ulong)capacity >= 0x200000) {
3213                         heads = 255;
3214                         sectors = 63;
3215                         cylinders = (ulong)capacity / (heads * sectors);
3216                 }
3217
3218                 /* return result */
3219                 geom[0] = heads;
3220                 geom[1] = sectors;
3221                 geom[2] = cylinders;
3222         }
3223
3224         return 0;
3225 }
3226
3227 /**
3228  * mega_init_scb()
3229  * @adapter - pointer to our soft state
3230  *
3231  * Allocate memory for the various pointers in the scb structures:
3232  * scatter-gather list pointer, passthru and extended passthru structure
3233  * pointers.
3234  */
3235 static int
3236 mega_init_scb(adapter_t *adapter)
3237 {
3238         scb_t   *scb;
3239         int     i;
3240
3241         for( i = 0; i < adapter->max_cmds; i++ ) {
3242
3243                 scb = &adapter->scb_list[i];
3244
3245                 scb->sgl64 = NULL;
3246                 scb->sgl = NULL;
3247                 scb->pthru = NULL;
3248                 scb->epthru = NULL;
3249         }
3250
3251         for( i = 0; i < adapter->max_cmds; i++ ) {
3252
3253                 scb = &adapter->scb_list[i];
3254
3255                 scb->idx = i;
3256
3257                 scb->sgl64 = pci_alloc_consistent(adapter->dev,
3258                                 sizeof(mega_sgl64) * adapter->sglen,
3259                                 &scb->sgl_dma_addr);
3260
3261                 scb->sgl = (mega_sglist *)scb->sgl64;
3262
3263                 if( !scb->sgl ) {
3264                         printk(KERN_WARNING "RAID: Can't allocate sglist.\n");
3265                         mega_free_sgl(adapter);
3266                         return -1;
3267                 }
3268
3269                 scb->pthru = pci_alloc_consistent(adapter->dev,
3270                                 sizeof(mega_passthru),
3271                                 &scb->pthru_dma_addr);
3272
3273                 if( !scb->pthru ) {
3274                         printk(KERN_WARNING "RAID: Can't allocate passthru.\n");
3275                         mega_free_sgl(adapter);
3276                         return -1;
3277                 }
3278
3279                 scb->epthru = pci_alloc_consistent(adapter->dev,
3280                                 sizeof(mega_ext_passthru),
3281                                 &scb->epthru_dma_addr);
3282
3283                 if( !scb->epthru ) {
3284                         printk(KERN_WARNING
3285                                 "Can't allocate extended passthru.\n");
3286                         mega_free_sgl(adapter);
3287                         return -1;
3288                 }
3289
3290
3291                 scb->dma_type = MEGA_DMA_TYPE_NONE;
3292
3293                 /*
3294                  * Link to free list
3295                  * lock not required since we are loading the driver, so no
3296                  * commands possible right now.
3297                  */
3298                 scb->state = SCB_FREE;
3299                 scb->cmd = NULL;
3300                 list_add(&scb->list, &adapter->free_list);
3301         }
3302
3303         return 0;
3304 }
3305
3306
3307 /**
3308  * megadev_open()
3309  * @inode - unused
3310  * @filep - unused
3311  *
3312  * Routines for the character/ioctl interface to the driver. Find out if this
3313  * is a valid open. If yes, increment the module use count so that it cannot
3314  * be unloaded.
3315  */
3316 static int
3317 megadev_open (struct inode *inode, struct file *filep)
3318 {
3319         /*
3320          * Only allow superuser to access private ioctl interface
3321          */
3322         if( !capable(CAP_SYS_ADMIN) ) return -EACCES;
3323
3324         return 0;
3325 }
3326
3327
3328 /**
3329  * megadev_ioctl()
3330  * @inode - Our device inode
3331  * @filep - unused
3332  * @cmd - ioctl command
3333  * @arg - user buffer
3334  *
3335  * ioctl entry point for our private ioctl interface. We move the data in from
3336  * the user space, prepare the command (if necessary, convert the old MIMD
3337  * ioctl to new ioctl command), and issue a synchronous command to the
3338  * controller.
3339  */
3340 static int
3341 megadev_ioctl(struct inode *inode, struct file *filep, unsigned int cmd,
3342                 unsigned long arg)
3343 {
3344         adapter_t       *adapter;
3345         nitioctl_t      uioc;
3346         int             adapno;
3347         int             rval;
3348         mega_passthru   __user *upthru; /* user address for passthru */
3349         mega_passthru   *pthru;         /* copy user passthru here */
3350         dma_addr_t      pthru_dma_hndl;
3351         void            *data = NULL;   /* data to be transferred */
3352         dma_addr_t      data_dma_hndl;  /* dma handle for data xfer area */
3353         megacmd_t       mc;
3354         megastat_t      __user *ustats;
3355         int             num_ldrv;
3356         u32             uxferaddr = 0;
3357         struct pci_dev  *pdev;
3358
3359         ustats = NULL; /* avoid compilation warnings */
3360         num_ldrv = 0;
3361
3362         /*
3363          * Make sure only USCSICMD are issued through this interface.
3364          * MIMD application would still fire different command.
3365          */
3366         if( (_IOC_TYPE(cmd) != MEGAIOC_MAGIC) && (cmd != USCSICMD) ) {
3367                 return -EINVAL;
3368         }
3369
3370         /*
3371          * Check and convert a possible MIMD command to NIT command.
3372          * mega_m_to_n() copies the data from the user space, so we do not
3373          * have to do it here.
3374          * NOTE: We will need some user address to copyout the data, therefore
3375          * the inteface layer will also provide us with the required user
3376          * addresses.
3377          */
3378         memset(&uioc, 0, sizeof(nitioctl_t));
3379         if( (rval = mega_m_to_n( (void __user *)arg, &uioc)) != 0 )
3380                 return rval;
3381
3382
3383         switch( uioc.opcode ) {
3384
3385         case GET_DRIVER_VER:
3386                 if( put_user(driver_ver, (u32 __user *)uioc.uioc_uaddr) )
3387                         return (-EFAULT);
3388
3389                 break;
3390
3391         case GET_N_ADAP:
3392                 if( put_user(hba_count, (u32 __user *)uioc.uioc_uaddr) )
3393                         return (-EFAULT);
3394
3395                 /*
3396                  * Shucks. MIMD interface returns a positive value for number
3397                  * of adapters. TODO: Change it to return 0 when there is no
3398                  * applicatio using mimd interface.
3399                  */
3400                 return hba_count;
3401
3402         case GET_ADAP_INFO:
3403
3404                 /*
3405                  * Which adapter
3406                  */
3407                 if( (adapno = GETADAP(uioc.adapno)) >= hba_count )
3408                         return (-ENODEV);
3409
3410                 if( copy_to_user(uioc.uioc_uaddr, mcontroller+adapno,
3411                                 sizeof(struct mcontroller)) )
3412                         return (-EFAULT);
3413                 break;
3414
3415 #if MEGA_HAVE_STATS
3416
3417         case GET_STATS:
3418                 /*
3419                  * Which adapter
3420                  */
3421                 if( (adapno = GETADAP(uioc.adapno)) >= hba_count )
3422                         return (-ENODEV);
3423
3424                 adapter = hba_soft_state[adapno];
3425
3426                 ustats = uioc.uioc_uaddr;
3427
3428                 if( copy_from_user(&num_ldrv, &ustats->num_ldrv, sizeof(int)) )
3429                         return (-EFAULT);
3430
3431                 /*
3432                  * Check for the validity of the logical drive number
3433                  */
3434                 if( num_ldrv >= MAX_LOGICAL_DRIVES_40LD ) return -EINVAL;
3435
3436                 if( copy_to_user(ustats->nreads, adapter->nreads,
3437                                         num_ldrv*sizeof(u32)) )
3438                         return -EFAULT;
3439
3440                 if( copy_to_user(ustats->nreadblocks, adapter->nreadblocks,
3441                                         num_ldrv*sizeof(u32)) )
3442                         return -EFAULT;
3443
3444                 if( copy_to_user(ustats->nwrites, adapter->nwrites,
3445                                         num_ldrv*sizeof(u32)) )
3446                         return -EFAULT;
3447
3448                 if( copy_to_user(ustats->nwriteblocks, adapter->nwriteblocks,
3449                                         num_ldrv*sizeof(u32)) )
3450                         return -EFAULT;
3451
3452                 if( copy_to_user(ustats->rd_errors, adapter->rd_errors,
3453                                         num_ldrv*sizeof(u32)) )
3454                         return -EFAULT;
3455
3456                 if( copy_to_user(ustats->wr_errors, adapter->wr_errors,
3457                                         num_ldrv*sizeof(u32)) )
3458                         return -EFAULT;
3459
3460                 return 0;
3461
3462 #endif
3463         case MBOX_CMD:
3464
3465                 /*
3466                  * Which adapter
3467                  */
3468                 if( (adapno = GETADAP(uioc.adapno)) >= hba_count )
3469                         return (-ENODEV);
3470
3471                 adapter = hba_soft_state[adapno];
3472
3473                 /*
3474                  * Deletion of logical drive is a special case. The adapter
3475                  * should be quiescent before this command is issued.
3476                  */
3477                 if( uioc.uioc_rmbox[0] == FC_DEL_LOGDRV &&
3478                                 uioc.uioc_rmbox[2] == OP_DEL_LOGDRV ) {
3479
3480                         /*
3481                          * Do we support this feature
3482                          */
3483                         if( !adapter->support_random_del ) {
3484                                 printk(KERN_WARNING "megaraid: logdrv ");
3485                                 printk("delete on non-supporting F/W.\n");
3486
3487                                 return (-EINVAL);
3488                         }
3489
3490                         rval = mega_del_logdrv( adapter, uioc.uioc_rmbox[3] );
3491
3492                         if( rval == 0 ) {
3493                                 memset(&mc, 0, sizeof(megacmd_t));
3494
3495                                 mc.status = rval;
3496
3497                                 rval = mega_n_to_m((void __user *)arg, &mc);
3498                         }
3499
3500                         return rval;
3501                 }
3502                 /*
3503                  * This interface only support the regular passthru commands.
3504                  * Reject extended passthru and 64-bit passthru
3505                  */
3506                 if( uioc.uioc_rmbox[0] == MEGA_MBOXCMD_PASSTHRU64 ||
3507                         uioc.uioc_rmbox[0] == MEGA_MBOXCMD_EXTPTHRU ) {
3508
3509                         printk(KERN_WARNING "megaraid: rejected passthru.\n");
3510
3511                         return (-EINVAL);
3512                 }
3513
3514                 /*
3515                  * For all internal commands, the buffer must be allocated in
3516                  * <4GB address range
3517                  */
3518                 if( make_local_pdev(adapter, &pdev) != 0 )
3519                         return -EIO;
3520
3521                 /* Is it a passthru command or a DCMD */
3522                 if( uioc.uioc_rmbox[0] == MEGA_MBOXCMD_PASSTHRU ) {
3523                         /* Passthru commands */
3524
3525                         pthru = pci_alloc_consistent(pdev,
3526                                         sizeof(mega_passthru),
3527                                         &pthru_dma_hndl);
3528
3529                         if( pthru == NULL ) {
3530                                 free_local_pdev(pdev);
3531                                 return (-ENOMEM);
3532                         }
3533
3534                         /*
3535                          * The user passthru structure
3536                          */
3537                         upthru = (mega_passthru __user *)MBOX(uioc)->xferaddr;
3538
3539                         /*
3540                          * Copy in the user passthru here.
3541                          */
3542                         if( copy_from_user(pthru, upthru,
3543                                                 sizeof(mega_passthru)) ) {
3544
3545                                 pci_free_consistent(pdev,
3546                                                 sizeof(mega_passthru), pthru,
3547                                                 pthru_dma_hndl);
3548
3549                                 free_local_pdev(pdev);
3550
3551                                 return (-EFAULT);
3552                         }
3553
3554                         /*
3555                          * Is there a data transfer
3556                          */
3557                         if( pthru->dataxferlen ) {
3558                                 data = pci_alloc_consistent(pdev,
3559                                                 pthru->dataxferlen,
3560                                                 &data_dma_hndl);
3561
3562                                 if( data == NULL ) {
3563                                         pci_free_consistent(pdev,
3564                                                         sizeof(mega_passthru),
3565                                                         pthru,
3566                                                         pthru_dma_hndl);
3567
3568                                         free_local_pdev(pdev);
3569
3570                                         return (-ENOMEM);
3571                                 }
3572
3573                                 /*
3574                                  * Save the user address and point the kernel
3575                                  * address at just allocated memory
3576                                  */
3577                                 uxferaddr = pthru->dataxferaddr;
3578                                 pthru->dataxferaddr = data_dma_hndl;
3579                         }
3580
3581
3582                         /*
3583                          * Is data coming down-stream
3584                          */
3585                         if( pthru->dataxferlen && (uioc.flags & UIOC_WR) ) {
3586                                 /*
3587                                  * Get the user data
3588                                  */
3589                                 if( copy_from_user(data, (char __user *)uxferaddr,
3590                                                         pthru->dataxferlen) ) {
3591                                         rval = (-EFAULT);
3592                                         goto freemem_and_return;
3593                                 }
3594                         }
3595
3596                         memset(&mc, 0, sizeof(megacmd_t));
3597
3598                         mc.cmd = MEGA_MBOXCMD_PASSTHRU;
3599                         mc.xferaddr = (u32)pthru_dma_hndl;
3600
3601                         /*
3602                          * Issue the command
3603                          */
3604                         mega_internal_command(adapter, LOCK_INT, &mc, pthru);
3605
3606                         rval = mega_n_to_m((void __user *)arg, &mc);
3607
3608                         if( rval ) goto freemem_and_return;
3609
3610
3611                         /*
3612                          * Is data going up-stream
3613                          */
3614                         if( pthru->dataxferlen && (uioc.flags & UIOC_RD) ) {
3615                                 if( copy_to_user((char __user *)uxferaddr, data,
3616                                                         pthru->dataxferlen) ) {
3617                                         rval = (-EFAULT);
3618                                 }
3619                         }
3620
3621                         /*
3622                          * Send the request sense data also, irrespective of
3623                          * whether the user has asked for it or not.
3624                          */
3625                         copy_to_user(upthru->reqsensearea,
3626                                         pthru->reqsensearea, 14);
3627
3628 freemem_and_return:
3629                         if( pthru->dataxferlen ) {
3630                                 pci_free_consistent(pdev,
3631                                                 pthru->dataxferlen, data,
3632                                                 data_dma_hndl);
3633                         }
3634
3635                         pci_free_consistent(pdev, sizeof(mega_passthru),
3636                                         pthru, pthru_dma_hndl);
3637
3638                         free_local_pdev(pdev);
3639
3640                         return rval;
3641                 }
3642                 else {
3643                         /* DCMD commands */
3644
3645                         /*
3646                          * Is there a data transfer
3647                          */
3648                         if( uioc.xferlen ) {
3649                                 data = pci_alloc_consistent(pdev,
3650                                                 uioc.xferlen, &data_dma_hndl);
3651
3652                                 if( data == NULL ) {
3653                                         free_local_pdev(pdev);
3654                                         return (-ENOMEM);
3655                                 }
3656
3657                                 uxferaddr = MBOX(uioc)->xferaddr;
3658                         }
3659
3660                         /*
3661                          * Is data coming down-stream
3662                          */
3663                         if( uioc.xferlen && (uioc.flags & UIOC_WR) ) {
3664                                 /*
3665                                  * Get the user data
3666                                  */
3667                                 if( copy_from_user(data, (char __user *)uxferaddr,
3668                                                         uioc.xferlen) ) {
3669
3670                                         pci_free_consistent(pdev,
3671                                                         uioc.xferlen,
3672                                                         data, data_dma_hndl);
3673
3674                                         free_local_pdev(pdev);
3675
3676                                         return (-EFAULT);
3677                                 }
3678                         }
3679
3680                         memcpy(&mc, MBOX(uioc), sizeof(megacmd_t));
3681
3682                         mc.xferaddr = (u32)data_dma_hndl;
3683
3684                         /*
3685                          * Issue the command
3686                          */
3687                         mega_internal_command(adapter, LOCK_INT, &mc, NULL);
3688
3689                         rval = mega_n_to_m((void __user *)arg, &mc);
3690
3691                         if( rval ) {
3692                                 if( uioc.xferlen ) {
3693                                         pci_free_consistent(pdev,
3694                                                         uioc.xferlen, data,
3695                                                         data_dma_hndl);
3696                                 }
3697
3698                                 free_local_pdev(pdev);
3699
3700                                 return rval;
3701                         }
3702
3703                         /*
3704                          * Is data going up-stream
3705                          */
3706                         if( uioc.xferlen && (uioc.flags & UIOC_RD) ) {
3707                                 if( copy_to_user((char __user *)uxferaddr, data,
3708                                                         uioc.xferlen) ) {
3709
3710                                         rval = (-EFAULT);
3711                                 }
3712                         }
3713
3714                         if( uioc.xferlen ) {
3715                                 pci_free_consistent(pdev,
3716                                                 uioc.xferlen, data,
3717                                                 data_dma_hndl);
3718                         }
3719
3720                         free_local_pdev(pdev);
3721
3722                         return rval;
3723                 }
3724
3725         default:
3726                 return (-EINVAL);
3727         }
3728
3729         return 0;
3730 }
3731
3732 /**
3733  * mega_m_to_n()
3734  * @arg - user address
3735  * @uioc - new ioctl structure
3736  *
3737  * A thin layer to convert older mimd interface ioctl structure to NIT ioctl
3738  * structure
3739  *
3740  * Converts the older mimd ioctl structure to newer NIT structure
3741  */
3742 static int
3743 mega_m_to_n(void __user *arg, nitioctl_t *uioc)
3744 {
3745         struct uioctl_t uioc_mimd;
3746         char    signature[8] = {0};
3747         u8      opcode;
3748         u8      subopcode;
3749
3750
3751         /*
3752          * check is the application conforms to NIT. We do not have to do much
3753          * in that case.
3754          * We exploit the fact that the signature is stored in the very
3755          * begining of the structure.
3756          */
3757
3758         if( copy_from_user(signature, arg, 7) )
3759                 return (-EFAULT);
3760
3761         if( memcmp(signature, "MEGANIT", 7) == 0 ) {
3762
3763                 /*
3764                  * NOTE NOTE: The nit ioctl is still under flux because of
3765                  * change of mailbox definition, in HPE. No applications yet
3766                  * use this interface and let's not have applications use this
3767                  * interface till the new specifitions are in place.
3768                  */
3769                 return -EINVAL;
3770 #if 0
3771                 if( copy_from_user(uioc, arg, sizeof(nitioctl_t)) )
3772                         return (-EFAULT);
3773                 return 0;
3774 #endif
3775         }
3776
3777         /*
3778          * Else assume we have mimd uioctl_t as arg. Convert to nitioctl_t
3779          *
3780          * Get the user ioctl structure
3781          */
3782         if( copy_from_user(&uioc_mimd, arg, sizeof(struct uioctl_t)) )
3783                 return (-EFAULT);
3784
3785
3786         /*
3787          * Get the opcode and subopcode for the commands
3788          */
3789         opcode = uioc_mimd.ui.fcs.opcode;
3790         subopcode = uioc_mimd.ui.fcs.subopcode;
3791
3792         switch (opcode) {
3793         case 0x82:
3794
3795                 switch (subopcode) {
3796
3797                 case MEGAIOC_QDRVRVER:  /* Query driver version */
3798                         uioc->opcode = GET_DRIVER_VER;
3799                         uioc->uioc_uaddr = uioc_mimd.data;
3800                         break;
3801
3802                 case MEGAIOC_QNADAP:    /* Get # of adapters */
3803                         uioc->opcode = GET_N_ADAP;
3804                         uioc->uioc_uaddr = uioc_mimd.data;
3805                         break;
3806
3807                 case MEGAIOC_QADAPINFO: /* Get adapter information */
3808                         uioc->opcode = GET_ADAP_INFO;
3809                         uioc->adapno = uioc_mimd.ui.fcs.adapno;
3810                         uioc->uioc_uaddr = uioc_mimd.data;
3811                         break;
3812
3813                 default:
3814                         return(-EINVAL);
3815                 }
3816
3817                 break;
3818
3819
3820         case 0x81:
3821
3822                 uioc->opcode = MBOX_CMD;
3823                 uioc->adapno = uioc_mimd.ui.fcs.adapno;
3824
3825                 memcpy(uioc->uioc_rmbox, uioc_mimd.mbox, 18);
3826
3827                 uioc->xferlen = uioc_mimd.ui.fcs.length;
3828
3829                 if( uioc_mimd.outlen ) uioc->flags = UIOC_RD;
3830                 if( uioc_mimd.inlen ) uioc->flags |= UIOC_WR;
3831
3832                 break;
3833
3834         case 0x80:
3835
3836                 uioc->opcode = MBOX_CMD;
3837                 uioc->adapno = uioc_mimd.ui.fcs.adapno;
3838
3839                 memcpy(uioc->uioc_rmbox, uioc_mimd.mbox, 18);
3840
3841                 /*
3842                  * Choose the xferlen bigger of input and output data
3843                  */
3844                 uioc->xferlen = uioc_mimd.outlen > uioc_mimd.inlen ?
3845                         uioc_mimd.outlen : uioc_mimd.inlen;
3846
3847                 if( uioc_mimd.outlen ) uioc->flags = UIOC_RD;
3848                 if( uioc_mimd.inlen ) uioc->flags |= UIOC_WR;
3849
3850                 break;
3851
3852         default:
3853                 return (-EINVAL);
3854
3855         }
3856
3857         return 0;
3858 }
3859
3860 /*
3861  * mega_n_to_m()
3862  * @arg - user address
3863  * @mc - mailbox command
3864  *
3865  * Updates the status information to the application, depending on application
3866  * conforms to older mimd ioctl interface or newer NIT ioctl interface
3867  */
3868 static int
3869 mega_n_to_m(void __user *arg, megacmd_t *mc)
3870 {
3871         nitioctl_t      __user *uiocp;
3872         megacmd_t       __user *umc;
3873         mega_passthru   __user *upthru;
3874         struct uioctl_t __user *uioc_mimd;
3875         char    signature[8] = {0};
3876
3877         /*
3878          * check is the application conforms to NIT.
3879          */
3880         if( copy_from_user(signature, arg, 7) )
3881                 return -EFAULT;
3882
3883         if( memcmp(signature, "MEGANIT", 7) == 0 ) {
3884
3885                 uiocp = arg;
3886
3887                 if( put_user(mc->status, (u8 __user *)&MBOX_P(uiocp)->status) )
3888                         return (-EFAULT);
3889
3890                 if( mc->cmd == MEGA_MBOXCMD_PASSTHRU ) {
3891
3892                         umc = MBOX_P(uiocp);
3893
3894                         if (get_user(upthru, (mega_passthru __user * __user *)&umc->xferaddr))
3895                                 return -EFAULT;
3896
3897                         if( put_user(mc->status, (u8 __user *)&upthru->scsistatus))
3898                                 return (-EFAULT);
3899                 }
3900         }
3901         else {
3902                 uioc_mimd = arg;
3903
3904                 if( put_user(mc->status, (u8 __user *)&uioc_mimd->mbox[17]) )
3905                         return (-EFAULT);
3906
3907                 if( mc->cmd == MEGA_MBOXCMD_PASSTHRU ) {
3908
3909                         umc = (megacmd_t __user *)uioc_mimd->mbox;
3910
3911                         if (get_user(upthru, (mega_passthru __user * __user *)&umc->xferaddr))
3912                                 return (-EFAULT);
3913
3914                         if( put_user(mc->status, (u8 __user *)&upthru->scsistatus) )
3915                                 return (-EFAULT);
3916                 }
3917         }
3918
3919         return 0;
3920 }
3921
3922
3923 /*
3924  * MEGARAID 'FW' commands.
3925  */
3926
3927 /**
3928  * mega_is_bios_enabled()
3929  * @adapter - pointer to our soft state
3930  *
3931  * issue command to find out if the BIOS is enabled for this controller
3932  */
3933 static int
3934 mega_is_bios_enabled(adapter_t *adapter)
3935 {
3936         unsigned char   raw_mbox[sizeof(struct mbox_out)];
3937         mbox_t  *mbox;
3938         int     ret;
3939
3940         mbox = (mbox_t *)raw_mbox;
3941
3942         memset(&mbox->m_out, 0, sizeof(raw_mbox));
3943
3944         memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
3945
3946         mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;
3947
3948         raw_mbox[0] = IS_BIOS_ENABLED;
3949         raw_mbox[2] = GET_BIOS;
3950
3951
3952         ret = issue_scb_block(adapter, raw_mbox);
3953
3954         return *(char *)adapter->mega_buffer;
3955 }
3956
3957
3958 /**
3959  * mega_enum_raid_scsi()
3960  * @adapter - pointer to our soft state
3961  *
3962  * Find out what channels are RAID/SCSI. This information is used to
3963  * differentiate the virtual channels and physical channels and to support
3964  * ROMB feature and non-disk devices.
3965  */
3966 static void
3967 mega_enum_raid_scsi(adapter_t *adapter)
3968 {
3969         unsigned char raw_mbox[sizeof(struct mbox_out)];
3970         mbox_t *mbox;
3971         int i;
3972
3973         mbox = (mbox_t *)raw_mbox;
3974
3975         memset(&mbox->m_out, 0, sizeof(raw_mbox));
3976
3977         /*
3978          * issue command to find out what channels are raid/scsi
3979          */
3980         raw_mbox[0] = CHNL_CLASS;
3981         raw_mbox[2] = GET_CHNL_CLASS;
3982
3983         memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
3984
3985         mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;
3986
3987         /*
3988          * Non-ROMB firmware fail this command, so all channels
3989          * must be shown RAID
3990          */
3991         adapter->mega_ch_class = 0xFF;
3992
3993         if(!issue_scb_block(adapter, raw_mbox)) {
3994                 adapter->mega_ch_class = *((char *)adapter->mega_buffer);
3995
3996         }
3997
3998         for( i = 0; i < adapter->product_info.nchannels; i++ ) {
3999                 if( (adapter->mega_ch_class >> i) & 0x01 ) {
4000                         printk(KERN_INFO "megaraid: channel[%d] is raid.\n",
4001                                         i);
4002                 }
4003                 else {
4004                         printk(KERN_INFO "megaraid: channel[%d] is scsi.\n",
4005                                         i);
4006                 }
4007         }
4008
4009         return;
4010 }
4011
4012
4013 /**
4014  * mega_get_boot_drv()
4015  * @adapter - pointer to our soft state
4016  *
4017  * Find out which device is the boot device. Note, any logical drive or any
4018  * phyical device (e.g., a CDROM) can be designated as a boot device.
4019  */
4020 static void
4021 mega_get_boot_drv(adapter_t *adapter)
4022 {
4023         struct private_bios_data        *prv_bios_data;
4024         unsigned char   raw_mbox[sizeof(struct mbox_out)];
4025         mbox_t  *mbox;
4026         u16     cksum = 0;
4027         u8      *cksum_p;
4028         u8      boot_pdrv;
4029         int     i;
4030
4031         mbox = (mbox_t *)raw_mbox;
4032
4033         memset(&mbox->m_out, 0, sizeof(raw_mbox));
4034
4035         raw_mbox[0] = BIOS_PVT_DATA;
4036         raw_mbox[2] = GET_BIOS_PVT_DATA;
4037
4038         memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
4039
4040         mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;
4041
4042         adapter->boot_ldrv_enabled = 0;
4043         adapter->boot_ldrv = 0;
4044
4045         adapter->boot_pdrv_enabled = 0;
4046         adapter->boot_pdrv_ch = 0;
4047         adapter->boot_pdrv_tgt = 0;
4048
4049         if(issue_scb_block(adapter, raw_mbox) == 0) {
4050                 prv_bios_data =
4051                         (struct private_bios_data *)adapter->mega_buffer;
4052
4053                 cksum = 0;
4054                 cksum_p = (char *)prv_bios_data;
4055                 for (i = 0; i < 14; i++ ) {
4056                         cksum += (u16)(*cksum_p++);
4057                 }
4058
4059                 if (prv_bios_data->cksum == (u16)(0-cksum) ) {
4060
4061                         /*
4062                          * If MSB is set, a physical drive is set as boot
4063                          * device
4064                          */
4065                         if( prv_bios_data->boot_drv & 0x80 ) {
4066                                 adapter->boot_pdrv_enabled = 1;
4067                                 boot_pdrv = prv_bios_data->boot_drv & 0x7F;
4068                                 adapter->boot_pdrv_ch = boot_pdrv / 16;
4069                                 adapter->boot_pdrv_tgt = boot_pdrv % 16;
4070                         }
4071                         else {
4072                                 adapter->boot_ldrv_enabled = 1;
4073                                 adapter->boot_ldrv = prv_bios_data->boot_drv;
4074                         }
4075                 }
4076         }
4077
4078 }
4079
4080 /**
4081  * mega_support_random_del()
4082  * @adapter - pointer to our soft state
4083  *
4084  * Find out if this controller supports random deletion and addition of
4085  * logical drives
4086  */
4087 static int
4088 mega_support_random_del(adapter_t *adapter)
4089 {
4090         unsigned char raw_mbox[sizeof(struct mbox_out)];
4091         mbox_t *mbox;
4092         int rval;
4093
4094         mbox = (mbox_t *)raw_mbox;
4095
4096         memset(&mbox->m_out, 0, sizeof(raw_mbox));
4097
4098         /*
4099          * issue command
4100          */
4101         raw_mbox[0] = FC_DEL_LOGDRV;
4102         raw_mbox[2] = OP_SUP_DEL_LOGDRV;
4103
4104         rval = issue_scb_block(adapter, raw_mbox);
4105
4106         return !rval;
4107 }
4108
4109
4110 /**
4111  * mega_support_ext_cdb()
4112  * @adapter - pointer to our soft state
4113  *
4114  * Find out if this firmware support cdblen > 10
4115  */
4116 static int
4117 mega_support_ext_cdb(adapter_t *adapter)
4118 {
4119         unsigned char raw_mbox[sizeof(struct mbox_out)];
4120         mbox_t *mbox;
4121         int rval;
4122
4123         mbox = (mbox_t *)raw_mbox;
4124
4125         memset(&mbox->m_out, 0, sizeof(raw_mbox));
4126         /*
4127          * issue command to find out if controller supports extended CDBs.
4128          */
4129         raw_mbox[0] = 0xA4;
4130         raw_mbox[2] = 0x16;
4131
4132         rval = issue_scb_block(adapter, raw_mbox);
4133
4134         return !rval;
4135 }
4136
4137
4138 /**
4139  * mega_del_logdrv()
4140  * @adapter - pointer to our soft state
4141  * @logdrv - logical drive to be deleted
4142  *
4143  * Delete the specified logical drive. It is the responsibility of the user
4144  * app to let the OS know about this operation.
4145  */
4146 static int
4147 mega_del_logdrv(adapter_t *adapter, int logdrv)
4148 {
4149         unsigned long flags;
4150         scb_t *scb;
4151         int rval;
4152
4153         /*
4154          * Stop sending commands to the controller, queue them internally.
4155          * When deletion is complete, ISR will flush the queue.
4156          */
4157         atomic_set(&adapter->quiescent, 1);
4158
4159         /*
4160          * Wait till all the issued commands are complete and there are no
4161          * commands in the pending queue
4162          */
4163         while (atomic_read(&adapter->pend_cmds) > 0 ||
4164                !list_empty(&adapter->pending_list))
4165                 msleep(1000);   /* sleep for 1s */
4166
4167         rval = mega_do_del_logdrv(adapter, logdrv);
4168
4169         spin_lock_irqsave(&adapter->lock, flags);
4170
4171         /*
4172          * If delete operation was successful, add 0x80 to the logical drive
4173          * ids for commands in the pending queue.
4174          */
4175         if (adapter->read_ldidmap) {
4176                 struct list_head *pos;
4177                 list_for_each(pos, &adapter->pending_list) {
4178                         scb = list_entry(pos, scb_t, list);
4179                         if (scb->pthru->logdrv < 0x80 )
4180                                 scb->pthru->logdrv += 0x80;
4181                 }
4182         }
4183
4184         atomic_set(&adapter->quiescent, 0);
4185
4186         mega_runpendq(adapter);
4187
4188         spin_unlock_irqrestore(&adapter->lock, flags);
4189
4190         return rval;
4191 }
4192
4193
4194 static int
4195 mega_do_del_logdrv(adapter_t *adapter, int logdrv)
4196 {
4197         megacmd_t       mc;
4198         int     rval;
4199
4200         memset( &mc, 0, sizeof(megacmd_t));
4201
4202         mc.cmd = FC_DEL_LOGDRV;
4203         mc.opcode = OP_DEL_LOGDRV;
4204         mc.subopcode = logdrv;
4205
4206         rval = mega_internal_command(adapter, LOCK_INT, &mc, NULL);
4207
4208         /* log this event */
4209         if(rval) {
4210                 printk(KERN_WARNING "megaraid: Delete LD-%d failed.", logdrv);
4211                 return rval;
4212         }
4213
4214         /*
4215          * After deleting first logical drive, the logical drives must be
4216          * addressed by adding 0x80 to the logical drive id.
4217          */
4218         adapter->read_ldidmap = 1;
4219
4220         return rval;
4221 }
4222
4223
4224 /**
4225  * mega_get_max_sgl()
4226  * @adapter - pointer to our soft state
4227  *
4228  * Find out the maximum number of scatter-gather elements supported by this
4229  * version of the firmware
4230  */
4231 static void
4232 mega_get_max_sgl(adapter_t *adapter)
4233 {
4234         unsigned char   raw_mbox[sizeof(struct mbox_out)];
4235         mbox_t  *mbox;
4236
4237         mbox = (mbox_t *)raw_mbox;
4238
4239         memset(mbox, 0, sizeof(raw_mbox));
4240
4241         memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
4242
4243         mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;
4244
4245         raw_mbox[0] = MAIN_MISC_OPCODE;
4246         raw_mbox[2] = GET_MAX_SG_SUPPORT;
4247
4248
4249         if( issue_scb_block(adapter, raw_mbox) ) {
4250                 /*
4251                  * f/w does not support this command. Choose the default value
4252                  */
4253                 adapter->sglen = MIN_SGLIST;
4254         }
4255         else {
4256                 adapter->sglen = *((char *)adapter->mega_buffer);
4257
4258                 /*
4259                  * Make sure this is not more than the resources we are
4260                  * planning to allocate
4261                  */
4262                 if ( adapter->sglen > MAX_SGLIST )
4263                         adapter->sglen = MAX_SGLIST;
4264         }
4265
4266         return;
4267 }
4268
4269
4270 /**
4271  * mega_support_cluster()
4272  * @adapter - pointer to our soft state
4273  *
4274  * Find out if this firmware support cluster calls.
4275  */
4276 static int
4277 mega_support_cluster(adapter_t *adapter)
4278 {
4279         unsigned char   raw_mbox[sizeof(struct mbox_out)];
4280         mbox_t  *mbox;
4281
4282         mbox = (mbox_t *)raw_mbox;
4283
4284         memset(mbox, 0, sizeof(raw_mbox));
4285
4286         memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
4287
4288         mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;
4289
4290         /*
4291          * Try to get the initiator id. This command will succeed iff the
4292          * clustering is available on this HBA.
4293          */
4294         raw_mbox[0] = MEGA_GET_TARGET_ID;
4295
4296         if( issue_scb_block(adapter, raw_mbox) == 0 ) {
4297
4298                 /*
4299                  * Cluster support available. Get the initiator target id.
4300                  * Tell our id to mid-layer too.
4301                  */
4302                 adapter->this_id = *(u32 *)adapter->mega_buffer;
4303                 adapter->host->this_id = adapter->this_id;
4304
4305                 return 1;
4306         }
4307
4308         return 0;
4309 }
4310
4311
4312 /**
4313  * mega_adapinq()
4314  * @adapter - pointer to our soft state
4315  * @dma_handle - DMA address of the buffer
4316  *
4317  * Issue internal comamnds while interrupts are available.
4318  * We only issue direct mailbox commands from within the driver. ioctl()
4319  * interface using these routines can issue passthru commands.
4320  */
4321 static int
4322 mega_adapinq(adapter_t *adapter, dma_addr_t dma_handle)
4323 {
4324         megacmd_t       mc;
4325
4326         memset(&mc, 0, sizeof(megacmd_t));
4327
4328         if( adapter->flag & BOARD_40LD ) {
4329                 mc.cmd = FC_NEW_CONFIG;
4330                 mc.opcode = NC_SUBOP_ENQUIRY3;
4331                 mc.subopcode = ENQ3_GET_SOLICITED_FULL;
4332         }
4333         else {
4334                 mc.cmd = MEGA_MBOXCMD_ADPEXTINQ;
4335         }
4336
4337         mc.xferaddr = (u32)dma_handle;
4338
4339         if ( mega_internal_command(adapter, LOCK_INT, &mc, NULL) != 0 ) {
4340                 return -1;
4341         }
4342
4343         return 0;
4344 }
4345
4346
4347 /** mega_internal_dev_inquiry()
4348  * @adapter - pointer to our soft state
4349  * @ch - channel for this device
4350  * @tgt - ID of this device
4351  * @buf_dma_handle - DMA address of the buffer
4352  *
4353  * Issue the scsi inquiry for the specified device.
4354  */
4355 static int
4356 mega_internal_dev_inquiry(adapter_t *adapter, u8 ch, u8 tgt,
4357                 dma_addr_t buf_dma_handle)
4358 {
4359         mega_passthru   *pthru;
4360         dma_addr_t      pthru_dma_handle;
4361         megacmd_t       mc;
4362         int             rval;
4363         struct pci_dev  *pdev;
4364
4365
4366         /*
4367          * For all internal commands, the buffer must be allocated in <4GB
4368          * address range
4369          */
4370         if( make_local_pdev(adapter, &pdev) != 0 ) return -1;
4371
4372         pthru = pci_alloc_consistent(pdev, sizeof(mega_passthru),
4373                         &pthru_dma_handle);
4374
4375         if( pthru == NULL ) {
4376                 free_local_pdev(pdev);
4377                 return -1;
4378         }
4379
4380         pthru->timeout = 2;
4381         pthru->ars = 1;
4382         pthru->reqsenselen = 14;
4383         pthru->islogical = 0;
4384
4385         pthru->channel = (adapter->flag & BOARD_40LD) ? 0 : ch;
4386
4387         pthru->target = (adapter->flag & BOARD_40LD) ? (ch << 4)|tgt : tgt;
4388
4389         pthru->cdblen = 6;
4390
4391         pthru->cdb[0] = INQUIRY;
4392         pthru->cdb[1] = 0;
4393         pthru->cdb[2] = 0;
4394         pthru->cdb[3] = 0;
4395         pthru->cdb[4] = 255;
4396         pthru->cdb[5] = 0;
4397
4398
4399         pthru->dataxferaddr = (u32)buf_dma_handle;
4400         pthru->dataxferlen = 256;
4401
4402         memset(&mc, 0, sizeof(megacmd_t));
4403
4404         mc.cmd = MEGA_MBOXCMD_PASSTHRU;
4405         mc.xferaddr = (u32)pthru_dma_handle;
4406
4407         rval = mega_internal_command(adapter, LOCK_INT, &mc, pthru);
4408
4409         pci_free_consistent(pdev, sizeof(mega_passthru), pthru,
4410                         pthru_dma_handle);
4411
4412         free_local_pdev(pdev);
4413
4414         return rval;
4415 }
4416
4417
4418 /**
4419  * mega_internal_command()
4420  * @adapter - pointer to our soft state
4421  * @ls - the scope of the exclusion lock.
4422  * @mc - the mailbox command
4423  * @pthru - Passthru structure for DCDB commands
4424  *
4425  * Issue the internal commands in interrupt mode.
4426  * The last argument is the address of the passthru structure if the command
4427  * to be fired is a passthru command
4428  *
4429  * lockscope specifies whether the caller has already acquired the lock. Of
4430  * course, the caller must know which lock we are talking about.
4431  *
4432  * Note: parameter 'pthru' is null for non-passthru commands.
4433  */
4434 static int
4435 mega_internal_command(adapter_t *adapter, lockscope_t ls, megacmd_t *mc,
4436                 mega_passthru *pthru )
4437 {
4438         Scsi_Cmnd       *scmd;
4439         struct  scsi_device *sdev;
4440         unsigned long   flags = 0;
4441         scb_t   *scb;
4442         int     rval;
4443
4444         /*
4445          * The internal commands share one command id and hence are
4446          * serialized. This is so because we want to reserve maximum number of
4447          * available command ids for the I/O commands.
4448          */
4449         down(&adapter->int_mtx);
4450
4451         scb = &adapter->int_scb;
4452         memset(scb, 0, sizeof(scb_t));
4453
4454         scmd = &adapter->int_scmd;
4455         memset(scmd, 0, sizeof(Scsi_Cmnd));
4456
4457         sdev = kmalloc(sizeof(struct scsi_device), GFP_KERNEL);
4458         memset(sdev, 0, sizeof(struct scsi_device));
4459         scmd->device = sdev;
4460
4461         scmd->device->host = adapter->host;
4462         scmd->buffer = (void *)scb;
4463         scmd->cmnd[0] = MEGA_INTERNAL_CMD;
4464
4465         scb->state |= SCB_ACTIVE;
4466         scb->cmd = scmd;
4467
4468         memcpy(scb->raw_mbox, mc, sizeof(megacmd_t));
4469
4470         /*
4471          * Is it a passthru command
4472          */
4473         if( mc->cmd == MEGA_MBOXCMD_PASSTHRU ) {
4474
4475                 scb->pthru = pthru;
4476         }
4477
4478         scb->idx = CMDID_INT_CMDS;
4479
4480         scmd->state = 0;
4481
4482         /*
4483          * Get the lock only if the caller has not acquired it already
4484          */
4485         if( ls == LOCK_INT ) spin_lock_irqsave(&adapter->lock, flags);
4486
4487         megaraid_queue(scmd, mega_internal_done);
4488
4489         if( ls == LOCK_INT ) spin_unlock_irqrestore(&adapter->lock, flags);
4490
4491         /*
4492          * Wait till this command finishes. Do not use
4493          * wait_event_interruptible(). It causes panic if CTRL-C is hit when
4494          * dumping e.g., physical disk information through /proc interface.
4495          */
4496 #if 0
4497         wait_event_interruptible(adapter->int_waitq, scmd->state);
4498 #endif
4499         wait_event(adapter->int_waitq, scmd->state);
4500
4501         rval = scmd->result;
4502         mc->status = scmd->result;
4503         kfree(sdev);
4504
4505         /*
4506          * Print a debug message for all failed commands. Applications can use
4507          * this information.
4508          */
4509         if( scmd->result && trace_level ) {
4510                 printk("megaraid: cmd [%x, %x, %x] status:[%x]\n",
4511                         mc->cmd, mc->opcode, mc->subopcode, scmd->result);
4512         }
4513
4514         up(&adapter->int_mtx);
4515
4516         return rval;
4517 }
4518
4519
4520 /**
4521  * mega_internal_done()
4522  * @scmd - internal scsi command
4523  *
4524  * Callback routine for internal commands.
4525  */
4526 static void
4527 mega_internal_done(Scsi_Cmnd *scmd)
4528 {
4529         adapter_t       *adapter;
4530
4531         adapter = (adapter_t *)scmd->device->host->hostdata;
4532
4533         scmd->state = 1; /* thread waiting for its command to complete */
4534
4535         /*
4536          * See comment in mega_internal_command() routine for
4537          * wait_event_interruptible()
4538          */
4539 #if 0
4540         wake_up_interruptible(&adapter->int_waitq);
4541 #endif
4542         wake_up(&adapter->int_waitq);
4543
4544 }
4545
4546
4547 static struct scsi_host_template megaraid_template = {
4548         .module                         = THIS_MODULE,
4549         .name                           = "MegaRAID",
4550         .proc_name                      = "megaraid",
4551         .info                           = megaraid_info,
4552         .queuecommand                   = megaraid_queue,
4553         .bios_param                     = megaraid_biosparam,
4554         .max_sectors                    = MAX_SECTORS_PER_IO,
4555         .can_queue                      = MAX_COMMANDS,
4556         .this_id                        = DEFAULT_INITIATOR_ID,
4557         .sg_tablesize                   = MAX_SGLIST,
4558         .cmd_per_lun                    = DEF_CMD_PER_LUN,
4559         .use_clustering                 = ENABLE_CLUSTERING,
4560         .eh_abort_handler               = megaraid_abort,
4561         .eh_device_reset_handler        = megaraid_reset,
4562         .eh_bus_reset_handler           = megaraid_reset,
4563         .eh_host_reset_handler          = megaraid_reset,
4564 };
4565
4566 static int __devinit
4567 megaraid_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
4568 {
4569         struct Scsi_Host *host;
4570         adapter_t *adapter;
4571         unsigned long mega_baseport, tbase, flag = 0;
4572         u16 subsysid, subsysvid;
4573         u8 pci_bus, pci_dev_func;
4574         int irq, i, j;
4575         int error = -ENODEV;
4576
4577         if (pci_enable_device(pdev))
4578                 goto out;
4579         pci_set_master(pdev);
4580
4581         pci_bus = pdev->bus->number;
4582         pci_dev_func = pdev->devfn;
4583
4584         /*
4585          * The megaraid3 stuff reports the ID of the Intel part which is not
4586          * remotely specific to the megaraid
4587          */
4588         if (pdev->vendor == PCI_VENDOR_ID_INTEL) {
4589                 u16 magic;
4590                 /*
4591                  * Don't fall over the Compaq management cards using the same
4592                  * PCI identifier
4593                  */
4594                 if (pdev->subsystem_vendor == PCI_VENDOR_ID_COMPAQ &&
4595                     pdev->subsystem_device == 0xC000)
4596                         return -ENODEV;
4597                 /* Now check the magic signature byte */
4598                 pci_read_config_word(pdev, PCI_CONF_AMISIG, &magic);
4599                 if (magic != HBA_SIGNATURE_471 && magic != HBA_SIGNATURE)
4600                         return -ENODEV;
4601                 /* Ok it is probably a megaraid */
4602         }
4603
4604         /*
4605          * For these vendor and device ids, signature offsets are not
4606          * valid and 64 bit is implicit
4607          */
4608         if (id->driver_data & BOARD_64BIT)
4609                 flag |= BOARD_64BIT;
4610         else {
4611                 u32 magic64;
4612
4613                 pci_read_config_dword(pdev, PCI_CONF_AMISIG64, &magic64);
4614                 if (magic64 == HBA_SIGNATURE_64BIT)
4615                         flag |= BOARD_64BIT;
4616         }
4617
4618         subsysvid = pdev->subsystem_vendor;
4619         subsysid = pdev->subsystem_device;
4620
4621         printk(KERN_NOTICE "megaraid: found 0x%4.04x:0x%4.04x:bus %d:",
4622                 id->vendor, id->device, pci_bus);
4623
4624         printk("slot %d:func %d\n",
4625                 PCI_SLOT(pci_dev_func), PCI_FUNC(pci_dev_func));
4626
4627         /* Read the base port and IRQ from PCI */
4628         mega_baseport = pci_resource_start(pdev, 0);
4629         irq = pdev->irq;
4630
4631         tbase = mega_baseport;
4632         if (pci_resource_flags(pdev, 0) & IORESOURCE_MEM) {
4633                 flag |= BOARD_MEMMAP;
4634
4635                 if (!request_mem_region(mega_baseport, 128, "megaraid")) {
4636                         printk(KERN_WARNING "megaraid: mem region busy!\n");
4637                         goto out_disable_device;
4638                 }
4639
4640                 mega_baseport = (unsigned long)ioremap(mega_baseport, 128);
4641                 if (!mega_baseport) {
4642                         printk(KERN_WARNING
4643                                "megaraid: could not map hba memory\n");
4644                         goto out_release_region;
4645                 }
4646         } else {
4647                 flag |= BOARD_IOMAP;
4648                 mega_baseport += 0x10;
4649
4650                 if (!request_region(mega_baseport, 16, "megaraid"))
4651                         goto out_disable_device;
4652         }
4653
4654         /* Initialize SCSI Host structure */
4655         host = scsi_host_alloc(&megaraid_template, sizeof(adapter_t));
4656         if (!host)
4657                 goto out_iounmap;
4658
4659         adapter = (adapter_t *)host->hostdata;
4660         memset(adapter, 0, sizeof(adapter_t));
4661
4662         printk(KERN_NOTICE
4663                 "scsi%d:Found MegaRAID controller at 0x%lx, IRQ:%d\n",
4664                 host->host_no, mega_baseport, irq);
4665
4666         adapter->base = mega_baseport;
4667
4668         INIT_LIST_HEAD(&adapter->free_list);
4669         INIT_LIST_HEAD(&adapter->pending_list);
4670         INIT_LIST_HEAD(&adapter->completed_list);
4671
4672         adapter->flag = flag;
4673         spin_lock_init(&adapter->lock);
4674         scsi_assign_lock(host, &adapter->lock);
4675
4676         host->cmd_per_lun = max_cmd_per_lun;
4677         host->max_sectors = max_sectors_per_io;
4678
4679         adapter->dev = pdev;
4680         adapter->host = host;
4681
4682         adapter->host->irq = irq;
4683
4684         if (flag & BOARD_MEMMAP)
4685                 adapter->host->base = tbase;
4686         else {
4687                 adapter->host->io_port = tbase;
4688                 adapter->host->n_io_port = 16;
4689         }
4690
4691         adapter->host->unique_id = (pci_bus << 8) | pci_dev_func;
4692
4693         /*
4694          * Allocate buffer to issue internal commands.
4695          */
4696         adapter->mega_buffer = pci_alloc_consistent(adapter->dev,
4697                 MEGA_BUFFER_SIZE, &adapter->buf_dma_handle);
4698         if (!adapter->mega_buffer) {
4699                 printk(KERN_WARNING "megaraid: out of RAM.\n");
4700                 goto out_host_put;
4701         }
4702
4703         adapter->scb_list = kmalloc(sizeof(scb_t) * MAX_COMMANDS, GFP_KERNEL);
4704         if (!adapter->scb_list) {
4705                 printk(KERN_WARNING "megaraid: out of RAM.\n");
4706                 goto out_free_cmd_buffer;
4707         }
4708
4709         if (request_irq(irq, (adapter->flag & BOARD_MEMMAP) ?
4710                                 megaraid_isr_memmapped : megaraid_isr_iomapped,
4711                                         SA_SHIRQ, "megaraid", adapter)) {
4712                 printk(KERN_WARNING
4713                         "megaraid: Couldn't register IRQ %d!\n", irq);
4714                 goto out_free_scb_list;
4715         }
4716
4717         if (mega_setup_mailbox(adapter))
4718                 goto out_free_irq;
4719
4720         if (mega_query_adapter(adapter))
4721                 goto out_free_mbox;
4722
4723         /*
4724          * Have checks for some buggy f/w
4725          */
4726         if ((subsysid == 0x1111) && (subsysvid == 0x1111)) {
4727                 /*
4728                  * Which firmware
4729                  */
4730                 if (!strcmp(adapter->fw_version, "3.00") ||
4731                                 !strcmp(adapter->fw_version, "3.01")) {
4732
4733                         printk( KERN_WARNING
4734                                 "megaraid: Your  card is a Dell PERC "
4735                                 "2/SC RAID controller with  "
4736                                 "firmware\nmegaraid: 3.00 or 3.01.  "
4737                                 "This driver is known to have "
4738                                 "corruption issues\nmegaraid: with "
4739                                 "those firmware versions on this "
4740                                 "specific card.  In order\nmegaraid: "
4741                                 "to protect your data, please upgrade "
4742                                 "your firmware to version\nmegaraid: "
4743                                 "3.10 or later, available from the "
4744                                 "Dell Technical Support web\n"
4745                                 "megaraid: site at\nhttp://support."
4746                                 "dell.com/us/en/filelib/download/"
4747                                 "index.asp?fileid=2940\n"
4748                         );
4749                 }
4750         }
4751
4752         /*
4753          * If we have a HP 1M(0x60E7)/2M(0x60E8) controller with
4754          * firmware H.01.07, H.01.08, and H.01.09 disable 64 bit
4755          * support, since this firmware cannot handle 64 bit
4756          * addressing
4757          */
4758         if ((subsysvid == HP_SUBSYS_VID) &&
4759             ((subsysid == 0x60E7) || (subsysid == 0x60E8))) {
4760                 /*
4761                  * which firmware
4762                  */
4763                 if (!strcmp(adapter->fw_version, "H01.07") ||
4764                     !strcmp(adapter->fw_version, "H01.08") ||
4765                     !strcmp(adapter->fw_version, "H01.09") ) {
4766                         printk(KERN_WARNING
4767                                 "megaraid: Firmware H.01.07, "
4768                                 "H.01.08, and H.01.09 on 1M/2M "
4769                                 "controllers\n"
4770                                 "megaraid: do not support 64 bit "
4771                                 "addressing.\nmegaraid: DISABLING "
4772                                 "64 bit support.\n");
4773                         adapter->flag &= ~BOARD_64BIT;
4774                 }
4775         }
4776
4777         if (mega_is_bios_enabled(adapter))
4778                 mega_hbas[hba_count].is_bios_enabled = 1;
4779         mega_hbas[hba_count].hostdata_addr = adapter;
4780
4781         /*
4782          * Find out which channel is raid and which is scsi. This is
4783          * for ROMB support.
4784          */
4785         mega_enum_raid_scsi(adapter);
4786
4787         /*
4788          * Find out if a logical drive is set as the boot drive. If
4789          * there is one, will make that as the first logical drive.
4790          * ROMB: Do we have to boot from a physical drive. Then all
4791          * the physical drives would appear before the logical disks.
4792          * Else, all the physical drives would be exported to the mid
4793          * layer after logical drives.
4794          */
4795         mega_get_boot_drv(adapter);
4796
4797         if (adapter->boot_pdrv_enabled) {
4798                 j = adapter->product_info.nchannels;
4799                 for( i = 0; i < j; i++ )
4800                         adapter->logdrv_chan[i] = 0;
4801                 for( i = j; i < NVIRT_CHAN + j; i++ )
4802                         adapter->logdrv_chan[i] = 1;
4803         } else {
4804                 for (i = 0; i < NVIRT_CHAN; i++)
4805                         adapter->logdrv_chan[i] = 1;
4806                 for (i = NVIRT_CHAN; i < MAX_CHANNELS+NVIRT_CHAN; i++)
4807                         adapter->logdrv_chan[i] = 0;
4808                 adapter->mega_ch_class <<= NVIRT_CHAN;
4809         }
4810
4811         /*
4812          * Do we support random deletion and addition of logical
4813          * drives
4814          */
4815         adapter->read_ldidmap = 0;      /* set it after first logdrv
4816                                                    delete cmd */
4817         adapter->support_random_del = mega_support_random_del(adapter);
4818
4819         /* Initialize SCBs */
4820         if (mega_init_scb(adapter))
4821                 goto out_free_mbox;
4822
4823         /*
4824          * Reset the pending commands counter
4825          */
4826         atomic_set(&adapter->pend_cmds, 0);
4827
4828         /*
4829          * Reset the adapter quiescent flag
4830          */
4831         atomic_set(&adapter->quiescent, 0);
4832
4833         hba_soft_state[hba_count] = adapter;
4834
4835         /*
4836          * Fill in the structure which needs to be passed back to the
4837          * application when it does an ioctl() for controller related
4838          * information.
4839          */
4840         i = hba_count;
4841
4842         mcontroller[i].base = mega_baseport;
4843         mcontroller[i].irq = irq;
4844         mcontroller[i].numldrv = adapter->numldrv;
4845         mcontroller[i].pcibus = pci_bus;
4846         mcontroller[i].pcidev = id->device;
4847         mcontroller[i].pcifun = PCI_FUNC (pci_dev_func);
4848         mcontroller[i].pciid = -1;
4849         mcontroller[i].pcivendor = id->vendor;
4850         mcontroller[i].pcislot = PCI_SLOT(pci_dev_func);
4851         mcontroller[i].uid = (pci_bus << 8) | pci_dev_func;
4852
4853
4854         /* Set the Mode of addressing to 64 bit if we can */
4855         if ((adapter->flag & BOARD_64BIT) && (sizeof(dma_addr_t) == 8)) {
4856                 pci_set_dma_mask(pdev, 0xffffffffffffffffULL);
4857                 adapter->has_64bit_addr = 1;
4858         } else  {
4859                 pci_set_dma_mask(pdev, 0xffffffff);
4860                 adapter->has_64bit_addr = 0;
4861         }
4862
4863         init_MUTEX(&adapter->int_mtx);
4864         init_waitqueue_head(&adapter->int_waitq);
4865
4866         adapter->this_id = DEFAULT_INITIATOR_ID;
4867         adapter->host->this_id = DEFAULT_INITIATOR_ID;
4868
4869 #if MEGA_HAVE_CLUSTERING
4870         /*
4871          * Is cluster support enabled on this controller
4872          * Note: In a cluster the HBAs ( the initiators ) will have
4873          * different target IDs and we cannot assume it to be 7. Call
4874          * to mega_support_cluster() will get the target ids also if
4875          * the cluster support is available
4876          */
4877         adapter->has_cluster = mega_support_cluster(adapter);
4878         if (adapter->has_cluster) {
4879                 printk(KERN_NOTICE
4880                         "megaraid: Cluster driver, initiator id:%d\n",
4881                         adapter->this_id);
4882         }
4883 #endif
4884
4885         pci_set_drvdata(pdev, host);
4886
4887         mega_create_proc_entry(hba_count, mega_proc_dir_entry);
4888
4889         error = scsi_add_host(host, &pdev->dev);
4890         if (error)
4891                 goto out_free_mbox;
4892
4893         scsi_scan_host(host);
4894         hba_count++;
4895         return 0;
4896
4897  out_free_mbox:
4898         pci_free_consistent(adapter->dev, sizeof(mbox64_t),
4899                         adapter->una_mbox64, adapter->una_mbox64_dma);
4900  out_free_irq:
4901         free_irq(adapter->host->irq, adapter);
4902  out_free_scb_list:
4903         kfree(adapter->scb_list);
4904  out_free_cmd_buffer:
4905         pci_free_consistent(adapter->dev, MEGA_BUFFER_SIZE,
4906                         adapter->mega_buffer, adapter->buf_dma_handle);
4907  out_host_put:
4908         scsi_host_put(host);
4909  out_iounmap:
4910         if (flag & BOARD_MEMMAP)
4911                 iounmap((void *)mega_baseport);
4912  out_release_region:
4913         if (flag & BOARD_MEMMAP)
4914                 release_mem_region(tbase, 128);
4915         else
4916                 release_region(mega_baseport, 16);
4917  out_disable_device:
4918         pci_disable_device(pdev);
4919  out:
4920         return error;
4921 }
4922
4923 static void
4924 __megaraid_shutdown(adapter_t *adapter)
4925 {
4926         u_char  raw_mbox[sizeof(struct mbox_out)];
4927         mbox_t  *mbox = (mbox_t *)raw_mbox;
4928         int     i;
4929
4930         /* Flush adapter cache */
4931         memset(&mbox->m_out, 0, sizeof(raw_mbox));
4932         raw_mbox[0] = FLUSH_ADAPTER;
4933
4934         free_irq(adapter->host->irq, adapter);
4935
4936         /* Issue a blocking (interrupts disabled) command to the card */
4937         issue_scb_block(adapter, raw_mbox);
4938
4939         /* Flush disks cache */
4940         memset(&mbox->m_out, 0, sizeof(raw_mbox));
4941         raw_mbox[0] = FLUSH_SYSTEM;
4942
4943         /* Issue a blocking (interrupts disabled) command to the card */
4944         issue_scb_block(adapter, raw_mbox);
4945
4946         if (atomic_read(&adapter->pend_cmds) > 0)
4947                 printk(KERN_WARNING "megaraid: pending commands!!\n");
4948
4949         /*
4950          * Have a delibrate delay to make sure all the caches are
4951          * actually flushed.
4952          */
4953         for (i = 0; i <= 10; i++)
4954                 mdelay(1000);
4955 }
4956
4957 static void
4958 megaraid_remove_one(struct pci_dev *pdev)
4959 {
4960         struct Scsi_Host *host = pci_get_drvdata(pdev);
4961         adapter_t *adapter = (adapter_t *)host->hostdata;
4962         char    buf[12] = { 0 };
4963
4964         scsi_remove_host(host);
4965
4966         __megaraid_shutdown(adapter);
4967
4968         /* Free our resources */
4969         if (adapter->flag & BOARD_MEMMAP) {
4970                 iounmap((void *)adapter->base);
4971                 release_mem_region(adapter->host->base, 128);
4972         } else
4973                 release_region(adapter->base, 16);
4974
4975         mega_free_sgl(adapter);
4976
4977 #ifdef CONFIG_PROC_FS
4978         if (adapter->controller_proc_dir_entry) {
4979                 remove_proc_entry("stat", adapter->controller_proc_dir_entry);
4980                 remove_proc_entry("config",
4981                                 adapter->controller_proc_dir_entry);
4982                 remove_proc_entry("mailbox",
4983                                 adapter->controller_proc_dir_entry);
4984 #if MEGA_HAVE_ENH_PROC
4985                 remove_proc_entry("rebuild-rate",
4986                                 adapter->controller_proc_dir_entry);
4987                 remove_proc_entry("battery-status",
4988                                 adapter->controller_proc_dir_entry);
4989
4990                 remove_proc_entry("diskdrives-ch0",
4991                                 adapter->controller_proc_dir_entry);
4992                 remove_proc_entry("diskdrives-ch1",
4993                                 adapter->controller_proc_dir_entry);
4994                 remove_proc_entry("diskdrives-ch2",
4995                                 adapter->controller_proc_dir_entry);
4996                 remove_proc_entry("diskdrives-ch3",
4997                                 adapter->controller_proc_dir_entry);
4998
4999                 remove_proc_entry("raiddrives-0-9",
5000                                 adapter->controller_proc_dir_entry);
5001                 remove_proc_entry("raiddrives-10-19",
5002                                 adapter->controller_proc_dir_entry);
5003                 remove_proc_entry("raiddrives-20-29",
5004                                 adapter->controller_proc_dir_entry);
5005                 remove_proc_entry("raiddrives-30-39",
5006                                 adapter->controller_proc_dir_entry);
5007 #endif
5008                 sprintf(buf, "hba%d", adapter->host->host_no);
5009                 remove_proc_entry(buf, mega_proc_dir_entry);
5010         }
5011 #endif
5012
5013         pci_free_consistent(adapter->dev, MEGA_BUFFER_SIZE,
5014                         adapter->mega_buffer, adapter->buf_dma_handle);
5015         kfree(adapter->scb_list);
5016         pci_free_consistent(adapter->dev, sizeof(mbox64_t),
5017                         adapter->una_mbox64, adapter->una_mbox64_dma);
5018
5019         scsi_host_put(host);
5020         pci_disable_device(pdev);
5021
5022         hba_count--;
5023 }
5024
5025 static void
5026 megaraid_shutdown(struct device *dev)
5027 {
5028         struct Scsi_Host *host = pci_get_drvdata(to_pci_dev(dev));
5029         adapter_t *adapter = (adapter_t *)host->hostdata;
5030
5031         __megaraid_shutdown(adapter);
5032 }
5033
5034 static struct pci_device_id megaraid_pci_tbl[] = {
5035         {PCI_VENDOR_ID_DELL, PCI_DEVICE_ID_DISCOVERY,
5036                 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
5037         {PCI_VENDOR_ID_DELL, PCI_DEVICE_ID_PERC4_DI,
5038                 PCI_ANY_ID, PCI_ANY_ID, 0, 0, BOARD_64BIT},
5039         {PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_PERC4_QC_VERDE,
5040                 PCI_ANY_ID, PCI_ANY_ID, 0, 0, BOARD_64BIT},
5041         {PCI_VENDOR_ID_AMI, PCI_DEVICE_ID_AMI_MEGARAID,
5042                 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
5043         {PCI_VENDOR_ID_AMI, PCI_DEVICE_ID_AMI_MEGARAID2,
5044                 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
5045         {PCI_VENDOR_ID_AMI, PCI_DEVICE_ID_AMI_MEGARAID3,
5046                 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
5047         {PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_AMI_MEGARAID3,
5048                 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
5049         {PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_AMI_MEGARAID3,
5050                 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
5051         {0,}
5052 };
5053 MODULE_DEVICE_TABLE(pci, megaraid_pci_tbl);
5054
5055 static struct pci_driver megaraid_pci_driver = {
5056         .name           = "megaraid",
5057         .id_table       = megaraid_pci_tbl,
5058         .probe          = megaraid_probe_one,
5059         .remove         = __devexit_p(megaraid_remove_one),
5060         .driver         = {
5061                 .shutdown = megaraid_shutdown,
5062         },
5063 };
5064
5065 static int __init megaraid_init(void)
5066 {
5067         int error;
5068
5069         if ((max_cmd_per_lun <= 0) || (max_cmd_per_lun > MAX_CMD_PER_LUN))
5070                 max_cmd_per_lun = MAX_CMD_PER_LUN;
5071         if (max_mbox_busy_wait > MBOX_BUSY_WAIT)
5072                 max_mbox_busy_wait = MBOX_BUSY_WAIT;
5073
5074 #ifdef CONFIG_PROC_FS
5075         mega_proc_dir_entry = proc_mkdir("megaraid", &proc_root);
5076         if (!mega_proc_dir_entry) {
5077                 printk(KERN_WARNING
5078                                 "megaraid: failed to create megaraid root\n");
5079         }
5080 #endif
5081         error = pci_module_init(&megaraid_pci_driver);
5082         if (error) {
5083 #ifdef CONFIG_PROC_FS
5084                 remove_proc_entry("megaraid", &proc_root);
5085 #endif
5086                 return error;
5087         }
5088
5089         /*
5090          * Register the driver as a character device, for applications
5091          * to access it for ioctls.
5092          * First argument (major) to register_chrdev implies a dynamic
5093          * major number allocation.
5094          */
5095         major = register_chrdev(0, "megadev", &megadev_fops);
5096         if (!major) {
5097                 printk(KERN_WARNING
5098                                 "megaraid: failed to register char device\n");
5099         }
5100
5101         return 0;
5102 }
5103
5104 static void __exit megaraid_exit(void)
5105 {
5106         /*
5107          * Unregister the character device interface to the driver.
5108          */
5109         unregister_chrdev(major, "megadev");
5110
5111         pci_unregister_driver(&megaraid_pci_driver);
5112
5113 #ifdef CONFIG_PROC_FS
5114         remove_proc_entry("megaraid", &proc_root);
5115 #endif
5116 }
5117
5118 module_init(megaraid_init);
5119 module_exit(megaraid_exit);
5120
5121 /* vi: set ts=8 sw=8 tw=78: */