drivers/scsi/megaraid.c

   1 /*
   2  *
   3  *                      Linux MegaRAID device driver
   4  *
   5  * Copyright (c) 2002  LSI Logic Corporation.
   6  *
   7  *         This program is free software; you can redistribute it and/or
   8  *         modify it under the terms of the GNU General Public License
   9  *         as published by the Free Software Foundation; either version
  10  *         2 of the License, or (at your option) any later version.
  11  *
  12  * Copyright (c) 2002  Red Hat, Inc. All rights reserved.
  13  *        - fixes
  14  *        - speed-ups (list handling fixes, issued_list, optimizations.)
  15  *        - lots of cleanups.
  16  *
  17  * Copyright (c) 2003  Christoph Hellwig  <hch@lst.de>
  18  *        - new-style, hotplug-aware pci probing and scsi registration
  19  *
  20  * Version : v2.00.4 Mon Nov 14 14:02:43 EST 2005 - Seokmann Ju
  21  *                                              <Seokmann.Ju@lsil.com>
  22  *
  23  * Description: Linux device driver for LSI Logic MegaRAID controller
  24  *
  25  * Supported controllers: MegaRAID 418, 428, 438, 466, 762, 467, 471, 490, 493
  26  *                                      518, 520, 531, 532
  27  *
  28  * This driver is supported by LSI Logic, with assistance from Red Hat, Dell,
  29  * and others. Please send updates to the mailing list
  30  * linux-scsi@vger.kernel.org .
  31  *
  32  */
  33
  34 #include <linux/mm.h>
  35 #include <linux/fs.h>
  36 #include <linux/blkdev.h>
  37 #include <linux/uaccess.h>
  38 #include <asm/io.h>
  39 #include <linux/completion.h>
  40 #include <linux/delay.h>
  41 #include <linux/proc_fs.h>
  42 #include <linux/seq_file.h>
  43 #include <linux/reboot.h>
  44 #include <linux/module.h>
  45 #include <linux/list.h>
  46 #include <linux/interrupt.h>
  47 #include <linux/pci.h>
  48 #include <linux/init.h>
  49 #include <linux/dma-mapping.h>
  50 #include <linux/mutex.h>
  51 #include <linux/slab.h>
  52 #include <scsi/scsicam.h>
  53
  54 #include "scsi.h"
  55 #include <scsi/scsi_host.h>
  56
  57 #include "megaraid.h"
  58
  59 #define MEGARAID_MODULE_VERSION "2.00.4"
  60
  61 MODULE_AUTHOR ("sju@lsil.com");
  62 MODULE_DESCRIPTION ("LSI Logic MegaRAID legacy driver");
  63 MODULE_LICENSE ("GPL");
  64 MODULE_VERSION(MEGARAID_MODULE_VERSION);
  65
  66 static DEFINE_MUTEX(megadev_mutex);
  67 static unsigned int max_cmd_per_lun = DEF_CMD_PER_LUN;
  68 module_param(max_cmd_per_lun, uint, 0);
  69 MODULE_PARM_DESC(max_cmd_per_lun, "Maximum number of commands which can be issued to a single LUN (default=DEF_CMD_PER_LUN=63)");
  70
  71 static unsigned short int max_sectors_per_io = MAX_SECTORS_PER_IO;
  72 module_param(max_sectors_per_io, ushort, 0);
  73 MODULE_PARM_DESC(max_sectors_per_io, "Maximum number of sectors per I/O request (default=MAX_SECTORS_PER_IO=128)");
  74
  75
  76 static unsigned short int max_mbox_busy_wait = MBOX_BUSY_WAIT;
  77 module_param(max_mbox_busy_wait, ushort, 0);
  78 MODULE_PARM_DESC(max_mbox_busy_wait, "Maximum wait for mailbox in microseconds if busy (default=MBOX_BUSY_WAIT=10)");
  79
  80 #define RDINDOOR(adapter)       readl((adapter)->mmio_base + 0x20)
  81 #define RDOUTDOOR(adapter)      readl((adapter)->mmio_base + 0x2C)
  82 #define WRINDOOR(adapter,value)  writel(value, (adapter)->mmio_base + 0x20)
  83 #define WROUTDOOR(adapter,value) writel(value, (adapter)->mmio_base + 0x2C)
  84
  85 /*
  86  * Global variables
  87  */
  88
  89 static int hba_count;
  90 static adapter_t *hba_soft_state[MAX_CONTROLLERS];
  91 static struct proc_dir_entry *mega_proc_dir_entry;
  92
  93 /* For controller re-ordering */
  94 static struct mega_hbas mega_hbas[MAX_CONTROLLERS];
  95
  96 static long
  97 megadev_unlocked_ioctl(struct file *filep, unsigned int cmd, unsigned long arg);
  98
  99 /*
 100  * The File Operations structure for the serial/ioctl interface of the driver
 101  */
 102 static const struct file_operations megadev_fops = {
 103         .owner          = THIS_MODULE,
 104         .unlocked_ioctl = megadev_unlocked_ioctl,
 105         .open           = megadev_open,
 106         .llseek         = noop_llseek,
 107 };
 108
 109 /*
 110  * Array to structures for storing the information about the controllers. This
 111  * information is sent to the user level applications, when they do an ioctl
 112  * for this information.
 113  */
 114 static struct mcontroller mcontroller[MAX_CONTROLLERS];
 115
 116 /* The current driver version */
 117 static u32 driver_ver = 0x02000000;
 118
 119 /* major number used by the device for character interface */
 120 static int major;
 121
 122 #define IS_RAID_CH(hba, ch)     (((hba)->mega_ch_class >> (ch)) & 0x01)
 123
 124
 125 /*
 126  * Debug variable to print some diagnostic messages
 127  */
 128 static int trace_level;
 129
 130 /**
 131  * mega_setup_mailbox()
 132  * @adapter - pointer to our soft state
 133  *
 134  * Allocates a 8 byte aligned memory for the handshake mailbox.
 135  */
 136 static int
 137 mega_setup_mailbox(adapter_t *adapter)
 138 {
 139         unsigned long   align;
 140
 141         adapter->una_mbox64 = pci_alloc_consistent(adapter->dev,
 142                         sizeof(mbox64_t), &adapter->una_mbox64_dma);
 143
 144         if( !adapter->una_mbox64 ) return -1;
 145
 146         adapter->mbox = &adapter->una_mbox64->mbox;
 147
 148         adapter->mbox = (mbox_t *)((((unsigned long) adapter->mbox) + 15) &
 149                         (~0UL ^ 0xFUL));
 150
 151         adapter->mbox64 = (mbox64_t *)(((unsigned long)adapter->mbox) - 8);
 152
 153         align = ((void *)adapter->mbox) - ((void *)&adapter->una_mbox64->mbox);
 154
 155         adapter->mbox_dma = adapter->una_mbox64_dma + 8 + align;
 156
 157         /*
 158          * Register the mailbox if the controller is an io-mapped controller
 159          */
 160         if( adapter->flag & BOARD_IOMAP ) {
 161
 162                 outb(adapter->mbox_dma & 0xFF,
 163                                 adapter->host->io_port + MBOX_PORT0);
 164
 165                 outb((adapter->mbox_dma >> 8) & 0xFF,
 166                                 adapter->host->io_port + MBOX_PORT1);
 167
 168                 outb((adapter->mbox_dma >> 16) & 0xFF,
 169                                 adapter->host->io_port + MBOX_PORT2);
 170
 171                 outb((adapter->mbox_dma >> 24) & 0xFF,
 172                                 adapter->host->io_port + MBOX_PORT3);
 173
 174                 outb(ENABLE_MBOX_BYTE,
 175                                 adapter->host->io_port + ENABLE_MBOX_REGION);
 176
 177                 irq_ack(adapter);
 178
 179                 irq_enable(adapter);
 180         }
 181
 182         return 0;
 183 }
 184
 185
 186 /*
 187  * mega_query_adapter()
 188  * @adapter - pointer to our soft state
 189  *
 190  * Issue the adapter inquiry commands to the controller and find out
 191  * information and parameter about the devices attached
 192  */
 193 static int
 194 mega_query_adapter(adapter_t *adapter)
 195 {
 196         dma_addr_t      prod_info_dma_handle;
 197         mega_inquiry3   *inquiry3;
 198         u8      raw_mbox[sizeof(struct mbox_out)];
 199         mbox_t  *mbox;
 200         int     retval;
 201
 202         /* Initialize adapter inquiry mailbox */
 203
 204         mbox = (mbox_t *)raw_mbox;
 205
 206         memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
 207         memset(&mbox->m_out, 0, sizeof(raw_mbox));
 208
 209         /*
 210          * Try to issue Inquiry3 command
 211          * if not succeeded, then issue MEGA_MBOXCMD_ADAPTERINQ command and
 212          * update enquiry3 structure
 213          */
 214         mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;
 215
 216         inquiry3 = (mega_inquiry3 *)adapter->mega_buffer;
 217
 218         raw_mbox[0] = FC_NEW_CONFIG;            /* i.e. mbox->cmd=0xA1 */
 219         raw_mbox[2] = NC_SUBOP_ENQUIRY3;        /* i.e. 0x0F */
 220         raw_mbox[3] = ENQ3_GET_SOLICITED_FULL;  /* i.e. 0x02 */
 221
 222         /* Issue a blocking command to the card */
 223         if ((retval = issue_scb_block(adapter, raw_mbox))) {
 224                 /* the adapter does not support 40ld */
 225
 226                 mraid_ext_inquiry       *ext_inq;
 227                 mraid_inquiry           *inq;
 228                 dma_addr_t              dma_handle;
 229
 230                 ext_inq = pci_alloc_consistent(adapter->dev,
 231                                 sizeof(mraid_ext_inquiry), &dma_handle);
 232
 233                 if( ext_inq == NULL ) return -1;
 234
 235                 inq = &ext_inq->raid_inq;
 236
 237                 mbox->m_out.xferaddr = (u32)dma_handle;
 238
 239                 /*issue old 0x04 command to adapter */
 240                 mbox->m_out.cmd = MEGA_MBOXCMD_ADPEXTINQ;
 241
 242                 issue_scb_block(adapter, raw_mbox);
 243
 244                 /*
 245                  * update Enquiry3 and ProductInfo structures with
 246                  * mraid_inquiry structure
 247                  */
 248                 mega_8_to_40ld(inq, inquiry3,
 249                                 (mega_product_info *)&adapter->product_info);
 250
 251                 pci_free_consistent(adapter->dev, sizeof(mraid_ext_inquiry),
 252                                 ext_inq, dma_handle);
 253
 254         } else {                /*adapter supports 40ld */
 255                 adapter->flag |= BOARD_40LD;
 256
 257                 /*
 258                  * get product_info, which is static information and will be
 259                  * unchanged
 260                  */
 261                 prod_info_dma_handle = pci_map_single(adapter->dev, (void *)
 262                                 &adapter->product_info,
 263                                 sizeof(mega_product_info), PCI_DMA_FROMDEVICE);
 264
 265                 mbox->m_out.xferaddr = prod_info_dma_handle;
 266
 267                 raw_mbox[0] = FC_NEW_CONFIG;    /* i.e. mbox->cmd=0xA1 */
 268                 raw_mbox[2] = NC_SUBOP_PRODUCT_INFO;    /* i.e. 0x0E */
 269
 270                 if ((retval = issue_scb_block(adapter, raw_mbox)))
 271                         dev_warn(&adapter->dev->dev,
 272                                 "Product_info cmd failed with error: %d\n",
 273                                 retval);
 274
 275                 pci_unmap_single(adapter->dev, prod_info_dma_handle,
 276                                 sizeof(mega_product_info), PCI_DMA_FROMDEVICE);
 277         }
 278
 279
 280         /*
 281          * kernel scans the channels from 0 to <= max_channel
 282          */
 283         adapter->host->max_channel =
 284                 adapter->product_info.nchannels + NVIRT_CHAN -1;
 285
 286         adapter->host->max_id = 16;     /* max targets per channel */
 287
 288         adapter->host->max_lun = 7;     /* Up to 7 luns for non disk devices */
 289
 290         adapter->host->cmd_per_lun = max_cmd_per_lun;
 291
 292         adapter->numldrv = inquiry3->num_ldrv;
 293
 294         adapter->max_cmds = adapter->product_info.max_commands;
 295
 296         if(adapter->max_cmds > MAX_COMMANDS)
 297                 adapter->max_cmds = MAX_COMMANDS;
 298
 299         adapter->host->can_queue = adapter->max_cmds - 1;
 300
 301         /*
 302          * Get the maximum number of scatter-gather elements supported by this
 303          * firmware
 304          */
 305         mega_get_max_sgl(adapter);
 306
 307         adapter->host->sg_tablesize = adapter->sglen;
 308
 309         /* use HP firmware and bios version encoding
 310            Note: fw_version[0|1] and bios_version[0|1] were originally shifted
 311            right 8 bits making them zero. This 0 value was hardcoded to fix
 312            sparse warnings. */
 313         if (adapter->product_info.subsysvid == PCI_VENDOR_ID_HP) {
 314                 snprintf(adapter->fw_version, sizeof(adapter->fw_version),
 315                          "%c%d%d.%d%d",
 316                          adapter->product_info.fw_version[2],
 317                          0,
 318                          adapter->product_info.fw_version[1] & 0x0f,
 319                          0,
 320                          adapter->product_info.fw_version[0] & 0x0f);
 321                 snprintf(adapter->bios_version, sizeof(adapter->fw_version),
 322                          "%c%d%d.%d%d",
 323                          adapter->product_info.bios_version[2],
 324                          0,
 325                          adapter->product_info.bios_version[1] & 0x0f,
 326                          0,
 327                          adapter->product_info.bios_version[0] & 0x0f);
 328         } else {
 329                 memcpy(adapter->fw_version,
 330                                 (char *)adapter->product_info.fw_version, 4);
 331                 adapter->fw_version[4] = 0;
 332
 333                 memcpy(adapter->bios_version,
 334                                 (char *)adapter->product_info.bios_version, 4);
 335
 336                 adapter->bios_version[4] = 0;
 337         }
 338
 339         dev_notice(&adapter->dev->dev, "[%s:%s] detected %d logical drives\n",
 340                 adapter->fw_version, adapter->bios_version, adapter->numldrv);
 341
 342         /*
 343          * Do we support extended (>10 bytes) cdbs
 344          */
 345         adapter->support_ext_cdb = mega_support_ext_cdb(adapter);
 346         if (adapter->support_ext_cdb)
 347                 dev_notice(&adapter->dev->dev, "supports extended CDBs\n");
 348
 349
 350         return 0;
 351 }
 352
 353 /**
 354  * mega_runpendq()
 355  * @adapter - pointer to our soft state
 356  *
 357  * Runs through the list of pending requests.
 358  */
 359 static inline void
 360 mega_runpendq(adapter_t *adapter)
 361 {
 362         if(!list_empty(&adapter->pending_list))
 363                 __mega_runpendq(adapter);
 364 }
 365
 366 /*
 367  * megaraid_queue()
 368  * @scmd - Issue this scsi command
 369  * @done - the callback hook into the scsi mid-layer
 370  *
 371  * The command queuing entry point for the mid-layer.
 372  */
 373 static int
 374 megaraid_queue_lck(Scsi_Cmnd *scmd, void (*done)(Scsi_Cmnd *))
 375 {
 376         adapter_t       *adapter;
 377         scb_t   *scb;
 378         int     busy=0;
 379         unsigned long flags;
 380
 381         adapter = (adapter_t *)scmd->device->host->hostdata;
 382
 383         scmd->scsi_done = done;
 384
 385
 386         /*
 387          * Allocate and build a SCB request
 388          * busy flag will be set if mega_build_cmd() command could not
 389          * allocate scb. We will return non-zero status in that case.
 390          * NOTE: scb can be null even though certain commands completed
 391          * successfully, e.g., MODE_SENSE and TEST_UNIT_READY, we would
 392          * return 0 in that case.
 393          */
 394
 395         spin_lock_irqsave(&adapter->lock, flags);
 396         scb = mega_build_cmd(adapter, scmd, &busy);
 397         if (!scb)
 398                 goto out;
 399
 400         scb->state |= SCB_PENDQ;
 401         list_add_tail(&scb->list, &adapter->pending_list);
 402
 403         /*
 404          * Check if the HBA is in quiescent state, e.g., during a
 405          * delete logical drive opertion. If it is, don't run
 406          * the pending_list.
 407          */
 408         if (atomic_read(&adapter->quiescent) == 0)
 409                 mega_runpendq(adapter);
 410
 411         busy = 0;
 412  out:
 413         spin_unlock_irqrestore(&adapter->lock, flags);
 414         return busy;
 415 }
 416
 417 static DEF_SCSI_QCMD(megaraid_queue)
 418
 419 /**
 420  * mega_allocate_scb()
 421  * @adapter - pointer to our soft state
 422  * @cmd - scsi command from the mid-layer
 423  *
 424  * Allocate a SCB structure. This is the central structure for controller
 425  * commands.
 426  */
 427 static inline scb_t *
 428 mega_allocate_scb(adapter_t *adapter, Scsi_Cmnd *cmd)
 429 {
 430         struct list_head *head = &adapter->free_list;
 431         scb_t   *scb;
 432
 433         /* Unlink command from Free List */
 434         if( !list_empty(head) ) {
 435
 436                 scb = list_entry(head->next, scb_t, list);
 437
 438                 list_del_init(head->next);
 439
 440                 scb->state = SCB_ACTIVE;
 441                 scb->cmd = cmd;
 442                 scb->dma_type = MEGA_DMA_TYPE_NONE;
 443
 444                 return scb;
 445         }
 446
 447         return NULL;
 448 }
 449
 450 /**
 451  * mega_get_ldrv_num()
 452  * @adapter - pointer to our soft state
 453  * @cmd - scsi mid layer command
 454  * @channel - channel on the controller
 455  *
 456  * Calculate the logical drive number based on the information in scsi command
 457  * and the channel number.
 458  */
 459 static inline int
 460 mega_get_ldrv_num(adapter_t *adapter, Scsi_Cmnd *cmd, int channel)
 461 {
 462         int             tgt;
 463         int             ldrv_num;
 464
 465         tgt = cmd->device->id;
 466
 467         if ( tgt > adapter->this_id )
 468                 tgt--;  /* we do not get inquires for initiator id */
 469
 470         ldrv_num = (channel * 15) + tgt;
 471
 472
 473         /*
 474          * If we have a logical drive with boot enabled, project it first
 475          */
 476         if( adapter->boot_ldrv_enabled ) {
 477                 if( ldrv_num == 0 ) {
 478                         ldrv_num = adapter->boot_ldrv;
 479                 }
 480                 else {
 481                         if( ldrv_num <= adapter->boot_ldrv ) {
 482                                 ldrv_num--;
 483                         }
 484                 }
 485         }
 486
 487         /*
 488          * If "delete logical drive" feature is enabled on this controller.
 489          * Do only if at least one delete logical drive operation was done.
 490          *
 491          * Also, after logical drive deletion, instead of logical drive number,
 492          * the value returned should be 0x80+logical drive id.
 493          *
 494          * These is valid only for IO commands.
 495          */
 496
 497         if (adapter->support_random_del && adapter->read_ldidmap )
 498                 switch (cmd->cmnd[0]) {
 499                 case READ_6:    /* fall through */
 500                 case WRITE_6:   /* fall through */
 501                 case READ_10:   /* fall through */
 502                 case WRITE_10:
 503                         ldrv_num += 0x80;
 504                 }
 505
 506         return ldrv_num;
 507 }
 508
 509 /**
 510  * mega_build_cmd()
 511  * @adapter - pointer to our soft state
 512  * @cmd - Prepare using this scsi command
 513  * @busy - busy flag if no resources
 514  *
 515  * Prepares a command and scatter gather list for the controller. This routine
 516  * also finds out if the commands is intended for a logical drive or a
 517  * physical device and prepares the controller command accordingly.
 518  *
 519  * We also re-order the logical drives and physical devices based on their
 520  * boot settings.
 521  */
 522 static scb_t *
 523 mega_build_cmd(adapter_t *adapter, Scsi_Cmnd *cmd, int *busy)
 524 {
 525         mega_ext_passthru       *epthru;
 526         mega_passthru   *pthru;
 527         scb_t   *scb;
 528         mbox_t  *mbox;
 529         u32     seg;
 530         char    islogical;
 531         int     max_ldrv_num;
 532         int     channel = 0;
 533         int     target = 0;
 534         int     ldrv_num = 0;   /* logical drive number */
 535
 536         /*
 537          * We know what channels our logical drives are on - mega_find_card()
 538          */
 539         islogical = adapter->logdrv_chan[cmd->device->channel];
 540
 541         /*
 542          * The theory: If physical drive is chosen for boot, all the physical
 543          * devices are exported before the logical drives, otherwise physical
 544          * devices are pushed after logical drives, in which case - Kernel sees
 545          * the physical devices on virtual channel which is obviously converted
 546          * to actual channel on the HBA.
 547          */
 548         if( adapter->boot_pdrv_enabled ) {
 549                 if( islogical ) {
 550                         /* logical channel */
 551                         channel = cmd->device->channel -
 552                                 adapter->product_info.nchannels;
 553                 }
 554                 else {
 555                         /* this is physical channel */
 556                         channel = cmd->device->channel;
 557                         target = cmd->device->id;
 558
 559                         /*
 560                          * boot from a physical disk, that disk needs to be
 561                          * exposed first IF both the channels are SCSI, then
 562                          * booting from the second channel is not allowed.
 563                          */
 564                         if( target == 0 ) {
 565                                 target = adapter->boot_pdrv_tgt;
 566                         }
 567                         else if( target == adapter->boot_pdrv_tgt ) {
 568                                 target = 0;
 569                         }
 570                 }
 571         }
 572         else {
 573                 if( islogical ) {
 574                         /* this is the logical channel */
 575                         channel = cmd->device->channel;
 576                 }
 577                 else {
 578                         /* physical channel */
 579                         channel = cmd->device->channel - NVIRT_CHAN;
 580                         target = cmd->device->id;
 581                 }
 582         }
 583
 584
 585         if(islogical) {
 586
 587                 /* have just LUN 0 for each target on virtual channels */
 588                 if (cmd->device->lun) {
 589                         cmd->result = (DID_BAD_TARGET << 16);
 590                         cmd->scsi_done(cmd);
 591                         return NULL;
 592                 }
 593
 594                 ldrv_num = mega_get_ldrv_num(adapter, cmd, channel);
 595
 596
 597                 max_ldrv_num = (adapter->flag & BOARD_40LD) ?
 598                         MAX_LOGICAL_DRIVES_40LD : MAX_LOGICAL_DRIVES_8LD;
 599
 600                 /*
 601                  * max_ldrv_num increases by 0x80 if some logical drive was
 602                  * deleted.
 603                  */
 604                 if(adapter->read_ldidmap)
 605                         max_ldrv_num += 0x80;
 606
 607                 if(ldrv_num > max_ldrv_num ) {
 608                         cmd->result = (DID_BAD_TARGET << 16);
 609                         cmd->scsi_done(cmd);
 610                         return NULL;
 611                 }
 612
 613         }
 614         else {
 615                 if( cmd->device->lun > 7) {
 616                         /*
 617                          * Do not support lun >7 for physically accessed
 618                          * devices
 619                          */
 620                         cmd->result = (DID_BAD_TARGET << 16);
 621                         cmd->scsi_done(cmd);
 622                         return NULL;
 623                 }
 624         }
 625
 626         /*
 627          *
 628          * Logical drive commands
 629          *
 630          */
 631         if(islogical) {
 632                 switch (cmd->cmnd[0]) {
 633                 case TEST_UNIT_READY:
 634 #if MEGA_HAVE_CLUSTERING
 635                         /*
 636                          * Do we support clustering and is the support enabled
 637                          * If no, return success always
 638                          */
 639                         if( !adapter->has_cluster ) {
 640                                 cmd->result = (DID_OK << 16);
 641                                 cmd->scsi_done(cmd);
 642                                 return NULL;
 643                         }
 644
 645                         if(!(scb = mega_allocate_scb(adapter, cmd))) {
 646                                 *busy = 1;
 647                                 return NULL;
 648                         }
 649
 650                         scb->raw_mbox[0] = MEGA_CLUSTER_CMD;
 651                         scb->raw_mbox[2] = MEGA_RESERVATION_STATUS;
 652                         scb->raw_mbox[3] = ldrv_num;
 653
 654                         scb->dma_direction = PCI_DMA_NONE;
 655
 656                         return scb;
 657 #else
 658                         cmd->result = (DID_OK << 16);
 659                         cmd->scsi_done(cmd);
 660                         return NULL;
 661 #endif
 662
 663                 case MODE_SENSE: {
 664                         char *buf;
 665                         struct scatterlist *sg;
 666
 667                         sg = scsi_sglist(cmd);
 668                         buf = kmap_atomic(sg_page(sg)) + sg->offset;
 669
 670                         memset(buf, 0, cmd->cmnd[4]);
 671                         kunmap_atomic(buf - sg->offset);
 672
 673                         cmd->result = (DID_OK << 16);
 674                         cmd->scsi_done(cmd);
 675                         return NULL;
 676                 }
 677
 678                 case READ_CAPACITY:
 679                 case INQUIRY:
 680
 681                         if(!(adapter->flag & (1L << cmd->device->channel))) {
 682
 683                                 dev_notice(&adapter->dev->dev,
 684                                         "scsi%d: scanning scsi channel %d "
 685                                         "for logical drives\n",
 686                                                 adapter->host->host_no,
 687                                                 cmd->device->channel);
 688
 689                                 adapter->flag |= (1L << cmd->device->channel);
 690                         }
 691
 692                         /* Allocate a SCB and initialize passthru */
 693                         if(!(scb = mega_allocate_scb(adapter, cmd))) {
 694                                 *busy = 1;
 695                                 return NULL;
 696                         }
 697                         pthru = scb->pthru;
 698
 699                         mbox = (mbox_t *)scb->raw_mbox;
 700                         memset(mbox, 0, sizeof(scb->raw_mbox));
 701                         memset(pthru, 0, sizeof(mega_passthru));
 702
 703                         pthru->timeout = 0;
 704                         pthru->ars = 1;
 705                         pthru->reqsenselen = 14;
 706                         pthru->islogical = 1;
 707                         pthru->logdrv = ldrv_num;
 708                         pthru->cdblen = cmd->cmd_len;
 709                         memcpy(pthru->cdb, cmd->cmnd, cmd->cmd_len);
 710
 711                         if( adapter->has_64bit_addr ) {
 712                                 mbox->m_out.cmd = MEGA_MBOXCMD_PASSTHRU64;
 713                         }
 714                         else {
 715                                 mbox->m_out.cmd = MEGA_MBOXCMD_PASSTHRU;
 716                         }
 717
 718                         scb->dma_direction = PCI_DMA_FROMDEVICE;
 719
 720                         pthru->numsgelements = mega_build_sglist(adapter, scb,
 721                                 &pthru->dataxferaddr, &pthru->dataxferlen);
 722
 723                         mbox->m_out.xferaddr = scb->pthru_dma_addr;
 724
 725                         return scb;
 726
 727                 case READ_6:
 728                 case WRITE_6:
 729                 case READ_10:
 730                 case WRITE_10:
 731                 case READ_12:
 732                 case WRITE_12:
 733
 734                         /* Allocate a SCB and initialize mailbox */
 735                         if(!(scb = mega_allocate_scb(adapter, cmd))) {
 736                                 *busy = 1;
 737                                 return NULL;
 738                         }
 739                         mbox = (mbox_t *)scb->raw_mbox;
 740
 741                         memset(mbox, 0, sizeof(scb->raw_mbox));
 742                         mbox->m_out.logdrv = ldrv_num;
 743
 744                         /*
 745                          * A little hack: 2nd bit is zero for all scsi read
 746                          * commands and is set for all scsi write commands
 747                          */
 748                         if( adapter->has_64bit_addr ) {
 749                                 mbox->m_out.cmd = (*cmd->cmnd & 0x02) ?
 750                                         MEGA_MBOXCMD_LWRITE64:
 751                                         MEGA_MBOXCMD_LREAD64 ;
 752                         }
 753                         else {
 754                                 mbox->m_out.cmd = (*cmd->cmnd & 0x02) ?
 755                                         MEGA_MBOXCMD_LWRITE:
 756                                         MEGA_MBOXCMD_LREAD ;
 757                         }
 758
 759                         /*
 760                          * 6-byte READ(0x08) or WRITE(0x0A) cdb
 761                          */
 762                         if( cmd->cmd_len == 6 ) {
 763                                 mbox->m_out.numsectors = (u32) cmd->cmnd[4];
 764                                 mbox->m_out.lba =
 765                                         ((u32)cmd->cmnd[1] << 16) |
 766                                         ((u32)cmd->cmnd[2] << 8) |
 767                                         (u32)cmd->cmnd[3];
 768
 769                                 mbox->m_out.lba &= 0x1FFFFF;
 770
 771 #if MEGA_HAVE_STATS
 772                                 /*
 773                                  * Take modulo 0x80, since the logical drive
 774                                  * number increases by 0x80 when a logical
 775                                  * drive was deleted
 776                                  */
 777                                 if (*cmd->cmnd == READ_6) {
 778                                         adapter->nreads[ldrv_num%0x80]++;
 779                                         adapter->nreadblocks[ldrv_num%0x80] +=
 780                                                 mbox->m_out.numsectors;
 781                                 } else {
 782                                         adapter->nwrites[ldrv_num%0x80]++;
 783                                         adapter->nwriteblocks[ldrv_num%0x80] +=
 784                                                 mbox->m_out.numsectors;
 785                                 }
 786 #endif
 787                         }
 788
 789                         /*
 790                          * 10-byte READ(0x28) or WRITE(0x2A) cdb
 791                          */
 792                         if( cmd->cmd_len == 10 ) {
 793                                 mbox->m_out.numsectors =
 794                                         (u32)cmd->cmnd[8] |
 795                                         ((u32)cmd->cmnd[7] << 8);
 796                                 mbox->m_out.lba =
 797                                         ((u32)cmd->cmnd[2] << 24) |
 798                                         ((u32)cmd->cmnd[3] << 16) |
 799                                         ((u32)cmd->cmnd[4] << 8) |
 800                                         (u32)cmd->cmnd[5];
 801
 802 #if MEGA_HAVE_STATS
 803                                 if (*cmd->cmnd == READ_10) {
 804                                         adapter->nreads[ldrv_num%0x80]++;
 805                                         adapter->nreadblocks[ldrv_num%0x80] +=
 806                                                 mbox->m_out.numsectors;
 807                                 } else {
 808                                         adapter->nwrites[ldrv_num%0x80]++;
 809                                         adapter->nwriteblocks[ldrv_num%0x80] +=
 810                                                 mbox->m_out.numsectors;
 811                                 }
 812 #endif
 813                         }
 814
 815                         /*
 816                          * 12-byte READ(0xA8) or WRITE(0xAA) cdb
 817                          */
 818                         if( cmd->cmd_len == 12 ) {
 819                                 mbox->m_out.lba =
 820                                         ((u32)cmd->cmnd[2] << 24) |
 821                                         ((u32)cmd->cmnd[3] << 16) |
 822                                         ((u32)cmd->cmnd[4] << 8) |
 823                                         (u32)cmd->cmnd[5];
 824
 825                                 mbox->m_out.numsectors =
 826                                         ((u32)cmd->cmnd[6] << 24) |
 827                                         ((u32)cmd->cmnd[7] << 16) |
 828                                         ((u32)cmd->cmnd[8] << 8) |
 829                                         (u32)cmd->cmnd[9];
 830
 831 #if MEGA_HAVE_STATS
 832                                 if (*cmd->cmnd == READ_12) {
 833                                         adapter->nreads[ldrv_num%0x80]++;
 834                                         adapter->nreadblocks[ldrv_num%0x80] +=
 835                                                 mbox->m_out.numsectors;
 836                                 } else {
 837                                         adapter->nwrites[ldrv_num%0x80]++;
 838                                         adapter->nwriteblocks[ldrv_num%0x80] +=
 839                                                 mbox->m_out.numsectors;
 840                                 }
 841 #endif
 842                         }
 843
 844                         /*
 845                          * If it is a read command
 846                          */
 847                         if( (*cmd->cmnd & 0x0F) == 0x08 ) {
 848                                 scb->dma_direction = PCI_DMA_FROMDEVICE;
 849                         }
 850                         else {
 851                                 scb->dma_direction = PCI_DMA_TODEVICE;
 852                         }
 853
 854                         /* Calculate Scatter-Gather info */
 855                         mbox->m_out.numsgelements = mega_build_sglist(adapter, scb,
 856                                         (u32 *)&mbox->m_out.xferaddr, &seg);
 857
 858                         return scb;
 859
 860 #if MEGA_HAVE_CLUSTERING
 861                 case RESERVE:   /* Fall through */
 862                 case RELEASE:
 863
 864                         /*
 865                          * Do we support clustering and is the support enabled
 866                          */
 867                         if( ! adapter->has_cluster ) {
 868
 869                                 cmd->result = (DID_BAD_TARGET << 16);
 870                                 cmd->scsi_done(cmd);
 871                                 return NULL;
 872                         }
 873
 874                         /* Allocate a SCB and initialize mailbox */
 875                         if(!(scb = mega_allocate_scb(adapter, cmd))) {
 876                                 *busy = 1;
 877                                 return NULL;
 878                         }
 879
 880                         scb->raw_mbox[0] = MEGA_CLUSTER_CMD;
 881                         scb->raw_mbox[2] = ( *cmd->cmnd == RESERVE ) ?
 882                                 MEGA_RESERVE_LD : MEGA_RELEASE_LD;
 883
 884                         scb->raw_mbox[3] = ldrv_num;
 885
 886                         scb->dma_direction = PCI_DMA_NONE;
 887
 888                         return scb;
 889 #endif
 890
 891                 default:
 892                         cmd->result = (DID_BAD_TARGET << 16);
 893                         cmd->scsi_done(cmd);
 894                         return NULL;
 895                 }
 896         }
 897
 898         /*
 899          * Passthru drive commands
 900          */
 901         else {
 902                 /* Allocate a SCB and initialize passthru */
 903                 if(!(scb = mega_allocate_scb(adapter, cmd))) {
 904                         *busy = 1;
 905                         return NULL;
 906                 }
 907
 908                 mbox = (mbox_t *)scb->raw_mbox;
 909                 memset(mbox, 0, sizeof(scb->raw_mbox));
 910
 911                 if( adapter->support_ext_cdb ) {
 912
 913                         epthru = mega_prepare_extpassthru(adapter, scb, cmd,
 914                                         channel, target);
 915
 916                         mbox->m_out.cmd = MEGA_MBOXCMD_EXTPTHRU;
 917
 918                         mbox->m_out.xferaddr = scb->epthru_dma_addr;
 919
 920                 }
 921                 else {
 922
 923                         pthru = mega_prepare_passthru(adapter, scb, cmd,
 924                                         channel, target);
 925
 926                         /* Initialize mailbox */
 927                         if( adapter->has_64bit_addr ) {
 928                                 mbox->m_out.cmd = MEGA_MBOXCMD_PASSTHRU64;
 929                         }
 930                         else {
 931                                 mbox->m_out.cmd = MEGA_MBOXCMD_PASSTHRU;
 932                         }
 933
 934                         mbox->m_out.xferaddr = scb->pthru_dma_addr;
 935
 936                 }
 937                 return scb;
 938         }
 939         return NULL;
 940 }
 941
 942
 943 /**
 944  * mega_prepare_passthru()
 945  * @adapter - pointer to our soft state
 946  * @scb - our scsi control block
 947  * @cmd - scsi command from the mid-layer
 948  * @channel - actual channel on the controller
 949  * @target - actual id on the controller.
 950  *
 951  * prepare a command for the scsi physical devices.
 952  */
 953 static mega_passthru *
 954 mega_prepare_passthru(adapter_t *adapter, scb_t *scb, Scsi_Cmnd *cmd,
 955                 int channel, int target)
 956 {
 957         mega_passthru *pthru;
 958
 959         pthru = scb->pthru;
 960         memset(pthru, 0, sizeof (mega_passthru));
 961
 962         /* 0=6sec/1=60sec/2=10min/3=3hrs */
 963         pthru->timeout = 2;
 964
 965         pthru->ars = 1;
 966         pthru->reqsenselen = 14;
 967         pthru->islogical = 0;
 968
 969         pthru->channel = (adapter->flag & BOARD_40LD) ? 0 : channel;
 970
 971         pthru->target = (adapter->flag & BOARD_40LD) ?
 972                 (channel << 4) | target : target;
 973
 974         pthru->cdblen = cmd->cmd_len;
 975         pthru->logdrv = cmd->device->lun;
 976
 977         memcpy(pthru->cdb, cmd->cmnd, cmd->cmd_len);
 978
 979         /* Not sure about the direction */
 980         scb->dma_direction = PCI_DMA_BIDIRECTIONAL;
 981
 982         /* Special Code for Handling READ_CAPA/ INQ using bounce buffers */
 983         switch (cmd->cmnd[0]) {
 984         case INQUIRY:
 985         case READ_CAPACITY:
 986                 if(!(adapter->flag & (1L << cmd->device->channel))) {
 987
 988                         dev_notice(&adapter->dev->dev,
 989                                 "scsi%d: scanning scsi channel %d [P%d] "
 990                                 "for physical devices\n",
 991                                         adapter->host->host_no,
 992                                         cmd->device->channel, channel);
 993
 994                         adapter->flag |= (1L << cmd->device->channel);
 995                 }
 996                 /* Fall through */
 997         default:
 998                 pthru->numsgelements = mega_build_sglist(adapter, scb,
 999                                 &pthru->dataxferaddr, &pthru->dataxferlen);
1000                 break;
1001         }
1002         return pthru;
1003 }
1004
1005
1006 /**
1007  * mega_prepare_extpassthru()
1008  * @adapter - pointer to our soft state
1009  * @scb - our scsi control block
1010  * @cmd - scsi command from the mid-layer
1011  * @channel - actual channel on the controller
1012  * @target - actual id on the controller.
1013  *
1014  * prepare a command for the scsi physical devices. This rountine prepares
1015  * commands for devices which can take extended CDBs (>10 bytes)
1016  */
1017 static mega_ext_passthru *
1018 mega_prepare_extpassthru(adapter_t *adapter, scb_t *scb, Scsi_Cmnd *cmd,
1019                 int channel, int target)
1020 {
1021         mega_ext_passthru       *epthru;
1022
1023         epthru = scb->epthru;
1024         memset(epthru, 0, sizeof(mega_ext_passthru));
1025
1026         /* 0=6sec/1=60sec/2=10min/3=3hrs */
1027         epthru->timeout = 2;
1028
1029         epthru->ars = 1;
1030         epthru->reqsenselen = 14;
1031         epthru->islogical = 0;
1032
1033         epthru->channel = (adapter->flag & BOARD_40LD) ? 0 : channel;
1034         epthru->target = (adapter->flag & BOARD_40LD) ?
1035                 (channel << 4) | target : target;
1036
1037         epthru->cdblen = cmd->cmd_len;
1038         epthru->logdrv = cmd->device->lun;
1039
1040         memcpy(epthru->cdb, cmd->cmnd, cmd->cmd_len);
1041
1042         /* Not sure about the direction */
1043         scb->dma_direction = PCI_DMA_BIDIRECTIONAL;
1044
1045         switch(cmd->cmnd[0]) {
1046         case INQUIRY:
1047         case READ_CAPACITY:
1048                 if(!(adapter->flag & (1L << cmd->device->channel))) {
1049
1050                         dev_notice(&adapter->dev->dev,
1051                                 "scsi%d: scanning scsi channel %d [P%d] "
1052                                 "for physical devices\n",
1053                                         adapter->host->host_no,
1054                                         cmd->device->channel, channel);
1055
1056                         adapter->flag |= (1L << cmd->device->channel);
1057                 }
1058                 /* Fall through */
1059         default:
1060                 epthru->numsgelements = mega_build_sglist(adapter, scb,
1061                                 &epthru->dataxferaddr, &epthru->dataxferlen);
1062                 break;
1063         }
1064
1065         return epthru;
1066 }
1067
1068 static void
1069 __mega_runpendq(adapter_t *adapter)
1070 {
1071         scb_t *scb;
1072         struct list_head *pos, *next;
1073
1074         /* Issue any pending commands to the card */
1075         list_for_each_safe(pos, next, &adapter->pending_list) {
1076
1077                 scb = list_entry(pos, scb_t, list);
1078
1079                 if( !(scb->state & SCB_ISSUED) ) {
1080
1081                         if( issue_scb(adapter, scb) != 0 )
1082                                 return;
1083                 }
1084         }
1085
1086         return;
1087 }
1088
1089
1090 /**
1091  * issue_scb()
1092  * @adapter - pointer to our soft state
1093  * @scb - scsi control block
1094  *
1095  * Post a command to the card if the mailbox is available, otherwise return
1096  * busy. We also take the scb from the pending list if the mailbox is
1097  * available.
1098  */
1099 static int
1100 issue_scb(adapter_t *adapter, scb_t *scb)
1101 {
1102         volatile mbox64_t       *mbox64 = adapter->mbox64;
1103         volatile mbox_t         *mbox = adapter->mbox;
1104         unsigned int    i = 0;
1105
1106         if(unlikely(mbox->m_in.busy)) {
1107                 do {
1108                         udelay(1);
1109                         i++;
1110                 } while( mbox->m_in.busy && (i < max_mbox_busy_wait) );
1111
1112                 if(mbox->m_in.busy) return -1;
1113         }
1114
1115         /* Copy mailbox data into host structure */
1116         memcpy((char *)&mbox->m_out, (char *)scb->raw_mbox,
1117                         sizeof(struct mbox_out));
1118
1119         mbox->m_out.cmdid = scb->idx;   /* Set cmdid */
1120         mbox->m_in.busy = 1;            /* Set busy */
1121
1122
1123         /*
1124          * Increment the pending queue counter
1125          */
1126         atomic_inc(&adapter->pend_cmds);
1127
1128         switch (mbox->m_out.cmd) {
1129         case MEGA_MBOXCMD_LREAD64:
1130         case MEGA_MBOXCMD_LWRITE64:
1131         case MEGA_MBOXCMD_PASSTHRU64:
1132         case MEGA_MBOXCMD_EXTPTHRU:
1133                 mbox64->xfer_segment_lo = mbox->m_out.xferaddr;
1134                 mbox64->xfer_segment_hi = 0;
1135                 mbox->m_out.xferaddr = 0xFFFFFFFF;
1136                 break;
1137         default:
1138                 mbox64->xfer_segment_lo = 0;
1139                 mbox64->xfer_segment_hi = 0;
1140         }
1141
1142         /*
1143          * post the command
1144          */
1145         scb->state |= SCB_ISSUED;
1146
1147         if( likely(adapter->flag & BOARD_MEMMAP) ) {
1148                 mbox->m_in.poll = 0;
1149                 mbox->m_in.ack = 0;
1150                 WRINDOOR(adapter, adapter->mbox_dma | 0x1);
1151         }
1152         else {
1153                 irq_enable(adapter);
1154                 issue_command(adapter);
1155         }
1156
1157         return 0;
1158 }
1159
1160 /*
1161  * Wait until the controller's mailbox is available
1162  */
1163 static inline int
1164 mega_busywait_mbox (adapter_t *adapter)
1165 {
1166         if (adapter->mbox->m_in.busy)
1167                 return __mega_busywait_mbox(adapter);
1168         return 0;
1169 }
1170
1171 /**
1172  * issue_scb_block()
1173  * @adapter - pointer to our soft state
1174  * @raw_mbox - the mailbox
1175  *
1176  * Issue a scb in synchronous and non-interrupt mode
1177  */
1178 static int
1179 issue_scb_block(adapter_t *adapter, u_char *raw_mbox)
1180 {
1181         volatile mbox64_t *mbox64 = adapter->mbox64;
1182         volatile mbox_t *mbox = adapter->mbox;
1183         u8      byte;
1184
1185         /* Wait until mailbox is free */
1186         if(mega_busywait_mbox (adapter))
1187                 goto bug_blocked_mailbox;
1188
1189         /* Copy mailbox data into host structure */
1190         memcpy((char *) mbox, raw_mbox, sizeof(struct mbox_out));
1191         mbox->m_out.cmdid = 0xFE;
1192         mbox->m_in.busy = 1;
1193
1194         switch (raw_mbox[0]) {
1195         case MEGA_MBOXCMD_LREAD64:
1196         case MEGA_MBOXCMD_LWRITE64:
1197         case MEGA_MBOXCMD_PASSTHRU64:
1198         case MEGA_MBOXCMD_EXTPTHRU:
1199                 mbox64->xfer_segment_lo = mbox->m_out.xferaddr;
1200                 mbox64->xfer_segment_hi = 0;
1201                 mbox->m_out.xferaddr = 0xFFFFFFFF;
1202                 break;
1203         default:
1204                 mbox64->xfer_segment_lo = 0;
1205                 mbox64->xfer_segment_hi = 0;
1206         }
1207
1208         if( likely(adapter->flag & BOARD_MEMMAP) ) {
1209                 mbox->m_in.poll = 0;
1210                 mbox->m_in.ack = 0;
1211                 mbox->m_in.numstatus = 0xFF;
1212                 mbox->m_in.status = 0xFF;
1213                 WRINDOOR(adapter, adapter->mbox_dma | 0x1);
1214
1215                 while((volatile u8)mbox->m_in.numstatus == 0xFF)
1216                         cpu_relax();
1217
1218                 mbox->m_in.numstatus = 0xFF;
1219
1220                 while( (volatile u8)mbox->m_in.poll != 0x77 )
1221                         cpu_relax();
1222
1223                 mbox->m_in.poll = 0;
1224                 mbox->m_in.ack = 0x77;
1225
1226                 WRINDOOR(adapter, adapter->mbox_dma | 0x2);
1227
1228                 while(RDINDOOR(adapter) & 0x2)
1229                         cpu_relax();
1230         }
1231         else {
1232                 irq_disable(adapter);
1233                 issue_command(adapter);
1234
1235                 while (!((byte = irq_state(adapter)) & INTR_VALID))
1236                         cpu_relax();
1237
1238                 set_irq_state(adapter, byte);
1239                 irq_enable(adapter);
1240                 irq_ack(adapter);
1241         }
1242
1243         return mbox->m_in.status;
1244
1245 bug_blocked_mailbox:
1246         dev_warn(&adapter->dev->dev, "Blocked mailbox......!!\n");
1247         udelay (1000);
1248         return -1;
1249 }
1250
1251
1252 /**
1253  * megaraid_isr_iomapped()
1254  * @irq - irq
1255  * @devp - pointer to our soft state
1256  *
1257  * Interrupt service routine for io-mapped controllers.
1258  * Find out if our device is interrupting. If yes, acknowledge the interrupt
1259  * and service the completed commands.
1260  */
1261 static irqreturn_t
1262 megaraid_isr_iomapped(int irq, void *devp)
1263 {
1264         adapter_t       *adapter = devp;
1265         unsigned long   flags;
1266         u8      status;
1267         u8      nstatus;
1268         u8      completed[MAX_FIRMWARE_STATUS];
1269         u8      byte;
1270         int     handled = 0;
1271
1272
1273         /*
1274          * loop till F/W has more commands for us to complete.
1275          */
1276         spin_lock_irqsave(&adapter->lock, flags);
1277
1278         do {
1279                 /* Check if a valid interrupt is pending */
1280                 byte = irq_state(adapter);
1281                 if( (byte & VALID_INTR_BYTE) == 0 ) {
1282                         /*
1283                          * No more pending commands
1284                          */
1285                         goto out_unlock;
1286                 }
1287                 set_irq_state(adapter, byte);
1288
1289                 while((nstatus = (volatile u8)adapter->mbox->m_in.numstatus)
1290                                 == 0xFF)
1291                         cpu_relax();
1292                 adapter->mbox->m_in.numstatus = 0xFF;
1293
1294                 status = adapter->mbox->m_in.status;
1295
1296                 /*
1297                  * decrement the pending queue counter
1298                  */
1299                 atomic_sub(nstatus, &adapter->pend_cmds);
1300
1301                 memcpy(completed, (void *)adapter->mbox->m_in.completed,
1302                                 nstatus);
1303
1304                 /* Acknowledge interrupt */
1305                 irq_ack(adapter);
1306
1307                 mega_cmd_done(adapter, completed, nstatus, status);
1308
1309                 mega_rundoneq(adapter);
1310
1311                 handled = 1;
1312
1313                 /* Loop through any pending requests */
1314                 if(atomic_read(&adapter->quiescent) == 0) {
1315                         mega_runpendq(adapter);
1316                 }
1317
1318         } while(1);
1319
1320  out_unlock:
1321
1322         spin_unlock_irqrestore(&adapter->lock, flags);
1323
1324         return IRQ_RETVAL(handled);
1325 }
1326
1327
1328 /**
1329  * megaraid_isr_memmapped()
1330  * @irq - irq
1331  * @devp - pointer to our soft state
1332  *
1333  * Interrupt service routine for memory-mapped controllers.
1334  * Find out if our device is interrupting. If yes, acknowledge the interrupt
1335  * and service the completed commands.
1336  */
1337 static irqreturn_t
1338 megaraid_isr_memmapped(int irq, void *devp)
1339 {
1340         adapter_t       *adapter = devp;
1341         unsigned long   flags;
1342         u8      status;
1343         u32     dword = 0;
1344         u8      nstatus;
1345         u8      completed[MAX_FIRMWARE_STATUS];
1346         int     handled = 0;
1347
1348
1349         /*
1350          * loop till F/W has more commands for us to complete.
1351          */
1352         spin_lock_irqsave(&adapter->lock, flags);
1353
1354         do {
1355                 /* Check if a valid interrupt is pending */
1356                 dword = RDOUTDOOR(adapter);
1357                 if(dword != 0x10001234) {
1358                         /*
1359                          * No more pending commands
1360                          */
1361                         goto out_unlock;
1362                 }
1363                 WROUTDOOR(adapter, 0x10001234);
1364
1365                 while((nstatus = (volatile u8)adapter->mbox->m_in.numstatus)
1366                                 == 0xFF) {
1367                         cpu_relax();
1368                 }
1369                 adapter->mbox->m_in.numstatus = 0xFF;
1370
1371                 status = adapter->mbox->m_in.status;
1372
1373                 /*
1374                  * decrement the pending queue counter
1375                  */
1376                 atomic_sub(nstatus, &adapter->pend_cmds);
1377
1378                 memcpy(completed, (void *)adapter->mbox->m_in.completed,
1379                                 nstatus);
1380
1381                 /* Acknowledge interrupt */
1382                 WRINDOOR(adapter, 0x2);
1383
1384                 handled = 1;
1385
1386                 while( RDINDOOR(adapter) & 0x02 )
1387                         cpu_relax();
1388
1389                 mega_cmd_done(adapter, completed, nstatus, status);
1390
1391                 mega_rundoneq(adapter);
1392
1393                 /* Loop through any pending requests */
1394                 if(atomic_read(&adapter->quiescent) == 0) {
1395                         mega_runpendq(adapter);
1396                 }
1397
1398         } while(1);
1399
1400  out_unlock:
1401
1402         spin_unlock_irqrestore(&adapter->lock, flags);
1403
1404         return IRQ_RETVAL(handled);
1405 }
1406 /**
1407  * mega_cmd_done()
1408  * @adapter - pointer to our soft state
1409  * @completed - array of ids of completed commands
1410  * @nstatus - number of completed commands
1411  * @status - status of the last command completed
1412  *
1413  * Complete the commands and call the scsi mid-layer callback hooks.
1414  */
1415 static void
1416 mega_cmd_done(adapter_t *adapter, u8 completed[], int nstatus, int status)
1417 {
1418         mega_ext_passthru       *epthru = NULL;
1419         struct scatterlist      *sgl;
1420         Scsi_Cmnd       *cmd = NULL;
1421         mega_passthru   *pthru = NULL;
1422         mbox_t  *mbox = NULL;
1423         u8      c;
1424         scb_t   *scb;
1425         int     islogical;
1426         int     cmdid;
1427         int     i;
1428
1429         /*
1430          * for all the commands completed, call the mid-layer callback routine
1431          * and free the scb.
1432          */
1433         for( i = 0; i < nstatus; i++ ) {
1434
1435                 cmdid = completed[i];
1436
1437                 /*
1438                  * Only free SCBs for the commands coming down from the
1439                  * mid-layer, not for which were issued internally
1440                  *
1441                  * For internal command, restore the status returned by the
1442                  * firmware so that user can interpret it.
1443                  */
1444                 if (cmdid == CMDID_INT_CMDS) {
1445                         scb = &adapter->int_scb;
1446
1447                         list_del_init(&scb->list);
1448                         scb->state = SCB_FREE;
1449
1450                         adapter->int_status = status;
1451                         complete(&adapter->int_waitq);
1452                 } else {
1453                         scb = &adapter->scb_list[cmdid];
1454
1455                         /*
1456                          * Make sure f/w has completed a valid command
1457                          */
1458                         if( !(scb->state & SCB_ISSUED) || scb->cmd == NULL ) {
1459                                 dev_crit(&adapter->dev->dev, "invalid command "
1460                                         "Id %d, scb->state:%x, scsi cmd:%p\n",
1461                                         cmdid, scb->state, scb->cmd);
1462
1463                                 continue;
1464                         }
1465
1466                         /*
1467                          * Was a abort issued for this command
1468                          */
1469                         if( scb->state & SCB_ABORT ) {
1470
1471                                 dev_warn(&adapter->dev->dev,
1472                                         "aborted cmd [%x] complete\n",
1473                                         scb->idx);
1474
1475                                 scb->cmd->result = (DID_ABORT << 16);
1476
1477                                 list_add_tail(SCSI_LIST(scb->cmd),
1478                                                 &adapter->completed_list);
1479
1480                                 mega_free_scb(adapter, scb);
1481
1482                                 continue;
1483                         }
1484
1485                         /*
1486                          * Was a reset issued for this command
1487                          */
1488                         if( scb->state & SCB_RESET ) {
1489
1490                                 dev_warn(&adapter->dev->dev,
1491                                         "reset cmd [%x] complete\n",
1492                                         scb->idx);
1493
1494                                 scb->cmd->result = (DID_RESET << 16);
1495
1496                                 list_add_tail(SCSI_LIST(scb->cmd),
1497                                                 &adapter->completed_list);
1498
1499                                 mega_free_scb (adapter, scb);
1500
1501                                 continue;
1502                         }
1503
1504                         cmd = scb->cmd;
1505                         pthru = scb->pthru;
1506                         epthru = scb->epthru;
1507                         mbox = (mbox_t *)scb->raw_mbox;
1508
1509 #if MEGA_HAVE_STATS
1510                         {
1511
1512                         int     logdrv = mbox->m_out.logdrv;
1513
1514                         islogical = adapter->logdrv_chan[cmd->channel];
1515                         /*
1516                          * Maintain an error counter for the logical drive.
1517                          * Some application like SNMP agent need such
1518                          * statistics
1519                          */
1520                         if( status && islogical && (cmd->cmnd[0] == READ_6 ||
1521                                                 cmd->cmnd[0] == READ_10 ||
1522                                                 cmd->cmnd[0] == READ_12)) {
1523                                 /*
1524                                  * Logical drive number increases by 0x80 when
1525                                  * a logical drive is deleted
1526                                  */
1527                                 adapter->rd_errors[logdrv%0x80]++;
1528                         }
1529
1530                         if( status && islogical && (cmd->cmnd[0] == WRITE_6 ||
1531                                                 cmd->cmnd[0] == WRITE_10 ||
1532                                                 cmd->cmnd[0] == WRITE_12)) {
1533                                 /*
1534                                  * Logical drive number increases by 0x80 when
1535                                  * a logical drive is deleted
1536                                  */
1537                                 adapter->wr_errors[logdrv%0x80]++;
1538                         }
1539
1540                         }
1541 #endif
1542                 }
1543
1544                 /*
1545                  * Do not return the presence of hard disk on the channel so,
1546                  * inquiry sent, and returned data==hard disk or removable
1547                  * hard disk and not logical, request should return failure! -
1548                  * PJ
1549                  */
1550                 islogical = adapter->logdrv_chan[cmd->device->channel];
1551                 if( cmd->cmnd[0] == INQUIRY && !islogical ) {
1552
1553                         sgl = scsi_sglist(cmd);
1554                         if( sg_page(sgl) ) {
1555                                 c = *(unsigned char *) sg_virt(&sgl[0]);
1556                         } else {
1557                                 dev_warn(&adapter->dev->dev, "invalid sg\n");
1558                                 c = 0;
1559                         }
1560
1561                         if(IS_RAID_CH(adapter, cmd->device->channel) &&
1562                                         ((c & 0x1F ) == TYPE_DISK)) {
1563                                 status = 0xF0;
1564                         }
1565                 }
1566
1567                 /* clear result; otherwise, success returns corrupt value */
1568                 cmd->result = 0;
1569
1570                 /* Convert MegaRAID status to Linux error code */
1571                 switch (status) {
1572                 case 0x00:      /* SUCCESS , i.e. SCSI_STATUS_GOOD */
1573                         cmd->result |= (DID_OK << 16);
1574                         break;
1575
1576                 case 0x02:      /* ERROR_ABORTED, i.e.
1577                                    SCSI_STATUS_CHECK_CONDITION */
1578
1579                         /* set sense_buffer and result fields */
1580                         if( mbox->m_out.cmd == MEGA_MBOXCMD_PASSTHRU ||
1581                                 mbox->m_out.cmd == MEGA_MBOXCMD_PASSTHRU64 ) {
1582
1583                                 memcpy(cmd->sense_buffer, pthru->reqsensearea,
1584                                                 14);
1585
1586                                 cmd->result = (DRIVER_SENSE << 24) |
1587                                         (DID_OK << 16) |
1588                                         (CHECK_CONDITION << 1);
1589                         }
1590                         else {
1591                                 if (mbox->m_out.cmd == MEGA_MBOXCMD_EXTPTHRU) {
1592
1593                                         memcpy(cmd->sense_buffer,
1594                                                 epthru->reqsensearea, 14);
1595
1596                                         cmd->result = (DRIVER_SENSE << 24) |
1597                                                 (DID_OK << 16) |
1598                                                 (CHECK_CONDITION << 1);
1599                                 } else {
1600                                         cmd->sense_buffer[0] = 0x70;
1601                                         cmd->sense_buffer[2] = ABORTED_COMMAND;
1602                                         cmd->result |= (CHECK_CONDITION << 1);
1603                                 }
1604                         }
1605                         break;
1606
1607                 case 0x08:      /* ERR_DEST_DRIVE_FAILED, i.e.
1608                                    SCSI_STATUS_BUSY */
1609                         cmd->result |= (DID_BUS_BUSY << 16) | status;
1610                         break;
1611
1612                 default:
1613 #if MEGA_HAVE_CLUSTERING
1614                         /*
1615                          * If TEST_UNIT_READY fails, we know
1616                          * MEGA_RESERVATION_STATUS failed
1617                          */
1618                         if( cmd->cmnd[0] == TEST_UNIT_READY ) {
1619                                 cmd->result |= (DID_ERROR << 16) |
1620                                         (RESERVATION_CONFLICT << 1);
1621                         }
1622                         else
1623                         /*
1624                          * Error code returned is 1 if Reserve or Release
1625                          * failed or the input parameter is invalid
1626                          */
1627                         if( status == 1 &&
1628                                 (cmd->cmnd[0] == RESERVE ||
1629                                          cmd->cmnd[0] == RELEASE) ) {
1630
1631                                 cmd->result |= (DID_ERROR << 16) |
1632                                         (RESERVATION_CONFLICT << 1);
1633                         }
1634                         else
1635 #endif
1636                                 cmd->result |= (DID_BAD_TARGET << 16)|status;
1637                 }
1638
1639                 mega_free_scb(adapter, scb);
1640
1641                 /* Add Scsi_Command to end of completed queue */
1642                 list_add_tail(SCSI_LIST(cmd), &adapter->completed_list);
1643         }
1644 }
1645
1646
1647 /*
1648  * mega_runpendq()
1649  *
1650  * Run through the list of completed requests and finish it
1651  */
1652 static void
1653 mega_rundoneq (adapter_t *adapter)
1654 {
1655         Scsi_Cmnd *cmd;
1656         struct list_head *pos;
1657
1658         list_for_each(pos, &adapter->completed_list) {
1659
1660                 struct scsi_pointer* spos = (struct scsi_pointer *)pos;
1661
1662                 cmd = list_entry(spos, Scsi_Cmnd, SCp);
1663                 cmd->scsi_done(cmd);
1664         }
1665
1666         INIT_LIST_HEAD(&adapter->completed_list);
1667 }
1668
1669
1670 /*
1671  * Free a SCB structure
1672  * Note: We assume the scsi commands associated with this scb is not free yet.
1673  */
1674 static void
1675 mega_free_scb(adapter_t *adapter, scb_t *scb)
1676 {
1677         switch( scb->dma_type ) {
1678
1679         case MEGA_DMA_TYPE_NONE:
1680                 break;
1681
1682         case MEGA_SGLIST:
1683                 scsi_dma_unmap(scb->cmd);
1684                 break;
1685         default:
1686                 break;
1687         }
1688
1689         /*
1690          * Remove from the pending list
1691          */
1692         list_del_init(&scb->list);
1693
1694         /* Link the scb back into free list */
1695         scb->state = SCB_FREE;
1696         scb->cmd = NULL;
1697
1698         list_add(&scb->list, &adapter->free_list);
1699 }
1700
1701
1702 static int
1703 __mega_busywait_mbox (adapter_t *adapter)
1704 {
1705         volatile mbox_t *mbox = adapter->mbox;
1706         long counter;
1707
1708         for (counter = 0; counter < 10000; counter++) {
1709                 if (!mbox->m_in.busy)
1710                         return 0;
1711                 udelay(100);
1712                 cond_resched();
1713         }
1714         return -1;              /* give up after 1 second */
1715 }
1716
1717 /*
1718  * Copies data to SGLIST
1719  * Note: For 64 bit cards, we need a minimum of one SG element for read/write
1720  */
1721 static int
1722 mega_build_sglist(adapter_t *adapter, scb_t *scb, u32 *buf, u32 *len)
1723 {
1724         struct scatterlist *sg;
1725         Scsi_Cmnd       *cmd;
1726         int     sgcnt;
1727         int     idx;
1728
1729         cmd = scb->cmd;
1730
1731         /*
1732          * Copy Scatter-Gather list info into controller structure.
1733          *
1734          * The number of sg elements returned must not exceed our limit
1735          */
1736         sgcnt = scsi_dma_map(cmd);
1737
1738         scb->dma_type = MEGA_SGLIST;
1739
1740         BUG_ON(sgcnt > adapter->sglen || sgcnt < 0);
1741
1742         *len = 0;
1743
1744         if (scsi_sg_count(cmd) == 1 && !adapter->has_64bit_addr) {
1745                 sg = scsi_sglist(cmd);
1746                 scb->dma_h_bulkdata = sg_dma_address(sg);
1747                 *buf = (u32)scb->dma_h_bulkdata;
1748                 *len = sg_dma_len(sg);
1749                 return 0;
1750         }
1751
1752         scsi_for_each_sg(cmd, sg, sgcnt, idx) {
1753                 if (adapter->has_64bit_addr) {
1754                         scb->sgl64[idx].address = sg_dma_address(sg);
1755                         *len += scb->sgl64[idx].length = sg_dma_len(sg);
1756                 } else {
1757                         scb->sgl[idx].address = sg_dma_address(sg);
1758                         *len += scb->sgl[idx].length = sg_dma_len(sg);
1759                 }
1760         }
1761
1762         /* Reset pointer and length fields */
1763         *buf = scb->sgl_dma_addr;
1764
1765         /* Return count of SG requests */
1766         return sgcnt;
1767 }
1768
1769
1770 /*
1771  * mega_8_to_40ld()
1772  *
1773  * takes all info in AdapterInquiry structure and puts it into ProductInfo and
1774  * Enquiry3 structures for later use
1775  */
1776 static void
1777 mega_8_to_40ld(mraid_inquiry *inquiry, mega_inquiry3 *enquiry3,
1778                 mega_product_info *product_info)
1779 {
1780         int i;
1781
1782         product_info->max_commands = inquiry->adapter_info.max_commands;
1783         enquiry3->rebuild_rate = inquiry->adapter_info.rebuild_rate;
1784         product_info->nchannels = inquiry->adapter_info.nchannels;
1785
1786         for (i = 0; i < 4; i++) {
1787                 product_info->fw_version[i] =
1788                         inquiry->adapter_info.fw_version[i];
1789
1790                 product_info->bios_version[i] =
1791                         inquiry->adapter_info.bios_version[i];
1792         }
1793         enquiry3->cache_flush_interval =
1794                 inquiry->adapter_info.cache_flush_interval;
1795
1796         product_info->dram_size = inquiry->adapter_info.dram_size;
1797
1798         enquiry3->num_ldrv = inquiry->logdrv_info.num_ldrv;
1799
1800         for (i = 0; i < MAX_LOGICAL_DRIVES_8LD; i++) {
1801                 enquiry3->ldrv_size[i] = inquiry->logdrv_info.ldrv_size[i];
1802                 enquiry3->ldrv_prop[i] = inquiry->logdrv_info.ldrv_prop[i];
1803                 enquiry3->ldrv_state[i] = inquiry->logdrv_info.ldrv_state[i];
1804         }
1805
1806         for (i = 0; i < (MAX_PHYSICAL_DRIVES); i++)
1807                 enquiry3->pdrv_state[i] = inquiry->pdrv_info.pdrv_state[i];
1808 }
1809
1810 static inline void
1811 mega_free_sgl(adapter_t *adapter)
1812 {
1813         scb_t   *scb;
1814         int     i;
1815
1816         for(i = 0; i < adapter->max_cmds; i++) {
1817
1818                 scb = &adapter->scb_list[i];
1819
1820                 if( scb->sgl64 ) {
1821                         pci_free_consistent(adapter->dev,
1822                                 sizeof(mega_sgl64) * adapter->sglen,
1823                                 scb->sgl64,
1824                                 scb->sgl_dma_addr);
1825
1826                         scb->sgl64 = NULL;
1827                 }
1828
1829                 if( scb->pthru ) {
1830                         pci_free_consistent(adapter->dev, sizeof(mega_passthru),
1831                                 scb->pthru, scb->pthru_dma_addr);
1832
1833                         scb->pthru = NULL;
1834                 }
1835
1836                 if( scb->epthru ) {
1837                         pci_free_consistent(adapter->dev,
1838                                 sizeof(mega_ext_passthru),
1839                                 scb->epthru, scb->epthru_dma_addr);
1840
1841                         scb->epthru = NULL;
1842                 }
1843
1844         }
1845 }
1846
1847
1848 /*
1849  * Get information about the card/driver
1850  */
1851 const char *
1852 megaraid_info(struct Scsi_Host *host)
1853 {
1854         static char buffer[512];
1855         adapter_t *adapter;
1856
1857         adapter = (adapter_t *)host->hostdata;
1858
1859         sprintf (buffer,
1860                  "LSI Logic MegaRAID %s %d commands %d targs %d chans %d luns",
1861                  adapter->fw_version, adapter->product_info.max_commands,
1862                  adapter->host->max_id, adapter->host->max_channel,
1863                  (u32)adapter->host->max_lun);
1864         return buffer;
1865 }
1866
1867 /*
1868  * Abort a previous SCSI request. Only commands on the pending list can be
1869  * aborted. All the commands issued to the F/W must complete.
1870  */
1871 static int
1872 megaraid_abort(Scsi_Cmnd *cmd)
1873 {
1874         adapter_t       *adapter;
1875         int             rval;
1876
1877         adapter = (adapter_t *)cmd->device->host->hostdata;
1878
1879         rval =  megaraid_abort_and_reset(adapter, cmd, SCB_ABORT);
1880
1881         /*
1882          * This is required here to complete any completed requests
1883          * to be communicated over to the mid layer.
1884          */
1885         mega_rundoneq(adapter);
1886
1887         return rval;
1888 }
1889
1890
1891 static int
1892 megaraid_reset(struct scsi_cmnd *cmd)
1893 {
1894         adapter_t       *adapter;
1895         megacmd_t       mc;
1896         int             rval;
1897
1898         adapter = (adapter_t *)cmd->device->host->hostdata;
1899
1900 #if MEGA_HAVE_CLUSTERING
1901         mc.cmd = MEGA_CLUSTER_CMD;
1902         mc.opcode = MEGA_RESET_RESERVATIONS;
1903
1904         if( mega_internal_command(adapter, &mc, NULL) != 0 ) {
1905                 dev_warn(&adapter->dev->dev, "reservation reset failed\n");
1906         }
1907         else {
1908                 dev_info(&adapter->dev->dev, "reservation reset\n");
1909         }
1910 #endif
1911
1912         spin_lock_irq(&adapter->lock);
1913
1914         rval =  megaraid_abort_and_reset(adapter, cmd, SCB_RESET);
1915
1916         /*
1917          * This is required here to complete any completed requests
1918          * to be communicated over to the mid layer.
1919          */
1920         mega_rundoneq(adapter);
1921         spin_unlock_irq(&adapter->lock);
1922
1923         return rval;
1924 }
1925
1926 /**
1927  * megaraid_abort_and_reset()
1928  * @adapter - megaraid soft state
1929  * @cmd - scsi command to be aborted or reset
1930  * @aor - abort or reset flag
1931  *
1932  * Try to locate the scsi command in the pending queue. If found and is not
1933  * issued to the controller, abort/reset it. Otherwise return failure
1934  */
1935 static int
1936 megaraid_abort_and_reset(adapter_t *adapter, Scsi_Cmnd *cmd, int aor)
1937 {
1938         struct list_head        *pos, *next;
1939         scb_t                   *scb;
1940
1941         dev_warn(&adapter->dev->dev, "%s cmd=%x <c=%d t=%d l=%d>\n",
1942              (aor == SCB_ABORT)? "ABORTING":"RESET",
1943              cmd->cmnd[0], cmd->device->channel,
1944              cmd->device->id, (u32)cmd->device->lun);
1945
1946         if(list_empty(&adapter->pending_list))
1947                 return FAILED;
1948
1949         list_for_each_safe(pos, next, &adapter->pending_list) {
1950
1951                 scb = list_entry(pos, scb_t, list);
1952
1953                 if (scb->cmd == cmd) { /* Found command */
1954
1955                         scb->state |= aor;
1956
1957                         /*
1958                          * Check if this command has firmware ownership. If
1959                          * yes, we cannot reset this command. Whenever f/w
1960                          * completes this command, we will return appropriate
1961                          * status from ISR.
1962                          */
1963                         if( scb->state & SCB_ISSUED ) {
1964
1965                                 dev_warn(&adapter->dev->dev,
1966                                         "%s[%x], fw owner\n",
1967                                         (aor==SCB_ABORT) ? "ABORTING":"RESET",
1968                                         scb->idx);
1969
1970                                 return FAILED;
1971                         }
1972                         else {
1973
1974                                 /*
1975                                  * Not yet issued! Remove from the pending
1976                                  * list
1977                                  */
1978                                 dev_warn(&adapter->dev->dev,
1979                                         "%s-[%x], driver owner\n",
1980                                         (aor==SCB_ABORT) ? "ABORTING":"RESET",
1981                                         scb->idx);
1982
1983                                 mega_free_scb(adapter, scb);
1984
1985                                 if( aor == SCB_ABORT ) {
1986                                         cmd->result = (DID_ABORT << 16);
1987                                 }
1988                                 else {
1989                                         cmd->result = (DID_RESET << 16);
1990                                 }
1991
1992                                 list_add_tail(SCSI_LIST(cmd),
1993                                                 &adapter->completed_list);
1994
1995                                 return SUCCESS;
1996                         }
1997                 }
1998         }
1999
2000         return FAILED;
2001 }
2002
2003 static inline int
2004 make_local_pdev(adapter_t *adapter, struct pci_dev **pdev)
2005 {
2006         *pdev = pci_alloc_dev(NULL);
2007
2008         if( *pdev == NULL ) return -1;
2009
2010         memcpy(*pdev, adapter->dev, sizeof(struct pci_dev));
2011
2012         if( pci_set_dma_mask(*pdev, DMA_BIT_MASK(32)) != 0 ) {
2013                 kfree(*pdev);
2014                 return -1;
2015         }
2016
2017         return 0;
2018 }
2019
2020 static inline void
2021 free_local_pdev(struct pci_dev *pdev)
2022 {
2023         kfree(pdev);
2024 }
2025
2026 /**
2027  * mega_allocate_inquiry()
2028  * @dma_handle - handle returned for dma address
2029  * @pdev - handle to pci device
2030  *
2031  * allocates memory for inquiry structure
2032  */
2033 static inline void *
2034 mega_allocate_inquiry(dma_addr_t *dma_handle, struct pci_dev *pdev)
2035 {
2036         return pci_alloc_consistent(pdev, sizeof(mega_inquiry3), dma_handle);
2037 }
2038
2039
2040 static inline void
2041 mega_free_inquiry(void *inquiry, dma_addr_t dma_handle, struct pci_dev *pdev)
2042 {
2043         pci_free_consistent(pdev, sizeof(mega_inquiry3), inquiry, dma_handle);
2044 }
2045
2046
2047 #ifdef CONFIG_PROC_FS
2048 /* Following code handles /proc fs  */
2049
2050 /**
2051  * proc_show_config()
2052  * @m - Synthetic file construction data
2053  * @v - File iterator
2054  *
2055  * Display configuration information about the controller.
2056  */
2057 static int
2058 proc_show_config(struct seq_file *m, void *v)
2059 {
2060
2061         adapter_t *adapter = m->private;
2062
2063         seq_puts(m, MEGARAID_VERSION);
2064         if(adapter->product_info.product_name[0])
2065                 seq_printf(m, "%s\n", adapter->product_info.product_name);
2066
2067         seq_puts(m, "Controller Type: ");
2068
2069         if( adapter->flag & BOARD_MEMMAP )
2070                 seq_puts(m, "438/466/467/471/493/518/520/531/532\n");
2071         else
2072                 seq_puts(m, "418/428/434\n");
2073
2074         if(adapter->flag & BOARD_40LD)
2075                 seq_puts(m, "Controller Supports 40 Logical Drives\n");
2076
2077         if(adapter->flag & BOARD_64BIT)
2078                 seq_puts(m, "Controller capable of 64-bit memory addressing\n");
2079         if( adapter->has_64bit_addr )
2080                 seq_puts(m, "Controller using 64-bit memory addressing\n");
2081         else
2082                 seq_puts(m, "Controller is not using 64-bit memory addressing\n");
2083
2084         seq_printf(m, "Base = %08lx, Irq = %d, ",
2085                    adapter->base, adapter->host->irq);
2086
2087         seq_printf(m, "Logical Drives = %d, Channels = %d\n",
2088                    adapter->numldrv, adapter->product_info.nchannels);
2089
2090         seq_printf(m, "Version =%s:%s, DRAM = %dMb\n",
2091                    adapter->fw_version, adapter->bios_version,
2092                    adapter->product_info.dram_size);
2093
2094         seq_printf(m, "Controller Queue Depth = %d, Driver Queue Depth = %d\n",
2095                    adapter->product_info.max_commands, adapter->max_cmds);
2096
2097         seq_printf(m, "support_ext_cdb    = %d\n", adapter->support_ext_cdb);
2098         seq_printf(m, "support_random_del = %d\n", adapter->support_random_del);
2099         seq_printf(m, "boot_ldrv_enabled  = %d\n", adapter->boot_ldrv_enabled);
2100         seq_printf(m, "boot_ldrv          = %d\n", adapter->boot_ldrv);
2101         seq_printf(m, "boot_pdrv_enabled  = %d\n", adapter->boot_pdrv_enabled);
2102         seq_printf(m, "boot_pdrv_ch       = %d\n", adapter->boot_pdrv_ch);
2103         seq_printf(m, "boot_pdrv_tgt      = %d\n", adapter->boot_pdrv_tgt);
2104         seq_printf(m, "quiescent          = %d\n",
2105                    atomic_read(&adapter->quiescent));
2106         seq_printf(m, "has_cluster        = %d\n", adapter->has_cluster);
2107
2108         seq_puts(m, "\nModule Parameters:\n");
2109         seq_printf(m, "max_cmd_per_lun    = %d\n", max_cmd_per_lun);
2110         seq_printf(m, "max_sectors_per_io = %d\n", max_sectors_per_io);
2111         return 0;
2112 }
2113
2114 /**
2115  * proc_show_stat()
2116  * @m - Synthetic file construction data
2117  * @v - File iterator
2118  *
2119  * Display statistical information about the I/O activity.
2120  */
2121 static int
2122 proc_show_stat(struct seq_file *m, void *v)
2123 {
2124         adapter_t *adapter = m->private;
2125 #if MEGA_HAVE_STATS
2126         int     i;
2127 #endif
2128
2129         seq_puts(m, "Statistical Information for this controller\n");
2130         seq_printf(m, "pend_cmds = %d\n", atomic_read(&adapter->pend_cmds));
2131 #if MEGA_HAVE_STATS
2132         for(i = 0; i < adapter->numldrv; i++) {
2133                 seq_printf(m, "Logical Drive %d:\n", i);
2134                 seq_printf(m, "\tReads Issued = %lu, Writes Issued = %lu\n",
2135                            adapter->nreads[i], adapter->nwrites[i]);
2136                 seq_printf(m, "\tSectors Read = %lu, Sectors Written = %lu\n",
2137                            adapter->nreadblocks[i], adapter->nwriteblocks[i]);
2138                 seq_printf(m, "\tRead errors = %lu, Write errors = %lu\n\n",
2139                            adapter->rd_errors[i], adapter->wr_errors[i]);
2140         }
2141 #else
2142         seq_puts(m, "IO and error counters not compiled in driver.\n");
2143 #endif
2144         return 0;
2145 }
2146
2147
2148 /**
2149  * proc_show_mbox()
2150  * @m - Synthetic file construction data
2151  * @v - File iterator
2152  *
2153  * Display mailbox information for the last command issued. This information
2154  * is good for debugging.
2155  */
2156 static int
2157 proc_show_mbox(struct seq_file *m, void *v)
2158 {
2159         adapter_t       *adapter = m->private;
2160         volatile mbox_t *mbox = adapter->mbox;
2161
2162         seq_puts(m, "Contents of Mail Box Structure\n");
2163         seq_printf(m, "  Fw Command   = 0x%02x\n", mbox->m_out.cmd);
2164         seq_printf(m, "  Cmd Sequence = 0x%02x\n", mbox->m_out.cmdid);
2165         seq_printf(m, "  No of Sectors= %04d\n", mbox->m_out.numsectors);
2166         seq_printf(m, "  LBA          = 0x%02x\n", mbox->m_out.lba);
2167         seq_printf(m, "  DTA          = 0x%08x\n", mbox->m_out.xferaddr);
2168         seq_printf(m, "  Logical Drive= 0x%02x\n", mbox->m_out.logdrv);
2169         seq_printf(m, "  No of SG Elmt= 0x%02x\n", mbox->m_out.numsgelements);
2170         seq_printf(m, "  Busy         = %01x\n", mbox->m_in.busy);
2171         seq_printf(m, "  Status       = 0x%02x\n", mbox->m_in.status);
2172         return 0;
2173 }
2174
2175
2176 /**
2177  * proc_show_rebuild_rate()
2178  * @m - Synthetic file construction data
2179  * @v - File iterator
2180  *
2181  * Display current rebuild rate
2182  */
2183 static int
2184 proc_show_rebuild_rate(struct seq_file *m, void *v)
2185 {
2186         adapter_t       *adapter = m->private;
2187         dma_addr_t      dma_handle;
2188         caddr_t         inquiry;
2189         struct pci_dev  *pdev;
2190
2191         if( make_local_pdev(adapter, &pdev) != 0 )
2192                 return 0;
2193
2194         if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL )
2195                 goto free_pdev;
2196
2197         if( mega_adapinq(adapter, dma_handle) != 0 ) {
2198                 seq_puts(m, "Adapter inquiry failed.\n");
2199                 dev_warn(&adapter->dev->dev, "inquiry failed\n");
2200                 goto free_inquiry;
2201         }
2202
2203         if( adapter->flag & BOARD_40LD )
2204                 seq_printf(m, "Rebuild Rate: [%d%%]\n",
2205                            ((mega_inquiry3 *)inquiry)->rebuild_rate);
2206         else
2207                 seq_printf(m, "Rebuild Rate: [%d%%]\n",
2208                         ((mraid_ext_inquiry *)
2209                          inquiry)->raid_inq.adapter_info.rebuild_rate);
2210
2211 free_inquiry:
2212         mega_free_inquiry(inquiry, dma_handle, pdev);
2213 free_pdev:
2214         free_local_pdev(pdev);
2215         return 0;
2216 }
2217
2218
2219 /**
2220  * proc_show_battery()
2221  * @m - Synthetic file construction data
2222  * @v - File iterator
2223  *
2224  * Display information about the battery module on the controller.
2225  */
2226 static int
2227 proc_show_battery(struct seq_file *m, void *v)
2228 {
2229         adapter_t       *adapter = m->private;
2230         dma_addr_t      dma_handle;
2231         caddr_t         inquiry;
2232         struct pci_dev  *pdev;
2233         u8      battery_status;
2234
2235         if( make_local_pdev(adapter, &pdev) != 0 )
2236                 return 0;
2237
2238         if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL )
2239                 goto free_pdev;
2240
2241         if( mega_adapinq(adapter, dma_handle) != 0 ) {
2242                 seq_puts(m, "Adapter inquiry failed.\n");
2243                 dev_warn(&adapter->dev->dev, "inquiry failed\n");
2244                 goto free_inquiry;
2245         }
2246
2247         if( adapter->flag & BOARD_40LD ) {
2248                 battery_status = ((mega_inquiry3 *)inquiry)->battery_status;
2249         }
2250         else {
2251                 battery_status = ((mraid_ext_inquiry *)inquiry)->
2252                         raid_inq.adapter_info.battery_status;
2253         }
2254
2255         /*
2256          * Decode the battery status
2257          */
2258         seq_printf(m, "Battery Status:[%d]", battery_status);
2259
2260         if(battery_status == MEGA_BATT_CHARGE_DONE)
2261                 seq_puts(m, " Charge Done");
2262
2263         if(battery_status & MEGA_BATT_MODULE_MISSING)
2264                 seq_puts(m, " Module Missing");
2265
2266         if(battery_status & MEGA_BATT_LOW_VOLTAGE)
2267                 seq_puts(m, " Low Voltage");
2268
2269         if(battery_status & MEGA_BATT_TEMP_HIGH)
2270                 seq_puts(m, " Temperature High");
2271
2272         if(battery_status & MEGA_BATT_PACK_MISSING)
2273                 seq_puts(m, " Pack Missing");
2274
2275         if(battery_status & MEGA_BATT_CHARGE_INPROG)
2276                 seq_puts(m, " Charge In-progress");
2277
2278         if(battery_status & MEGA_BATT_CHARGE_FAIL)
2279                 seq_puts(m, " Charge Fail");
2280
2281         if(battery_status & MEGA_BATT_CYCLES_EXCEEDED)
2282                 seq_puts(m, " Cycles Exceeded");
2283
2284         seq_putc(m, '\n');
2285
2286 free_inquiry:
2287         mega_free_inquiry(inquiry, dma_handle, pdev);
2288 free_pdev:
2289         free_local_pdev(pdev);
2290         return 0;
2291 }
2292
2293
2294 /*
2295  * Display scsi inquiry
2296  */
2297 static void
2298 mega_print_inquiry(struct seq_file *m, char *scsi_inq)
2299 {
2300         int     i;
2301
2302         seq_puts(m, "  Vendor: ");
2303         seq_write(m, scsi_inq + 8, 8);
2304         seq_puts(m, "  Model: ");
2305         seq_write(m, scsi_inq + 16, 16);
2306         seq_puts(m, "  Rev: ");
2307         seq_write(m, scsi_inq + 32, 4);
2308         seq_putc(m, '\n');
2309
2310         i = scsi_inq[0] & 0x1f;
2311         seq_printf(m, "  Type:   %s ", scsi_device_type(i));
2312
2313         seq_printf(m, "                 ANSI SCSI revision: %02x",
2314                    scsi_inq[2] & 0x07);
2315
2316         if( (scsi_inq[2] & 0x07) == 1 && (scsi_inq[3] & 0x0f) == 1 )
2317                 seq_puts(m, " CCS\n");
2318         else
2319                 seq_putc(m, '\n');
2320 }
2321
2322 /**
2323  * proc_show_pdrv()
2324  * @m - Synthetic file construction data
2325  * @page - buffer to write the data in
2326  * @adapter - pointer to our soft state
2327  *
2328  * Display information about the physical drives.
2329  */
2330 static int
2331 proc_show_pdrv(struct seq_file *m, adapter_t *adapter, int channel)
2332 {
2333         dma_addr_t      dma_handle;
2334         char            *scsi_inq;
2335         dma_addr_t      scsi_inq_dma_handle;
2336         caddr_t         inquiry;
2337         struct pci_dev  *pdev;
2338         u8      *pdrv_state;
2339         u8      state;
2340         int     tgt;
2341         int     max_channels;
2342         int     i;
2343
2344         if( make_local_pdev(adapter, &pdev) != 0 )
2345                 return 0;
2346
2347         if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL )
2348                 goto free_pdev;
2349
2350         if( mega_adapinq(adapter, dma_handle) != 0 ) {
2351                 seq_puts(m, "Adapter inquiry failed.\n");
2352                 dev_warn(&adapter->dev->dev, "inquiry failed\n");
2353                 goto free_inquiry;
2354         }
2355
2356
2357         scsi_inq = pci_alloc_consistent(pdev, 256, &scsi_inq_dma_handle);
2358         if( scsi_inq == NULL ) {
2359                 seq_puts(m, "memory not available for scsi inq.\n");
2360                 goto free_inquiry;
2361         }
2362
2363         if( adapter->flag & BOARD_40LD ) {
2364                 pdrv_state = ((mega_inquiry3 *)inquiry)->pdrv_state;
2365         }
2366         else {
2367                 pdrv_state = ((mraid_ext_inquiry *)inquiry)->
2368                         raid_inq.pdrv_info.pdrv_state;
2369         }
2370
2371         max_channels = adapter->product_info.nchannels;
2372
2373         if( channel >= max_channels ) {
2374                 goto free_pci;
2375         }
2376
2377         for( tgt = 0; tgt <= MAX_TARGET; tgt++ ) {
2378
2379                 i = channel*16 + tgt;
2380
2381                 state = *(pdrv_state + i);
2382                 switch( state & 0x0F ) {
2383                 case PDRV_ONLINE:
2384                         seq_printf(m, "Channel:%2d Id:%2d State: Online",
2385                                    channel, tgt);
2386                         break;
2387
2388                 case PDRV_FAILED:
2389                         seq_printf(m, "Channel:%2d Id:%2d State: Failed",
2390                                    channel, tgt);
2391                         break;
2392
2393                 case PDRV_RBLD:
2394                         seq_printf(m, "Channel:%2d Id:%2d State: Rebuild",
2395                                    channel, tgt);
2396                         break;
2397
2398                 case PDRV_HOTSPARE:
2399                         seq_printf(m, "Channel:%2d Id:%2d State: Hot spare",
2400                                    channel, tgt);
2401                         break;
2402
2403                 default:
2404                         seq_printf(m, "Channel:%2d Id:%2d State: Un-configured",
2405                                    channel, tgt);
2406                         break;
2407                 }
2408
2409                 /*
2410                  * This interface displays inquiries for disk drives
2411                  * only. Inquries for logical drives and non-disk
2412                  * devices are available through /proc/scsi/scsi
2413                  */
2414                 memset(scsi_inq, 0, 256);
2415                 if( mega_internal_dev_inquiry(adapter, channel, tgt,
2416                                 scsi_inq_dma_handle) ||
2417                                 (scsi_inq[0] & 0x1F) != TYPE_DISK ) {
2418                         continue;
2419                 }
2420
2421                 /*
2422                  * Check for overflow. We print less than 240
2423                  * characters for inquiry
2424                  */
2425                 seq_puts(m, ".\n");
2426                 mega_print_inquiry(m, scsi_inq);
2427         }
2428
2429 free_pci:
2430         pci_free_consistent(pdev, 256, scsi_inq, scsi_inq_dma_handle);
2431 free_inquiry:
2432         mega_free_inquiry(inquiry, dma_handle, pdev);
2433 free_pdev:
2434         free_local_pdev(pdev);
2435         return 0;
2436 }
2437
2438 /**
2439  * proc_show_pdrv_ch0()
2440  * @m - Synthetic file construction data
2441  * @v - File iterator
2442  *
2443  * Display information about the physical drives on physical channel 0.
2444  */
2445 static int
2446 proc_show_pdrv_ch0(struct seq_file *m, void *v)
2447 {
2448         return proc_show_pdrv(m, m->private, 0);
2449 }
2450
2451
2452 /**
2453  * proc_show_pdrv_ch1()
2454  * @m - Synthetic file construction data
2455  * @v - File iterator
2456  *
2457  * Display information about the physical drives on physical channel 1.
2458  */
2459 static int
2460 proc_show_pdrv_ch1(struct seq_file *m, void *v)
2461 {
2462         return proc_show_pdrv(m, m->private, 1);
2463 }
2464
2465
2466 /**
2467  * proc_show_pdrv_ch2()
2468  * @m - Synthetic file construction data
2469  * @v - File iterator
2470  *
2471  * Display information about the physical drives on physical channel 2.
2472  */
2473 static int
2474 proc_show_pdrv_ch2(struct seq_file *m, void *v)
2475 {
2476         return proc_show_pdrv(m, m->private, 2);
2477 }
2478
2479
2480 /**
2481  * proc_show_pdrv_ch3()
2482  * @m - Synthetic file construction data
2483  * @v - File iterator
2484  *
2485  * Display information about the physical drives on physical channel 3.
2486  */
2487 static int
2488 proc_show_pdrv_ch3(struct seq_file *m, void *v)
2489 {
2490         return proc_show_pdrv(m, m->private, 3);
2491 }
2492
2493
2494 /**
2495  * proc_show_rdrv()
2496  * @m - Synthetic file construction data
2497  * @adapter - pointer to our soft state
2498  * @start - starting logical drive to display
2499  * @end - ending logical drive to display
2500  *
2501  * We do not print the inquiry information since its already available through
2502  * /proc/scsi/scsi interface
2503  */
2504 static int
2505 proc_show_rdrv(struct seq_file *m, adapter_t *adapter, int start, int end )
2506 {
2507         dma_addr_t      dma_handle;
2508         logdrv_param    *lparam;
2509         megacmd_t       mc;
2510         char            *disk_array;
2511         dma_addr_t      disk_array_dma_handle;
2512         caddr_t         inquiry;
2513         struct pci_dev  *pdev;
2514         u8      *rdrv_state;
2515         int     num_ldrv;
2516         u32     array_sz;
2517         int     i;
2518
2519         if( make_local_pdev(adapter, &pdev) != 0 )
2520                 return 0;
2521
2522         if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL )
2523                 goto free_pdev;
2524
2525         if( mega_adapinq(adapter, dma_handle) != 0 ) {
2526                 seq_puts(m, "Adapter inquiry failed.\n");
2527                 dev_warn(&adapter->dev->dev, "inquiry failed\n");
2528                 goto free_inquiry;
2529         }
2530
2531         memset(&mc, 0, sizeof(megacmd_t));
2532
2533         if( adapter->flag & BOARD_40LD ) {
2534                 array_sz = sizeof(disk_array_40ld);
2535
2536                 rdrv_state = ((mega_inquiry3 *)inquiry)->ldrv_state;
2537
2538                 num_ldrv = ((mega_inquiry3 *)inquiry)->num_ldrv;
2539         }
2540         else {
2541                 array_sz = sizeof(disk_array_8ld);
2542
2543                 rdrv_state = ((mraid_ext_inquiry *)inquiry)->
2544                         raid_inq.logdrv_info.ldrv_state;
2545
2546                 num_ldrv = ((mraid_ext_inquiry *)inquiry)->
2547                         raid_inq.logdrv_info.num_ldrv;
2548         }
2549
2550         disk_array = pci_alloc_consistent(pdev, array_sz,
2551                         &disk_array_dma_handle);
2552
2553         if( disk_array == NULL ) {
2554                 seq_puts(m, "memory not available.\n");
2555                 goto free_inquiry;
2556         }
2557
2558         mc.xferaddr = (u32)disk_array_dma_handle;
2559
2560         if( adapter->flag & BOARD_40LD ) {
2561                 mc.cmd = FC_NEW_CONFIG;
2562                 mc.opcode = OP_DCMD_READ_CONFIG;
2563
2564                 if( mega_internal_command(adapter, &mc, NULL) ) {
2565                         seq_puts(m, "40LD read config failed.\n");
2566                         goto free_pci;
2567                 }
2568
2569         }
2570         else {
2571                 mc.cmd = NEW_READ_CONFIG_8LD;
2572
2573                 if( mega_internal_command(adapter, &mc, NULL) ) {
2574                         mc.cmd = READ_CONFIG_8LD;
2575                         if( mega_internal_command(adapter, &mc, NULL) ) {
2576                                 seq_puts(m, "8LD read config failed.\n");
2577                                 goto free_pci;
2578                         }
2579                 }
2580         }
2581
2582         for( i = start; i < ( (end+1 < num_ldrv) ? end+1 : num_ldrv ); i++ ) {
2583
2584                 if( adapter->flag & BOARD_40LD ) {
2585                         lparam =
2586                         &((disk_array_40ld *)disk_array)->ldrv[i].lparam;
2587                 }
2588                 else {
2589                         lparam =
2590                         &((disk_array_8ld *)disk_array)->ldrv[i].lparam;
2591                 }
2592
2593                 /*
2594                  * Check for overflow. We print less than 240 characters for
2595                  * information about each logical drive.
2596                  */
2597                 seq_printf(m, "Logical drive:%2d:, ", i);
2598
2599                 switch( rdrv_state[i] & 0x0F ) {
2600                 case RDRV_OFFLINE:
2601                         seq_puts(m, "state: offline");
2602                         break;
2603                 case RDRV_DEGRADED:
2604                         seq_puts(m, "state: degraded");
2605                         break;
2606                 case RDRV_OPTIMAL:
2607                         seq_puts(m, "state: optimal");
2608                         break;
2609                 case RDRV_DELETED:
2610                         seq_puts(m, "state: deleted");
2611                         break;
2612                 default:
2613                         seq_puts(m, "state: unknown");
2614                         break;
2615                 }
2616
2617                 /*
2618                  * Check if check consistency or initialization is going on
2619                  * for this logical drive.
2620                  */
2621                 if( (rdrv_state[i] & 0xF0) == 0x20 )
2622                         seq_puts(m, ", check-consistency in progress");
2623                 else if( (rdrv_state[i] & 0xF0) == 0x10 )
2624                         seq_puts(m, ", initialization in progress");
2625
2626                 seq_putc(m, '\n');
2627
2628                 seq_printf(m, "Span depth:%3d, ", lparam->span_depth);
2629                 seq_printf(m, "RAID level:%3d, ", lparam->level);
2630                 seq_printf(m, "Stripe size:%3d, ",
2631                            lparam->stripe_sz ? lparam->stripe_sz/2: 128);
2632                 seq_printf(m, "Row size:%3d\n", lparam->row_size);
2633
2634                 seq_puts(m, "Read Policy: ");
2635                 switch(lparam->read_ahead) {
2636                 case NO_READ_AHEAD:
2637                         seq_puts(m, "No read ahead, ");
2638                         break;
2639                 case READ_AHEAD:
2640                         seq_puts(m, "Read ahead, ");
2641                         break;
2642                 case ADAP_READ_AHEAD:
2643                         seq_puts(m, "Adaptive, ");
2644                         break;
2645
2646                 }
2647
2648                 seq_puts(m, "Write Policy: ");
2649                 switch(lparam->write_mode) {
2650                 case WRMODE_WRITE_THRU:
2651                         seq_puts(m, "Write thru, ");
2652                         break;
2653                 case WRMODE_WRITE_BACK:
2654                         seq_puts(m, "Write back, ");
2655                         break;
2656                 }
2657
2658                 seq_puts(m, "Cache Policy: ");
2659                 switch(lparam->direct_io) {
2660                 case CACHED_IO:
2661                         seq_puts(m, "Cached IO\n\n");
2662                         break;
2663                 case DIRECT_IO:
2664                         seq_puts(m, "Direct IO\n\n");
2665                         break;
2666                 }
2667         }
2668
2669 free_pci:
2670         pci_free_consistent(pdev, array_sz, disk_array,
2671                         disk_array_dma_handle);
2672 free_inquiry:
2673         mega_free_inquiry(inquiry, dma_handle, pdev);
2674 free_pdev:
2675         free_local_pdev(pdev);
2676         return 0;
2677 }
2678
2679 /**
2680  * proc_show_rdrv_10()
2681  * @m - Synthetic file construction data
2682  * @v - File iterator
2683  *
2684  * Display real time information about the logical drives 0 through 9.
2685  */
2686 static int
2687 proc_show_rdrv_10(struct seq_file *m, void *v)
2688 {
2689         return proc_show_rdrv(m, m->private, 0, 9);
2690 }
2691
2692
2693 /**
2694  * proc_show_rdrv_20()
2695  * @m - Synthetic file construction data
2696  * @v - File iterator
2697  *
2698  * Display real time information about the logical drives 0 through 9.
2699  */
2700 static int
2701 proc_show_rdrv_20(struct seq_file *m, void *v)
2702 {
2703         return proc_show_rdrv(m, m->private, 10, 19);
2704 }
2705
2706
2707 /**
2708  * proc_show_rdrv_30()
2709  * @m - Synthetic file construction data
2710  * @v - File iterator
2711  *
2712  * Display real time information about the logical drives 0 through 9.
2713  */
2714 static int
2715 proc_show_rdrv_30(struct seq_file *m, void *v)
2716 {
2717         return proc_show_rdrv(m, m->private, 20, 29);
2718 }
2719
2720
2721 /**
2722  * proc_show_rdrv_40()
2723  * @m - Synthetic file construction data
2724  * @v - File iterator
2725  *
2726  * Display real time information about the logical drives 0 through 9.
2727  */
2728 static int
2729 proc_show_rdrv_40(struct seq_file *m, void *v)
2730 {
2731         return proc_show_rdrv(m, m->private, 30, 39);
2732 }
2733
2734
2735 /*
2736  * seq_file wrappers for procfile show routines.
2737  */
2738 static int mega_proc_open(struct inode *inode, struct file *file)
2739 {
2740         adapter_t *adapter = proc_get_parent_data(inode);
2741         int (*show)(struct seq_file *, void *) = PDE_DATA(inode);
2742
2743         return single_open(file, show, adapter);
2744 }
2745
2746 static const struct file_operations mega_proc_fops = {
2747         .open           = mega_proc_open,
2748         .read           = seq_read,
2749         .llseek         = seq_lseek,
2750         .release        = single_release,
2751 };
2752
2753 /*
2754  * Table of proc files we need to create.
2755  */
2756 struct mega_proc_file {
2757         const char *name;
2758         unsigned short ptr_offset;
2759         int (*show) (struct seq_file *m, void *v);
2760 };
2761
2762 static const struct mega_proc_file mega_proc_files[] = {
2763         { "config",           offsetof(adapter_t, proc_read), proc_show_config },
2764         { "stat",             offsetof(adapter_t, proc_stat), proc_show_stat },
2765         { "mailbox",          offsetof(adapter_t, proc_mbox), proc_show_mbox },
2766 #if MEGA_HAVE_ENH_PROC
2767         { "rebuild-rate",     offsetof(adapter_t, proc_rr), proc_show_rebuild_rate },
2768         { "battery-status",   offsetof(adapter_t, proc_battery), proc_show_battery },
2769         { "diskdrives-ch0",   offsetof(adapter_t, proc_pdrvstat[0]), proc_show_pdrv_ch0 },
2770         { "diskdrives-ch1",   offsetof(adapter_t, proc_pdrvstat[1]), proc_show_pdrv_ch1 },
2771         { "diskdrives-ch2",   offsetof(adapter_t, proc_pdrvstat[2]), proc_show_pdrv_ch2 },
2772         { "diskdrives-ch3",   offsetof(adapter_t, proc_pdrvstat[3]), proc_show_pdrv_ch3 },
2773         { "raiddrives-0-9",   offsetof(adapter_t, proc_rdrvstat[0]), proc_show_rdrv_10 },
2774         { "raiddrives-10-19", offsetof(adapter_t, proc_rdrvstat[1]), proc_show_rdrv_20 },
2775         { "raiddrives-20-29", offsetof(adapter_t, proc_rdrvstat[2]), proc_show_rdrv_30 },
2776         { "raiddrives-30-39", offsetof(adapter_t, proc_rdrvstat[3]), proc_show_rdrv_40 },
2777 #endif
2778         { NULL }
2779 };
2780
2781 /**
2782  * mega_create_proc_entry()
2783  * @index - index in soft state array
2784  * @parent - parent node for this /proc entry
2785  *
2786  * Creates /proc entries for our controllers.
2787  */
2788 static void
2789 mega_create_proc_entry(int index, struct proc_dir_entry *parent)
2790 {
2791         const struct mega_proc_file *f;
2792         adapter_t       *adapter = hba_soft_state[index];
2793         struct proc_dir_entry   *dir, *de, **ppde;
2794         u8              string[16];
2795
2796         sprintf(string, "hba%d", adapter->host->host_no);
2797
2798         dir = adapter->controller_proc_dir_entry =
2799                 proc_mkdir_data(string, 0, parent, adapter);
2800         if(!dir) {
2801                 dev_warn(&adapter->dev->dev, "proc_mkdir failed\n");
2802                 return;
2803         }
2804
2805         for (f = mega_proc_files; f->name; f++) {
2806                 de = proc_create_data(f->name, S_IRUSR, dir, &mega_proc_fops,
2807                                       f->show);
2808                 if (!de) {
2809                         dev_warn(&adapter->dev->dev, "proc_create failed\n");
2810                         return;
2811                 }
2812
2813                 ppde = (void *)adapter + f->ptr_offset;
2814                 *ppde = de;
2815         }
2816 }
2817
2818 #else
2819 static inline void mega_create_proc_entry(int index, struct proc_dir_entry *parent)
2820 {
2821 }
2822 #endif
2823
2824
2825 /**
2826  * megaraid_biosparam()
2827  *
2828  * Return the disk geometry for a particular disk
2829  */
2830 static int
2831 megaraid_biosparam(struct scsi_device *sdev, struct block_device *bdev,
2832                     sector_t capacity, int geom[])
2833 {
2834         adapter_t       *adapter;
2835         unsigned char   *bh;
2836         int     heads;
2837         int     sectors;
2838         int     cylinders;
2839         int     rval;
2840
2841         /* Get pointer to host config structure */
2842         adapter = (adapter_t *)sdev->host->hostdata;
2843
2844         if (IS_RAID_CH(adapter, sdev->channel)) {
2845                         /* Default heads (64) & sectors (32) */
2846                         heads = 64;
2847                         sectors = 32;
2848                         cylinders = (ulong)capacity / (heads * sectors);
2849
2850                         /*
2851                          * Handle extended translation size for logical drives
2852                          * > 1Gb
2853                          */
2854                         if ((ulong)capacity >= 0x200000) {
2855                                 heads = 255;
2856                                 sectors = 63;
2857                                 cylinders = (ulong)capacity / (heads * sectors);
2858                         }
2859
2860                         /* return result */
2861                         geom[0] = heads;
2862                         geom[1] = sectors;
2863                         geom[2] = cylinders;
2864         }
2865         else {
2866                 bh = scsi_bios_ptable(bdev);
2867
2868                 if( bh ) {
2869                         rval = scsi_partsize(bh, capacity,
2870                                             &geom[2], &geom[0], &geom[1]);
2871                         kfree(bh);
2872                         if( rval != -1 )
2873                                 return rval;
2874                 }
2875
2876                 dev_info(&adapter->dev->dev,
2877                          "invalid partition on this disk on channel %d\n",
2878                          sdev->channel);
2879
2880                 /* Default heads (64) & sectors (32) */
2881                 heads = 64;
2882                 sectors = 32;
2883                 cylinders = (ulong)capacity / (heads * sectors);
2884
2885                 /* Handle extended translation size for logical drives > 1Gb */
2886                 if ((ulong)capacity >= 0x200000) {
2887                         heads = 255;
2888                         sectors = 63;
2889                         cylinders = (ulong)capacity / (heads * sectors);
2890                 }
2891
2892                 /* return result */
2893                 geom[0] = heads;
2894                 geom[1] = sectors;
2895                 geom[2] = cylinders;
2896         }
2897
2898         return 0;
2899 }
2900
2901 /**
2902  * mega_init_scb()
2903  * @adapter - pointer to our soft state
2904  *
2905  * Allocate memory for the various pointers in the scb structures:
2906  * scatter-gather list pointer, passthru and extended passthru structure
2907  * pointers.
2908  */
2909 static int
2910 mega_init_scb(adapter_t *adapter)
2911 {
2912         scb_t   *scb;
2913         int     i;
2914
2915         for( i = 0; i < adapter->max_cmds; i++ ) {
2916
2917                 scb = &adapter->scb_list[i];
2918
2919                 scb->sgl64 = NULL;
2920                 scb->sgl = NULL;
2921                 scb->pthru = NULL;
2922                 scb->epthru = NULL;
2923         }
2924
2925         for( i = 0; i < adapter->max_cmds; i++ ) {
2926
2927                 scb = &adapter->scb_list[i];
2928
2929                 scb->idx = i;
2930
2931                 scb->sgl64 = pci_alloc_consistent(adapter->dev,
2932                                 sizeof(mega_sgl64) * adapter->sglen,
2933                                 &scb->sgl_dma_addr);
2934
2935                 scb->sgl = (mega_sglist *)scb->sgl64;
2936
2937                 if( !scb->sgl ) {
2938                         dev_warn(&adapter->dev->dev, "RAID: Can't allocate sglist\n");
2939                         mega_free_sgl(adapter);
2940                         return -1;
2941                 }
2942
2943                 scb->pthru = pci_alloc_consistent(adapter->dev,
2944                                 sizeof(mega_passthru),
2945                                 &scb->pthru_dma_addr);
2946
2947                 if( !scb->pthru ) {
2948                         dev_warn(&adapter->dev->dev, "RAID: Can't allocate passthru\n");
2949                         mega_free_sgl(adapter);
2950                         return -1;
2951                 }
2952
2953                 scb->epthru = pci_alloc_consistent(adapter->dev,
2954                                 sizeof(mega_ext_passthru),
2955                                 &scb->epthru_dma_addr);
2956
2957                 if( !scb->epthru ) {
2958                         dev_warn(&adapter->dev->dev,
2959                                 "Can't allocate extended passthru\n");
2960                         mega_free_sgl(adapter);
2961                         return -1;
2962                 }
2963
2964
2965                 scb->dma_type = MEGA_DMA_TYPE_NONE;
2966
2967                 /*
2968                  * Link to free list
2969                  * lock not required since we are loading the driver, so no
2970                  * commands possible right now.
2971                  */
2972                 scb->state = SCB_FREE;
2973                 scb->cmd = NULL;
2974                 list_add(&scb->list, &adapter->free_list);
2975         }
2976
2977         return 0;
2978 }
2979
2980
2981 /**
2982  * megadev_open()
2983  * @inode - unused
2984  * @filep - unused
2985  *
2986  * Routines for the character/ioctl interface to the driver. Find out if this
2987  * is a valid open.
2988  */
2989 static int
2990 megadev_open (struct inode *inode, struct file *filep)
2991 {
2992         /*
2993          * Only allow superuser to access private ioctl interface
2994          */
2995         if( !capable(CAP_SYS_ADMIN) ) return -EACCES;
2996
2997         return 0;
2998 }
2999
3000
3001 /**
3002  * megadev_ioctl()
3003  * @inode - Our device inode
3004  * @filep - unused
3005  * @cmd - ioctl command
3006  * @arg - user buffer
3007  *
3008  * ioctl entry point for our private ioctl interface. We move the data in from
3009  * the user space, prepare the command (if necessary, convert the old MIMD
3010  * ioctl to new ioctl command), and issue a synchronous command to the
3011  * controller.
3012  */
3013 static int
3014 megadev_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
3015 {
3016         adapter_t       *adapter;
3017         nitioctl_t      uioc;
3018         int             adapno;
3019         int             rval;
3020         mega_passthru   __user *upthru; /* user address for passthru */
3021         mega_passthru   *pthru;         /* copy user passthru here */
3022         dma_addr_t      pthru_dma_hndl;
3023         void            *data = NULL;   /* data to be transferred */
3024         dma_addr_t      data_dma_hndl;  /* dma handle for data xfer area */
3025         megacmd_t       mc;
3026         megastat_t      __user *ustats;
3027         int             num_ldrv;
3028         u32             uxferaddr = 0;
3029         struct pci_dev  *pdev;
3030
3031         ustats = NULL; /* avoid compilation warnings */
3032         num_ldrv = 0;
3033
3034         /*
3035          * Make sure only USCSICMD are issued through this interface.
3036          * MIMD application would still fire different command.
3037          */
3038         if( (_IOC_TYPE(cmd) != MEGAIOC_MAGIC) && (cmd != USCSICMD) ) {
3039                 return -EINVAL;
3040         }
3041
3042         /*
3043          * Check and convert a possible MIMD command to NIT command.
3044          * mega_m_to_n() copies the data from the user space, so we do not
3045          * have to do it here.
3046          * NOTE: We will need some user address to copyout the data, therefore
3047          * the inteface layer will also provide us with the required user
3048          * addresses.
3049          */
3050         memset(&uioc, 0, sizeof(nitioctl_t));
3051         if( (rval = mega_m_to_n( (void __user *)arg, &uioc)) != 0 )
3052                 return rval;
3053
3054
3055         switch( uioc.opcode ) {
3056
3057         case GET_DRIVER_VER:
3058                 if( put_user(driver_ver, (u32 __user *)uioc.uioc_uaddr) )
3059                         return (-EFAULT);
3060
3061                 break;
3062
3063         case GET_N_ADAP:
3064                 if( put_user(hba_count, (u32 __user *)uioc.uioc_uaddr) )
3065                         return (-EFAULT);
3066
3067                 /*
3068                  * Shucks. MIMD interface returns a positive value for number
3069                  * of adapters. TODO: Change it to return 0 when there is no
3070                  * applicatio using mimd interface.
3071                  */
3072                 return hba_count;
3073
3074         case GET_ADAP_INFO:
3075
3076                 /*
3077                  * Which adapter
3078                  */
3079                 if( (adapno = GETADAP(uioc.adapno)) >= hba_count )
3080                         return (-ENODEV);
3081
3082                 if( copy_to_user(uioc.uioc_uaddr, mcontroller+adapno,
3083                                 sizeof(struct mcontroller)) )
3084                         return (-EFAULT);
3085                 break;
3086
3087 #if MEGA_HAVE_STATS
3088
3089         case GET_STATS:
3090                 /*
3091                  * Which adapter
3092                  */
3093                 if( (adapno = GETADAP(uioc.adapno)) >= hba_count )
3094                         return (-ENODEV);
3095
3096                 adapter = hba_soft_state[adapno];
3097
3098                 ustats = uioc.uioc_uaddr;
3099
3100                 if( copy_from_user(&num_ldrv, &ustats->num_ldrv, sizeof(int)) )
3101                         return (-EFAULT);
3102
3103                 /*
3104                  * Check for the validity of the logical drive number
3105                  */
3106                 if( num_ldrv >= MAX_LOGICAL_DRIVES_40LD ) return -EINVAL;
3107
3108                 if( copy_to_user(ustats->nreads, adapter->nreads,
3109                                         num_ldrv*sizeof(u32)) )
3110                         return -EFAULT;
3111
3112                 if( copy_to_user(ustats->nreadblocks, adapter->nreadblocks,
3113                                         num_ldrv*sizeof(u32)) )
3114                         return -EFAULT;
3115
3116                 if( copy_to_user(ustats->nwrites, adapter->nwrites,
3117                                         num_ldrv*sizeof(u32)) )
3118                         return -EFAULT;
3119
3120                 if( copy_to_user(ustats->nwriteblocks, adapter->nwriteblocks,
3121                                         num_ldrv*sizeof(u32)) )
3122                         return -EFAULT;
3123
3124                 if( copy_to_user(ustats->rd_errors, adapter->rd_errors,
3125                                         num_ldrv*sizeof(u32)) )
3126                         return -EFAULT;
3127
3128                 if( copy_to_user(ustats->wr_errors, adapter->wr_errors,
3129                                         num_ldrv*sizeof(u32)) )
3130                         return -EFAULT;
3131
3132                 return 0;
3133
3134 #endif
3135         case MBOX_CMD:
3136
3137                 /*
3138                  * Which adapter
3139                  */
3140                 if( (adapno = GETADAP(uioc.adapno)) >= hba_count )
3141                         return (-ENODEV);
3142
3143                 adapter = hba_soft_state[adapno];
3144
3145                 /*
3146                  * Deletion of logical drive is a special case. The adapter
3147                  * should be quiescent before this command is issued.
3148                  */
3149                 if( uioc.uioc_rmbox[0] == FC_DEL_LOGDRV &&
3150                                 uioc.uioc_rmbox[2] == OP_DEL_LOGDRV ) {
3151
3152                         /*
3153                          * Do we support this feature
3154                          */
3155                         if( !adapter->support_random_del ) {
3156                                 dev_warn(&adapter->dev->dev, "logdrv "
3157                                         "delete on non-supporting F/W\n");
3158
3159                                 return (-EINVAL);
3160                         }
3161
3162                         rval = mega_del_logdrv( adapter, uioc.uioc_rmbox[3] );
3163
3164                         if( rval == 0 ) {
3165                                 memset(&mc, 0, sizeof(megacmd_t));
3166
3167                                 mc.status = rval;
3168
3169                                 rval = mega_n_to_m((void __user *)arg, &mc);
3170                         }
3171
3172                         return rval;
3173                 }
3174                 /*
3175                  * This interface only support the regular passthru commands.
3176                  * Reject extended passthru and 64-bit passthru
3177                  */
3178                 if( uioc.uioc_rmbox[0] == MEGA_MBOXCMD_PASSTHRU64 ||
3179                         uioc.uioc_rmbox[0] == MEGA_MBOXCMD_EXTPTHRU ) {
3180
3181                         dev_warn(&adapter->dev->dev, "rejected passthru\n");
3182
3183                         return (-EINVAL);
3184                 }
3185
3186                 /*
3187                  * For all internal commands, the buffer must be allocated in
3188                  * <4GB address range
3189                  */
3190                 if( make_local_pdev(adapter, &pdev) != 0 )
3191                         return -EIO;
3192
3193                 /* Is it a passthru command or a DCMD */
3194                 if( uioc.uioc_rmbox[0] == MEGA_MBOXCMD_PASSTHRU ) {
3195                         /* Passthru commands */
3196
3197                         pthru = pci_alloc_consistent(pdev,
3198                                         sizeof(mega_passthru),
3199                                         &pthru_dma_hndl);
3200
3201                         if( pthru == NULL ) {
3202                                 free_local_pdev(pdev);
3203                                 return (-ENOMEM);
3204                         }
3205
3206                         /*
3207                          * The user passthru structure
3208                          */
3209                         upthru = (mega_passthru __user *)(unsigned long)MBOX(uioc)->xferaddr;
3210
3211                         /*
3212                          * Copy in the user passthru here.
3213                          */
3214                         if( copy_from_user(pthru, upthru,
3215                                                 sizeof(mega_passthru)) ) {
3216
3217                                 pci_free_consistent(pdev,
3218                                                 sizeof(mega_passthru), pthru,
3219                                                 pthru_dma_hndl);
3220
3221                                 free_local_pdev(pdev);
3222
3223                                 return (-EFAULT);
3224                         }
3225
3226                         /*
3227                          * Is there a data transfer
3228                          */
3229                         if( pthru->dataxferlen ) {
3230                                 data = pci_alloc_consistent(pdev,
3231                                                 pthru->dataxferlen,
3232                                                 &data_dma_hndl);
3233
3234                                 if( data == NULL ) {
3235                                         pci_free_consistent(pdev,
3236                                                         sizeof(mega_passthru),
3237                                                         pthru,
3238                                                         pthru_dma_hndl);
3239
3240                                         free_local_pdev(pdev);
3241
3242                                         return (-ENOMEM);
3243                                 }
3244
3245                                 /*
3246                                  * Save the user address and point the kernel
3247                                  * address at just allocated memory
3248                                  */
3249                                 uxferaddr = pthru->dataxferaddr;
3250                                 pthru->dataxferaddr = data_dma_hndl;
3251                         }
3252
3253
3254                         /*
3255                          * Is data coming down-stream
3256                          */
3257                         if( pthru->dataxferlen && (uioc.flags & UIOC_WR) ) {
3258                                 /*
3259                                  * Get the user data
3260                                  */
3261                                 if( copy_from_user(data, (char __user *)(unsigned long) uxferaddr,
3262                                                         pthru->dataxferlen) ) {
3263                                         rval = (-EFAULT);
3264                                         goto freemem_and_return;
3265                                 }
3266                         }
3267
3268                         memset(&mc, 0, sizeof(megacmd_t));
3269
3270                         mc.cmd = MEGA_MBOXCMD_PASSTHRU;
3271                         mc.xferaddr = (u32)pthru_dma_hndl;
3272
3273                         /*
3274                          * Issue the command
3275                          */
3276                         mega_internal_command(adapter, &mc, pthru);
3277
3278                         rval = mega_n_to_m((void __user *)arg, &mc);
3279
3280                         if( rval ) goto freemem_and_return;
3281
3282
3283                         /*
3284                          * Is data going up-stream
3285                          */
3286                         if( pthru->dataxferlen && (uioc.flags & UIOC_RD) ) {
3287                                 if( copy_to_user((char __user *)(unsigned long) uxferaddr, data,
3288                                                         pthru->dataxferlen) ) {
3289                                         rval = (-EFAULT);
3290                                 }
3291                         }
3292
3293                         /*
3294                          * Send the request sense data also, irrespective of
3295                          * whether the user has asked for it or not.
3296                          */
3297                         if (copy_to_user(upthru->reqsensearea,
3298                                         pthru->reqsensearea, 14))
3299                                 rval = -EFAULT;
3300
3301 freemem_and_return:
3302                         if( pthru->dataxferlen ) {
3303                                 pci_free_consistent(pdev,
3304                                                 pthru->dataxferlen, data,
3305                                                 data_dma_hndl);
3306                         }
3307
3308                         pci_free_consistent(pdev, sizeof(mega_passthru),
3309                                         pthru, pthru_dma_hndl);
3310
3311                         free_local_pdev(pdev);
3312
3313                         return rval;
3314                 }
3315                 else {
3316                         /* DCMD commands */
3317
3318                         /*
3319                          * Is there a data transfer
3320                          */
3321                         if( uioc.xferlen ) {
3322                                 data = pci_alloc_consistent(pdev,
3323                                                 uioc.xferlen, &data_dma_hndl);
3324
3325                                 if( data == NULL ) {
3326                                         free_local_pdev(pdev);
3327                                         return (-ENOMEM);
3328                                 }
3329
3330                                 uxferaddr = MBOX(uioc)->xferaddr;
3331                         }
3332
3333                         /*
3334                          * Is data coming down-stream
3335                          */
3336                         if( uioc.xferlen && (uioc.flags & UIOC_WR) ) {
3337                                 /*
3338                                  * Get the user data
3339                                  */
3340                                 if( copy_from_user(data, (char __user *)(unsigned long) uxferaddr,
3341                                                         uioc.xferlen) ) {
3342
3343                                         pci_free_consistent(pdev,
3344                                                         uioc.xferlen,
3345                                                         data, data_dma_hndl);
3346
3347                                         free_local_pdev(pdev);
3348
3349                                         return (-EFAULT);
3350                                 }
3351                         }
3352
3353                         memcpy(&mc, MBOX(uioc), sizeof(megacmd_t));
3354
3355                         mc.xferaddr = (u32)data_dma_hndl;
3356
3357                         /*
3358                          * Issue the command
3359                          */
3360                         mega_internal_command(adapter, &mc, NULL);
3361
3362                         rval = mega_n_to_m((void __user *)arg, &mc);
3363
3364                         if( rval ) {
3365                                 if( uioc.xferlen ) {
3366                                         pci_free_consistent(pdev,
3367                                                         uioc.xferlen, data,
3368                                                         data_dma_hndl);
3369                                 }
3370
3371                                 free_local_pdev(pdev);
3372
3373                                 return rval;
3374                         }
3375
3376                         /*
3377                          * Is data going up-stream
3378                          */
3379                         if( uioc.xferlen && (uioc.flags & UIOC_RD) ) {
3380                                 if( copy_to_user((char __user *)(unsigned long) uxferaddr, data,
3381                                                         uioc.xferlen) ) {
3382
3383                                         rval = (-EFAULT);
3384                                 }
3385                         }
3386
3387                         if( uioc.xferlen ) {
3388                                 pci_free_consistent(pdev,
3389                                                 uioc.xferlen, data,
3390                                                 data_dma_hndl);
3391                         }
3392
3393                         free_local_pdev(pdev);
3394
3395                         return rval;
3396                 }
3397
3398         default:
3399                 return (-EINVAL);
3400         }
3401
3402         return 0;
3403 }
3404
3405 static long
3406 megadev_unlocked_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
3407 {
3408         int ret;
3409
3410         mutex_lock(&megadev_mutex);
3411         ret = megadev_ioctl(filep, cmd, arg);
3412         mutex_unlock(&megadev_mutex);
3413
3414         return ret;
3415 }
3416
3417 /**
3418  * mega_m_to_n()
3419  * @arg - user address
3420  * @uioc - new ioctl structure
3421  *
3422  * A thin layer to convert older mimd interface ioctl structure to NIT ioctl
3423  * structure
3424  *
3425  * Converts the older mimd ioctl structure to newer NIT structure
3426  */
3427 static int
3428 mega_m_to_n(void __user *arg, nitioctl_t *uioc)
3429 {
3430         struct uioctl_t uioc_mimd;
3431         char    signature[8] = {0};
3432         u8      opcode;
3433         u8      subopcode;
3434
3435
3436         /*
3437          * check is the application conforms to NIT. We do not have to do much
3438          * in that case.
3439          * We exploit the fact that the signature is stored in the very
3440          * beginning of the structure.
3441          */
3442
3443         if( copy_from_user(signature, arg, 7) )
3444                 return (-EFAULT);
3445
3446         if( memcmp(signature, "MEGANIT", 7) == 0 ) {
3447
3448                 /*
3449                  * NOTE NOTE: The nit ioctl is still under flux because of
3450                  * change of mailbox definition, in HPE. No applications yet
3451                  * use this interface and let's not have applications use this
3452                  * interface till the new specifitions are in place.
3453                  */
3454                 return -EINVAL;
3455 #if 0
3456                 if( copy_from_user(uioc, arg, sizeof(nitioctl_t)) )
3457                         return (-EFAULT);
3458                 return 0;
3459 #endif
3460         }
3461
3462         /*
3463          * Else assume we have mimd uioctl_t as arg. Convert to nitioctl_t
3464          *
3465          * Get the user ioctl structure
3466          */
3467         if( copy_from_user(&uioc_mimd, arg, sizeof(struct uioctl_t)) )
3468                 return (-EFAULT);
3469
3470
3471         /*
3472          * Get the opcode and subopcode for the commands
3473          */
3474         opcode = uioc_mimd.ui.fcs.opcode;
3475         subopcode = uioc_mimd.ui.fcs.subopcode;
3476
3477         switch (opcode) {
3478         case 0x82:
3479
3480                 switch (subopcode) {
3481
3482                 case MEGAIOC_QDRVRVER:  /* Query driver version */
3483                         uioc->opcode = GET_DRIVER_VER;
3484                         uioc->uioc_uaddr = uioc_mimd.data;
3485                         break;
3486
3487                 case MEGAIOC_QNADAP:    /* Get # of adapters */
3488                         uioc->opcode = GET_N_ADAP;
3489                         uioc->uioc_uaddr = uioc_mimd.data;
3490                         break;
3491
3492                 case MEGAIOC_QADAPINFO: /* Get adapter information */
3493                         uioc->opcode = GET_ADAP_INFO;
3494                         uioc->adapno = uioc_mimd.ui.fcs.adapno;
3495                         uioc->uioc_uaddr = uioc_mimd.data;
3496                         break;
3497
3498                 default:
3499                         return(-EINVAL);
3500                 }
3501
3502                 break;
3503
3504
3505         case 0x81:
3506
3507                 uioc->opcode = MBOX_CMD;
3508                 uioc->adapno = uioc_mimd.ui.fcs.adapno;
3509
3510                 memcpy(uioc->uioc_rmbox, uioc_mimd.mbox, 18);
3511
3512                 uioc->xferlen = uioc_mimd.ui.fcs.length;
3513
3514                 if( uioc_mimd.outlen ) uioc->flags = UIOC_RD;
3515                 if( uioc_mimd.inlen ) uioc->flags |= UIOC_WR;
3516
3517                 break;
3518
3519         case 0x80:
3520
3521                 uioc->opcode = MBOX_CMD;
3522                 uioc->adapno = uioc_mimd.ui.fcs.adapno;
3523
3524                 memcpy(uioc->uioc_rmbox, uioc_mimd.mbox, 18);
3525
3526                 /*
3527                  * Choose the xferlen bigger of input and output data
3528                  */
3529                 uioc->xferlen = uioc_mimd.outlen > uioc_mimd.inlen ?
3530                         uioc_mimd.outlen : uioc_mimd.inlen;
3531
3532                 if( uioc_mimd.outlen ) uioc->flags = UIOC_RD;
3533                 if( uioc_mimd.inlen ) uioc->flags |= UIOC_WR;
3534
3535                 break;
3536
3537         default:
3538                 return (-EINVAL);
3539
3540         }
3541
3542         return 0;
3543 }
3544
3545 /*
3546  * mega_n_to_m()
3547  * @arg - user address
3548  * @mc - mailbox command
3549  *
3550  * Updates the status information to the application, depending on application
3551  * conforms to older mimd ioctl interface or newer NIT ioctl interface
3552  */
3553 static int
3554 mega_n_to_m(void __user *arg, megacmd_t *mc)
3555 {
3556         nitioctl_t      __user *uiocp;
3557         megacmd_t       __user *umc;
3558         mega_passthru   __user *upthru;
3559         struct uioctl_t __user *uioc_mimd;
3560         char    signature[8] = {0};
3561
3562         /*
3563          * check is the application conforms to NIT.
3564          */
3565         if( copy_from_user(signature, arg, 7) )
3566                 return -EFAULT;
3567
3568         if( memcmp(signature, "MEGANIT", 7) == 0 ) {
3569
3570                 uiocp = arg;
3571
3572                 if( put_user(mc->status, (u8 __user *)&MBOX_P(uiocp)->status) )
3573                         return (-EFAULT);
3574
3575                 if( mc->cmd == MEGA_MBOXCMD_PASSTHRU ) {
3576
3577                         umc = MBOX_P(uiocp);
3578
3579                         if (get_user(upthru, (mega_passthru __user * __user *)&umc->xferaddr))
3580                                 return -EFAULT;
3581
3582                         if( put_user(mc->status, (u8 __user *)&upthru->scsistatus))
3583                                 return (-EFAULT);
3584                 }
3585         }
3586         else {
3587                 uioc_mimd = arg;
3588
3589                 if( put_user(mc->status, (u8 __user *)&uioc_mimd->mbox[17]) )
3590                         return (-EFAULT);
3591
3592                 if( mc->cmd == MEGA_MBOXCMD_PASSTHRU ) {
3593
3594                         umc = (megacmd_t __user *)uioc_mimd->mbox;
3595
3596                         if (get_user(upthru, (mega_passthru __user * __user *)&umc->xferaddr))
3597                                 return (-EFAULT);
3598
3599                         if( put_user(mc->status, (u8 __user *)&upthru->scsistatus) )
3600                                 return (-EFAULT);
3601                 }
3602         }
3603
3604         return 0;
3605 }
3606
3607
3608 /*
3609  * MEGARAID 'FW' commands.
3610  */
3611
3612 /**
3613  * mega_is_bios_enabled()
3614  * @adapter - pointer to our soft state
3615  *
3616  * issue command to find out if the BIOS is enabled for this controller
3617  */
3618 static int
3619 mega_is_bios_enabled(adapter_t *adapter)
3620 {
3621         unsigned char   raw_mbox[sizeof(struct mbox_out)];
3622         mbox_t  *mbox;
3623         int     ret;
3624
3625         mbox = (mbox_t *)raw_mbox;
3626
3627         memset(&mbox->m_out, 0, sizeof(raw_mbox));
3628
3629         memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
3630
3631         mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;
3632
3633         raw_mbox[0] = IS_BIOS_ENABLED;
3634         raw_mbox[2] = GET_BIOS;
3635
3636
3637         ret = issue_scb_block(adapter, raw_mbox);
3638
3639         return *(char *)adapter->mega_buffer;
3640 }
3641
3642
3643 /**
3644  * mega_enum_raid_scsi()
3645  * @adapter - pointer to our soft state
3646  *
3647  * Find out what channels are RAID/SCSI. This information is used to
3648  * differentiate the virtual channels and physical channels and to support
3649  * ROMB feature and non-disk devices.
3650  */
3651 static void
3652 mega_enum_raid_scsi(adapter_t *adapter)
3653 {
3654         unsigned char raw_mbox[sizeof(struct mbox_out)];
3655         mbox_t *mbox;
3656         int i;
3657
3658         mbox = (mbox_t *)raw_mbox;
3659
3660         memset(&mbox->m_out, 0, sizeof(raw_mbox));
3661
3662         /*
3663          * issue command to find out what channels are raid/scsi
3664          */
3665         raw_mbox[0] = CHNL_CLASS;
3666         raw_mbox[2] = GET_CHNL_CLASS;
3667
3668         memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
3669
3670         mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;
3671
3672         /*
3673          * Non-ROMB firmware fail this command, so all channels
3674          * must be shown RAID
3675          */
3676         adapter->mega_ch_class = 0xFF;
3677
3678         if(!issue_scb_block(adapter, raw_mbox)) {
3679                 adapter->mega_ch_class = *((char *)adapter->mega_buffer);
3680
3681         }
3682
3683         for( i = 0; i < adapter->product_info.nchannels; i++ ) {
3684                 if( (adapter->mega_ch_class >> i) & 0x01 ) {
3685                         dev_info(&adapter->dev->dev, "channel[%d] is raid\n",
3686                                         i);
3687                 }
3688                 else {
3689                         dev_info(&adapter->dev->dev, "channel[%d] is scsi\n",
3690                                         i);
3691                 }
3692         }
3693
3694         return;
3695 }
3696
3697
3698 /**
3699  * mega_get_boot_drv()
3700  * @adapter - pointer to our soft state
3701  *
3702  * Find out which device is the boot device. Note, any logical drive or any
3703  * phyical device (e.g., a CDROM) can be designated as a boot device.
3704  */
3705 static void
3706 mega_get_boot_drv(adapter_t *adapter)
3707 {
3708         struct private_bios_data        *prv_bios_data;
3709         unsigned char   raw_mbox[sizeof(struct mbox_out)];
3710         mbox_t  *mbox;
3711         u16     cksum = 0;
3712         u8      *cksum_p;
3713         u8      boot_pdrv;
3714         int     i;
3715
3716         mbox = (mbox_t *)raw_mbox;
3717
3718         memset(&mbox->m_out, 0, sizeof(raw_mbox));
3719
3720         raw_mbox[0] = BIOS_PVT_DATA;
3721         raw_mbox[2] = GET_BIOS_PVT_DATA;
3722
3723         memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
3724
3725         mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;
3726
3727         adapter->boot_ldrv_enabled = 0;
3728         adapter->boot_ldrv = 0;
3729
3730         adapter->boot_pdrv_enabled = 0;
3731         adapter->boot_pdrv_ch = 0;
3732         adapter->boot_pdrv_tgt = 0;
3733
3734         if(issue_scb_block(adapter, raw_mbox) == 0) {
3735                 prv_bios_data =
3736                         (struct private_bios_data *)adapter->mega_buffer;
3737
3738                 cksum = 0;
3739                 cksum_p = (char *)prv_bios_data;
3740                 for (i = 0; i < 14; i++ ) {
3741                         cksum += (u16)(*cksum_p++);
3742                 }
3743
3744                 if (prv_bios_data->cksum == (u16)(0-cksum) ) {
3745
3746                         /*
3747                          * If MSB is set, a physical drive is set as boot
3748                          * device
3749                          */
3750                         if( prv_bios_data->boot_drv & 0x80 ) {
3751                                 adapter->boot_pdrv_enabled = 1;
3752                                 boot_pdrv = prv_bios_data->boot_drv & 0x7F;
3753                                 adapter->boot_pdrv_ch = boot_pdrv / 16;
3754                                 adapter->boot_pdrv_tgt = boot_pdrv % 16;
3755                         }
3756                         else {
3757                                 adapter->boot_ldrv_enabled = 1;
3758                                 adapter->boot_ldrv = prv_bios_data->boot_drv;
3759                         }
3760                 }
3761         }
3762
3763 }
3764
3765 /**
3766  * mega_support_random_del()
3767  * @adapter - pointer to our soft state
3768  *
3769  * Find out if this controller supports random deletion and addition of
3770  * logical drives
3771  */
3772 static int
3773 mega_support_random_del(adapter_t *adapter)
3774 {
3775         unsigned char raw_mbox[sizeof(struct mbox_out)];
3776         mbox_t *mbox;
3777         int rval;
3778
3779         mbox = (mbox_t *)raw_mbox;
3780
3781         memset(&mbox->m_out, 0, sizeof(raw_mbox));
3782
3783         /*
3784          * issue command
3785          */
3786         raw_mbox[0] = FC_DEL_LOGDRV;
3787         raw_mbox[2] = OP_SUP_DEL_LOGDRV;
3788
3789         rval = issue_scb_block(adapter, raw_mbox);
3790
3791         return !rval;
3792 }
3793
3794
3795 /**
3796  * mega_support_ext_cdb()
3797  * @adapter - pointer to our soft state
3798  *
3799  * Find out if this firmware support cdblen > 10
3800  */
3801 static int
3802 mega_support_ext_cdb(adapter_t *adapter)
3803 {
3804         unsigned char raw_mbox[sizeof(struct mbox_out)];
3805         mbox_t *mbox;
3806         int rval;
3807
3808         mbox = (mbox_t *)raw_mbox;
3809
3810         memset(&mbox->m_out, 0, sizeof(raw_mbox));
3811         /*
3812          * issue command to find out if controller supports extended CDBs.
3813          */
3814         raw_mbox[0] = 0xA4;
3815         raw_mbox[2] = 0x16;
3816
3817         rval = issue_scb_block(adapter, raw_mbox);
3818
3819         return !rval;
3820 }
3821
3822
3823 /**
3824  * mega_del_logdrv()
3825  * @adapter - pointer to our soft state
3826  * @logdrv - logical drive to be deleted
3827  *
3828  * Delete the specified logical drive. It is the responsibility of the user
3829  * app to let the OS know about this operation.
3830  */
3831 static int
3832 mega_del_logdrv(adapter_t *adapter, int logdrv)
3833 {
3834         unsigned long flags;
3835         scb_t *scb;
3836         int rval;
3837
3838         /*
3839          * Stop sending commands to the controller, queue them internally.
3840          * When deletion is complete, ISR will flush the queue.
3841          */
3842         atomic_set(&adapter->quiescent, 1);
3843
3844         /*
3845          * Wait till all the issued commands are complete and there are no
3846          * commands in the pending queue
3847          */
3848         while (atomic_read(&adapter->pend_cmds) > 0 ||
3849                !list_empty(&adapter->pending_list))
3850                 msleep(1000);   /* sleep for 1s */
3851
3852         rval = mega_do_del_logdrv(adapter, logdrv);
3853
3854         spin_lock_irqsave(&adapter->lock, flags);
3855
3856         /*
3857          * If delete operation was successful, add 0x80 to the logical drive
3858          * ids for commands in the pending queue.
3859          */
3860         if (adapter->read_ldidmap) {
3861                 struct list_head *pos;
3862                 list_for_each(pos, &adapter->pending_list) {
3863                         scb = list_entry(pos, scb_t, list);
3864                         if (scb->pthru->logdrv < 0x80 )
3865                                 scb->pthru->logdrv += 0x80;
3866                 }
3867         }
3868
3869         atomic_set(&adapter->quiescent, 0);
3870
3871         mega_runpendq(adapter);
3872
3873         spin_unlock_irqrestore(&adapter->lock, flags);
3874
3875         return rval;
3876 }
3877
3878
3879 static int
3880 mega_do_del_logdrv(adapter_t *adapter, int logdrv)
3881 {
3882         megacmd_t       mc;
3883         int     rval;
3884
3885         memset( &mc, 0, sizeof(megacmd_t));
3886
3887         mc.cmd = FC_DEL_LOGDRV;
3888         mc.opcode = OP_DEL_LOGDRV;
3889         mc.subopcode = logdrv;
3890
3891         rval = mega_internal_command(adapter, &mc, NULL);
3892
3893         /* log this event */
3894         if(rval) {
3895                 dev_warn(&adapter->dev->dev, "Delete LD-%d failed", logdrv);
3896                 return rval;
3897         }
3898
3899         /*
3900          * After deleting first logical drive, the logical drives must be
3901          * addressed by adding 0x80 to the logical drive id.
3902          */
3903         adapter->read_ldidmap = 1;
3904
3905         return rval;
3906 }
3907
3908
3909 /**
3910  * mega_get_max_sgl()
3911  * @adapter - pointer to our soft state
3912  *
3913  * Find out the maximum number of scatter-gather elements supported by this
3914  * version of the firmware
3915  */
3916 static void
3917 mega_get_max_sgl(adapter_t *adapter)
3918 {
3919         unsigned char   raw_mbox[sizeof(struct mbox_out)];
3920         mbox_t  *mbox;
3921
3922         mbox = (mbox_t *)raw_mbox;
3923
3924         memset(mbox, 0, sizeof(raw_mbox));
3925
3926         memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
3927
3928         mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;
3929
3930         raw_mbox[0] = MAIN_MISC_OPCODE;
3931         raw_mbox[2] = GET_MAX_SG_SUPPORT;
3932
3933
3934         if( issue_scb_block(adapter, raw_mbox) ) {
3935                 /*
3936                  * f/w does not support this command. Choose the default value
3937                  */
3938                 adapter->sglen = MIN_SGLIST;
3939         }
3940         else {
3941                 adapter->sglen = *((char *)adapter->mega_buffer);
3942
3943                 /*
3944                  * Make sure this is not more than the resources we are
3945                  * planning to allocate
3946                  */
3947                 if ( adapter->sglen > MAX_SGLIST )
3948                         adapter->sglen = MAX_SGLIST;
3949         }
3950
3951         return;
3952 }
3953
3954
3955 /**
3956  * mega_support_cluster()
3957  * @adapter - pointer to our soft state
3958  *
3959  * Find out if this firmware support cluster calls.
3960  */
3961 static int
3962 mega_support_cluster(adapter_t *adapter)
3963 {
3964         unsigned char   raw_mbox[sizeof(struct mbox_out)];
3965         mbox_t  *mbox;
3966
3967         mbox = (mbox_t *)raw_mbox;
3968
3969         memset(mbox, 0, sizeof(raw_mbox));
3970
3971         memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
3972
3973         mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;
3974
3975         /*
3976          * Try to get the initiator id. This command will succeed iff the
3977          * clustering is available on this HBA.
3978          */
3979         raw_mbox[0] = MEGA_GET_TARGET_ID;
3980
3981         if( issue_scb_block(adapter, raw_mbox) == 0 ) {
3982
3983                 /*
3984                  * Cluster support available. Get the initiator target id.
3985                  * Tell our id to mid-layer too.
3986                  */
3987                 adapter->this_id = *(u32 *)adapter->mega_buffer;
3988                 adapter->host->this_id = adapter->this_id;
3989
3990                 return 1;
3991         }
3992
3993         return 0;
3994 }
3995
3996 #ifdef CONFIG_PROC_FS
3997 /**
3998  * mega_adapinq()
3999  * @adapter - pointer to our soft state
4000  * @dma_handle - DMA address of the buffer
4001  *
4002  * Issue internal commands while interrupts are available.
4003  * We only issue direct mailbox commands from within the driver. ioctl()
4004  * interface using these routines can issue passthru commands.
4005  */
4006 static int
4007 mega_adapinq(adapter_t *adapter, dma_addr_t dma_handle)
4008 {
4009         megacmd_t       mc;
4010
4011         memset(&mc, 0, sizeof(megacmd_t));
4012
4013         if( adapter->flag & BOARD_40LD ) {
4014                 mc.cmd = FC_NEW_CONFIG;
4015                 mc.opcode = NC_SUBOP_ENQUIRY3;
4016                 mc.subopcode = ENQ3_GET_SOLICITED_FULL;
4017         }
4018         else {
4019                 mc.cmd = MEGA_MBOXCMD_ADPEXTINQ;
4020         }
4021
4022         mc.xferaddr = (u32)dma_handle;
4023
4024         if ( mega_internal_command(adapter, &mc, NULL) != 0 ) {
4025                 return -1;
4026         }
4027
4028         return 0;
4029 }
4030
4031
4032 /** mega_internal_dev_inquiry()
4033  * @adapter - pointer to our soft state
4034  * @ch - channel for this device
4035  * @tgt - ID of this device
4036  * @buf_dma_handle - DMA address of the buffer
4037  *
4038  * Issue the scsi inquiry for the specified device.
4039  */
4040 static int
4041 mega_internal_dev_inquiry(adapter_t *adapter, u8 ch, u8 tgt,
4042                 dma_addr_t buf_dma_handle)
4043 {
4044         mega_passthru   *pthru;
4045         dma_addr_t      pthru_dma_handle;
4046         megacmd_t       mc;
4047         int             rval;
4048         struct pci_dev  *pdev;
4049
4050
4051         /*
4052          * For all internal commands, the buffer must be allocated in <4GB
4053          * address range
4054          */
4055         if( make_local_pdev(adapter, &pdev) != 0 ) return -1;
4056
4057         pthru = pci_alloc_consistent(pdev, sizeof(mega_passthru),
4058                         &pthru_dma_handle);
4059
4060         if( pthru == NULL ) {
4061                 free_local_pdev(pdev);
4062                 return -1;
4063         }
4064
4065         pthru->timeout = 2;
4066         pthru->ars = 1;
4067         pthru->reqsenselen = 14;
4068         pthru->islogical = 0;
4069
4070         pthru->channel = (adapter->flag & BOARD_40LD) ? 0 : ch;
4071
4072         pthru->target = (adapter->flag & BOARD_40LD) ? (ch << 4)|tgt : tgt;
4073
4074         pthru->cdblen = 6;
4075
4076         pthru->cdb[0] = INQUIRY;
4077         pthru->cdb[1] = 0;
4078         pthru->cdb[2] = 0;
4079         pthru->cdb[3] = 0;
4080         pthru->cdb[4] = 255;
4081         pthru->cdb[5] = 0;
4082
4083
4084         pthru->dataxferaddr = (u32)buf_dma_handle;
4085         pthru->dataxferlen = 256;
4086
4087         memset(&mc, 0, sizeof(megacmd_t));
4088
4089         mc.cmd = MEGA_MBOXCMD_PASSTHRU;
4090         mc.xferaddr = (u32)pthru_dma_handle;
4091
4092         rval = mega_internal_command(adapter, &mc, pthru);
4093
4094         pci_free_consistent(pdev, sizeof(mega_passthru), pthru,
4095                         pthru_dma_handle);
4096
4097         free_local_pdev(pdev);
4098
4099         return rval;
4100 }
4101 #endif
4102
4103 /**
4104  * mega_internal_command()
4105  * @adapter - pointer to our soft state
4106  * @mc - the mailbox command
4107  * @pthru - Passthru structure for DCDB commands
4108  *
4109  * Issue the internal commands in interrupt mode.
4110  * The last argument is the address of the passthru structure if the command
4111  * to be fired is a passthru command
4112  *
4113  * Note: parameter 'pthru' is null for non-passthru commands.
4114  */
4115 static int
4116 mega_internal_command(adapter_t *adapter, megacmd_t *mc, mega_passthru *pthru)
4117 {
4118         unsigned long flags;
4119         scb_t   *scb;
4120         int     rval;
4121
4122         /*
4123          * The internal commands share one command id and hence are
4124          * serialized. This is so because we want to reserve maximum number of
4125          * available command ids for the I/O commands.
4126          */
4127         mutex_lock(&adapter->int_mtx);
4128
4129         scb = &adapter->int_scb;
4130         memset(scb, 0, sizeof(scb_t));
4131
4132         scb->idx = CMDID_INT_CMDS;
4133         scb->state |= SCB_ACTIVE | SCB_PENDQ;
4134
4135         memcpy(scb->raw_mbox, mc, sizeof(megacmd_t));
4136
4137         /*
4138          * Is it a passthru command
4139          */
4140         if (mc->cmd == MEGA_MBOXCMD_PASSTHRU)
4141                 scb->pthru = pthru;
4142
4143         spin_lock_irqsave(&adapter->lock, flags);
4144         list_add_tail(&scb->list, &adapter->pending_list);
4145         /*
4146          * Check if the HBA is in quiescent state, e.g., during a
4147          * delete logical drive opertion. If it is, don't run
4148          * the pending_list.
4149          */
4150         if (atomic_read(&adapter->quiescent) == 0)
4151                 mega_runpendq(adapter);
4152         spin_unlock_irqrestore(&adapter->lock, flags);
4153
4154         wait_for_completion(&adapter->int_waitq);
4155
4156         mc->status = rval = adapter->int_status;
4157
4158         /*
4159          * Print a debug message for all failed commands. Applications can use
4160          * this information.
4161          */
4162         if (rval && trace_level) {
4163                 dev_info(&adapter->dev->dev, "cmd [%x, %x, %x] status:[%x]\n",
4164                         mc->cmd, mc->opcode, mc->subopcode, rval);
4165         }
4166
4167         mutex_unlock(&adapter->int_mtx);
4168         return rval;
4169 }
4170
4171 static struct scsi_host_template megaraid_template = {
4172         .module                         = THIS_MODULE,
4173         .name                           = "MegaRAID",
4174         .proc_name                      = "megaraid_legacy",
4175         .info                           = megaraid_info,
4176         .queuecommand                   = megaraid_queue,
4177         .bios_param                     = megaraid_biosparam,
4178         .max_sectors                    = MAX_SECTORS_PER_IO,
4179         .can_queue                      = MAX_COMMANDS,
4180         .this_id                        = DEFAULT_INITIATOR_ID,
4181         .sg_tablesize                   = MAX_SGLIST,
4182         .cmd_per_lun                    = DEF_CMD_PER_LUN,
4183         .use_clustering                 = ENABLE_CLUSTERING,
4184         .eh_abort_handler               = megaraid_abort,
4185         .eh_device_reset_handler        = megaraid_reset,
4186         .eh_bus_reset_handler           = megaraid_reset,
4187         .eh_host_reset_handler          = megaraid_reset,
4188         .no_write_same                  = 1,
4189 };
4190
4191 static int
4192 megaraid_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
4193 {
4194         struct Scsi_Host *host;
4195         adapter_t *adapter;
4196         unsigned long mega_baseport, tbase, flag = 0;
4197         u16 subsysid, subsysvid;
4198         u8 pci_bus, pci_dev_func;
4199         int irq, i, j;
4200         int error = -ENODEV;
4201
4202         if (hba_count >= MAX_CONTROLLERS)
4203                 goto out;
4204
4205         if (pci_enable_device(pdev))
4206                 goto out;
4207         pci_set_master(pdev);
4208
4209         pci_bus = pdev->bus->number;
4210         pci_dev_func = pdev->devfn;
4211
4212         /*
4213          * The megaraid3 stuff reports the ID of the Intel part which is not
4214          * remotely specific to the megaraid
4215          */
4216         if (pdev->vendor == PCI_VENDOR_ID_INTEL) {
4217                 u16 magic;
4218                 /*
4219                  * Don't fall over the Compaq management cards using the same
4220                  * PCI identifier
4221                  */
4222                 if (pdev->subsystem_vendor == PCI_VENDOR_ID_COMPAQ &&
4223                     pdev->subsystem_device == 0xC000)
4224                         goto out_disable_device;
4225                 /* Now check the magic signature byte */
4226                 pci_read_config_word(pdev, PCI_CONF_AMISIG, &magic);
4227                 if (magic != HBA_SIGNATURE_471 && magic != HBA_SIGNATURE)
4228                         goto out_disable_device;
4229                 /* Ok it is probably a megaraid */
4230         }
4231
4232         /*
4233          * For these vendor and device ids, signature offsets are not
4234          * valid and 64 bit is implicit
4235          */
4236         if (id->driver_data & BOARD_64BIT)
4237                 flag |= BOARD_64BIT;
4238         else {
4239                 u32 magic64;
4240
4241                 pci_read_config_dword(pdev, PCI_CONF_AMISIG64, &magic64);
4242                 if (magic64 == HBA_SIGNATURE_64BIT)
4243                         flag |= BOARD_64BIT;
4244         }
4245
4246         subsysvid = pdev->subsystem_vendor;
4247         subsysid = pdev->subsystem_device;
4248
4249         dev_notice(&pdev->dev, "found 0x%4.04x:0x%4.04x\n",
4250                 id->vendor, id->device);
4251
4252         /* Read the base port and IRQ from PCI */
4253         mega_baseport = pci_resource_start(pdev, 0);
4254         irq = pdev->irq;
4255
4256         tbase = mega_baseport;
4257         if (pci_resource_flags(pdev, 0) & IORESOURCE_MEM) {
4258                 flag |= BOARD_MEMMAP;
4259
4260                 if (!request_mem_region(mega_baseport, 128, "megaraid")) {
4261                         dev_warn(&pdev->dev, "mem region busy!\n");
4262                         goto out_disable_device;
4263                 }
4264
4265                 mega_baseport = (unsigned long)ioremap(mega_baseport, 128);
4266                 if (!mega_baseport) {
4267                         dev_warn(&pdev->dev, "could not map hba memory\n");
4268                         goto out_release_region;
4269                 }
4270         } else {
4271                 flag |= BOARD_IOMAP;
4272                 mega_baseport += 0x10;
4273
4274                 if (!request_region(mega_baseport, 16, "megaraid"))
4275                         goto out_disable_device;
4276         }
4277
4278         /* Initialize SCSI Host structure */
4279         host = scsi_host_alloc(&megaraid_template, sizeof(adapter_t));
4280         if (!host)
4281                 goto out_iounmap;
4282
4283         adapter = (adapter_t *)host->hostdata;
4284         memset(adapter, 0, sizeof(adapter_t));
4285
4286         dev_notice(&pdev->dev,
4287                 "scsi%d:Found MegaRAID controller at 0x%lx, IRQ:%d\n",
4288                 host->host_no, mega_baseport, irq);
4289
4290         adapter->base = mega_baseport;
4291         if (flag & BOARD_MEMMAP)
4292                 adapter->mmio_base = (void __iomem *) mega_baseport;
4293
4294         INIT_LIST_HEAD(&adapter->free_list);
4295         INIT_LIST_HEAD(&adapter->pending_list);
4296         INIT_LIST_HEAD(&adapter->completed_list);
4297
4298         adapter->flag = flag;
4299         spin_lock_init(&adapter->lock);
4300
4301         host->cmd_per_lun = max_cmd_per_lun;
4302         host->max_sectors = max_sectors_per_io;
4303
4304         adapter->dev = pdev;
4305         adapter->host = host;
4306
4307         adapter->host->irq = irq;
4308
4309         if (flag & BOARD_MEMMAP)
4310                 adapter->host->base = tbase;
4311         else {
4312                 adapter->host->io_port = tbase;
4313                 adapter->host->n_io_port = 16;
4314         }
4315
4316         adapter->host->unique_id = (pci_bus << 8) | pci_dev_func;
4317
4318         /*
4319          * Allocate buffer to issue internal commands.
4320          */
4321         adapter->mega_buffer = pci_alloc_consistent(adapter->dev,
4322                 MEGA_BUFFER_SIZE, &adapter->buf_dma_handle);
4323         if (!adapter->mega_buffer) {
4324                 dev_warn(&pdev->dev, "out of RAM\n");
4325                 goto out_host_put;
4326         }
4327
4328         adapter->scb_list = kmalloc(sizeof(scb_t) * MAX_COMMANDS, GFP_KERNEL);
4329         if (!adapter->scb_list) {
4330                 dev_warn(&pdev->dev, "out of RAM\n");
4331                 goto out_free_cmd_buffer;
4332         }
4333
4334         if (request_irq(irq, (adapter->flag & BOARD_MEMMAP) ?
4335                                 megaraid_isr_memmapped : megaraid_isr_iomapped,
4336                                         IRQF_SHARED, "megaraid", adapter)) {
4337                 dev_warn(&pdev->dev, "Couldn't register IRQ %d!\n", irq);
4338                 goto out_free_scb_list;
4339         }
4340
4341         if (mega_setup_mailbox(adapter))
4342                 goto out_free_irq;
4343
4344         if (mega_query_adapter(adapter))
4345                 goto out_free_mbox;
4346
4347         /*
4348          * Have checks for some buggy f/w
4349          */
4350         if ((subsysid == 0x1111) && (subsysvid == 0x1111)) {
4351                 /*
4352                  * Which firmware
4353                  */
4354                 if (!strcmp(adapter->fw_version, "3.00") ||
4355                                 !strcmp(adapter->fw_version, "3.01")) {
4356
4357                         dev_warn(&pdev->dev,
4358                                 "Your card is a Dell PERC "
4359                                 "2/SC RAID controller with "
4360                                 "firmware\nmegaraid: 3.00 or 3.01.  "
4361                                 "This driver is known to have "
4362                                 "corruption issues\nmegaraid: with "
4363                                 "those firmware versions on this "
4364                                 "specific card.  In order\nmegaraid: "
4365                                 "to protect your data, please upgrade "
4366                                 "your firmware to version\nmegaraid: "
4367                                 "3.10 or later, available from the "
4368                                 "Dell Technical Support web\n"
4369                                 "megaraid: site at\nhttp://support."
4370                                 "dell.com/us/en/filelib/download/"
4371                                 "index.asp?fileid=2940\n"
4372                         );
4373                 }
4374         }
4375
4376         /*
4377          * If we have a HP 1M(0x60E7)/2M(0x60E8) controller with
4378          * firmware H.01.07, H.01.08, and H.01.09 disable 64 bit
4379          * support, since this firmware cannot handle 64 bit
4380          * addressing
4381          */
4382         if ((subsysvid == PCI_VENDOR_ID_HP) &&
4383             ((subsysid == 0x60E7) || (subsysid == 0x60E8))) {
4384                 /*
4385                  * which firmware
4386                  */
4387                 if (!strcmp(adapter->fw_version, "H01.07") ||
4388                     !strcmp(adapter->fw_version, "H01.08") ||
4389                     !strcmp(adapter->fw_version, "H01.09") ) {
4390                         dev_warn(&pdev->dev,
4391                                 "Firmware H.01.07, "
4392                                 "H.01.08, and H.01.09 on 1M/2M "
4393                                 "controllers\n"
4394                                 "do not support 64 bit "
4395                                 "addressing.\nDISABLING "
4396                                 "64 bit support.\n");
4397                         adapter->flag &= ~BOARD_64BIT;
4398                 }
4399         }
4400
4401         if (mega_is_bios_enabled(adapter))
4402                 mega_hbas[hba_count].is_bios_enabled = 1;
4403         mega_hbas[hba_count].hostdata_addr = adapter;
4404
4405         /*
4406          * Find out which channel is raid and which is scsi. This is
4407          * for ROMB support.
4408          */
4409         mega_enum_raid_scsi(adapter);
4410
4411         /*
4412          * Find out if a logical drive is set as the boot drive. If
4413          * there is one, will make that as the first logical drive.
4414          * ROMB: Do we have to boot from a physical drive. Then all
4415          * the physical drives would appear before the logical disks.
4416          * Else, all the physical drives would be exported to the mid
4417          * layer after logical drives.
4418          */
4419         mega_get_boot_drv(adapter);
4420
4421         if (adapter->boot_pdrv_enabled) {
4422                 j = adapter->product_info.nchannels;
4423                 for( i = 0; i < j; i++ )
4424                         adapter->logdrv_chan[i] = 0;
4425                 for( i = j; i < NVIRT_CHAN + j; i++ )
4426                         adapter->logdrv_chan[i] = 1;
4427         } else {
4428                 for (i = 0; i < NVIRT_CHAN; i++)
4429                         adapter->logdrv_chan[i] = 1;
4430                 for (i = NVIRT_CHAN; i < MAX_CHANNELS+NVIRT_CHAN; i++)
4431                         adapter->logdrv_chan[i] = 0;
4432                 adapter->mega_ch_class <<= NVIRT_CHAN;
4433         }
4434
4435         /*
4436          * Do we support random deletion and addition of logical
4437          * drives
4438          */
4439         adapter->read_ldidmap = 0;      /* set it after first logdrv
4440                                                    delete cmd */
4441         adapter->support_random_del = mega_support_random_del(adapter);
4442
4443         /* Initialize SCBs */
4444         if (mega_init_scb(adapter))
4445                 goto out_free_mbox;
4446
4447         /*
4448          * Reset the pending commands counter
4449          */
4450         atomic_set(&adapter->pend_cmds, 0);
4451
4452         /*
4453          * Reset the adapter quiescent flag
4454          */
4455         atomic_set(&adapter->quiescent, 0);
4456
4457         hba_soft_state[hba_count] = adapter;
4458
4459         /*
4460          * Fill in the structure which needs to be passed back to the
4461          * application when it does an ioctl() for controller related
4462          * information.
4463          */
4464         i = hba_count;
4465
4466         mcontroller[i].base = mega_baseport;
4467         mcontroller[i].irq = irq;
4468         mcontroller[i].numldrv = adapter->numldrv;
4469         mcontroller[i].pcibus = pci_bus;
4470         mcontroller[i].pcidev = id->device;
4471         mcontroller[i].pcifun = PCI_FUNC (pci_dev_func);
4472         mcontroller[i].pciid = -1;
4473         mcontroller[i].pcivendor = id->vendor;
4474         mcontroller[i].pcislot = PCI_SLOT(pci_dev_func);
4475         mcontroller[i].uid = (pci_bus << 8) | pci_dev_func;
4476
4477
4478         /* Set the Mode of addressing to 64 bit if we can */
4479         if ((adapter->flag & BOARD_64BIT) && (sizeof(dma_addr_t) == 8)) {
4480                 pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
4481                 adapter->has_64bit_addr = 1;
4482         } else  {
4483                 pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
4484                 adapter->has_64bit_addr = 0;
4485         }
4486
4487         mutex_init(&adapter->int_mtx);
4488         init_completion(&adapter->int_waitq);
4489
4490         adapter->this_id = DEFAULT_INITIATOR_ID;
4491         adapter->host->this_id = DEFAULT_INITIATOR_ID;
4492
4493 #if MEGA_HAVE_CLUSTERING
4494         /*
4495          * Is cluster support enabled on this controller
4496          * Note: In a cluster the HBAs ( the initiators ) will have
4497          * different target IDs and we cannot assume it to be 7. Call
4498          * to mega_support_cluster() will get the target ids also if
4499          * the cluster support is available
4500          */
4501         adapter->has_cluster = mega_support_cluster(adapter);
4502         if (adapter->has_cluster) {
4503                 dev_notice(&pdev->dev,
4504                         "Cluster driver, initiator id:%d\n",
4505                         adapter->this_id);
4506         }
4507 #endif
4508
4509         pci_set_drvdata(pdev, host);
4510
4511         mega_create_proc_entry(hba_count, mega_proc_dir_entry);
4512
4513         error = scsi_add_host(host, &pdev->dev);
4514         if (error)
4515                 goto out_free_mbox;
4516
4517         scsi_scan_host(host);
4518         hba_count++;
4519         return 0;
4520
4521  out_free_mbox:
4522         pci_free_consistent(adapter->dev, sizeof(mbox64_t),
4523                         adapter->una_mbox64, adapter->una_mbox64_dma);
4524  out_free_irq:
4525         free_irq(adapter->host->irq, adapter);
4526  out_free_scb_list:
4527         kfree(adapter->scb_list);
4528  out_free_cmd_buffer:
4529         pci_free_consistent(adapter->dev, MEGA_BUFFER_SIZE,
4530                         adapter->mega_buffer, adapter->buf_dma_handle);
4531  out_host_put:
4532         scsi_host_put(host);
4533  out_iounmap:
4534         if (flag & BOARD_MEMMAP)
4535                 iounmap((void *)mega_baseport);
4536  out_release_region:
4537         if (flag & BOARD_MEMMAP)
4538                 release_mem_region(tbase, 128);
4539         else
4540                 release_region(mega_baseport, 16);
4541  out_disable_device:
4542         pci_disable_device(pdev);
4543  out:
4544         return error;
4545 }
4546
4547 static void
4548 __megaraid_shutdown(adapter_t *adapter)
4549 {
4550         u_char  raw_mbox[sizeof(struct mbox_out)];
4551         mbox_t  *mbox = (mbox_t *)raw_mbox;
4552         int     i;
4553
4554         /* Flush adapter cache */
4555         memset(&mbox->m_out, 0, sizeof(raw_mbox));
4556         raw_mbox[0] = FLUSH_ADAPTER;
4557
4558         free_irq(adapter->host->irq, adapter);
4559
4560         /* Issue a blocking (interrupts disabled) command to the card */
4561         issue_scb_block(adapter, raw_mbox);
4562
4563         /* Flush disks cache */
4564         memset(&mbox->m_out, 0, sizeof(raw_mbox));
4565         raw_mbox[0] = FLUSH_SYSTEM;
4566
4567         /* Issue a blocking (interrupts disabled) command to the card */
4568         issue_scb_block(adapter, raw_mbox);
4569
4570         if (atomic_read(&adapter->pend_cmds) > 0)
4571                 dev_warn(&adapter->dev->dev, "pending commands!!\n");
4572
4573         /*
4574          * Have a delibrate delay to make sure all the caches are
4575          * actually flushed.
4576          */
4577         for (i = 0; i <= 10; i++)
4578                 mdelay(1000);
4579 }
4580
4581 static void
4582 megaraid_remove_one(struct pci_dev *pdev)
4583 {
4584         struct Scsi_Host *host = pci_get_drvdata(pdev);
4585         adapter_t *adapter = (adapter_t *)host->hostdata;
4586
4587         scsi_remove_host(host);
4588
4589         __megaraid_shutdown(adapter);
4590
4591         /* Free our resources */
4592         if (adapter->flag & BOARD_MEMMAP) {
4593                 iounmap((void *)adapter->base);
4594                 release_mem_region(adapter->host->base, 128);
4595         } else
4596                 release_region(adapter->base, 16);
4597
4598         mega_free_sgl(adapter);
4599
4600 #ifdef CONFIG_PROC_FS
4601         if (adapter->controller_proc_dir_entry) {
4602                 remove_proc_entry("stat", adapter->controller_proc_dir_entry);
4603                 remove_proc_entry("config",
4604                                 adapter->controller_proc_dir_entry);
4605                 remove_proc_entry("mailbox",
4606                                 adapter->controller_proc_dir_entry);
4607 #if MEGA_HAVE_ENH_PROC
4608                 remove_proc_entry("rebuild-rate",
4609                                 adapter->controller_proc_dir_entry);
4610                 remove_proc_entry("battery-status",
4611                                 adapter->controller_proc_dir_entry);
4612
4613                 remove_proc_entry("diskdrives-ch0",
4614                                 adapter->controller_proc_dir_entry);
4615                 remove_proc_entry("diskdrives-ch1",
4616                                 adapter->controller_proc_dir_entry);
4617                 remove_proc_entry("diskdrives-ch2",
4618                                 adapter->controller_proc_dir_entry);
4619                 remove_proc_entry("diskdrives-ch3",
4620                                 adapter->controller_proc_dir_entry);
4621
4622                 remove_proc_entry("raiddrives-0-9",
4623                                 adapter->controller_proc_dir_entry);
4624                 remove_proc_entry("raiddrives-10-19",
4625                                 adapter->controller_proc_dir_entry);
4626                 remove_proc_entry("raiddrives-20-29",
4627                                 adapter->controller_proc_dir_entry);
4628                 remove_proc_entry("raiddrives-30-39",
4629                                 adapter->controller_proc_dir_entry);
4630 #endif
4631                 {
4632                         char    buf[12] = { 0 };
4633                         sprintf(buf, "hba%d", adapter->host->host_no);
4634                         remove_proc_entry(buf, mega_proc_dir_entry);
4635                 }
4636         }
4637 #endif
4638
4639         pci_free_consistent(adapter->dev, MEGA_BUFFER_SIZE,
4640                         adapter->mega_buffer, adapter->buf_dma_handle);
4641         kfree(adapter->scb_list);
4642         pci_free_consistent(adapter->dev, sizeof(mbox64_t),
4643                         adapter->una_mbox64, adapter->una_mbox64_dma);
4644
4645         scsi_host_put(host);
4646         pci_disable_device(pdev);
4647
4648         hba_count--;
4649 }
4650
4651 static void
4652 megaraid_shutdown(struct pci_dev *pdev)
4653 {
4654         struct Scsi_Host *host = pci_get_drvdata(pdev);
4655         adapter_t *adapter = (adapter_t *)host->hostdata;
4656
4657         __megaraid_shutdown(adapter);
4658 }
4659
4660 static struct pci_device_id megaraid_pci_tbl[] = {
4661         {PCI_VENDOR_ID_AMI, PCI_DEVICE_ID_AMI_MEGARAID,
4662                 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
4663         {PCI_VENDOR_ID_AMI, PCI_DEVICE_ID_AMI_MEGARAID2,
4664                 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
4665         {PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_AMI_MEGARAID3,
4666                 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
4667         {0,}
4668 };
4669 MODULE_DEVICE_TABLE(pci, megaraid_pci_tbl);
4670
4671 static struct pci_driver megaraid_pci_driver = {
4672         .name           = "megaraid_legacy",
4673         .id_table       = megaraid_pci_tbl,
4674         .probe          = megaraid_probe_one,
4675         .remove         = megaraid_remove_one,
4676         .shutdown       = megaraid_shutdown,
4677 };
4678
4679 static int __init megaraid_init(void)
4680 {
4681         int error;
4682
4683         if ((max_cmd_per_lun <= 0) || (max_cmd_per_lun > MAX_CMD_PER_LUN))
4684                 max_cmd_per_lun = MAX_CMD_PER_LUN;
4685         if (max_mbox_busy_wait > MBOX_BUSY_WAIT)
4686                 max_mbox_busy_wait = MBOX_BUSY_WAIT;
4687
4688 #ifdef CONFIG_PROC_FS
4689         mega_proc_dir_entry = proc_mkdir("megaraid", NULL);
4690         if (!mega_proc_dir_entry) {
4691                 printk(KERN_WARNING
4692                                 "megaraid: failed to create megaraid root\n");
4693         }
4694 #endif
4695         error = pci_register_driver(&megaraid_pci_driver);
4696         if (error) {
4697 #ifdef CONFIG_PROC_FS
4698                 remove_proc_entry("megaraid", NULL);
4699 #endif
4700                 return error;
4701         }
4702
4703         /*
4704          * Register the driver as a character device, for applications
4705          * to access it for ioctls.
4706          * First argument (major) to register_chrdev implies a dynamic
4707          * major number allocation.
4708          */
4709         major = register_chrdev(0, "megadev_legacy", &megadev_fops);
4710         if (!major) {
4711                 printk(KERN_WARNING
4712                                 "megaraid: failed to register char device\n");
4713         }
4714
4715         return 0;
4716 }
4717
4718 static void __exit megaraid_exit(void)
4719 {
4720         /*
4721          * Unregister the character device interface to the driver.
4722          */
4723         unregister_chrdev(major, "megadev_legacy");
4724
4725         pci_unregister_driver(&megaraid_pci_driver);
4726
4727 #ifdef CONFIG_PROC_FS
4728         remove_proc_entry("megaraid", NULL);
4729 #endif
4730 }
4731
4732 module_init(megaraid_init);
4733 module_exit(megaraid_exit);
4734
4735 /* vi: set ts=8 sw=8 tw=78: */