drivers/scsi/megaraid.c

   1 /*
   2  *
   3  *                      Linux MegaRAID device driver
   4  *
   5  * Copyright (c) 2002  LSI Logic Corporation.
   6  *
   7  *         This program is free software; you can redistribute it and/or
   8  *         modify it under the terms of the GNU General Public License
   9  *         as published by the Free Software Foundation; either version
  10  *         2 of the License, or (at your option) any later version.
  11  *
  12  * Copyright (c) 2002  Red Hat, Inc. All rights reserved.
  13  *        - fixes
  14  *        - speed-ups (list handling fixes, issued_list, optimizations.)
  15  *        - lots of cleanups.
  16  *
  17  * Copyright (c) 2003  Christoph Hellwig  <hch@lst.de>
  18  *        - new-style, hotplug-aware pci probing and scsi registration
  19  *
  20  * Version : v2.00.4 Mon Nov 14 14:02:43 EST 2005 - Seokmann Ju
  21  *                                              <Seokmann.Ju@lsil.com>
  22  *
  23  * Description: Linux device driver for LSI Logic MegaRAID controller
  24  *
  25  * Supported controllers: MegaRAID 418, 428, 438, 466, 762, 467, 471, 490, 493
  26  *                                      518, 520, 531, 532
  27  *
  28  * This driver is supported by LSI Logic, with assistance from Red Hat, Dell,
  29  * and others. Please send updates to the mailing list
  30  * linux-scsi@vger.kernel.org .
  31  *
  32  */
  33
  34 #include <linux/mm.h>
  35 #include <linux/fs.h>
  36 #include <linux/blkdev.h>
  37 #include <asm/uaccess.h>
  38 #include <asm/io.h>
  39 #include <linux/completion.h>
  40 #include <linux/delay.h>
  41 #include <linux/proc_fs.h>
  42 #include <linux/seq_file.h>
  43 #include <linux/reboot.h>
  44 #include <linux/module.h>
  45 #include <linux/list.h>
  46 #include <linux/interrupt.h>
  47 #include <linux/pci.h>
  48 #include <linux/init.h>
  49 #include <linux/dma-mapping.h>
  50 #include <linux/mutex.h>
  51 #include <linux/slab.h>
  52 #include <scsi/scsicam.h>
  53
  54 #include "scsi.h"
  55 #include <scsi/scsi_host.h>
  56
  57 #include "megaraid.h"
  58
  59 #define MEGARAID_MODULE_VERSION "2.00.4"
  60
  61 MODULE_AUTHOR ("sju@lsil.com");
  62 MODULE_DESCRIPTION ("LSI Logic MegaRAID legacy driver");
  63 MODULE_LICENSE ("GPL");
  64 MODULE_VERSION(MEGARAID_MODULE_VERSION);
  65
  66 static DEFINE_MUTEX(megadev_mutex);
  67 static unsigned int max_cmd_per_lun = DEF_CMD_PER_LUN;
  68 module_param(max_cmd_per_lun, uint, 0);
  69 MODULE_PARM_DESC(max_cmd_per_lun, "Maximum number of commands which can be issued to a single LUN (default=DEF_CMD_PER_LUN=63)");
  70
  71 static unsigned short int max_sectors_per_io = MAX_SECTORS_PER_IO;
  72 module_param(max_sectors_per_io, ushort, 0);
  73 MODULE_PARM_DESC(max_sectors_per_io, "Maximum number of sectors per I/O request (default=MAX_SECTORS_PER_IO=128)");
  74
  75
  76 static unsigned short int max_mbox_busy_wait = MBOX_BUSY_WAIT;
  77 module_param(max_mbox_busy_wait, ushort, 0);
  78 MODULE_PARM_DESC(max_mbox_busy_wait, "Maximum wait for mailbox in microseconds if busy (default=MBOX_BUSY_WAIT=10)");
  79
  80 #define RDINDOOR(adapter)       readl((adapter)->mmio_base + 0x20)
  81 #define RDOUTDOOR(adapter)      readl((adapter)->mmio_base + 0x2C)
  82 #define WRINDOOR(adapter,value)  writel(value, (adapter)->mmio_base + 0x20)
  83 #define WROUTDOOR(adapter,value) writel(value, (adapter)->mmio_base + 0x2C)
  84
  85 /*
  86  * Global variables
  87  */
  88
  89 static int hba_count;
  90 static adapter_t *hba_soft_state[MAX_CONTROLLERS];
  91 static struct proc_dir_entry *mega_proc_dir_entry;
  92
  93 /* For controller re-ordering */
  94 static struct mega_hbas mega_hbas[MAX_CONTROLLERS];
  95
  96 static long
  97 megadev_unlocked_ioctl(struct file *filep, unsigned int cmd, unsigned long arg);
  98
  99 /*
 100  * The File Operations structure for the serial/ioctl interface of the driver
 101  */
 102 static const struct file_operations megadev_fops = {
 103         .owner          = THIS_MODULE,
 104         .unlocked_ioctl = megadev_unlocked_ioctl,
 105         .open           = megadev_open,
 106         .llseek         = noop_llseek,
 107 };
 108
 109 /*
 110  * Array to structures for storing the information about the controllers. This
 111  * information is sent to the user level applications, when they do an ioctl
 112  * for this information.
 113  */
 114 static struct mcontroller mcontroller[MAX_CONTROLLERS];
 115
 116 /* The current driver version */
 117 static u32 driver_ver = 0x02000000;
 118
 119 /* major number used by the device for character interface */
 120 static int major;
 121
 122 #define IS_RAID_CH(hba, ch)     (((hba)->mega_ch_class >> (ch)) & 0x01)
 123
 124
 125 /*
 126  * Debug variable to print some diagnostic messages
 127  */
 128 static int trace_level;
 129
 130 /**
 131  * mega_setup_mailbox()
 132  * @adapter - pointer to our soft state
 133  *
 134  * Allocates a 8 byte aligned memory for the handshake mailbox.
 135  */
 136 static int
 137 mega_setup_mailbox(adapter_t *adapter)
 138 {
 139         unsigned long   align;
 140
 141         adapter->una_mbox64 = pci_alloc_consistent(adapter->dev,
 142                         sizeof(mbox64_t), &adapter->una_mbox64_dma);
 143
 144         if( !adapter->una_mbox64 ) return -1;
 145
 146         adapter->mbox = &adapter->una_mbox64->mbox;
 147
 148         adapter->mbox = (mbox_t *)((((unsigned long) adapter->mbox) + 15) &
 149                         (~0UL ^ 0xFUL));
 150
 151         adapter->mbox64 = (mbox64_t *)(((unsigned long)adapter->mbox) - 8);
 152
 153         align = ((void *)adapter->mbox) - ((void *)&adapter->una_mbox64->mbox);
 154
 155         adapter->mbox_dma = adapter->una_mbox64_dma + 8 + align;
 156
 157         /*
 158          * Register the mailbox if the controller is an io-mapped controller
 159          */
 160         if( adapter->flag & BOARD_IOMAP ) {
 161
 162                 outb(adapter->mbox_dma & 0xFF,
 163                                 adapter->host->io_port + MBOX_PORT0);
 164
 165                 outb((adapter->mbox_dma >> 8) & 0xFF,
 166                                 adapter->host->io_port + MBOX_PORT1);
 167
 168                 outb((adapter->mbox_dma >> 16) & 0xFF,
 169                                 adapter->host->io_port + MBOX_PORT2);
 170
 171                 outb((adapter->mbox_dma >> 24) & 0xFF,
 172                                 adapter->host->io_port + MBOX_PORT3);
 173
 174                 outb(ENABLE_MBOX_BYTE,
 175                                 adapter->host->io_port + ENABLE_MBOX_REGION);
 176
 177                 irq_ack(adapter);
 178
 179                 irq_enable(adapter);
 180         }
 181
 182         return 0;
 183 }
 184
 185
 186 /*
 187  * mega_query_adapter()
 188  * @adapter - pointer to our soft state
 189  *
 190  * Issue the adapter inquiry commands to the controller and find out
 191  * information and parameter about the devices attached
 192  */
 193 static int
 194 mega_query_adapter(adapter_t *adapter)
 195 {
 196         dma_addr_t      prod_info_dma_handle;
 197         mega_inquiry3   *inquiry3;
 198         u8      raw_mbox[sizeof(struct mbox_out)];
 199         mbox_t  *mbox;
 200         int     retval;
 201
 202         /* Initialize adapter inquiry mailbox */
 203
 204         mbox = (mbox_t *)raw_mbox;
 205
 206         memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
 207         memset(&mbox->m_out, 0, sizeof(raw_mbox));
 208
 209         /*
 210          * Try to issue Inquiry3 command
 211          * if not succeeded, then issue MEGA_MBOXCMD_ADAPTERINQ command and
 212          * update enquiry3 structure
 213          */
 214         mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;
 215
 216         inquiry3 = (mega_inquiry3 *)adapter->mega_buffer;
 217
 218         raw_mbox[0] = FC_NEW_CONFIG;            /* i.e. mbox->cmd=0xA1 */
 219         raw_mbox[2] = NC_SUBOP_ENQUIRY3;        /* i.e. 0x0F */
 220         raw_mbox[3] = ENQ3_GET_SOLICITED_FULL;  /* i.e. 0x02 */
 221
 222         /* Issue a blocking command to the card */
 223         if ((retval = issue_scb_block(adapter, raw_mbox))) {
 224                 /* the adapter does not support 40ld */
 225
 226                 mraid_ext_inquiry       *ext_inq;
 227                 mraid_inquiry           *inq;
 228                 dma_addr_t              dma_handle;
 229
 230                 ext_inq = pci_alloc_consistent(adapter->dev,
 231                                 sizeof(mraid_ext_inquiry), &dma_handle);
 232
 233                 if( ext_inq == NULL ) return -1;
 234
 235                 inq = &ext_inq->raid_inq;
 236
 237                 mbox->m_out.xferaddr = (u32)dma_handle;
 238
 239                 /*issue old 0x04 command to adapter */
 240                 mbox->m_out.cmd = MEGA_MBOXCMD_ADPEXTINQ;
 241
 242                 issue_scb_block(adapter, raw_mbox);
 243
 244                 /*
 245                  * update Enquiry3 and ProductInfo structures with
 246                  * mraid_inquiry structure
 247                  */
 248                 mega_8_to_40ld(inq, inquiry3,
 249                                 (mega_product_info *)&adapter->product_info);
 250
 251                 pci_free_consistent(adapter->dev, sizeof(mraid_ext_inquiry),
 252                                 ext_inq, dma_handle);
 253
 254         } else {                /*adapter supports 40ld */
 255                 adapter->flag |= BOARD_40LD;
 256
 257                 /*
 258                  * get product_info, which is static information and will be
 259                  * unchanged
 260                  */
 261                 prod_info_dma_handle = pci_map_single(adapter->dev, (void *)
 262                                 &adapter->product_info,
 263                                 sizeof(mega_product_info), PCI_DMA_FROMDEVICE);
 264
 265                 mbox->m_out.xferaddr = prod_info_dma_handle;
 266
 267                 raw_mbox[0] = FC_NEW_CONFIG;    /* i.e. mbox->cmd=0xA1 */
 268                 raw_mbox[2] = NC_SUBOP_PRODUCT_INFO;    /* i.e. 0x0E */
 269
 270                 if ((retval = issue_scb_block(adapter, raw_mbox)))
 271                         printk(KERN_WARNING
 272                         "megaraid: Product_info cmd failed with error: %d\n",
 273                                 retval);
 274
 275                 pci_unmap_single(adapter->dev, prod_info_dma_handle,
 276                                 sizeof(mega_product_info), PCI_DMA_FROMDEVICE);
 277         }
 278
 279
 280         /*
 281          * kernel scans the channels from 0 to <= max_channel
 282          */
 283         adapter->host->max_channel =
 284                 adapter->product_info.nchannels + NVIRT_CHAN -1;
 285
 286         adapter->host->max_id = 16;     /* max targets per channel */
 287
 288         adapter->host->max_lun = 7;     /* Up to 7 luns for non disk devices */
 289
 290         adapter->host->cmd_per_lun = max_cmd_per_lun;
 291
 292         adapter->numldrv = inquiry3->num_ldrv;
 293
 294         adapter->max_cmds = adapter->product_info.max_commands;
 295
 296         if(adapter->max_cmds > MAX_COMMANDS)
 297                 adapter->max_cmds = MAX_COMMANDS;
 298
 299         adapter->host->can_queue = adapter->max_cmds - 1;
 300
 301         /*
 302          * Get the maximum number of scatter-gather elements supported by this
 303          * firmware
 304          */
 305         mega_get_max_sgl(adapter);
 306
 307         adapter->host->sg_tablesize = adapter->sglen;
 308
 309         /* use HP firmware and bios version encoding
 310            Note: fw_version[0|1] and bios_version[0|1] were originally shifted
 311            right 8 bits making them zero. This 0 value was hardcoded to fix
 312            sparse warnings. */
 313         if (adapter->product_info.subsysvid == PCI_VENDOR_ID_HP) {
 314                 sprintf (adapter->fw_version, "%c%d%d.%d%d",
 315                          adapter->product_info.fw_version[2],
 316                          0,
 317                          adapter->product_info.fw_version[1] & 0x0f,
 318                          0,
 319                          adapter->product_info.fw_version[0] & 0x0f);
 320                 sprintf (adapter->bios_version, "%c%d%d.%d%d",
 321                          adapter->product_info.bios_version[2],
 322                          0,
 323                          adapter->product_info.bios_version[1] & 0x0f,
 324                          0,
 325                          adapter->product_info.bios_version[0] & 0x0f);
 326         } else {
 327                 memcpy(adapter->fw_version,
 328                                 (char *)adapter->product_info.fw_version, 4);
 329                 adapter->fw_version[4] = 0;
 330
 331                 memcpy(adapter->bios_version,
 332                                 (char *)adapter->product_info.bios_version, 4);
 333
 334                 adapter->bios_version[4] = 0;
 335         }
 336
 337         printk(KERN_NOTICE "megaraid: [%s:%s] detected %d logical drives.\n",
 338                 adapter->fw_version, adapter->bios_version, adapter->numldrv);
 339
 340         /*
 341          * Do we support extended (>10 bytes) cdbs
 342          */
 343         adapter->support_ext_cdb = mega_support_ext_cdb(adapter);
 344         if (adapter->support_ext_cdb)
 345                 printk(KERN_NOTICE "megaraid: supports extended CDBs.\n");
 346
 347
 348         return 0;
 349 }
 350
 351 /**
 352  * mega_runpendq()
 353  * @adapter - pointer to our soft state
 354  *
 355  * Runs through the list of pending requests.
 356  */
 357 static inline void
 358 mega_runpendq(adapter_t *adapter)
 359 {
 360         if(!list_empty(&adapter->pending_list))
 361                 __mega_runpendq(adapter);
 362 }
 363
 364 /*
 365  * megaraid_queue()
 366  * @scmd - Issue this scsi command
 367  * @done - the callback hook into the scsi mid-layer
 368  *
 369  * The command queuing entry point for the mid-layer.
 370  */
 371 static int
 372 megaraid_queue_lck(Scsi_Cmnd *scmd, void (*done)(Scsi_Cmnd *))
 373 {
 374         adapter_t       *adapter;
 375         scb_t   *scb;
 376         int     busy=0;
 377         unsigned long flags;
 378
 379         adapter = (adapter_t *)scmd->device->host->hostdata;
 380
 381         scmd->scsi_done = done;
 382
 383
 384         /*
 385          * Allocate and build a SCB request
 386          * busy flag will be set if mega_build_cmd() command could not
 387          * allocate scb. We will return non-zero status in that case.
 388          * NOTE: scb can be null even though certain commands completed
 389          * successfully, e.g., MODE_SENSE and TEST_UNIT_READY, we would
 390          * return 0 in that case.
 391          */
 392
 393         spin_lock_irqsave(&adapter->lock, flags);
 394         scb = mega_build_cmd(adapter, scmd, &busy);
 395         if (!scb)
 396                 goto out;
 397
 398         scb->state |= SCB_PENDQ;
 399         list_add_tail(&scb->list, &adapter->pending_list);
 400
 401         /*
 402          * Check if the HBA is in quiescent state, e.g., during a
 403          * delete logical drive opertion. If it is, don't run
 404          * the pending_list.
 405          */
 406         if (atomic_read(&adapter->quiescent) == 0)
 407                 mega_runpendq(adapter);
 408
 409         busy = 0;
 410  out:
 411         spin_unlock_irqrestore(&adapter->lock, flags);
 412         return busy;
 413 }
 414
 415 static DEF_SCSI_QCMD(megaraid_queue)
 416
 417 /**
 418  * mega_allocate_scb()
 419  * @adapter - pointer to our soft state
 420  * @cmd - scsi command from the mid-layer
 421  *
 422  * Allocate a SCB structure. This is the central structure for controller
 423  * commands.
 424  */
 425 static inline scb_t *
 426 mega_allocate_scb(adapter_t *adapter, Scsi_Cmnd *cmd)
 427 {
 428         struct list_head *head = &adapter->free_list;
 429         scb_t   *scb;
 430
 431         /* Unlink command from Free List */
 432         if( !list_empty(head) ) {
 433
 434                 scb = list_entry(head->next, scb_t, list);
 435
 436                 list_del_init(head->next);
 437
 438                 scb->state = SCB_ACTIVE;
 439                 scb->cmd = cmd;
 440                 scb->dma_type = MEGA_DMA_TYPE_NONE;
 441
 442                 return scb;
 443         }
 444
 445         return NULL;
 446 }
 447
 448 /**
 449  * mega_get_ldrv_num()
 450  * @adapter - pointer to our soft state
 451  * @cmd - scsi mid layer command
 452  * @channel - channel on the controller
 453  *
 454  * Calculate the logical drive number based on the information in scsi command
 455  * and the channel number.
 456  */
 457 static inline int
 458 mega_get_ldrv_num(adapter_t *adapter, Scsi_Cmnd *cmd, int channel)
 459 {
 460         int             tgt;
 461         int             ldrv_num;
 462
 463         tgt = cmd->device->id;
 464
 465         if ( tgt > adapter->this_id )
 466                 tgt--;  /* we do not get inquires for initiator id */
 467
 468         ldrv_num = (channel * 15) + tgt;
 469
 470
 471         /*
 472          * If we have a logical drive with boot enabled, project it first
 473          */
 474         if( adapter->boot_ldrv_enabled ) {
 475                 if( ldrv_num == 0 ) {
 476                         ldrv_num = adapter->boot_ldrv;
 477                 }
 478                 else {
 479                         if( ldrv_num <= adapter->boot_ldrv ) {
 480                                 ldrv_num--;
 481                         }
 482                 }
 483         }
 484
 485         /*
 486          * If "delete logical drive" feature is enabled on this controller.
 487          * Do only if at least one delete logical drive operation was done.
 488          *
 489          * Also, after logical drive deletion, instead of logical drive number,
 490          * the value returned should be 0x80+logical drive id.
 491          *
 492          * These is valid only for IO commands.
 493          */
 494
 495         if (adapter->support_random_del && adapter->read_ldidmap )
 496                 switch (cmd->cmnd[0]) {
 497                 case READ_6:    /* fall through */
 498                 case WRITE_6:   /* fall through */
 499                 case READ_10:   /* fall through */
 500                 case WRITE_10:
 501                         ldrv_num += 0x80;
 502                 }
 503
 504         return ldrv_num;
 505 }
 506
 507 /**
 508  * mega_build_cmd()
 509  * @adapter - pointer to our soft state
 510  * @cmd - Prepare using this scsi command
 511  * @busy - busy flag if no resources
 512  *
 513  * Prepares a command and scatter gather list for the controller. This routine
 514  * also finds out if the commands is intended for a logical drive or a
 515  * physical device and prepares the controller command accordingly.
 516  *
 517  * We also re-order the logical drives and physical devices based on their
 518  * boot settings.
 519  */
 520 static scb_t *
 521 mega_build_cmd(adapter_t *adapter, Scsi_Cmnd *cmd, int *busy)
 522 {
 523         mega_ext_passthru       *epthru;
 524         mega_passthru   *pthru;
 525         scb_t   *scb;
 526         mbox_t  *mbox;
 527         u32     seg;
 528         char    islogical;
 529         int     max_ldrv_num;
 530         int     channel = 0;
 531         int     target = 0;
 532         int     ldrv_num = 0;   /* logical drive number */
 533
 534
 535         /*
 536          * filter the internal and ioctl commands
 537          */
 538         if((cmd->cmnd[0] == MEGA_INTERNAL_CMD))
 539                 return (scb_t *)cmd->host_scribble;
 540
 541         /*
 542          * We know what channels our logical drives are on - mega_find_card()
 543          */
 544         islogical = adapter->logdrv_chan[cmd->device->channel];
 545
 546         /*
 547          * The theory: If physical drive is chosen for boot, all the physical
 548          * devices are exported before the logical drives, otherwise physical
 549          * devices are pushed after logical drives, in which case - Kernel sees
 550          * the physical devices on virtual channel which is obviously converted
 551          * to actual channel on the HBA.
 552          */
 553         if( adapter->boot_pdrv_enabled ) {
 554                 if( islogical ) {
 555                         /* logical channel */
 556                         channel = cmd->device->channel -
 557                                 adapter->product_info.nchannels;
 558                 }
 559                 else {
 560                         /* this is physical channel */
 561                         channel = cmd->device->channel;
 562                         target = cmd->device->id;
 563
 564                         /*
 565                          * boot from a physical disk, that disk needs to be
 566                          * exposed first IF both the channels are SCSI, then
 567                          * booting from the second channel is not allowed.
 568                          */
 569                         if( target == 0 ) {
 570                                 target = adapter->boot_pdrv_tgt;
 571                         }
 572                         else if( target == adapter->boot_pdrv_tgt ) {
 573                                 target = 0;
 574                         }
 575                 }
 576         }
 577         else {
 578                 if( islogical ) {
 579                         /* this is the logical channel */
 580                         channel = cmd->device->channel;
 581                 }
 582                 else {
 583                         /* physical channel */
 584                         channel = cmd->device->channel - NVIRT_CHAN;
 585                         target = cmd->device->id;
 586                 }
 587         }
 588
 589
 590         if(islogical) {
 591
 592                 /* have just LUN 0 for each target on virtual channels */
 593                 if (cmd->device->lun) {
 594                         cmd->result = (DID_BAD_TARGET << 16);
 595                         cmd->scsi_done(cmd);
 596                         return NULL;
 597                 }
 598
 599                 ldrv_num = mega_get_ldrv_num(adapter, cmd, channel);
 600
 601
 602                 max_ldrv_num = (adapter->flag & BOARD_40LD) ?
 603                         MAX_LOGICAL_DRIVES_40LD : MAX_LOGICAL_DRIVES_8LD;
 604
 605                 /*
 606                  * max_ldrv_num increases by 0x80 if some logical drive was
 607                  * deleted.
 608                  */
 609                 if(adapter->read_ldidmap)
 610                         max_ldrv_num += 0x80;
 611
 612                 if(ldrv_num > max_ldrv_num ) {
 613                         cmd->result = (DID_BAD_TARGET << 16);
 614                         cmd->scsi_done(cmd);
 615                         return NULL;
 616                 }
 617
 618         }
 619         else {
 620                 if( cmd->device->lun > 7) {
 621                         /*
 622                          * Do not support lun >7 for physically accessed
 623                          * devices
 624                          */
 625                         cmd->result = (DID_BAD_TARGET << 16);
 626                         cmd->scsi_done(cmd);
 627                         return NULL;
 628                 }
 629         }
 630
 631         /*
 632          *
 633          * Logical drive commands
 634          *
 635          */
 636         if(islogical) {
 637                 switch (cmd->cmnd[0]) {
 638                 case TEST_UNIT_READY:
 639 #if MEGA_HAVE_CLUSTERING
 640                         /*
 641                          * Do we support clustering and is the support enabled
 642                          * If no, return success always
 643                          */
 644                         if( !adapter->has_cluster ) {
 645                                 cmd->result = (DID_OK << 16);
 646                                 cmd->scsi_done(cmd);
 647                                 return NULL;
 648                         }
 649
 650                         if(!(scb = mega_allocate_scb(adapter, cmd))) {
 651                                 *busy = 1;
 652                                 return NULL;
 653                         }
 654
 655                         scb->raw_mbox[0] = MEGA_CLUSTER_CMD;
 656                         scb->raw_mbox[2] = MEGA_RESERVATION_STATUS;
 657                         scb->raw_mbox[3] = ldrv_num;
 658
 659                         scb->dma_direction = PCI_DMA_NONE;
 660
 661                         return scb;
 662 #else
 663                         cmd->result = (DID_OK << 16);
 664                         cmd->scsi_done(cmd);
 665                         return NULL;
 666 #endif
 667
 668                 case MODE_SENSE: {
 669                         char *buf;
 670                         struct scatterlist *sg;
 671
 672                         sg = scsi_sglist(cmd);
 673                         buf = kmap_atomic(sg_page(sg)) + sg->offset;
 674
 675                         memset(buf, 0, cmd->cmnd[4]);
 676                         kunmap_atomic(buf - sg->offset);
 677
 678                         cmd->result = (DID_OK << 16);
 679                         cmd->scsi_done(cmd);
 680                         return NULL;
 681                 }
 682
 683                 case READ_CAPACITY:
 684                 case INQUIRY:
 685
 686                         if(!(adapter->flag & (1L << cmd->device->channel))) {
 687
 688                                 printk(KERN_NOTICE
 689                                         "scsi%d: scanning scsi channel %d ",
 690                                                 adapter->host->host_no,
 691                                                 cmd->device->channel);
 692                                 printk("for logical drives.\n");
 693
 694                                 adapter->flag |= (1L << cmd->device->channel);
 695                         }
 696
 697                         /* Allocate a SCB and initialize passthru */
 698                         if(!(scb = mega_allocate_scb(adapter, cmd))) {
 699                                 *busy = 1;
 700                                 return NULL;
 701                         }
 702                         pthru = scb->pthru;
 703
 704                         mbox = (mbox_t *)scb->raw_mbox;
 705                         memset(mbox, 0, sizeof(scb->raw_mbox));
 706                         memset(pthru, 0, sizeof(mega_passthru));
 707
 708                         pthru->timeout = 0;
 709                         pthru->ars = 1;
 710                         pthru->reqsenselen = 14;
 711                         pthru->islogical = 1;
 712                         pthru->logdrv = ldrv_num;
 713                         pthru->cdblen = cmd->cmd_len;
 714                         memcpy(pthru->cdb, cmd->cmnd, cmd->cmd_len);
 715
 716                         if( adapter->has_64bit_addr ) {
 717                                 mbox->m_out.cmd = MEGA_MBOXCMD_PASSTHRU64;
 718                         }
 719                         else {
 720                                 mbox->m_out.cmd = MEGA_MBOXCMD_PASSTHRU;
 721                         }
 722
 723                         scb->dma_direction = PCI_DMA_FROMDEVICE;
 724
 725                         pthru->numsgelements = mega_build_sglist(adapter, scb,
 726                                 &pthru->dataxferaddr, &pthru->dataxferlen);
 727
 728                         mbox->m_out.xferaddr = scb->pthru_dma_addr;
 729
 730                         return scb;
 731
 732                 case READ_6:
 733                 case WRITE_6:
 734                 case READ_10:
 735                 case WRITE_10:
 736                 case READ_12:
 737                 case WRITE_12:
 738
 739                         /* Allocate a SCB and initialize mailbox */
 740                         if(!(scb = mega_allocate_scb(adapter, cmd))) {
 741                                 *busy = 1;
 742                                 return NULL;
 743                         }
 744                         mbox = (mbox_t *)scb->raw_mbox;
 745
 746                         memset(mbox, 0, sizeof(scb->raw_mbox));
 747                         mbox->m_out.logdrv = ldrv_num;
 748
 749                         /*
 750                          * A little hack: 2nd bit is zero for all scsi read
 751                          * commands and is set for all scsi write commands
 752                          */
 753                         if( adapter->has_64bit_addr ) {
 754                                 mbox->m_out.cmd = (*cmd->cmnd & 0x02) ?
 755                                         MEGA_MBOXCMD_LWRITE64:
 756                                         MEGA_MBOXCMD_LREAD64 ;
 757                         }
 758                         else {
 759                                 mbox->m_out.cmd = (*cmd->cmnd & 0x02) ?
 760                                         MEGA_MBOXCMD_LWRITE:
 761                                         MEGA_MBOXCMD_LREAD ;
 762                         }
 763
 764                         /*
 765                          * 6-byte READ(0x08) or WRITE(0x0A) cdb
 766                          */
 767                         if( cmd->cmd_len == 6 ) {
 768                                 mbox->m_out.numsectors = (u32) cmd->cmnd[4];
 769                                 mbox->m_out.lba =
 770                                         ((u32)cmd->cmnd[1] << 16) |
 771                                         ((u32)cmd->cmnd[2] << 8) |
 772                                         (u32)cmd->cmnd[3];
 773
 774                                 mbox->m_out.lba &= 0x1FFFFF;
 775
 776 #if MEGA_HAVE_STATS
 777                                 /*
 778                                  * Take modulo 0x80, since the logical drive
 779                                  * number increases by 0x80 when a logical
 780                                  * drive was deleted
 781                                  */
 782                                 if (*cmd->cmnd == READ_6) {
 783                                         adapter->nreads[ldrv_num%0x80]++;
 784                                         adapter->nreadblocks[ldrv_num%0x80] +=
 785                                                 mbox->m_out.numsectors;
 786                                 } else {
 787                                         adapter->nwrites[ldrv_num%0x80]++;
 788                                         adapter->nwriteblocks[ldrv_num%0x80] +=
 789                                                 mbox->m_out.numsectors;
 790                                 }
 791 #endif
 792                         }
 793
 794                         /*
 795                          * 10-byte READ(0x28) or WRITE(0x2A) cdb
 796                          */
 797                         if( cmd->cmd_len == 10 ) {
 798                                 mbox->m_out.numsectors =
 799                                         (u32)cmd->cmnd[8] |
 800                                         ((u32)cmd->cmnd[7] << 8);
 801                                 mbox->m_out.lba =
 802                                         ((u32)cmd->cmnd[2] << 24) |
 803                                         ((u32)cmd->cmnd[3] << 16) |
 804                                         ((u32)cmd->cmnd[4] << 8) |
 805                                         (u32)cmd->cmnd[5];
 806
 807 #if MEGA_HAVE_STATS
 808                                 if (*cmd->cmnd == READ_10) {
 809                                         adapter->nreads[ldrv_num%0x80]++;
 810                                         adapter->nreadblocks[ldrv_num%0x80] +=
 811                                                 mbox->m_out.numsectors;
 812                                 } else {
 813                                         adapter->nwrites[ldrv_num%0x80]++;
 814                                         adapter->nwriteblocks[ldrv_num%0x80] +=
 815                                                 mbox->m_out.numsectors;
 816                                 }
 817 #endif
 818                         }
 819
 820                         /*
 821                          * 12-byte READ(0xA8) or WRITE(0xAA) cdb
 822                          */
 823                         if( cmd->cmd_len == 12 ) {
 824                                 mbox->m_out.lba =
 825                                         ((u32)cmd->cmnd[2] << 24) |
 826                                         ((u32)cmd->cmnd[3] << 16) |
 827                                         ((u32)cmd->cmnd[4] << 8) |
 828                                         (u32)cmd->cmnd[5];
 829
 830                                 mbox->m_out.numsectors =
 831                                         ((u32)cmd->cmnd[6] << 24) |
 832                                         ((u32)cmd->cmnd[7] << 16) |
 833                                         ((u32)cmd->cmnd[8] << 8) |
 834                                         (u32)cmd->cmnd[9];
 835
 836 #if MEGA_HAVE_STATS
 837                                 if (*cmd->cmnd == READ_12) {
 838                                         adapter->nreads[ldrv_num%0x80]++;
 839                                         adapter->nreadblocks[ldrv_num%0x80] +=
 840                                                 mbox->m_out.numsectors;
 841                                 } else {
 842                                         adapter->nwrites[ldrv_num%0x80]++;
 843                                         adapter->nwriteblocks[ldrv_num%0x80] +=
 844                                                 mbox->m_out.numsectors;
 845                                 }
 846 #endif
 847                         }
 848
 849                         /*
 850                          * If it is a read command
 851                          */
 852                         if( (*cmd->cmnd & 0x0F) == 0x08 ) {
 853                                 scb->dma_direction = PCI_DMA_FROMDEVICE;
 854                         }
 855                         else {
 856                                 scb->dma_direction = PCI_DMA_TODEVICE;
 857                         }
 858
 859                         /* Calculate Scatter-Gather info */
 860                         mbox->m_out.numsgelements = mega_build_sglist(adapter, scb,
 861                                         (u32 *)&mbox->m_out.xferaddr, &seg);
 862
 863                         return scb;
 864
 865 #if MEGA_HAVE_CLUSTERING
 866                 case RESERVE:   /* Fall through */
 867                 case RELEASE:
 868
 869                         /*
 870                          * Do we support clustering and is the support enabled
 871                          */
 872                         if( ! adapter->has_cluster ) {
 873
 874                                 cmd->result = (DID_BAD_TARGET << 16);
 875                                 cmd->scsi_done(cmd);
 876                                 return NULL;
 877                         }
 878
 879                         /* Allocate a SCB and initialize mailbox */
 880                         if(!(scb = mega_allocate_scb(adapter, cmd))) {
 881                                 *busy = 1;
 882                                 return NULL;
 883                         }
 884
 885                         scb->raw_mbox[0] = MEGA_CLUSTER_CMD;
 886                         scb->raw_mbox[2] = ( *cmd->cmnd == RESERVE ) ?
 887                                 MEGA_RESERVE_LD : MEGA_RELEASE_LD;
 888
 889                         scb->raw_mbox[3] = ldrv_num;
 890
 891                         scb->dma_direction = PCI_DMA_NONE;
 892
 893                         return scb;
 894 #endif
 895
 896                 default:
 897                         cmd->result = (DID_BAD_TARGET << 16);
 898                         cmd->scsi_done(cmd);
 899                         return NULL;
 900                 }
 901         }
 902
 903         /*
 904          * Passthru drive commands
 905          */
 906         else {
 907                 /* Allocate a SCB and initialize passthru */
 908                 if(!(scb = mega_allocate_scb(adapter, cmd))) {
 909                         *busy = 1;
 910                         return NULL;
 911                 }
 912
 913                 mbox = (mbox_t *)scb->raw_mbox;
 914                 memset(mbox, 0, sizeof(scb->raw_mbox));
 915
 916                 if( adapter->support_ext_cdb ) {
 917
 918                         epthru = mega_prepare_extpassthru(adapter, scb, cmd,
 919                                         channel, target);
 920
 921                         mbox->m_out.cmd = MEGA_MBOXCMD_EXTPTHRU;
 922
 923                         mbox->m_out.xferaddr = scb->epthru_dma_addr;
 924
 925                 }
 926                 else {
 927
 928                         pthru = mega_prepare_passthru(adapter, scb, cmd,
 929                                         channel, target);
 930
 931                         /* Initialize mailbox */
 932                         if( adapter->has_64bit_addr ) {
 933                                 mbox->m_out.cmd = MEGA_MBOXCMD_PASSTHRU64;
 934                         }
 935                         else {
 936                                 mbox->m_out.cmd = MEGA_MBOXCMD_PASSTHRU;
 937                         }
 938
 939                         mbox->m_out.xferaddr = scb->pthru_dma_addr;
 940
 941                 }
 942                 return scb;
 943         }
 944         return NULL;
 945 }
 946
 947
 948 /**
 949  * mega_prepare_passthru()
 950  * @adapter - pointer to our soft state
 951  * @scb - our scsi control block
 952  * @cmd - scsi command from the mid-layer
 953  * @channel - actual channel on the controller
 954  * @target - actual id on the controller.
 955  *
 956  * prepare a command for the scsi physical devices.
 957  */
 958 static mega_passthru *
 959 mega_prepare_passthru(adapter_t *adapter, scb_t *scb, Scsi_Cmnd *cmd,
 960                 int channel, int target)
 961 {
 962         mega_passthru *pthru;
 963
 964         pthru = scb->pthru;
 965         memset(pthru, 0, sizeof (mega_passthru));
 966
 967         /* 0=6sec/1=60sec/2=10min/3=3hrs */
 968         pthru->timeout = 2;
 969
 970         pthru->ars = 1;
 971         pthru->reqsenselen = 14;
 972         pthru->islogical = 0;
 973
 974         pthru->channel = (adapter->flag & BOARD_40LD) ? 0 : channel;
 975
 976         pthru->target = (adapter->flag & BOARD_40LD) ?
 977                 (channel << 4) | target : target;
 978
 979         pthru->cdblen = cmd->cmd_len;
 980         pthru->logdrv = cmd->device->lun;
 981
 982         memcpy(pthru->cdb, cmd->cmnd, cmd->cmd_len);
 983
 984         /* Not sure about the direction */
 985         scb->dma_direction = PCI_DMA_BIDIRECTIONAL;
 986
 987         /* Special Code for Handling READ_CAPA/ INQ using bounce buffers */
 988         switch (cmd->cmnd[0]) {
 989         case INQUIRY:
 990         case READ_CAPACITY:
 991                 if(!(adapter->flag & (1L << cmd->device->channel))) {
 992
 993                         printk(KERN_NOTICE
 994                                 "scsi%d: scanning scsi channel %d [P%d] ",
 995                                         adapter->host->host_no,
 996                                         cmd->device->channel, channel);
 997                         printk("for physical devices.\n");
 998
 999                         adapter->flag |= (1L << cmd->device->channel);
1000                 }
1001                 /* Fall through */
1002         default:
1003                 pthru->numsgelements = mega_build_sglist(adapter, scb,
1004                                 &pthru->dataxferaddr, &pthru->dataxferlen);
1005                 break;
1006         }
1007         return pthru;
1008 }
1009
1010
1011 /**
1012  * mega_prepare_extpassthru()
1013  * @adapter - pointer to our soft state
1014  * @scb - our scsi control block
1015  * @cmd - scsi command from the mid-layer
1016  * @channel - actual channel on the controller
1017  * @target - actual id on the controller.
1018  *
1019  * prepare a command for the scsi physical devices. This rountine prepares
1020  * commands for devices which can take extended CDBs (>10 bytes)
1021  */
1022 static mega_ext_passthru *
1023 mega_prepare_extpassthru(adapter_t *adapter, scb_t *scb, Scsi_Cmnd *cmd,
1024                 int channel, int target)
1025 {
1026         mega_ext_passthru       *epthru;
1027
1028         epthru = scb->epthru;
1029         memset(epthru, 0, sizeof(mega_ext_passthru));
1030
1031         /* 0=6sec/1=60sec/2=10min/3=3hrs */
1032         epthru->timeout = 2;
1033
1034         epthru->ars = 1;
1035         epthru->reqsenselen = 14;
1036         epthru->islogical = 0;
1037
1038         epthru->channel = (adapter->flag & BOARD_40LD) ? 0 : channel;
1039         epthru->target = (adapter->flag & BOARD_40LD) ?
1040                 (channel << 4) | target : target;
1041
1042         epthru->cdblen = cmd->cmd_len;
1043         epthru->logdrv = cmd->device->lun;
1044
1045         memcpy(epthru->cdb, cmd->cmnd, cmd->cmd_len);
1046
1047         /* Not sure about the direction */
1048         scb->dma_direction = PCI_DMA_BIDIRECTIONAL;
1049
1050         switch(cmd->cmnd[0]) {
1051         case INQUIRY:
1052         case READ_CAPACITY:
1053                 if(!(adapter->flag & (1L << cmd->device->channel))) {
1054
1055                         printk(KERN_NOTICE
1056                                 "scsi%d: scanning scsi channel %d [P%d] ",
1057                                         adapter->host->host_no,
1058                                         cmd->device->channel, channel);
1059                         printk("for physical devices.\n");
1060
1061                         adapter->flag |= (1L << cmd->device->channel);
1062                 }
1063                 /* Fall through */
1064         default:
1065                 epthru->numsgelements = mega_build_sglist(adapter, scb,
1066                                 &epthru->dataxferaddr, &epthru->dataxferlen);
1067                 break;
1068         }
1069
1070         return epthru;
1071 }
1072
1073 static void
1074 __mega_runpendq(adapter_t *adapter)
1075 {
1076         scb_t *scb;
1077         struct list_head *pos, *next;
1078
1079         /* Issue any pending commands to the card */
1080         list_for_each_safe(pos, next, &adapter->pending_list) {
1081
1082                 scb = list_entry(pos, scb_t, list);
1083
1084                 if( !(scb->state & SCB_ISSUED) ) {
1085
1086                         if( issue_scb(adapter, scb) != 0 )
1087                                 return;
1088                 }
1089         }
1090
1091         return;
1092 }
1093
1094
1095 /**
1096  * issue_scb()
1097  * @adapter - pointer to our soft state
1098  * @scb - scsi control block
1099  *
1100  * Post a command to the card if the mailbox is available, otherwise return
1101  * busy. We also take the scb from the pending list if the mailbox is
1102  * available.
1103  */
1104 static int
1105 issue_scb(adapter_t *adapter, scb_t *scb)
1106 {
1107         volatile mbox64_t       *mbox64 = adapter->mbox64;
1108         volatile mbox_t         *mbox = adapter->mbox;
1109         unsigned int    i = 0;
1110
1111         if(unlikely(mbox->m_in.busy)) {
1112                 do {
1113                         udelay(1);
1114                         i++;
1115                 } while( mbox->m_in.busy && (i < max_mbox_busy_wait) );
1116
1117                 if(mbox->m_in.busy) return -1;
1118         }
1119
1120         /* Copy mailbox data into host structure */
1121         memcpy((char *)&mbox->m_out, (char *)scb->raw_mbox,
1122                         sizeof(struct mbox_out));
1123
1124         mbox->m_out.cmdid = scb->idx;   /* Set cmdid */
1125         mbox->m_in.busy = 1;            /* Set busy */
1126
1127
1128         /*
1129          * Increment the pending queue counter
1130          */
1131         atomic_inc(&adapter->pend_cmds);
1132
1133         switch (mbox->m_out.cmd) {
1134         case MEGA_MBOXCMD_LREAD64:
1135         case MEGA_MBOXCMD_LWRITE64:
1136         case MEGA_MBOXCMD_PASSTHRU64:
1137         case MEGA_MBOXCMD_EXTPTHRU:
1138                 mbox64->xfer_segment_lo = mbox->m_out.xferaddr;
1139                 mbox64->xfer_segment_hi = 0;
1140                 mbox->m_out.xferaddr = 0xFFFFFFFF;
1141                 break;
1142         default:
1143                 mbox64->xfer_segment_lo = 0;
1144                 mbox64->xfer_segment_hi = 0;
1145         }
1146
1147         /*
1148          * post the command
1149          */
1150         scb->state |= SCB_ISSUED;
1151
1152         if( likely(adapter->flag & BOARD_MEMMAP) ) {
1153                 mbox->m_in.poll = 0;
1154                 mbox->m_in.ack = 0;
1155                 WRINDOOR(adapter, adapter->mbox_dma | 0x1);
1156         }
1157         else {
1158                 irq_enable(adapter);
1159                 issue_command(adapter);
1160         }
1161
1162         return 0;
1163 }
1164
1165 /*
1166  * Wait until the controller's mailbox is available
1167  */
1168 static inline int
1169 mega_busywait_mbox (adapter_t *adapter)
1170 {
1171         if (adapter->mbox->m_in.busy)
1172                 return __mega_busywait_mbox(adapter);
1173         return 0;
1174 }
1175
1176 /**
1177  * issue_scb_block()
1178  * @adapter - pointer to our soft state
1179  * @raw_mbox - the mailbox
1180  *
1181  * Issue a scb in synchronous and non-interrupt mode
1182  */
1183 static int
1184 issue_scb_block(adapter_t *adapter, u_char *raw_mbox)
1185 {
1186         volatile mbox64_t *mbox64 = adapter->mbox64;
1187         volatile mbox_t *mbox = adapter->mbox;
1188         u8      byte;
1189
1190         /* Wait until mailbox is free */
1191         if(mega_busywait_mbox (adapter))
1192                 goto bug_blocked_mailbox;
1193
1194         /* Copy mailbox data into host structure */
1195         memcpy((char *) mbox, raw_mbox, sizeof(struct mbox_out));
1196         mbox->m_out.cmdid = 0xFE;
1197         mbox->m_in.busy = 1;
1198
1199         switch (raw_mbox[0]) {
1200         case MEGA_MBOXCMD_LREAD64:
1201         case MEGA_MBOXCMD_LWRITE64:
1202         case MEGA_MBOXCMD_PASSTHRU64:
1203         case MEGA_MBOXCMD_EXTPTHRU:
1204                 mbox64->xfer_segment_lo = mbox->m_out.xferaddr;
1205                 mbox64->xfer_segment_hi = 0;
1206                 mbox->m_out.xferaddr = 0xFFFFFFFF;
1207                 break;
1208         default:
1209                 mbox64->xfer_segment_lo = 0;
1210                 mbox64->xfer_segment_hi = 0;
1211         }
1212
1213         if( likely(adapter->flag & BOARD_MEMMAP) ) {
1214                 mbox->m_in.poll = 0;
1215                 mbox->m_in.ack = 0;
1216                 mbox->m_in.numstatus = 0xFF;
1217                 mbox->m_in.status = 0xFF;
1218                 WRINDOOR(adapter, adapter->mbox_dma | 0x1);
1219
1220                 while((volatile u8)mbox->m_in.numstatus == 0xFF)
1221                         cpu_relax();
1222
1223                 mbox->m_in.numstatus = 0xFF;
1224
1225                 while( (volatile u8)mbox->m_in.poll != 0x77 )
1226                         cpu_relax();
1227
1228                 mbox->m_in.poll = 0;
1229                 mbox->m_in.ack = 0x77;
1230
1231                 WRINDOOR(adapter, adapter->mbox_dma | 0x2);
1232
1233                 while(RDINDOOR(adapter) & 0x2)
1234                         cpu_relax();
1235         }
1236         else {
1237                 irq_disable(adapter);
1238                 issue_command(adapter);
1239
1240                 while (!((byte = irq_state(adapter)) & INTR_VALID))
1241                         cpu_relax();
1242
1243                 set_irq_state(adapter, byte);
1244                 irq_enable(adapter);
1245                 irq_ack(adapter);
1246         }
1247
1248         return mbox->m_in.status;
1249
1250 bug_blocked_mailbox:
1251         printk(KERN_WARNING "megaraid: Blocked mailbox......!!\n");
1252         udelay (1000);
1253         return -1;
1254 }
1255
1256
1257 /**
1258  * megaraid_isr_iomapped()
1259  * @irq - irq
1260  * @devp - pointer to our soft state
1261  *
1262  * Interrupt service routine for io-mapped controllers.
1263  * Find out if our device is interrupting. If yes, acknowledge the interrupt
1264  * and service the completed commands.
1265  */
1266 static irqreturn_t
1267 megaraid_isr_iomapped(int irq, void *devp)
1268 {
1269         adapter_t       *adapter = devp;
1270         unsigned long   flags;
1271         u8      status;
1272         u8      nstatus;
1273         u8      completed[MAX_FIRMWARE_STATUS];
1274         u8      byte;
1275         int     handled = 0;
1276
1277
1278         /*
1279          * loop till F/W has more commands for us to complete.
1280          */
1281         spin_lock_irqsave(&adapter->lock, flags);
1282
1283         do {
1284                 /* Check if a valid interrupt is pending */
1285                 byte = irq_state(adapter);
1286                 if( (byte & VALID_INTR_BYTE) == 0 ) {
1287                         /*
1288                          * No more pending commands
1289                          */
1290                         goto out_unlock;
1291                 }
1292                 set_irq_state(adapter, byte);
1293
1294                 while((nstatus = (volatile u8)adapter->mbox->m_in.numstatus)
1295                                 == 0xFF)
1296                         cpu_relax();
1297                 adapter->mbox->m_in.numstatus = 0xFF;
1298
1299                 status = adapter->mbox->m_in.status;
1300
1301                 /*
1302                  * decrement the pending queue counter
1303                  */
1304                 atomic_sub(nstatus, &adapter->pend_cmds);
1305
1306                 memcpy(completed, (void *)adapter->mbox->m_in.completed,
1307                                 nstatus);
1308
1309                 /* Acknowledge interrupt */
1310                 irq_ack(adapter);
1311
1312                 mega_cmd_done(adapter, completed, nstatus, status);
1313
1314                 mega_rundoneq(adapter);
1315
1316                 handled = 1;
1317
1318                 /* Loop through any pending requests */
1319                 if(atomic_read(&adapter->quiescent) == 0) {
1320                         mega_runpendq(adapter);
1321                 }
1322
1323         } while(1);
1324
1325  out_unlock:
1326
1327         spin_unlock_irqrestore(&adapter->lock, flags);
1328
1329         return IRQ_RETVAL(handled);
1330 }
1331
1332
1333 /**
1334  * megaraid_isr_memmapped()
1335  * @irq - irq
1336  * @devp - pointer to our soft state
1337  *
1338  * Interrupt service routine for memory-mapped controllers.
1339  * Find out if our device is interrupting. If yes, acknowledge the interrupt
1340  * and service the completed commands.
1341  */
1342 static irqreturn_t
1343 megaraid_isr_memmapped(int irq, void *devp)
1344 {
1345         adapter_t       *adapter = devp;
1346         unsigned long   flags;
1347         u8      status;
1348         u32     dword = 0;
1349         u8      nstatus;
1350         u8      completed[MAX_FIRMWARE_STATUS];
1351         int     handled = 0;
1352
1353
1354         /*
1355          * loop till F/W has more commands for us to complete.
1356          */
1357         spin_lock_irqsave(&adapter->lock, flags);
1358
1359         do {
1360                 /* Check if a valid interrupt is pending */
1361                 dword = RDOUTDOOR(adapter);
1362                 if(dword != 0x10001234) {
1363                         /*
1364                          * No more pending commands
1365                          */
1366                         goto out_unlock;
1367                 }
1368                 WROUTDOOR(adapter, 0x10001234);
1369
1370                 while((nstatus = (volatile u8)adapter->mbox->m_in.numstatus)
1371                                 == 0xFF) {
1372                         cpu_relax();
1373                 }
1374                 adapter->mbox->m_in.numstatus = 0xFF;
1375
1376                 status = adapter->mbox->m_in.status;
1377
1378                 /*
1379                  * decrement the pending queue counter
1380                  */
1381                 atomic_sub(nstatus, &adapter->pend_cmds);
1382
1383                 memcpy(completed, (void *)adapter->mbox->m_in.completed,
1384                                 nstatus);
1385
1386                 /* Acknowledge interrupt */
1387                 WRINDOOR(adapter, 0x2);
1388
1389                 handled = 1;
1390
1391                 while( RDINDOOR(adapter) & 0x02 )
1392                         cpu_relax();
1393
1394                 mega_cmd_done(adapter, completed, nstatus, status);
1395
1396                 mega_rundoneq(adapter);
1397
1398                 /* Loop through any pending requests */
1399                 if(atomic_read(&adapter->quiescent) == 0) {
1400                         mega_runpendq(adapter);
1401                 }
1402
1403         } while(1);
1404
1405  out_unlock:
1406
1407         spin_unlock_irqrestore(&adapter->lock, flags);
1408
1409         return IRQ_RETVAL(handled);
1410 }
1411 /**
1412  * mega_cmd_done()
1413  * @adapter - pointer to our soft state
1414  * @completed - array of ids of completed commands
1415  * @nstatus - number of completed commands
1416  * @status - status of the last command completed
1417  *
1418  * Complete the commands and call the scsi mid-layer callback hooks.
1419  */
1420 static void
1421 mega_cmd_done(adapter_t *adapter, u8 completed[], int nstatus, int status)
1422 {
1423         mega_ext_passthru       *epthru = NULL;
1424         struct scatterlist      *sgl;
1425         Scsi_Cmnd       *cmd = NULL;
1426         mega_passthru   *pthru = NULL;
1427         mbox_t  *mbox = NULL;
1428         u8      c;
1429         scb_t   *scb;
1430         int     islogical;
1431         int     cmdid;
1432         int     i;
1433
1434         /*
1435          * for all the commands completed, call the mid-layer callback routine
1436          * and free the scb.
1437          */
1438         for( i = 0; i < nstatus; i++ ) {
1439
1440                 cmdid = completed[i];
1441
1442                 if( cmdid == CMDID_INT_CMDS ) { /* internal command */
1443                         scb = &adapter->int_scb;
1444                         cmd = scb->cmd;
1445                         mbox = (mbox_t *)scb->raw_mbox;
1446
1447                         /*
1448                          * Internal command interface do not fire the extended
1449                          * passthru or 64-bit passthru
1450                          */
1451                         pthru = scb->pthru;
1452
1453                 }
1454                 else {
1455                         scb = &adapter->scb_list[cmdid];
1456
1457                         /*
1458                          * Make sure f/w has completed a valid command
1459                          */
1460                         if( !(scb->state & SCB_ISSUED) || scb->cmd == NULL ) {
1461                                 printk(KERN_CRIT
1462                                         "megaraid: invalid command ");
1463                                 printk("Id %d, scb->state:%x, scsi cmd:%p\n",
1464                                         cmdid, scb->state, scb->cmd);
1465
1466                                 continue;
1467                         }
1468
1469                         /*
1470                          * Was a abort issued for this command
1471                          */
1472                         if( scb->state & SCB_ABORT ) {
1473
1474                                 printk(KERN_WARNING
1475                                 "megaraid: aborted cmd [%x] complete.\n",
1476                                         scb->idx);
1477
1478                                 scb->cmd->result = (DID_ABORT << 16);
1479
1480                                 list_add_tail(SCSI_LIST(scb->cmd),
1481                                                 &adapter->completed_list);
1482
1483                                 mega_free_scb(adapter, scb);
1484
1485                                 continue;
1486                         }
1487
1488                         /*
1489                          * Was a reset issued for this command
1490                          */
1491                         if( scb->state & SCB_RESET ) {
1492
1493                                 printk(KERN_WARNING
1494                                 "megaraid: reset cmd [%x] complete.\n",
1495                                         scb->idx);
1496
1497                                 scb->cmd->result = (DID_RESET << 16);
1498
1499                                 list_add_tail(SCSI_LIST(scb->cmd),
1500                                                 &adapter->completed_list);
1501
1502                                 mega_free_scb (adapter, scb);
1503
1504                                 continue;
1505                         }
1506
1507                         cmd = scb->cmd;
1508                         pthru = scb->pthru;
1509                         epthru = scb->epthru;
1510                         mbox = (mbox_t *)scb->raw_mbox;
1511
1512 #if MEGA_HAVE_STATS
1513                         {
1514
1515                         int     logdrv = mbox->m_out.logdrv;
1516
1517                         islogical = adapter->logdrv_chan[cmd->channel];
1518                         /*
1519                          * Maintain an error counter for the logical drive.
1520                          * Some application like SNMP agent need such
1521                          * statistics
1522                          */
1523                         if( status && islogical && (cmd->cmnd[0] == READ_6 ||
1524                                                 cmd->cmnd[0] == READ_10 ||
1525                                                 cmd->cmnd[0] == READ_12)) {
1526                                 /*
1527                                  * Logical drive number increases by 0x80 when
1528                                  * a logical drive is deleted
1529                                  */
1530                                 adapter->rd_errors[logdrv%0x80]++;
1531                         }
1532
1533                         if( status && islogical && (cmd->cmnd[0] == WRITE_6 ||
1534                                                 cmd->cmnd[0] == WRITE_10 ||
1535                                                 cmd->cmnd[0] == WRITE_12)) {
1536                                 /*
1537                                  * Logical drive number increases by 0x80 when
1538                                  * a logical drive is deleted
1539                                  */
1540                                 adapter->wr_errors[logdrv%0x80]++;
1541                         }
1542
1543                         }
1544 #endif
1545                 }
1546
1547                 /*
1548                  * Do not return the presence of hard disk on the channel so,
1549                  * inquiry sent, and returned data==hard disk or removable
1550                  * hard disk and not logical, request should return failure! -
1551                  * PJ
1552                  */
1553                 islogical = adapter->logdrv_chan[cmd->device->channel];
1554                 if( cmd->cmnd[0] == INQUIRY && !islogical ) {
1555
1556                         sgl = scsi_sglist(cmd);
1557                         if( sg_page(sgl) ) {
1558                                 c = *(unsigned char *) sg_virt(&sgl[0]);
1559                         } else {
1560                                 printk(KERN_WARNING
1561                                        "megaraid: invalid sg.\n");
1562                                 c = 0;
1563                         }
1564
1565                         if(IS_RAID_CH(adapter, cmd->device->channel) &&
1566                                         ((c & 0x1F ) == TYPE_DISK)) {
1567                                 status = 0xF0;
1568                         }
1569                 }
1570
1571                 /* clear result; otherwise, success returns corrupt value */
1572                 cmd->result = 0;
1573
1574                 /* Convert MegaRAID status to Linux error code */
1575                 switch (status) {
1576                 case 0x00:      /* SUCCESS , i.e. SCSI_STATUS_GOOD */
1577                         cmd->result |= (DID_OK << 16);
1578                         break;
1579
1580                 case 0x02:      /* ERROR_ABORTED, i.e.
1581                                    SCSI_STATUS_CHECK_CONDITION */
1582
1583                         /* set sense_buffer and result fields */
1584                         if( mbox->m_out.cmd == MEGA_MBOXCMD_PASSTHRU ||
1585                                 mbox->m_out.cmd == MEGA_MBOXCMD_PASSTHRU64 ) {
1586
1587                                 memcpy(cmd->sense_buffer, pthru->reqsensearea,
1588                                                 14);
1589
1590                                 cmd->result = (DRIVER_SENSE << 24) |
1591                                         (DID_OK << 16) |
1592                                         (CHECK_CONDITION << 1);
1593                         }
1594                         else {
1595                                 if (mbox->m_out.cmd == MEGA_MBOXCMD_EXTPTHRU) {
1596
1597                                         memcpy(cmd->sense_buffer,
1598                                                 epthru->reqsensearea, 14);
1599
1600                                         cmd->result = (DRIVER_SENSE << 24) |
1601                                                 (DID_OK << 16) |
1602                                                 (CHECK_CONDITION << 1);
1603                                 } else {
1604                                         cmd->sense_buffer[0] = 0x70;
1605                                         cmd->sense_buffer[2] = ABORTED_COMMAND;
1606                                         cmd->result |= (CHECK_CONDITION << 1);
1607                                 }
1608                         }
1609                         break;
1610
1611                 case 0x08:      /* ERR_DEST_DRIVE_FAILED, i.e.
1612                                    SCSI_STATUS_BUSY */
1613                         cmd->result |= (DID_BUS_BUSY << 16) | status;
1614                         break;
1615
1616                 default:
1617 #if MEGA_HAVE_CLUSTERING
1618                         /*
1619                          * If TEST_UNIT_READY fails, we know
1620                          * MEGA_RESERVATION_STATUS failed
1621                          */
1622                         if( cmd->cmnd[0] == TEST_UNIT_READY ) {
1623                                 cmd->result |= (DID_ERROR << 16) |
1624                                         (RESERVATION_CONFLICT << 1);
1625                         }
1626                         else
1627                         /*
1628                          * Error code returned is 1 if Reserve or Release
1629                          * failed or the input parameter is invalid
1630                          */
1631                         if( status == 1 &&
1632                                 (cmd->cmnd[0] == RESERVE ||
1633                                          cmd->cmnd[0] == RELEASE) ) {
1634
1635                                 cmd->result |= (DID_ERROR << 16) |
1636                                         (RESERVATION_CONFLICT << 1);
1637                         }
1638                         else
1639 #endif
1640                                 cmd->result |= (DID_BAD_TARGET << 16)|status;
1641                 }
1642
1643                 /*
1644                  * Only free SCBs for the commands coming down from the
1645                  * mid-layer, not for which were issued internally
1646                  *
1647                  * For internal command, restore the status returned by the
1648                  * firmware so that user can interpret it.
1649                  */
1650                 if( cmdid == CMDID_INT_CMDS ) { /* internal command */
1651                         cmd->result = status;
1652
1653                         /*
1654                          * Remove the internal command from the pending list
1655                          */
1656                         list_del_init(&scb->list);
1657                         scb->state = SCB_FREE;
1658                 }
1659                 else {
1660                         mega_free_scb(adapter, scb);
1661                 }
1662
1663                 /* Add Scsi_Command to end of completed queue */
1664                 list_add_tail(SCSI_LIST(cmd), &adapter->completed_list);
1665         }
1666 }
1667
1668
1669 /*
1670  * mega_runpendq()
1671  *
1672  * Run through the list of completed requests and finish it
1673  */
1674 static void
1675 mega_rundoneq (adapter_t *adapter)
1676 {
1677         Scsi_Cmnd *cmd;
1678         struct list_head *pos;
1679
1680         list_for_each(pos, &adapter->completed_list) {
1681
1682                 struct scsi_pointer* spos = (struct scsi_pointer *)pos;
1683
1684                 cmd = list_entry(spos, Scsi_Cmnd, SCp);
1685                 cmd->scsi_done(cmd);
1686         }
1687
1688         INIT_LIST_HEAD(&adapter->completed_list);
1689 }
1690
1691
1692 /*
1693  * Free a SCB structure
1694  * Note: We assume the scsi commands associated with this scb is not free yet.
1695  */
1696 static void
1697 mega_free_scb(adapter_t *adapter, scb_t *scb)
1698 {
1699         switch( scb->dma_type ) {
1700
1701         case MEGA_DMA_TYPE_NONE:
1702                 break;
1703
1704         case MEGA_SGLIST:
1705                 scsi_dma_unmap(scb->cmd);
1706                 break;
1707         default:
1708                 break;
1709         }
1710
1711         /*
1712          * Remove from the pending list
1713          */
1714         list_del_init(&scb->list);
1715
1716         /* Link the scb back into free list */
1717         scb->state = SCB_FREE;
1718         scb->cmd = NULL;
1719
1720         list_add(&scb->list, &adapter->free_list);
1721 }
1722
1723
1724 static int
1725 __mega_busywait_mbox (adapter_t *adapter)
1726 {
1727         volatile mbox_t *mbox = adapter->mbox;
1728         long counter;
1729
1730         for (counter = 0; counter < 10000; counter++) {
1731                 if (!mbox->m_in.busy)
1732                         return 0;
1733                 udelay(100);
1734                 cond_resched();
1735         }
1736         return -1;              /* give up after 1 second */
1737 }
1738
1739 /*
1740  * Copies data to SGLIST
1741  * Note: For 64 bit cards, we need a minimum of one SG element for read/write
1742  */
1743 static int
1744 mega_build_sglist(adapter_t *adapter, scb_t *scb, u32 *buf, u32 *len)
1745 {
1746         struct scatterlist *sg;
1747         Scsi_Cmnd       *cmd;
1748         int     sgcnt;
1749         int     idx;
1750
1751         cmd = scb->cmd;
1752
1753         /*
1754          * Copy Scatter-Gather list info into controller structure.
1755          *
1756          * The number of sg elements returned must not exceed our limit
1757          */
1758         sgcnt = scsi_dma_map(cmd);
1759
1760         scb->dma_type = MEGA_SGLIST;
1761
1762         BUG_ON(sgcnt > adapter->sglen || sgcnt < 0);
1763
1764         *len = 0;
1765
1766         if (scsi_sg_count(cmd) == 1 && !adapter->has_64bit_addr) {
1767                 sg = scsi_sglist(cmd);
1768                 scb->dma_h_bulkdata = sg_dma_address(sg);
1769                 *buf = (u32)scb->dma_h_bulkdata;
1770                 *len = sg_dma_len(sg);
1771                 return 0;
1772         }
1773
1774         scsi_for_each_sg(cmd, sg, sgcnt, idx) {
1775                 if (adapter->has_64bit_addr) {
1776                         scb->sgl64[idx].address = sg_dma_address(sg);
1777                         *len += scb->sgl64[idx].length = sg_dma_len(sg);
1778                 } else {
1779                         scb->sgl[idx].address = sg_dma_address(sg);
1780                         *len += scb->sgl[idx].length = sg_dma_len(sg);
1781                 }
1782         }
1783
1784         /* Reset pointer and length fields */
1785         *buf = scb->sgl_dma_addr;
1786
1787         /* Return count of SG requests */
1788         return sgcnt;
1789 }
1790
1791
1792 /*
1793  * mega_8_to_40ld()
1794  *
1795  * takes all info in AdapterInquiry structure and puts it into ProductInfo and
1796  * Enquiry3 structures for later use
1797  */
1798 static void
1799 mega_8_to_40ld(mraid_inquiry *inquiry, mega_inquiry3 *enquiry3,
1800                 mega_product_info *product_info)
1801 {
1802         int i;
1803
1804         product_info->max_commands = inquiry->adapter_info.max_commands;
1805         enquiry3->rebuild_rate = inquiry->adapter_info.rebuild_rate;
1806         product_info->nchannels = inquiry->adapter_info.nchannels;
1807
1808         for (i = 0; i < 4; i++) {
1809                 product_info->fw_version[i] =
1810                         inquiry->adapter_info.fw_version[i];
1811
1812                 product_info->bios_version[i] =
1813                         inquiry->adapter_info.bios_version[i];
1814         }
1815         enquiry3->cache_flush_interval =
1816                 inquiry->adapter_info.cache_flush_interval;
1817
1818         product_info->dram_size = inquiry->adapter_info.dram_size;
1819
1820         enquiry3->num_ldrv = inquiry->logdrv_info.num_ldrv;
1821
1822         for (i = 0; i < MAX_LOGICAL_DRIVES_8LD; i++) {
1823                 enquiry3->ldrv_size[i] = inquiry->logdrv_info.ldrv_size[i];
1824                 enquiry3->ldrv_prop[i] = inquiry->logdrv_info.ldrv_prop[i];
1825                 enquiry3->ldrv_state[i] = inquiry->logdrv_info.ldrv_state[i];
1826         }
1827
1828         for (i = 0; i < (MAX_PHYSICAL_DRIVES); i++)
1829                 enquiry3->pdrv_state[i] = inquiry->pdrv_info.pdrv_state[i];
1830 }
1831
1832 static inline void
1833 mega_free_sgl(adapter_t *adapter)
1834 {
1835         scb_t   *scb;
1836         int     i;
1837
1838         for(i = 0; i < adapter->max_cmds; i++) {
1839
1840                 scb = &adapter->scb_list[i];
1841
1842                 if( scb->sgl64 ) {
1843                         pci_free_consistent(adapter->dev,
1844                                 sizeof(mega_sgl64) * adapter->sglen,
1845                                 scb->sgl64,
1846                                 scb->sgl_dma_addr);
1847
1848                         scb->sgl64 = NULL;
1849                 }
1850
1851                 if( scb->pthru ) {
1852                         pci_free_consistent(adapter->dev, sizeof(mega_passthru),
1853                                 scb->pthru, scb->pthru_dma_addr);
1854
1855                         scb->pthru = NULL;
1856                 }
1857
1858                 if( scb->epthru ) {
1859                         pci_free_consistent(adapter->dev,
1860                                 sizeof(mega_ext_passthru),
1861                                 scb->epthru, scb->epthru_dma_addr);
1862
1863                         scb->epthru = NULL;
1864                 }
1865
1866         }
1867 }
1868
1869
1870 /*
1871  * Get information about the card/driver
1872  */
1873 const char *
1874 megaraid_info(struct Scsi_Host *host)
1875 {
1876         static char buffer[512];
1877         adapter_t *adapter;
1878
1879         adapter = (adapter_t *)host->hostdata;
1880
1881         sprintf (buffer,
1882                  "LSI Logic MegaRAID %s %d commands %d targs %d chans %d luns",
1883                  adapter->fw_version, adapter->product_info.max_commands,
1884                  adapter->host->max_id, adapter->host->max_channel,
1885                  adapter->host->max_lun);
1886         return buffer;
1887 }
1888
1889 /*
1890  * Abort a previous SCSI request. Only commands on the pending list can be
1891  * aborted. All the commands issued to the F/W must complete.
1892  */
1893 static int
1894 megaraid_abort(Scsi_Cmnd *cmd)
1895 {
1896         adapter_t       *adapter;
1897         int             rval;
1898
1899         adapter = (adapter_t *)cmd->device->host->hostdata;
1900
1901         rval =  megaraid_abort_and_reset(adapter, cmd, SCB_ABORT);
1902
1903         /*
1904          * This is required here to complete any completed requests
1905          * to be communicated over to the mid layer.
1906          */
1907         mega_rundoneq(adapter);
1908
1909         return rval;
1910 }
1911
1912
1913 static int
1914 megaraid_reset(struct scsi_cmnd *cmd)
1915 {
1916         adapter_t       *adapter;
1917         megacmd_t       mc;
1918         int             rval;
1919
1920         adapter = (adapter_t *)cmd->device->host->hostdata;
1921
1922 #if MEGA_HAVE_CLUSTERING
1923         mc.cmd = MEGA_CLUSTER_CMD;
1924         mc.opcode = MEGA_RESET_RESERVATIONS;
1925
1926         if( mega_internal_command(adapter, &mc, NULL) != 0 ) {
1927                 printk(KERN_WARNING
1928                                 "megaraid: reservation reset failed.\n");
1929         }
1930         else {
1931                 printk(KERN_INFO "megaraid: reservation reset.\n");
1932         }
1933 #endif
1934
1935         spin_lock_irq(&adapter->lock);
1936
1937         rval =  megaraid_abort_and_reset(adapter, cmd, SCB_RESET);
1938
1939         /*
1940          * This is required here to complete any completed requests
1941          * to be communicated over to the mid layer.
1942          */
1943         mega_rundoneq(adapter);
1944         spin_unlock_irq(&adapter->lock);
1945
1946         return rval;
1947 }
1948
1949 /**
1950  * megaraid_abort_and_reset()
1951  * @adapter - megaraid soft state
1952  * @cmd - scsi command to be aborted or reset
1953  * @aor - abort or reset flag
1954  *
1955  * Try to locate the scsi command in the pending queue. If found and is not
1956  * issued to the controller, abort/reset it. Otherwise return failure
1957  */
1958 static int
1959 megaraid_abort_and_reset(adapter_t *adapter, Scsi_Cmnd *cmd, int aor)
1960 {
1961         struct list_head        *pos, *next;
1962         scb_t                   *scb;
1963
1964         printk(KERN_WARNING "megaraid: %s cmd=%x <c=%d t=%d l=%d>\n",
1965              (aor == SCB_ABORT)? "ABORTING":"RESET",
1966              cmd->cmnd[0], cmd->device->channel,
1967              cmd->device->id, cmd->device->lun);
1968
1969         if(list_empty(&adapter->pending_list))
1970                 return FALSE;
1971
1972         list_for_each_safe(pos, next, &adapter->pending_list) {
1973
1974                 scb = list_entry(pos, scb_t, list);
1975
1976                 if (scb->cmd == cmd) { /* Found command */
1977
1978                         scb->state |= aor;
1979
1980                         /*
1981                          * Check if this command has firmware ownership. If
1982                          * yes, we cannot reset this command. Whenever f/w
1983                          * completes this command, we will return appropriate
1984                          * status from ISR.
1985                          */
1986                         if( scb->state & SCB_ISSUED ) {
1987
1988                                 printk(KERN_WARNING
1989                                         "megaraid: %s[%x], fw owner.\n",
1990                                         (aor==SCB_ABORT) ? "ABORTING":"RESET",
1991                                         scb->idx);
1992
1993                                 return FALSE;
1994                         }
1995                         else {
1996
1997                                 /*
1998                                  * Not yet issued! Remove from the pending
1999                                  * list
2000                                  */
2001                                 printk(KERN_WARNING
2002                                         "megaraid: %s-[%x], driver owner.\n",
2003                                         (aor==SCB_ABORT) ? "ABORTING":"RESET",
2004                                         scb->idx);
2005
2006                                 mega_free_scb(adapter, scb);
2007
2008                                 if( aor == SCB_ABORT ) {
2009                                         cmd->result = (DID_ABORT << 16);
2010                                 }
2011                                 else {
2012                                         cmd->result = (DID_RESET << 16);
2013                                 }
2014
2015                                 list_add_tail(SCSI_LIST(cmd),
2016                                                 &adapter->completed_list);
2017
2018                                 return TRUE;
2019                         }
2020                 }
2021         }
2022
2023         return FALSE;
2024 }
2025
2026 static inline int
2027 make_local_pdev(adapter_t *adapter, struct pci_dev **pdev)
2028 {
2029         *pdev = pci_alloc_dev(NULL);
2030
2031         if( *pdev == NULL ) return -1;
2032
2033         memcpy(*pdev, adapter->dev, sizeof(struct pci_dev));
2034
2035         if( pci_set_dma_mask(*pdev, DMA_BIT_MASK(32)) != 0 ) {
2036                 kfree(*pdev);
2037                 return -1;
2038         }
2039
2040         return 0;
2041 }
2042
2043 static inline void
2044 free_local_pdev(struct pci_dev *pdev)
2045 {
2046         kfree(pdev);
2047 }
2048
2049 /**
2050  * mega_allocate_inquiry()
2051  * @dma_handle - handle returned for dma address
2052  * @pdev - handle to pci device
2053  *
2054  * allocates memory for inquiry structure
2055  */
2056 static inline void *
2057 mega_allocate_inquiry(dma_addr_t *dma_handle, struct pci_dev *pdev)
2058 {
2059         return pci_alloc_consistent(pdev, sizeof(mega_inquiry3), dma_handle);
2060 }
2061
2062
2063 static inline void
2064 mega_free_inquiry(void *inquiry, dma_addr_t dma_handle, struct pci_dev *pdev)
2065 {
2066         pci_free_consistent(pdev, sizeof(mega_inquiry3), inquiry, dma_handle);
2067 }
2068
2069
2070 #ifdef CONFIG_PROC_FS
2071 /* Following code handles /proc fs  */
2072
2073 /**
2074  * proc_show_config()
2075  * @m - Synthetic file construction data
2076  * @v - File iterator
2077  *
2078  * Display configuration information about the controller.
2079  */
2080 static int
2081 proc_show_config(struct seq_file *m, void *v)
2082 {
2083
2084         adapter_t *adapter = m->private;
2085
2086         seq_puts(m, MEGARAID_VERSION);
2087         if(adapter->product_info.product_name[0])
2088                 seq_printf(m, "%s\n", adapter->product_info.product_name);
2089
2090         seq_puts(m, "Controller Type: ");
2091
2092         if( adapter->flag & BOARD_MEMMAP )
2093                 seq_puts(m, "438/466/467/471/493/518/520/531/532\n");
2094         else
2095                 seq_puts(m, "418/428/434\n");
2096
2097         if(adapter->flag & BOARD_40LD)
2098                 seq_puts(m, "Controller Supports 40 Logical Drives\n");
2099
2100         if(adapter->flag & BOARD_64BIT)
2101                 seq_puts(m, "Controller capable of 64-bit memory addressing\n");
2102         if( adapter->has_64bit_addr )
2103                 seq_puts(m, "Controller using 64-bit memory addressing\n");
2104         else
2105                 seq_puts(m, "Controller is not using 64-bit memory addressing\n");
2106
2107         seq_printf(m, "Base = %08lx, Irq = %d, ",
2108                    adapter->base, adapter->host->irq);
2109
2110         seq_printf(m, "Logical Drives = %d, Channels = %d\n",
2111                    adapter->numldrv, adapter->product_info.nchannels);
2112
2113         seq_printf(m, "Version =%s:%s, DRAM = %dMb\n",
2114                    adapter->fw_version, adapter->bios_version,
2115                    adapter->product_info.dram_size);
2116
2117         seq_printf(m, "Controller Queue Depth = %d, Driver Queue Depth = %d\n",
2118                    adapter->product_info.max_commands, adapter->max_cmds);
2119
2120         seq_printf(m, "support_ext_cdb    = %d\n", adapter->support_ext_cdb);
2121         seq_printf(m, "support_random_del = %d\n", adapter->support_random_del);
2122         seq_printf(m, "boot_ldrv_enabled  = %d\n", adapter->boot_ldrv_enabled);
2123         seq_printf(m, "boot_ldrv          = %d\n", adapter->boot_ldrv);
2124         seq_printf(m, "boot_pdrv_enabled  = %d\n", adapter->boot_pdrv_enabled);
2125         seq_printf(m, "boot_pdrv_ch       = %d\n", adapter->boot_pdrv_ch);
2126         seq_printf(m, "boot_pdrv_tgt      = %d\n", adapter->boot_pdrv_tgt);
2127         seq_printf(m, "quiescent          = %d\n",
2128                    atomic_read(&adapter->quiescent));
2129         seq_printf(m, "has_cluster        = %d\n", adapter->has_cluster);
2130
2131         seq_puts(m, "\nModule Parameters:\n");
2132         seq_printf(m, "max_cmd_per_lun    = %d\n", max_cmd_per_lun);
2133         seq_printf(m, "max_sectors_per_io = %d\n", max_sectors_per_io);
2134         return 0;
2135 }
2136
2137 /**
2138  * proc_show_stat()
2139  * @m - Synthetic file construction data
2140  * @v - File iterator
2141  *
2142  * Display statistical information about the I/O activity.
2143  */
2144 static int
2145 proc_show_stat(struct seq_file *m, void *v)
2146 {
2147         adapter_t *adapter = m->private;
2148 #if MEGA_HAVE_STATS
2149         int     i;
2150 #endif
2151
2152         seq_puts(m, "Statistical Information for this controller\n");
2153         seq_printf(m, "pend_cmds = %d\n", atomic_read(&adapter->pend_cmds));
2154 #if MEGA_HAVE_STATS
2155         for(i = 0; i < adapter->numldrv; i++) {
2156                 seq_printf(m, "Logical Drive %d:\n", i);
2157                 seq_printf(m, "\tReads Issued = %lu, Writes Issued = %lu\n",
2158                            adapter->nreads[i], adapter->nwrites[i]);
2159                 seq_printf(m, "\tSectors Read = %lu, Sectors Written = %lu\n",
2160                            adapter->nreadblocks[i], adapter->nwriteblocks[i]);
2161                 seq_printf(m, "\tRead errors = %lu, Write errors = %lu\n\n",
2162                            adapter->rd_errors[i], adapter->wr_errors[i]);
2163         }
2164 #else
2165         seq_puts(m, "IO and error counters not compiled in driver.\n");
2166 #endif
2167         return 0;
2168 }
2169
2170
2171 /**
2172  * proc_show_mbox()
2173  * @m - Synthetic file construction data
2174  * @v - File iterator
2175  *
2176  * Display mailbox information for the last command issued. This information
2177  * is good for debugging.
2178  */
2179 static int
2180 proc_show_mbox(struct seq_file *m, void *v)
2181 {
2182         adapter_t       *adapter = m->private;
2183         volatile mbox_t *mbox = adapter->mbox;
2184
2185         seq_puts(m, "Contents of Mail Box Structure\n");
2186         seq_printf(m, "  Fw Command   = 0x%02x\n", mbox->m_out.cmd);
2187         seq_printf(m, "  Cmd Sequence = 0x%02x\n", mbox->m_out.cmdid);
2188         seq_printf(m, "  No of Sectors= %04d\n", mbox->m_out.numsectors);
2189         seq_printf(m, "  LBA          = 0x%02x\n", mbox->m_out.lba);
2190         seq_printf(m, "  DTA          = 0x%08x\n", mbox->m_out.xferaddr);
2191         seq_printf(m, "  Logical Drive= 0x%02x\n", mbox->m_out.logdrv);
2192         seq_printf(m, "  No of SG Elmt= 0x%02x\n", mbox->m_out.numsgelements);
2193         seq_printf(m, "  Busy         = %01x\n", mbox->m_in.busy);
2194         seq_printf(m, "  Status       = 0x%02x\n", mbox->m_in.status);
2195         return 0;
2196 }
2197
2198
2199 /**
2200  * proc_show_rebuild_rate()
2201  * @m - Synthetic file construction data
2202  * @v - File iterator
2203  *
2204  * Display current rebuild rate
2205  */
2206 static int
2207 proc_show_rebuild_rate(struct seq_file *m, void *v)
2208 {
2209         adapter_t       *adapter = m->private;
2210         dma_addr_t      dma_handle;
2211         caddr_t         inquiry;
2212         struct pci_dev  *pdev;
2213
2214         if( make_local_pdev(adapter, &pdev) != 0 )
2215                 return 0;
2216
2217         if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL )
2218                 goto free_pdev;
2219
2220         if( mega_adapinq(adapter, dma_handle) != 0 ) {
2221                 seq_puts(m, "Adapter inquiry failed.\n");
2222                 printk(KERN_WARNING "megaraid: inquiry failed.\n");
2223                 goto free_inquiry;
2224         }
2225
2226         if( adapter->flag & BOARD_40LD )
2227                 seq_printf(m, "Rebuild Rate: [%d%%]\n",
2228                            ((mega_inquiry3 *)inquiry)->rebuild_rate);
2229         else
2230                 seq_printf(m, "Rebuild Rate: [%d%%]\n",
2231                         ((mraid_ext_inquiry *)
2232                          inquiry)->raid_inq.adapter_info.rebuild_rate);
2233
2234 free_inquiry:
2235         mega_free_inquiry(inquiry, dma_handle, pdev);
2236 free_pdev:
2237         free_local_pdev(pdev);
2238         return 0;
2239 }
2240
2241
2242 /**
2243  * proc_show_battery()
2244  * @m - Synthetic file construction data
2245  * @v - File iterator
2246  *
2247  * Display information about the battery module on the controller.
2248  */
2249 static int
2250 proc_show_battery(struct seq_file *m, void *v)
2251 {
2252         adapter_t       *adapter = m->private;
2253         dma_addr_t      dma_handle;
2254         caddr_t         inquiry;
2255         struct pci_dev  *pdev;
2256         u8      battery_status;
2257
2258         if( make_local_pdev(adapter, &pdev) != 0 )
2259                 return 0;
2260
2261         if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL )
2262                 goto free_pdev;
2263
2264         if( mega_adapinq(adapter, dma_handle) != 0 ) {
2265                 seq_printf(m, "Adapter inquiry failed.\n");
2266                 printk(KERN_WARNING "megaraid: inquiry failed.\n");
2267                 goto free_inquiry;
2268         }
2269
2270         if( adapter->flag & BOARD_40LD ) {
2271                 battery_status = ((mega_inquiry3 *)inquiry)->battery_status;
2272         }
2273         else {
2274                 battery_status = ((mraid_ext_inquiry *)inquiry)->
2275                         raid_inq.adapter_info.battery_status;
2276         }
2277
2278         /*
2279          * Decode the battery status
2280          */
2281         seq_printf(m, "Battery Status:[%d]", battery_status);
2282
2283         if(battery_status == MEGA_BATT_CHARGE_DONE)
2284                 seq_puts(m, " Charge Done");
2285
2286         if(battery_status & MEGA_BATT_MODULE_MISSING)
2287                 seq_puts(m, " Module Missing");
2288
2289         if(battery_status & MEGA_BATT_LOW_VOLTAGE)
2290                 seq_puts(m, " Low Voltage");
2291
2292         if(battery_status & MEGA_BATT_TEMP_HIGH)
2293                 seq_puts(m, " Temperature High");
2294
2295         if(battery_status & MEGA_BATT_PACK_MISSING)
2296                 seq_puts(m, " Pack Missing");
2297
2298         if(battery_status & MEGA_BATT_CHARGE_INPROG)
2299                 seq_puts(m, " Charge In-progress");
2300
2301         if(battery_status & MEGA_BATT_CHARGE_FAIL)
2302                 seq_puts(m, " Charge Fail");
2303
2304         if(battery_status & MEGA_BATT_CYCLES_EXCEEDED)
2305                 seq_puts(m, " Cycles Exceeded");
2306
2307         seq_putc(m, '\n');
2308
2309 free_inquiry:
2310         mega_free_inquiry(inquiry, dma_handle, pdev);
2311 free_pdev:
2312         free_local_pdev(pdev);
2313         return 0;
2314 }
2315
2316
2317 /*
2318  * Display scsi inquiry
2319  */
2320 static void
2321 mega_print_inquiry(struct seq_file *m, char *scsi_inq)
2322 {
2323         int     i;
2324
2325         seq_puts(m, "  Vendor: ");
2326         seq_write(m, scsi_inq + 8, 8);
2327         seq_puts(m, "  Model: ");
2328         seq_write(m, scsi_inq + 16, 16);
2329         seq_puts(m, "  Rev: ");
2330         seq_write(m, scsi_inq + 32, 4);
2331         seq_putc(m, '\n');
2332
2333         i = scsi_inq[0] & 0x1f;
2334         seq_printf(m, "  Type:   %s ", scsi_device_type(i));
2335
2336         seq_printf(m, "                 ANSI SCSI revision: %02x",
2337                    scsi_inq[2] & 0x07);
2338
2339         if( (scsi_inq[2] & 0x07) == 1 && (scsi_inq[3] & 0x0f) == 1 )
2340                 seq_puts(m, " CCS\n");
2341         else
2342                 seq_putc(m, '\n');
2343 }
2344
2345 /**
2346  * proc_show_pdrv()
2347  * @m - Synthetic file construction data
2348  * @page - buffer to write the data in
2349  * @adapter - pointer to our soft state
2350  *
2351  * Display information about the physical drives.
2352  */
2353 static int
2354 proc_show_pdrv(struct seq_file *m, adapter_t *adapter, int channel)
2355 {
2356         dma_addr_t      dma_handle;
2357         char            *scsi_inq;
2358         dma_addr_t      scsi_inq_dma_handle;
2359         caddr_t         inquiry;
2360         struct pci_dev  *pdev;
2361         u8      *pdrv_state;
2362         u8      state;
2363         int     tgt;
2364         int     max_channels;
2365         int     i;
2366
2367         if( make_local_pdev(adapter, &pdev) != 0 )
2368                 return 0;
2369
2370         if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL )
2371                 goto free_pdev;
2372
2373         if( mega_adapinq(adapter, dma_handle) != 0 ) {
2374                 seq_puts(m, "Adapter inquiry failed.\n");
2375                 printk(KERN_WARNING "megaraid: inquiry failed.\n");
2376                 goto free_inquiry;
2377         }
2378
2379
2380         scsi_inq = pci_alloc_consistent(pdev, 256, &scsi_inq_dma_handle);
2381         if( scsi_inq == NULL ) {
2382                 seq_puts(m, "memory not available for scsi inq.\n");
2383                 goto free_inquiry;
2384         }
2385
2386         if( adapter->flag & BOARD_40LD ) {
2387                 pdrv_state = ((mega_inquiry3 *)inquiry)->pdrv_state;
2388         }
2389         else {
2390                 pdrv_state = ((mraid_ext_inquiry *)inquiry)->
2391                         raid_inq.pdrv_info.pdrv_state;
2392         }
2393
2394         max_channels = adapter->product_info.nchannels;
2395
2396         if( channel >= max_channels ) {
2397                 goto free_pci;
2398         }
2399
2400         for( tgt = 0; tgt <= MAX_TARGET; tgt++ ) {
2401
2402                 i = channel*16 + tgt;
2403
2404                 state = *(pdrv_state + i);
2405                 switch( state & 0x0F ) {
2406                 case PDRV_ONLINE:
2407                         seq_printf(m, "Channel:%2d Id:%2d State: Online",
2408                                    channel, tgt);
2409                         break;
2410
2411                 case PDRV_FAILED:
2412                         seq_printf(m, "Channel:%2d Id:%2d State: Failed",
2413                                    channel, tgt);
2414                         break;
2415
2416                 case PDRV_RBLD:
2417                         seq_printf(m, "Channel:%2d Id:%2d State: Rebuild",
2418                                    channel, tgt);
2419                         break;
2420
2421                 case PDRV_HOTSPARE:
2422                         seq_printf(m, "Channel:%2d Id:%2d State: Hot spare",
2423                                    channel, tgt);
2424                         break;
2425
2426                 default:
2427                         seq_printf(m, "Channel:%2d Id:%2d State: Un-configured",
2428                                    channel, tgt);
2429                         break;
2430                 }
2431
2432                 /*
2433                  * This interface displays inquiries for disk drives
2434                  * only. Inquries for logical drives and non-disk
2435                  * devices are available through /proc/scsi/scsi
2436                  */
2437                 memset(scsi_inq, 0, 256);
2438                 if( mega_internal_dev_inquiry(adapter, channel, tgt,
2439                                 scsi_inq_dma_handle) ||
2440                                 (scsi_inq[0] & 0x1F) != TYPE_DISK ) {
2441                         continue;
2442                 }
2443
2444                 /*
2445                  * Check for overflow. We print less than 240
2446                  * characters for inquiry
2447                  */
2448                 seq_puts(m, ".\n");
2449                 mega_print_inquiry(m, scsi_inq);
2450         }
2451
2452 free_pci:
2453         pci_free_consistent(pdev, 256, scsi_inq, scsi_inq_dma_handle);
2454 free_inquiry:
2455         mega_free_inquiry(inquiry, dma_handle, pdev);
2456 free_pdev:
2457         free_local_pdev(pdev);
2458         return 0;
2459 }
2460
2461 /**
2462  * proc_show_pdrv_ch0()
2463  * @m - Synthetic file construction data
2464  * @v - File iterator
2465  *
2466  * Display information about the physical drives on physical channel 0.
2467  */
2468 static int
2469 proc_show_pdrv_ch0(struct seq_file *m, void *v)
2470 {
2471         return proc_show_pdrv(m, m->private, 0);
2472 }
2473
2474
2475 /**
2476  * proc_show_pdrv_ch1()
2477  * @m - Synthetic file construction data
2478  * @v - File iterator
2479  *
2480  * Display information about the physical drives on physical channel 1.
2481  */
2482 static int
2483 proc_show_pdrv_ch1(struct seq_file *m, void *v)
2484 {
2485         return proc_show_pdrv(m, m->private, 1);
2486 }
2487
2488
2489 /**
2490  * proc_show_pdrv_ch2()
2491  * @m - Synthetic file construction data
2492  * @v - File iterator
2493  *
2494  * Display information about the physical drives on physical channel 2.
2495  */
2496 static int
2497 proc_show_pdrv_ch2(struct seq_file *m, void *v)
2498 {
2499         return proc_show_pdrv(m, m->private, 2);
2500 }
2501
2502
2503 /**
2504  * proc_show_pdrv_ch3()
2505  * @m - Synthetic file construction data
2506  * @v - File iterator
2507  *
2508  * Display information about the physical drives on physical channel 3.
2509  */
2510 static int
2511 proc_show_pdrv_ch3(struct seq_file *m, void *v)
2512 {
2513         return proc_show_pdrv(m, m->private, 3);
2514 }
2515
2516
2517 /**
2518  * proc_show_rdrv()
2519  * @m - Synthetic file construction data
2520  * @adapter - pointer to our soft state
2521  * @start - starting logical drive to display
2522  * @end - ending logical drive to display
2523  *
2524  * We do not print the inquiry information since its already available through
2525  * /proc/scsi/scsi interface
2526  */
2527 static int
2528 proc_show_rdrv(struct seq_file *m, adapter_t *adapter, int start, int end )
2529 {
2530         dma_addr_t      dma_handle;
2531         logdrv_param    *lparam;
2532         megacmd_t       mc;
2533         char            *disk_array;
2534         dma_addr_t      disk_array_dma_handle;
2535         caddr_t         inquiry;
2536         struct pci_dev  *pdev;
2537         u8      *rdrv_state;
2538         int     num_ldrv;
2539         u32     array_sz;
2540         int     i;
2541
2542         if( make_local_pdev(adapter, &pdev) != 0 )
2543                 return 0;
2544
2545         if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL )
2546                 goto free_pdev;
2547
2548         if( mega_adapinq(adapter, dma_handle) != 0 ) {
2549                 seq_puts(m, "Adapter inquiry failed.\n");
2550                 printk(KERN_WARNING "megaraid: inquiry failed.\n");
2551                 goto free_inquiry;
2552         }
2553
2554         memset(&mc, 0, sizeof(megacmd_t));
2555
2556         if( adapter->flag & BOARD_40LD ) {
2557                 array_sz = sizeof(disk_array_40ld);
2558
2559                 rdrv_state = ((mega_inquiry3 *)inquiry)->ldrv_state;
2560
2561                 num_ldrv = ((mega_inquiry3 *)inquiry)->num_ldrv;
2562         }
2563         else {
2564                 array_sz = sizeof(disk_array_8ld);
2565
2566                 rdrv_state = ((mraid_ext_inquiry *)inquiry)->
2567                         raid_inq.logdrv_info.ldrv_state;
2568
2569                 num_ldrv = ((mraid_ext_inquiry *)inquiry)->
2570                         raid_inq.logdrv_info.num_ldrv;
2571         }
2572
2573         disk_array = pci_alloc_consistent(pdev, array_sz,
2574                         &disk_array_dma_handle);
2575
2576         if( disk_array == NULL ) {
2577                 seq_puts(m, "memory not available.\n");
2578                 goto free_inquiry;
2579         }
2580
2581         mc.xferaddr = (u32)disk_array_dma_handle;
2582
2583         if( adapter->flag & BOARD_40LD ) {
2584                 mc.cmd = FC_NEW_CONFIG;
2585                 mc.opcode = OP_DCMD_READ_CONFIG;
2586
2587                 if( mega_internal_command(adapter, &mc, NULL) ) {
2588                         seq_puts(m, "40LD read config failed.\n");
2589                         goto free_pci;
2590                 }
2591
2592         }
2593         else {
2594                 mc.cmd = NEW_READ_CONFIG_8LD;
2595
2596                 if( mega_internal_command(adapter, &mc, NULL) ) {
2597                         mc.cmd = READ_CONFIG_8LD;
2598                         if( mega_internal_command(adapter, &mc, NULL) ) {
2599                                 seq_puts(m, "8LD read config failed.\n");
2600                                 goto free_pci;
2601                         }
2602                 }
2603         }
2604
2605         for( i = start; i < ( (end+1 < num_ldrv) ? end+1 : num_ldrv ); i++ ) {
2606
2607                 if( adapter->flag & BOARD_40LD ) {
2608                         lparam =
2609                         &((disk_array_40ld *)disk_array)->ldrv[i].lparam;
2610                 }
2611                 else {
2612                         lparam =
2613                         &((disk_array_8ld *)disk_array)->ldrv[i].lparam;
2614                 }
2615
2616                 /*
2617                  * Check for overflow. We print less than 240 characters for
2618                  * information about each logical drive.
2619                  */
2620                 seq_printf(m, "Logical drive:%2d:, ", i);
2621
2622                 switch( rdrv_state[i] & 0x0F ) {
2623                 case RDRV_OFFLINE:
2624                         seq_puts(m, "state: offline");
2625                         break;
2626                 case RDRV_DEGRADED:
2627                         seq_puts(m, "state: degraded");
2628                         break;
2629                 case RDRV_OPTIMAL:
2630                         seq_puts(m, "state: optimal");
2631                         break;
2632                 case RDRV_DELETED:
2633                         seq_puts(m, "state: deleted");
2634                         break;
2635                 default:
2636                         seq_puts(m, "state: unknown");
2637                         break;
2638                 }
2639
2640                 /*
2641                  * Check if check consistency or initialization is going on
2642                  * for this logical drive.
2643                  */
2644                 if( (rdrv_state[i] & 0xF0) == 0x20 )
2645                         seq_puts(m, ", check-consistency in progress");
2646                 else if( (rdrv_state[i] & 0xF0) == 0x10 )
2647                         seq_puts(m, ", initialization in progress");
2648
2649                 seq_putc(m, '\n');
2650
2651                 seq_printf(m, "Span depth:%3d, ", lparam->span_depth);
2652                 seq_printf(m, "RAID level:%3d, ", lparam->level);
2653                 seq_printf(m, "Stripe size:%3d, ",
2654                            lparam->stripe_sz ? lparam->stripe_sz/2: 128);
2655                 seq_printf(m, "Row size:%3d\n", lparam->row_size);
2656
2657                 seq_puts(m, "Read Policy: ");
2658                 switch(lparam->read_ahead) {
2659                 case NO_READ_AHEAD:
2660                         seq_puts(m, "No read ahead, ");
2661                         break;
2662                 case READ_AHEAD:
2663                         seq_puts(m, "Read ahead, ");
2664                         break;
2665                 case ADAP_READ_AHEAD:
2666                         seq_puts(m, "Adaptive, ");
2667                         break;
2668
2669                 }
2670
2671                 seq_puts(m, "Write Policy: ");
2672                 switch(lparam->write_mode) {
2673                 case WRMODE_WRITE_THRU:
2674                         seq_puts(m, "Write thru, ");
2675                         break;
2676                 case WRMODE_WRITE_BACK:
2677                         seq_puts(m, "Write back, ");
2678                         break;
2679                 }
2680
2681                 seq_puts(m, "Cache Policy: ");
2682                 switch(lparam->direct_io) {
2683                 case CACHED_IO:
2684                         seq_puts(m, "Cached IO\n\n");
2685                         break;
2686                 case DIRECT_IO:
2687                         seq_puts(m, "Direct IO\n\n");
2688                         break;
2689                 }
2690         }
2691
2692 free_pci:
2693         pci_free_consistent(pdev, array_sz, disk_array,
2694                         disk_array_dma_handle);
2695 free_inquiry:
2696         mega_free_inquiry(inquiry, dma_handle, pdev);
2697 free_pdev:
2698         free_local_pdev(pdev);
2699         return 0;
2700 }
2701
2702 /**
2703  * proc_show_rdrv_10()
2704  * @m - Synthetic file construction data
2705  * @v - File iterator
2706  *
2707  * Display real time information about the logical drives 0 through 9.
2708  */
2709 static int
2710 proc_show_rdrv_10(struct seq_file *m, void *v)
2711 {
2712         return proc_show_rdrv(m, m->private, 0, 9);
2713 }
2714
2715
2716 /**
2717  * proc_show_rdrv_20()
2718  * @m - Synthetic file construction data
2719  * @v - File iterator
2720  *
2721  * Display real time information about the logical drives 0 through 9.
2722  */
2723 static int
2724 proc_show_rdrv_20(struct seq_file *m, void *v)
2725 {
2726         return proc_show_rdrv(m, m->private, 10, 19);
2727 }
2728
2729
2730 /**
2731  * proc_show_rdrv_30()
2732  * @m - Synthetic file construction data
2733  * @v - File iterator
2734  *
2735  * Display real time information about the logical drives 0 through 9.
2736  */
2737 static int
2738 proc_show_rdrv_30(struct seq_file *m, void *v)
2739 {
2740         return proc_show_rdrv(m, m->private, 20, 29);
2741 }
2742
2743
2744 /**
2745  * proc_show_rdrv_40()
2746  * @m - Synthetic file construction data
2747  * @v - File iterator
2748  *
2749  * Display real time information about the logical drives 0 through 9.
2750  */
2751 static int
2752 proc_show_rdrv_40(struct seq_file *m, void *v)
2753 {
2754         return proc_show_rdrv(m, m->private, 30, 39);
2755 }
2756
2757
2758 /*
2759  * seq_file wrappers for procfile show routines.
2760  */
2761 static int mega_proc_open(struct inode *inode, struct file *file)
2762 {
2763         adapter_t *adapter = proc_get_parent_data(inode);
2764         int (*show)(struct seq_file *, void *) = PDE_DATA(inode);
2765
2766         return single_open(file, show, adapter);
2767 }
2768
2769 static const struct file_operations mega_proc_fops = {
2770         .open           = mega_proc_open,
2771         .read           = seq_read,
2772         .llseek         = seq_lseek,
2773         .release        = single_release,
2774 };
2775
2776 /*
2777  * Table of proc files we need to create.
2778  */
2779 struct mega_proc_file {
2780         const char *name;
2781         unsigned short ptr_offset;
2782         int (*show) (struct seq_file *m, void *v);
2783 };
2784
2785 static const struct mega_proc_file mega_proc_files[] = {
2786         { "config",           offsetof(adapter_t, proc_read), proc_show_config },
2787         { "stat",             offsetof(adapter_t, proc_stat), proc_show_stat },
2788         { "mailbox",          offsetof(adapter_t, proc_mbox), proc_show_mbox },
2789 #if MEGA_HAVE_ENH_PROC
2790         { "rebuild-rate",     offsetof(adapter_t, proc_rr), proc_show_rebuild_rate },
2791         { "battery-status",   offsetof(adapter_t, proc_battery), proc_show_battery },
2792         { "diskdrives-ch0",   offsetof(adapter_t, proc_pdrvstat[0]), proc_show_pdrv_ch0 },
2793         { "diskdrives-ch1",   offsetof(adapter_t, proc_pdrvstat[1]), proc_show_pdrv_ch1 },
2794         { "diskdrives-ch2",   offsetof(adapter_t, proc_pdrvstat[2]), proc_show_pdrv_ch2 },
2795         { "diskdrives-ch3",   offsetof(adapter_t, proc_pdrvstat[3]), proc_show_pdrv_ch3 },
2796         { "raiddrives-0-9",   offsetof(adapter_t, proc_rdrvstat[0]), proc_show_rdrv_10 },
2797         { "raiddrives-10-19", offsetof(adapter_t, proc_rdrvstat[1]), proc_show_rdrv_20 },
2798         { "raiddrives-20-29", offsetof(adapter_t, proc_rdrvstat[2]), proc_show_rdrv_30 },
2799         { "raiddrives-30-39", offsetof(adapter_t, proc_rdrvstat[3]), proc_show_rdrv_40 },
2800 #endif
2801         { NULL }
2802 };
2803
2804 /**
2805  * mega_create_proc_entry()
2806  * @index - index in soft state array
2807  * @parent - parent node for this /proc entry
2808  *
2809  * Creates /proc entries for our controllers.
2810  */
2811 static void
2812 mega_create_proc_entry(int index, struct proc_dir_entry *parent)
2813 {
2814         const struct mega_proc_file *f;
2815         adapter_t       *adapter = hba_soft_state[index];
2816         struct proc_dir_entry   *dir, *de, **ppde;
2817         u8              string[16];
2818
2819         sprintf(string, "hba%d", adapter->host->host_no);
2820
2821         dir = adapter->controller_proc_dir_entry =
2822                 proc_mkdir_data(string, 0, parent, adapter);
2823         if(!dir) {
2824                 printk(KERN_WARNING "\nmegaraid: proc_mkdir failed\n");
2825                 return;
2826         }
2827
2828         for (f = mega_proc_files; f->name; f++) {
2829                 de = proc_create_data(f->name, S_IRUSR, dir, &mega_proc_fops,
2830                                       f->show);
2831                 if (!de) {
2832                         printk(KERN_WARNING "\nmegaraid: proc_create failed\n");
2833                         return;
2834                 }
2835
2836                 ppde = (void *)adapter + f->ptr_offset;
2837                 *ppde = de;
2838         }
2839 }
2840
2841 #else
2842 static inline void mega_create_proc_entry(int index, struct proc_dir_entry *parent)
2843 {
2844 }
2845 #endif
2846
2847
2848 /**
2849  * megaraid_biosparam()
2850  *
2851  * Return the disk geometry for a particular disk
2852  */
2853 static int
2854 megaraid_biosparam(struct scsi_device *sdev, struct block_device *bdev,
2855                     sector_t capacity, int geom[])
2856 {
2857         adapter_t       *adapter;
2858         unsigned char   *bh;
2859         int     heads;
2860         int     sectors;
2861         int     cylinders;
2862         int     rval;
2863
2864         /* Get pointer to host config structure */
2865         adapter = (adapter_t *)sdev->host->hostdata;
2866
2867         if (IS_RAID_CH(adapter, sdev->channel)) {
2868                         /* Default heads (64) & sectors (32) */
2869                         heads = 64;
2870                         sectors = 32;
2871                         cylinders = (ulong)capacity / (heads * sectors);
2872
2873                         /*
2874                          * Handle extended translation size for logical drives
2875                          * > 1Gb
2876                          */
2877                         if ((ulong)capacity >= 0x200000) {
2878                                 heads = 255;
2879                                 sectors = 63;
2880                                 cylinders = (ulong)capacity / (heads * sectors);
2881                         }
2882
2883                         /* return result */
2884                         geom[0] = heads;
2885                         geom[1] = sectors;
2886                         geom[2] = cylinders;
2887         }
2888         else {
2889                 bh = scsi_bios_ptable(bdev);
2890
2891                 if( bh ) {
2892                         rval = scsi_partsize(bh, capacity,
2893                                             &geom[2], &geom[0], &geom[1]);
2894                         kfree(bh);
2895                         if( rval != -1 )
2896                                 return rval;
2897                 }
2898
2899                 printk(KERN_INFO
2900                 "megaraid: invalid partition on this disk on channel %d\n",
2901                                 sdev->channel);
2902
2903                 /* Default heads (64) & sectors (32) */
2904                 heads = 64;
2905                 sectors = 32;
2906                 cylinders = (ulong)capacity / (heads * sectors);
2907
2908                 /* Handle extended translation size for logical drives > 1Gb */
2909                 if ((ulong)capacity >= 0x200000) {
2910                         heads = 255;
2911                         sectors = 63;
2912                         cylinders = (ulong)capacity / (heads * sectors);
2913                 }
2914
2915                 /* return result */
2916                 geom[0] = heads;
2917                 geom[1] = sectors;
2918                 geom[2] = cylinders;
2919         }
2920
2921         return 0;
2922 }
2923
2924 /**
2925  * mega_init_scb()
2926  * @adapter - pointer to our soft state
2927  *
2928  * Allocate memory for the various pointers in the scb structures:
2929  * scatter-gather list pointer, passthru and extended passthru structure
2930  * pointers.
2931  */
2932 static int
2933 mega_init_scb(adapter_t *adapter)
2934 {
2935         scb_t   *scb;
2936         int     i;
2937
2938         for( i = 0; i < adapter->max_cmds; i++ ) {
2939
2940                 scb = &adapter->scb_list[i];
2941
2942                 scb->sgl64 = NULL;
2943                 scb->sgl = NULL;
2944                 scb->pthru = NULL;
2945                 scb->epthru = NULL;
2946         }
2947
2948         for( i = 0; i < adapter->max_cmds; i++ ) {
2949
2950                 scb = &adapter->scb_list[i];
2951
2952                 scb->idx = i;
2953
2954                 scb->sgl64 = pci_alloc_consistent(adapter->dev,
2955                                 sizeof(mega_sgl64) * adapter->sglen,
2956                                 &scb->sgl_dma_addr);
2957
2958                 scb->sgl = (mega_sglist *)scb->sgl64;
2959
2960                 if( !scb->sgl ) {
2961                         printk(KERN_WARNING "RAID: Can't allocate sglist.\n");
2962                         mega_free_sgl(adapter);
2963                         return -1;
2964                 }
2965
2966                 scb->pthru = pci_alloc_consistent(adapter->dev,
2967                                 sizeof(mega_passthru),
2968                                 &scb->pthru_dma_addr);
2969
2970                 if( !scb->pthru ) {
2971                         printk(KERN_WARNING "RAID: Can't allocate passthru.\n");
2972                         mega_free_sgl(adapter);
2973                         return -1;
2974                 }
2975
2976                 scb->epthru = pci_alloc_consistent(adapter->dev,
2977                                 sizeof(mega_ext_passthru),
2978                                 &scb->epthru_dma_addr);
2979
2980                 if( !scb->epthru ) {
2981                         printk(KERN_WARNING
2982                                 "Can't allocate extended passthru.\n");
2983                         mega_free_sgl(adapter);
2984                         return -1;
2985                 }
2986
2987
2988                 scb->dma_type = MEGA_DMA_TYPE_NONE;
2989
2990                 /*
2991                  * Link to free list
2992                  * lock not required since we are loading the driver, so no
2993                  * commands possible right now.
2994                  */
2995                 scb->state = SCB_FREE;
2996                 scb->cmd = NULL;
2997                 list_add(&scb->list, &adapter->free_list);
2998         }
2999
3000         return 0;
3001 }
3002
3003
3004 /**
3005  * megadev_open()
3006  * @inode - unused
3007  * @filep - unused
3008  *
3009  * Routines for the character/ioctl interface to the driver. Find out if this
3010  * is a valid open.
3011  */
3012 static int
3013 megadev_open (struct inode *inode, struct file *filep)
3014 {
3015         /*
3016          * Only allow superuser to access private ioctl interface
3017          */
3018         if( !capable(CAP_SYS_ADMIN) ) return -EACCES;
3019
3020         return 0;
3021 }
3022
3023
3024 /**
3025  * megadev_ioctl()
3026  * @inode - Our device inode
3027  * @filep - unused
3028  * @cmd - ioctl command
3029  * @arg - user buffer
3030  *
3031  * ioctl entry point for our private ioctl interface. We move the data in from
3032  * the user space, prepare the command (if necessary, convert the old MIMD
3033  * ioctl to new ioctl command), and issue a synchronous command to the
3034  * controller.
3035  */
3036 static int
3037 megadev_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
3038 {
3039         adapter_t       *adapter;
3040         nitioctl_t      uioc;
3041         int             adapno;
3042         int             rval;
3043         mega_passthru   __user *upthru; /* user address for passthru */
3044         mega_passthru   *pthru;         /* copy user passthru here */
3045         dma_addr_t      pthru_dma_hndl;
3046         void            *data = NULL;   /* data to be transferred */
3047         dma_addr_t      data_dma_hndl;  /* dma handle for data xfer area */
3048         megacmd_t       mc;
3049         megastat_t      __user *ustats;
3050         int             num_ldrv;
3051         u32             uxferaddr = 0;
3052         struct pci_dev  *pdev;
3053
3054         ustats = NULL; /* avoid compilation warnings */
3055         num_ldrv = 0;
3056
3057         /*
3058          * Make sure only USCSICMD are issued through this interface.
3059          * MIMD application would still fire different command.
3060          */
3061         if( (_IOC_TYPE(cmd) != MEGAIOC_MAGIC) && (cmd != USCSICMD) ) {
3062                 return -EINVAL;
3063         }
3064
3065         /*
3066          * Check and convert a possible MIMD command to NIT command.
3067          * mega_m_to_n() copies the data from the user space, so we do not
3068          * have to do it here.
3069          * NOTE: We will need some user address to copyout the data, therefore
3070          * the inteface layer will also provide us with the required user
3071          * addresses.
3072          */
3073         memset(&uioc, 0, sizeof(nitioctl_t));
3074         if( (rval = mega_m_to_n( (void __user *)arg, &uioc)) != 0 )
3075                 return rval;
3076
3077
3078         switch( uioc.opcode ) {
3079
3080         case GET_DRIVER_VER:
3081                 if( put_user(driver_ver, (u32 __user *)uioc.uioc_uaddr) )
3082                         return (-EFAULT);
3083
3084                 break;
3085
3086         case GET_N_ADAP:
3087                 if( put_user(hba_count, (u32 __user *)uioc.uioc_uaddr) )
3088                         return (-EFAULT);
3089
3090                 /*
3091                  * Shucks. MIMD interface returns a positive value for number
3092                  * of adapters. TODO: Change it to return 0 when there is no
3093                  * applicatio using mimd interface.
3094                  */
3095                 return hba_count;
3096
3097         case GET_ADAP_INFO:
3098
3099                 /*
3100                  * Which adapter
3101                  */
3102                 if( (adapno = GETADAP(uioc.adapno)) >= hba_count )
3103                         return (-ENODEV);
3104
3105                 if( copy_to_user(uioc.uioc_uaddr, mcontroller+adapno,
3106                                 sizeof(struct mcontroller)) )
3107                         return (-EFAULT);
3108                 break;
3109
3110 #if MEGA_HAVE_STATS
3111
3112         case GET_STATS:
3113                 /*
3114                  * Which adapter
3115                  */
3116                 if( (adapno = GETADAP(uioc.adapno)) >= hba_count )
3117                         return (-ENODEV);
3118
3119                 adapter = hba_soft_state[adapno];
3120
3121                 ustats = uioc.uioc_uaddr;
3122
3123                 if( copy_from_user(&num_ldrv, &ustats->num_ldrv, sizeof(int)) )
3124                         return (-EFAULT);
3125
3126                 /*
3127                  * Check for the validity of the logical drive number
3128                  */
3129                 if( num_ldrv >= MAX_LOGICAL_DRIVES_40LD ) return -EINVAL;
3130
3131                 if( copy_to_user(ustats->nreads, adapter->nreads,
3132                                         num_ldrv*sizeof(u32)) )
3133                         return -EFAULT;
3134
3135                 if( copy_to_user(ustats->nreadblocks, adapter->nreadblocks,
3136                                         num_ldrv*sizeof(u32)) )
3137                         return -EFAULT;
3138
3139                 if( copy_to_user(ustats->nwrites, adapter->nwrites,
3140                                         num_ldrv*sizeof(u32)) )
3141                         return -EFAULT;
3142
3143                 if( copy_to_user(ustats->nwriteblocks, adapter->nwriteblocks,
3144                                         num_ldrv*sizeof(u32)) )
3145                         return -EFAULT;
3146
3147                 if( copy_to_user(ustats->rd_errors, adapter->rd_errors,
3148                                         num_ldrv*sizeof(u32)) )
3149                         return -EFAULT;
3150
3151                 if( copy_to_user(ustats->wr_errors, adapter->wr_errors,
3152                                         num_ldrv*sizeof(u32)) )
3153                         return -EFAULT;
3154
3155                 return 0;
3156
3157 #endif
3158         case MBOX_CMD:
3159
3160                 /*
3161                  * Which adapter
3162                  */
3163                 if( (adapno = GETADAP(uioc.adapno)) >= hba_count )
3164                         return (-ENODEV);
3165
3166                 adapter = hba_soft_state[adapno];
3167
3168                 /*
3169                  * Deletion of logical drive is a special case. The adapter
3170                  * should be quiescent before this command is issued.
3171                  */
3172                 if( uioc.uioc_rmbox[0] == FC_DEL_LOGDRV &&
3173                                 uioc.uioc_rmbox[2] == OP_DEL_LOGDRV ) {
3174
3175                         /*
3176                          * Do we support this feature
3177                          */
3178                         if( !adapter->support_random_del ) {
3179                                 printk(KERN_WARNING "megaraid: logdrv ");
3180                                 printk("delete on non-supporting F/W.\n");
3181
3182                                 return (-EINVAL);
3183                         }
3184
3185                         rval = mega_del_logdrv( adapter, uioc.uioc_rmbox[3] );
3186
3187                         if( rval == 0 ) {
3188                                 memset(&mc, 0, sizeof(megacmd_t));
3189
3190                                 mc.status = rval;
3191
3192                                 rval = mega_n_to_m((void __user *)arg, &mc);
3193                         }
3194
3195                         return rval;
3196                 }
3197                 /*
3198                  * This interface only support the regular passthru commands.
3199                  * Reject extended passthru and 64-bit passthru
3200                  */
3201                 if( uioc.uioc_rmbox[0] == MEGA_MBOXCMD_PASSTHRU64 ||
3202                         uioc.uioc_rmbox[0] == MEGA_MBOXCMD_EXTPTHRU ) {
3203
3204                         printk(KERN_WARNING "megaraid: rejected passthru.\n");
3205
3206                         return (-EINVAL);
3207                 }
3208
3209                 /*
3210                  * For all internal commands, the buffer must be allocated in
3211                  * <4GB address range
3212                  */
3213                 if( make_local_pdev(adapter, &pdev) != 0 )
3214                         return -EIO;
3215
3216                 /* Is it a passthru command or a DCMD */
3217                 if( uioc.uioc_rmbox[0] == MEGA_MBOXCMD_PASSTHRU ) {
3218                         /* Passthru commands */
3219
3220                         pthru = pci_alloc_consistent(pdev,
3221                                         sizeof(mega_passthru),
3222                                         &pthru_dma_hndl);
3223
3224                         if( pthru == NULL ) {
3225                                 free_local_pdev(pdev);
3226                                 return (-ENOMEM);
3227                         }
3228
3229                         /*
3230                          * The user passthru structure
3231                          */
3232                         upthru = (mega_passthru __user *)(unsigned long)MBOX(uioc)->xferaddr;
3233
3234                         /*
3235                          * Copy in the user passthru here.
3236                          */
3237                         if( copy_from_user(pthru, upthru,
3238                                                 sizeof(mega_passthru)) ) {
3239
3240                                 pci_free_consistent(pdev,
3241                                                 sizeof(mega_passthru), pthru,
3242                                                 pthru_dma_hndl);
3243
3244                                 free_local_pdev(pdev);
3245
3246                                 return (-EFAULT);
3247                         }
3248
3249                         /*
3250                          * Is there a data transfer
3251                          */
3252                         if( pthru->dataxferlen ) {
3253                                 data = pci_alloc_consistent(pdev,
3254                                                 pthru->dataxferlen,
3255                                                 &data_dma_hndl);
3256
3257                                 if( data == NULL ) {
3258                                         pci_free_consistent(pdev,
3259                                                         sizeof(mega_passthru),
3260                                                         pthru,
3261                                                         pthru_dma_hndl);
3262
3263                                         free_local_pdev(pdev);
3264
3265                                         return (-ENOMEM);
3266                                 }
3267
3268                                 /*
3269                                  * Save the user address and point the kernel
3270                                  * address at just allocated memory
3271                                  */
3272                                 uxferaddr = pthru->dataxferaddr;
3273                                 pthru->dataxferaddr = data_dma_hndl;
3274                         }
3275
3276
3277                         /*
3278                          * Is data coming down-stream
3279                          */
3280                         if( pthru->dataxferlen && (uioc.flags & UIOC_WR) ) {
3281                                 /*
3282                                  * Get the user data
3283                                  */
3284                                 if( copy_from_user(data, (char __user *)(unsigned long) uxferaddr,
3285                                                         pthru->dataxferlen) ) {
3286                                         rval = (-EFAULT);
3287                                         goto freemem_and_return;
3288                                 }
3289                         }
3290
3291                         memset(&mc, 0, sizeof(megacmd_t));
3292
3293                         mc.cmd = MEGA_MBOXCMD_PASSTHRU;
3294                         mc.xferaddr = (u32)pthru_dma_hndl;
3295
3296                         /*
3297                          * Issue the command
3298                          */
3299                         mega_internal_command(adapter, &mc, pthru);
3300
3301                         rval = mega_n_to_m((void __user *)arg, &mc);
3302
3303                         if( rval ) goto freemem_and_return;
3304
3305
3306                         /*
3307                          * Is data going up-stream
3308                          */
3309                         if( pthru->dataxferlen && (uioc.flags & UIOC_RD) ) {
3310                                 if( copy_to_user((char __user *)(unsigned long) uxferaddr, data,
3311                                                         pthru->dataxferlen) ) {
3312                                         rval = (-EFAULT);
3313                                 }
3314                         }
3315
3316                         /*
3317                          * Send the request sense data also, irrespective of
3318                          * whether the user has asked for it or not.
3319                          */
3320                         if (copy_to_user(upthru->reqsensearea,
3321                                         pthru->reqsensearea, 14))
3322                                 rval = -EFAULT;
3323
3324 freemem_and_return:
3325                         if( pthru->dataxferlen ) {
3326                                 pci_free_consistent(pdev,
3327                                                 pthru->dataxferlen, data,
3328                                                 data_dma_hndl);
3329                         }
3330
3331                         pci_free_consistent(pdev, sizeof(mega_passthru),
3332                                         pthru, pthru_dma_hndl);
3333
3334                         free_local_pdev(pdev);
3335
3336                         return rval;
3337                 }
3338                 else {
3339                         /* DCMD commands */
3340
3341                         /*
3342                          * Is there a data transfer
3343                          */
3344                         if( uioc.xferlen ) {
3345                                 data = pci_alloc_consistent(pdev,
3346                                                 uioc.xferlen, &data_dma_hndl);
3347
3348                                 if( data == NULL ) {
3349                                         free_local_pdev(pdev);
3350                                         return (-ENOMEM);
3351                                 }
3352
3353                                 uxferaddr = MBOX(uioc)->xferaddr;
3354                         }
3355
3356                         /*
3357                          * Is data coming down-stream
3358                          */
3359                         if( uioc.xferlen && (uioc.flags & UIOC_WR) ) {
3360                                 /*
3361                                  * Get the user data
3362                                  */
3363                                 if( copy_from_user(data, (char __user *)(unsigned long) uxferaddr,
3364                                                         uioc.xferlen) ) {
3365
3366                                         pci_free_consistent(pdev,
3367                                                         uioc.xferlen,
3368                                                         data, data_dma_hndl);
3369
3370                                         free_local_pdev(pdev);
3371
3372                                         return (-EFAULT);
3373                                 }
3374                         }
3375
3376                         memcpy(&mc, MBOX(uioc), sizeof(megacmd_t));
3377
3378                         mc.xferaddr = (u32)data_dma_hndl;
3379
3380                         /*
3381                          * Issue the command
3382                          */
3383                         mega_internal_command(adapter, &mc, NULL);
3384
3385                         rval = mega_n_to_m((void __user *)arg, &mc);
3386
3387                         if( rval ) {
3388                                 if( uioc.xferlen ) {
3389                                         pci_free_consistent(pdev,
3390                                                         uioc.xferlen, data,
3391                                                         data_dma_hndl);
3392                                 }
3393
3394                                 free_local_pdev(pdev);
3395
3396                                 return rval;
3397                         }
3398
3399                         /*
3400                          * Is data going up-stream
3401                          */
3402                         if( uioc.xferlen && (uioc.flags & UIOC_RD) ) {
3403                                 if( copy_to_user((char __user *)(unsigned long) uxferaddr, data,
3404                                                         uioc.xferlen) ) {
3405
3406                                         rval = (-EFAULT);
3407                                 }
3408                         }
3409
3410                         if( uioc.xferlen ) {
3411                                 pci_free_consistent(pdev,
3412                                                 uioc.xferlen, data,
3413                                                 data_dma_hndl);
3414                         }
3415
3416                         free_local_pdev(pdev);
3417
3418                         return rval;
3419                 }
3420
3421         default:
3422                 return (-EINVAL);
3423         }
3424
3425         return 0;
3426 }
3427
3428 static long
3429 megadev_unlocked_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
3430 {
3431         int ret;
3432
3433         mutex_lock(&megadev_mutex);
3434         ret = megadev_ioctl(filep, cmd, arg);
3435         mutex_unlock(&megadev_mutex);
3436
3437         return ret;
3438 }
3439
3440 /**
3441  * mega_m_to_n()
3442  * @arg - user address
3443  * @uioc - new ioctl structure
3444  *
3445  * A thin layer to convert older mimd interface ioctl structure to NIT ioctl
3446  * structure
3447  *
3448  * Converts the older mimd ioctl structure to newer NIT structure
3449  */
3450 static int
3451 mega_m_to_n(void __user *arg, nitioctl_t *uioc)
3452 {
3453         struct uioctl_t uioc_mimd;
3454         char    signature[8] = {0};
3455         u8      opcode;
3456         u8      subopcode;
3457
3458
3459         /*
3460          * check is the application conforms to NIT. We do not have to do much
3461          * in that case.
3462          * We exploit the fact that the signature is stored in the very
3463          * beginning of the structure.
3464          */
3465
3466         if( copy_from_user(signature, arg, 7) )
3467                 return (-EFAULT);
3468
3469         if( memcmp(signature, "MEGANIT", 7) == 0 ) {
3470
3471                 /*
3472                  * NOTE NOTE: The nit ioctl is still under flux because of
3473                  * change of mailbox definition, in HPE. No applications yet
3474                  * use this interface and let's not have applications use this
3475                  * interface till the new specifitions are in place.
3476                  */
3477                 return -EINVAL;
3478 #if 0
3479                 if( copy_from_user(uioc, arg, sizeof(nitioctl_t)) )
3480                         return (-EFAULT);
3481                 return 0;
3482 #endif
3483         }
3484
3485         /*
3486          * Else assume we have mimd uioctl_t as arg. Convert to nitioctl_t
3487          *
3488          * Get the user ioctl structure
3489          */
3490         if( copy_from_user(&uioc_mimd, arg, sizeof(struct uioctl_t)) )
3491                 return (-EFAULT);
3492
3493
3494         /*
3495          * Get the opcode and subopcode for the commands
3496          */
3497         opcode = uioc_mimd.ui.fcs.opcode;
3498         subopcode = uioc_mimd.ui.fcs.subopcode;
3499
3500         switch (opcode) {
3501         case 0x82:
3502
3503                 switch (subopcode) {
3504
3505                 case MEGAIOC_QDRVRVER:  /* Query driver version */
3506                         uioc->opcode = GET_DRIVER_VER;
3507                         uioc->uioc_uaddr = uioc_mimd.data;
3508                         break;
3509
3510                 case MEGAIOC_QNADAP:    /* Get # of adapters */
3511                         uioc->opcode = GET_N_ADAP;
3512                         uioc->uioc_uaddr = uioc_mimd.data;
3513                         break;
3514
3515                 case MEGAIOC_QADAPINFO: /* Get adapter information */
3516                         uioc->opcode = GET_ADAP_INFO;
3517                         uioc->adapno = uioc_mimd.ui.fcs.adapno;
3518                         uioc->uioc_uaddr = uioc_mimd.data;
3519                         break;
3520
3521                 default:
3522                         return(-EINVAL);
3523                 }
3524
3525                 break;
3526
3527
3528         case 0x81:
3529
3530                 uioc->opcode = MBOX_CMD;
3531                 uioc->adapno = uioc_mimd.ui.fcs.adapno;
3532
3533                 memcpy(uioc->uioc_rmbox, uioc_mimd.mbox, 18);
3534
3535                 uioc->xferlen = uioc_mimd.ui.fcs.length;
3536
3537                 if( uioc_mimd.outlen ) uioc->flags = UIOC_RD;
3538                 if( uioc_mimd.inlen ) uioc->flags |= UIOC_WR;
3539
3540                 break;
3541
3542         case 0x80:
3543
3544                 uioc->opcode = MBOX_CMD;
3545                 uioc->adapno = uioc_mimd.ui.fcs.adapno;
3546
3547                 memcpy(uioc->uioc_rmbox, uioc_mimd.mbox, 18);
3548
3549                 /*
3550                  * Choose the xferlen bigger of input and output data
3551                  */
3552                 uioc->xferlen = uioc_mimd.outlen > uioc_mimd.inlen ?
3553                         uioc_mimd.outlen : uioc_mimd.inlen;
3554
3555                 if( uioc_mimd.outlen ) uioc->flags = UIOC_RD;
3556                 if( uioc_mimd.inlen ) uioc->flags |= UIOC_WR;
3557
3558                 break;
3559
3560         default:
3561                 return (-EINVAL);
3562
3563         }
3564
3565         return 0;
3566 }
3567
3568 /*
3569  * mega_n_to_m()
3570  * @arg - user address
3571  * @mc - mailbox command
3572  *
3573  * Updates the status information to the application, depending on application
3574  * conforms to older mimd ioctl interface or newer NIT ioctl interface
3575  */
3576 static int
3577 mega_n_to_m(void __user *arg, megacmd_t *mc)
3578 {
3579         nitioctl_t      __user *uiocp;
3580         megacmd_t       __user *umc;
3581         mega_passthru   __user *upthru;
3582         struct uioctl_t __user *uioc_mimd;
3583         char    signature[8] = {0};
3584
3585         /*
3586          * check is the application conforms to NIT.
3587          */
3588         if( copy_from_user(signature, arg, 7) )
3589                 return -EFAULT;
3590
3591         if( memcmp(signature, "MEGANIT", 7) == 0 ) {
3592
3593                 uiocp = arg;
3594
3595                 if( put_user(mc->status, (u8 __user *)&MBOX_P(uiocp)->status) )
3596                         return (-EFAULT);
3597
3598                 if( mc->cmd == MEGA_MBOXCMD_PASSTHRU ) {
3599
3600                         umc = MBOX_P(uiocp);
3601
3602                         if (get_user(upthru, (mega_passthru __user * __user *)&umc->xferaddr))
3603                                 return -EFAULT;
3604
3605                         if( put_user(mc->status, (u8 __user *)&upthru->scsistatus))
3606                                 return (-EFAULT);
3607                 }
3608         }
3609         else {
3610                 uioc_mimd = arg;
3611
3612                 if( put_user(mc->status, (u8 __user *)&uioc_mimd->mbox[17]) )
3613                         return (-EFAULT);
3614
3615                 if( mc->cmd == MEGA_MBOXCMD_PASSTHRU ) {
3616
3617                         umc = (megacmd_t __user *)uioc_mimd->mbox;
3618
3619                         if (get_user(upthru, (mega_passthru __user * __user *)&umc->xferaddr))
3620                                 return (-EFAULT);
3621
3622                         if( put_user(mc->status, (u8 __user *)&upthru->scsistatus) )
3623                                 return (-EFAULT);
3624                 }
3625         }
3626
3627         return 0;
3628 }
3629
3630
3631 /*
3632  * MEGARAID 'FW' commands.
3633  */
3634
3635 /**
3636  * mega_is_bios_enabled()
3637  * @adapter - pointer to our soft state
3638  *
3639  * issue command to find out if the BIOS is enabled for this controller
3640  */
3641 static int
3642 mega_is_bios_enabled(adapter_t *adapter)
3643 {
3644         unsigned char   raw_mbox[sizeof(struct mbox_out)];
3645         mbox_t  *mbox;
3646         int     ret;
3647
3648         mbox = (mbox_t *)raw_mbox;
3649
3650         memset(&mbox->m_out, 0, sizeof(raw_mbox));
3651
3652         memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
3653
3654         mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;
3655
3656         raw_mbox[0] = IS_BIOS_ENABLED;
3657         raw_mbox[2] = GET_BIOS;
3658
3659
3660         ret = issue_scb_block(adapter, raw_mbox);
3661
3662         return *(char *)adapter->mega_buffer;
3663 }
3664
3665
3666 /**
3667  * mega_enum_raid_scsi()
3668  * @adapter - pointer to our soft state
3669  *
3670  * Find out what channels are RAID/SCSI. This information is used to
3671  * differentiate the virtual channels and physical channels and to support
3672  * ROMB feature and non-disk devices.
3673  */
3674 static void
3675 mega_enum_raid_scsi(adapter_t *adapter)
3676 {
3677         unsigned char raw_mbox[sizeof(struct mbox_out)];
3678         mbox_t *mbox;
3679         int i;
3680
3681         mbox = (mbox_t *)raw_mbox;
3682
3683         memset(&mbox->m_out, 0, sizeof(raw_mbox));
3684
3685         /*
3686          * issue command to find out what channels are raid/scsi
3687          */
3688         raw_mbox[0] = CHNL_CLASS;
3689         raw_mbox[2] = GET_CHNL_CLASS;
3690
3691         memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
3692
3693         mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;
3694
3695         /*
3696          * Non-ROMB firmware fail this command, so all channels
3697          * must be shown RAID
3698          */
3699         adapter->mega_ch_class = 0xFF;
3700
3701         if(!issue_scb_block(adapter, raw_mbox)) {
3702                 adapter->mega_ch_class = *((char *)adapter->mega_buffer);
3703
3704         }
3705
3706         for( i = 0; i < adapter->product_info.nchannels; i++ ) {
3707                 if( (adapter->mega_ch_class >> i) & 0x01 ) {
3708                         printk(KERN_INFO "megaraid: channel[%d] is raid.\n",
3709                                         i);
3710                 }
3711                 else {
3712                         printk(KERN_INFO "megaraid: channel[%d] is scsi.\n",
3713                                         i);
3714                 }
3715         }
3716
3717         return;
3718 }
3719
3720
3721 /**
3722  * mega_get_boot_drv()
3723  * @adapter - pointer to our soft state
3724  *
3725  * Find out which device is the boot device. Note, any logical drive or any
3726  * phyical device (e.g., a CDROM) can be designated as a boot device.
3727  */
3728 static void
3729 mega_get_boot_drv(adapter_t *adapter)
3730 {
3731         struct private_bios_data        *prv_bios_data;
3732         unsigned char   raw_mbox[sizeof(struct mbox_out)];
3733         mbox_t  *mbox;
3734         u16     cksum = 0;
3735         u8      *cksum_p;
3736         u8      boot_pdrv;
3737         int     i;
3738
3739         mbox = (mbox_t *)raw_mbox;
3740
3741         memset(&mbox->m_out, 0, sizeof(raw_mbox));
3742
3743         raw_mbox[0] = BIOS_PVT_DATA;
3744         raw_mbox[2] = GET_BIOS_PVT_DATA;
3745
3746         memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
3747
3748         mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;
3749
3750         adapter->boot_ldrv_enabled = 0;
3751         adapter->boot_ldrv = 0;
3752
3753         adapter->boot_pdrv_enabled = 0;
3754         adapter->boot_pdrv_ch = 0;
3755         adapter->boot_pdrv_tgt = 0;
3756
3757         if(issue_scb_block(adapter, raw_mbox) == 0) {
3758                 prv_bios_data =
3759                         (struct private_bios_data *)adapter->mega_buffer;
3760
3761                 cksum = 0;
3762                 cksum_p = (char *)prv_bios_data;
3763                 for (i = 0; i < 14; i++ ) {
3764                         cksum += (u16)(*cksum_p++);
3765                 }
3766
3767                 if (prv_bios_data->cksum == (u16)(0-cksum) ) {
3768
3769                         /*
3770                          * If MSB is set, a physical drive is set as boot
3771                          * device
3772                          */
3773                         if( prv_bios_data->boot_drv & 0x80 ) {
3774                                 adapter->boot_pdrv_enabled = 1;
3775                                 boot_pdrv = prv_bios_data->boot_drv & 0x7F;
3776                                 adapter->boot_pdrv_ch = boot_pdrv / 16;
3777                                 adapter->boot_pdrv_tgt = boot_pdrv % 16;
3778                         }
3779                         else {
3780                                 adapter->boot_ldrv_enabled = 1;
3781                                 adapter->boot_ldrv = prv_bios_data->boot_drv;
3782                         }
3783                 }
3784         }
3785
3786 }
3787
3788 /**
3789  * mega_support_random_del()
3790  * @adapter - pointer to our soft state
3791  *
3792  * Find out if this controller supports random deletion and addition of
3793  * logical drives
3794  */
3795 static int
3796 mega_support_random_del(adapter_t *adapter)
3797 {
3798         unsigned char raw_mbox[sizeof(struct mbox_out)];
3799         mbox_t *mbox;
3800         int rval;
3801
3802         mbox = (mbox_t *)raw_mbox;
3803
3804         memset(&mbox->m_out, 0, sizeof(raw_mbox));
3805
3806         /*
3807          * issue command
3808          */
3809         raw_mbox[0] = FC_DEL_LOGDRV;
3810         raw_mbox[2] = OP_SUP_DEL_LOGDRV;
3811
3812         rval = issue_scb_block(adapter, raw_mbox);
3813
3814         return !rval;
3815 }
3816
3817
3818 /**
3819  * mega_support_ext_cdb()
3820  * @adapter - pointer to our soft state
3821  *
3822  * Find out if this firmware support cdblen > 10
3823  */
3824 static int
3825 mega_support_ext_cdb(adapter_t *adapter)
3826 {
3827         unsigned char raw_mbox[sizeof(struct mbox_out)];
3828         mbox_t *mbox;
3829         int rval;
3830
3831         mbox = (mbox_t *)raw_mbox;
3832
3833         memset(&mbox->m_out, 0, sizeof(raw_mbox));
3834         /*
3835          * issue command to find out if controller supports extended CDBs.
3836          */
3837         raw_mbox[0] = 0xA4;
3838         raw_mbox[2] = 0x16;
3839
3840         rval = issue_scb_block(adapter, raw_mbox);
3841
3842         return !rval;
3843 }
3844
3845
3846 /**
3847  * mega_del_logdrv()
3848  * @adapter - pointer to our soft state
3849  * @logdrv - logical drive to be deleted
3850  *
3851  * Delete the specified logical drive. It is the responsibility of the user
3852  * app to let the OS know about this operation.
3853  */
3854 static int
3855 mega_del_logdrv(adapter_t *adapter, int logdrv)
3856 {
3857         unsigned long flags;
3858         scb_t *scb;
3859         int rval;
3860
3861         /*
3862          * Stop sending commands to the controller, queue them internally.
3863          * When deletion is complete, ISR will flush the queue.
3864          */
3865         atomic_set(&adapter->quiescent, 1);
3866
3867         /*
3868          * Wait till all the issued commands are complete and there are no
3869          * commands in the pending queue
3870          */
3871         while (atomic_read(&adapter->pend_cmds) > 0 ||
3872                !list_empty(&adapter->pending_list))
3873                 msleep(1000);   /* sleep for 1s */
3874
3875         rval = mega_do_del_logdrv(adapter, logdrv);
3876
3877         spin_lock_irqsave(&adapter->lock, flags);
3878
3879         /*
3880          * If delete operation was successful, add 0x80 to the logical drive
3881          * ids for commands in the pending queue.
3882          */
3883         if (adapter->read_ldidmap) {
3884                 struct list_head *pos;
3885                 list_for_each(pos, &adapter->pending_list) {
3886                         scb = list_entry(pos, scb_t, list);
3887                         if (scb->pthru->logdrv < 0x80 )
3888                                 scb->pthru->logdrv += 0x80;
3889                 }
3890         }
3891
3892         atomic_set(&adapter->quiescent, 0);
3893
3894         mega_runpendq(adapter);
3895
3896         spin_unlock_irqrestore(&adapter->lock, flags);
3897
3898         return rval;
3899 }
3900
3901
3902 static int
3903 mega_do_del_logdrv(adapter_t *adapter, int logdrv)
3904 {
3905         megacmd_t       mc;
3906         int     rval;
3907
3908         memset( &mc, 0, sizeof(megacmd_t));
3909
3910         mc.cmd = FC_DEL_LOGDRV;
3911         mc.opcode = OP_DEL_LOGDRV;
3912         mc.subopcode = logdrv;
3913
3914         rval = mega_internal_command(adapter, &mc, NULL);
3915
3916         /* log this event */
3917         if(rval) {
3918                 printk(KERN_WARNING "megaraid: Delete LD-%d failed.", logdrv);
3919                 return rval;
3920         }
3921
3922         /*
3923          * After deleting first logical drive, the logical drives must be
3924          * addressed by adding 0x80 to the logical drive id.
3925          */
3926         adapter->read_ldidmap = 1;
3927
3928         return rval;
3929 }
3930
3931
3932 /**
3933  * mega_get_max_sgl()
3934  * @adapter - pointer to our soft state
3935  *
3936  * Find out the maximum number of scatter-gather elements supported by this
3937  * version of the firmware
3938  */
3939 static void
3940 mega_get_max_sgl(adapter_t *adapter)
3941 {
3942         unsigned char   raw_mbox[sizeof(struct mbox_out)];
3943         mbox_t  *mbox;
3944
3945         mbox = (mbox_t *)raw_mbox;
3946
3947         memset(mbox, 0, sizeof(raw_mbox));
3948
3949         memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
3950
3951         mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;
3952
3953         raw_mbox[0] = MAIN_MISC_OPCODE;
3954         raw_mbox[2] = GET_MAX_SG_SUPPORT;
3955
3956
3957         if( issue_scb_block(adapter, raw_mbox) ) {
3958                 /*
3959                  * f/w does not support this command. Choose the default value
3960                  */
3961                 adapter->sglen = MIN_SGLIST;
3962         }
3963         else {
3964                 adapter->sglen = *((char *)adapter->mega_buffer);
3965
3966                 /*
3967                  * Make sure this is not more than the resources we are
3968                  * planning to allocate
3969                  */
3970                 if ( adapter->sglen > MAX_SGLIST )
3971                         adapter->sglen = MAX_SGLIST;
3972         }
3973
3974         return;
3975 }
3976
3977
3978 /**
3979  * mega_support_cluster()
3980  * @adapter - pointer to our soft state
3981  *
3982  * Find out if this firmware support cluster calls.
3983  */
3984 static int
3985 mega_support_cluster(adapter_t *adapter)
3986 {
3987         unsigned char   raw_mbox[sizeof(struct mbox_out)];
3988         mbox_t  *mbox;
3989
3990         mbox = (mbox_t *)raw_mbox;
3991
3992         memset(mbox, 0, sizeof(raw_mbox));
3993
3994         memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
3995
3996         mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;
3997
3998         /*
3999          * Try to get the initiator id. This command will succeed iff the
4000          * clustering is available on this HBA.
4001          */
4002         raw_mbox[0] = MEGA_GET_TARGET_ID;
4003
4004         if( issue_scb_block(adapter, raw_mbox) == 0 ) {
4005
4006                 /*
4007                  * Cluster support available. Get the initiator target id.
4008                  * Tell our id to mid-layer too.
4009                  */
4010                 adapter->this_id = *(u32 *)adapter->mega_buffer;
4011                 adapter->host->this_id = adapter->this_id;
4012
4013                 return 1;
4014         }
4015
4016         return 0;
4017 }
4018
4019 #ifdef CONFIG_PROC_FS
4020 /**
4021  * mega_adapinq()
4022  * @adapter - pointer to our soft state
4023  * @dma_handle - DMA address of the buffer
4024  *
4025  * Issue internal commands while interrupts are available.
4026  * We only issue direct mailbox commands from within the driver. ioctl()
4027  * interface using these routines can issue passthru commands.
4028  */
4029 static int
4030 mega_adapinq(adapter_t *adapter, dma_addr_t dma_handle)
4031 {
4032         megacmd_t       mc;
4033
4034         memset(&mc, 0, sizeof(megacmd_t));
4035
4036         if( adapter->flag & BOARD_40LD ) {
4037                 mc.cmd = FC_NEW_CONFIG;
4038                 mc.opcode = NC_SUBOP_ENQUIRY3;
4039                 mc.subopcode = ENQ3_GET_SOLICITED_FULL;
4040         }
4041         else {
4042                 mc.cmd = MEGA_MBOXCMD_ADPEXTINQ;
4043         }
4044
4045         mc.xferaddr = (u32)dma_handle;
4046
4047         if ( mega_internal_command(adapter, &mc, NULL) != 0 ) {
4048                 return -1;
4049         }
4050
4051         return 0;
4052 }
4053
4054
4055 /** mega_internal_dev_inquiry()
4056  * @adapter - pointer to our soft state
4057  * @ch - channel for this device
4058  * @tgt - ID of this device
4059  * @buf_dma_handle - DMA address of the buffer
4060  *
4061  * Issue the scsi inquiry for the specified device.
4062  */
4063 static int
4064 mega_internal_dev_inquiry(adapter_t *adapter, u8 ch, u8 tgt,
4065                 dma_addr_t buf_dma_handle)
4066 {
4067         mega_passthru   *pthru;
4068         dma_addr_t      pthru_dma_handle;
4069         megacmd_t       mc;
4070         int             rval;
4071         struct pci_dev  *pdev;
4072
4073
4074         /*
4075          * For all internal commands, the buffer must be allocated in <4GB
4076          * address range
4077          */
4078         if( make_local_pdev(adapter, &pdev) != 0 ) return -1;
4079
4080         pthru = pci_alloc_consistent(pdev, sizeof(mega_passthru),
4081                         &pthru_dma_handle);
4082
4083         if( pthru == NULL ) {
4084                 free_local_pdev(pdev);
4085                 return -1;
4086         }
4087
4088         pthru->timeout = 2;
4089         pthru->ars = 1;
4090         pthru->reqsenselen = 14;
4091         pthru->islogical = 0;
4092
4093         pthru->channel = (adapter->flag & BOARD_40LD) ? 0 : ch;
4094
4095         pthru->target = (adapter->flag & BOARD_40LD) ? (ch << 4)|tgt : tgt;
4096
4097         pthru->cdblen = 6;
4098
4099         pthru->cdb[0] = INQUIRY;
4100         pthru->cdb[1] = 0;
4101         pthru->cdb[2] = 0;
4102         pthru->cdb[3] = 0;
4103         pthru->cdb[4] = 255;
4104         pthru->cdb[5] = 0;
4105
4106
4107         pthru->dataxferaddr = (u32)buf_dma_handle;
4108         pthru->dataxferlen = 256;
4109
4110         memset(&mc, 0, sizeof(megacmd_t));
4111
4112         mc.cmd = MEGA_MBOXCMD_PASSTHRU;
4113         mc.xferaddr = (u32)pthru_dma_handle;
4114
4115         rval = mega_internal_command(adapter, &mc, pthru);
4116
4117         pci_free_consistent(pdev, sizeof(mega_passthru), pthru,
4118                         pthru_dma_handle);
4119
4120         free_local_pdev(pdev);
4121
4122         return rval;
4123 }
4124 #endif
4125
4126 /**
4127  * mega_internal_command()
4128  * @adapter - pointer to our soft state
4129  * @mc - the mailbox command
4130  * @pthru - Passthru structure for DCDB commands
4131  *
4132  * Issue the internal commands in interrupt mode.
4133  * The last argument is the address of the passthru structure if the command
4134  * to be fired is a passthru command
4135  *
4136  * lockscope specifies whether the caller has already acquired the lock. Of
4137  * course, the caller must know which lock we are talking about.
4138  *
4139  * Note: parameter 'pthru' is null for non-passthru commands.
4140  */
4141 static int
4142 mega_internal_command(adapter_t *adapter, megacmd_t *mc, mega_passthru *pthru)
4143 {
4144         Scsi_Cmnd       *scmd;
4145         struct  scsi_device *sdev;
4146         scb_t   *scb;
4147         int     rval;
4148
4149         scmd = scsi_allocate_command(GFP_KERNEL);
4150         if (!scmd)
4151                 return -ENOMEM;
4152
4153         /*
4154          * The internal commands share one command id and hence are
4155          * serialized. This is so because we want to reserve maximum number of
4156          * available command ids for the I/O commands.
4157          */
4158         mutex_lock(&adapter->int_mtx);
4159
4160         scb = &adapter->int_scb;
4161         memset(scb, 0, sizeof(scb_t));
4162
4163         sdev = kzalloc(sizeof(struct scsi_device), GFP_KERNEL);
4164         scmd->device = sdev;
4165
4166         memset(adapter->int_cdb, 0, sizeof(adapter->int_cdb));
4167         scmd->cmnd = adapter->int_cdb;
4168         scmd->device->host = adapter->host;
4169         scmd->host_scribble = (void *)scb;
4170         scmd->cmnd[0] = MEGA_INTERNAL_CMD;
4171
4172         scb->state |= SCB_ACTIVE;
4173         scb->cmd = scmd;
4174
4175         memcpy(scb->raw_mbox, mc, sizeof(megacmd_t));
4176
4177         /*
4178          * Is it a passthru command
4179          */
4180         if( mc->cmd == MEGA_MBOXCMD_PASSTHRU ) {
4181
4182                 scb->pthru = pthru;
4183         }
4184
4185         scb->idx = CMDID_INT_CMDS;
4186
4187         megaraid_queue_lck(scmd, mega_internal_done);
4188
4189         wait_for_completion(&adapter->int_waitq);
4190
4191         rval = scmd->result;
4192         mc->status = scmd->result;
4193         kfree(sdev);
4194
4195         /*
4196          * Print a debug message for all failed commands. Applications can use
4197          * this information.
4198          */
4199         if( scmd->result && trace_level ) {
4200                 printk("megaraid: cmd [%x, %x, %x] status:[%x]\n",
4201                         mc->cmd, mc->opcode, mc->subopcode, scmd->result);
4202         }
4203
4204         mutex_unlock(&adapter->int_mtx);
4205
4206         scsi_free_command(GFP_KERNEL, scmd);
4207
4208         return rval;
4209 }
4210
4211
4212 /**
4213  * mega_internal_done()
4214  * @scmd - internal scsi command
4215  *
4216  * Callback routine for internal commands.
4217  */
4218 static void
4219 mega_internal_done(Scsi_Cmnd *scmd)
4220 {
4221         adapter_t       *adapter;
4222
4223         adapter = (adapter_t *)scmd->device->host->hostdata;
4224
4225         complete(&adapter->int_waitq);
4226
4227 }
4228
4229
4230 static struct scsi_host_template megaraid_template = {
4231         .module                         = THIS_MODULE,
4232         .name                           = "MegaRAID",
4233         .proc_name                      = "megaraid_legacy",
4234         .info                           = megaraid_info,
4235         .queuecommand                   = megaraid_queue,
4236         .bios_param                     = megaraid_biosparam,
4237         .max_sectors                    = MAX_SECTORS_PER_IO,
4238         .can_queue                      = MAX_COMMANDS,
4239         .this_id                        = DEFAULT_INITIATOR_ID,
4240         .sg_tablesize                   = MAX_SGLIST,
4241         .cmd_per_lun                    = DEF_CMD_PER_LUN,
4242         .use_clustering                 = ENABLE_CLUSTERING,
4243         .eh_abort_handler               = megaraid_abort,
4244         .eh_device_reset_handler        = megaraid_reset,
4245         .eh_bus_reset_handler           = megaraid_reset,
4246         .eh_host_reset_handler          = megaraid_reset,
4247 };
4248
4249 static int
4250 megaraid_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
4251 {
4252         struct Scsi_Host *host;
4253         adapter_t *adapter;
4254         unsigned long mega_baseport, tbase, flag = 0;
4255         u16 subsysid, subsysvid;
4256         u8 pci_bus, pci_dev_func;
4257         int irq, i, j;
4258         int error = -ENODEV;
4259
4260         if (pci_enable_device(pdev))
4261                 goto out;
4262         pci_set_master(pdev);
4263
4264         pci_bus = pdev->bus->number;
4265         pci_dev_func = pdev->devfn;
4266
4267         /*
4268          * The megaraid3 stuff reports the ID of the Intel part which is not
4269          * remotely specific to the megaraid
4270          */
4271         if (pdev->vendor == PCI_VENDOR_ID_INTEL) {
4272                 u16 magic;
4273                 /*
4274                  * Don't fall over the Compaq management cards using the same
4275                  * PCI identifier
4276                  */
4277                 if (pdev->subsystem_vendor == PCI_VENDOR_ID_COMPAQ &&
4278                     pdev->subsystem_device == 0xC000)
4279                         return -ENODEV;
4280                 /* Now check the magic signature byte */
4281                 pci_read_config_word(pdev, PCI_CONF_AMISIG, &magic);
4282                 if (magic != HBA_SIGNATURE_471 && magic != HBA_SIGNATURE)
4283                         return -ENODEV;
4284                 /* Ok it is probably a megaraid */
4285         }
4286
4287         /*
4288          * For these vendor and device ids, signature offsets are not
4289          * valid and 64 bit is implicit
4290          */
4291         if (id->driver_data & BOARD_64BIT)
4292                 flag |= BOARD_64BIT;
4293         else {
4294                 u32 magic64;
4295
4296                 pci_read_config_dword(pdev, PCI_CONF_AMISIG64, &magic64);
4297                 if (magic64 == HBA_SIGNATURE_64BIT)
4298                         flag |= BOARD_64BIT;
4299         }
4300
4301         subsysvid = pdev->subsystem_vendor;
4302         subsysid = pdev->subsystem_device;
4303
4304         printk(KERN_NOTICE "megaraid: found 0x%4.04x:0x%4.04x:bus %d:",
4305                 id->vendor, id->device, pci_bus);
4306
4307         printk("slot %d:func %d\n",
4308                 PCI_SLOT(pci_dev_func), PCI_FUNC(pci_dev_func));
4309
4310         /* Read the base port and IRQ from PCI */
4311         mega_baseport = pci_resource_start(pdev, 0);
4312         irq = pdev->irq;
4313
4314         tbase = mega_baseport;
4315         if (pci_resource_flags(pdev, 0) & IORESOURCE_MEM) {
4316                 flag |= BOARD_MEMMAP;
4317
4318                 if (!request_mem_region(mega_baseport, 128, "megaraid")) {
4319                         printk(KERN_WARNING "megaraid: mem region busy!\n");
4320                         goto out_disable_device;
4321                 }
4322
4323                 mega_baseport = (unsigned long)ioremap(mega_baseport, 128);
4324                 if (!mega_baseport) {
4325                         printk(KERN_WARNING
4326                                "megaraid: could not map hba memory\n");
4327                         goto out_release_region;
4328                 }
4329         } else {
4330                 flag |= BOARD_IOMAP;
4331                 mega_baseport += 0x10;
4332
4333                 if (!request_region(mega_baseport, 16, "megaraid"))
4334                         goto out_disable_device;
4335         }
4336
4337         /* Initialize SCSI Host structure */
4338         host = scsi_host_alloc(&megaraid_template, sizeof(adapter_t));
4339         if (!host)
4340                 goto out_iounmap;
4341
4342         adapter = (adapter_t *)host->hostdata;
4343         memset(adapter, 0, sizeof(adapter_t));
4344
4345         printk(KERN_NOTICE
4346                 "scsi%d:Found MegaRAID controller at 0x%lx, IRQ:%d\n",
4347                 host->host_no, mega_baseport, irq);
4348
4349         adapter->base = mega_baseport;
4350         if (flag & BOARD_MEMMAP)
4351                 adapter->mmio_base = (void __iomem *) mega_baseport;
4352
4353         INIT_LIST_HEAD(&adapter->free_list);
4354         INIT_LIST_HEAD(&adapter->pending_list);
4355         INIT_LIST_HEAD(&adapter->completed_list);
4356
4357         adapter->flag = flag;
4358         spin_lock_init(&adapter->lock);
4359
4360         host->cmd_per_lun = max_cmd_per_lun;
4361         host->max_sectors = max_sectors_per_io;
4362
4363         adapter->dev = pdev;
4364         adapter->host = host;
4365
4366         adapter->host->irq = irq;
4367
4368         if (flag & BOARD_MEMMAP)
4369                 adapter->host->base = tbase;
4370         else {
4371                 adapter->host->io_port = tbase;
4372                 adapter->host->n_io_port = 16;
4373         }
4374
4375         adapter->host->unique_id = (pci_bus << 8) | pci_dev_func;
4376
4377         /*
4378          * Allocate buffer to issue internal commands.
4379          */
4380         adapter->mega_buffer = pci_alloc_consistent(adapter->dev,
4381                 MEGA_BUFFER_SIZE, &adapter->buf_dma_handle);
4382         if (!adapter->mega_buffer) {
4383                 printk(KERN_WARNING "megaraid: out of RAM.\n");
4384                 goto out_host_put;
4385         }
4386
4387         adapter->scb_list = kmalloc(sizeof(scb_t) * MAX_COMMANDS, GFP_KERNEL);
4388         if (!adapter->scb_list) {
4389                 printk(KERN_WARNING "megaraid: out of RAM.\n");
4390                 goto out_free_cmd_buffer;
4391         }
4392
4393         if (request_irq(irq, (adapter->flag & BOARD_MEMMAP) ?
4394                                 megaraid_isr_memmapped : megaraid_isr_iomapped,
4395                                         IRQF_SHARED, "megaraid", adapter)) {
4396                 printk(KERN_WARNING
4397                         "megaraid: Couldn't register IRQ %d!\n", irq);
4398                 goto out_free_scb_list;
4399         }
4400
4401         if (mega_setup_mailbox(adapter))
4402                 goto out_free_irq;
4403
4404         if (mega_query_adapter(adapter))
4405                 goto out_free_mbox;
4406
4407         /*
4408          * Have checks for some buggy f/w
4409          */
4410         if ((subsysid == 0x1111) && (subsysvid == 0x1111)) {
4411                 /*
4412                  * Which firmware
4413                  */
4414                 if (!strcmp(adapter->fw_version, "3.00") ||
4415                                 !strcmp(adapter->fw_version, "3.01")) {
4416
4417                         printk( KERN_WARNING
4418                                 "megaraid: Your  card is a Dell PERC "
4419                                 "2/SC RAID controller with  "
4420                                 "firmware\nmegaraid: 3.00 or 3.01.  "
4421                                 "This driver is known to have "
4422                                 "corruption issues\nmegaraid: with "
4423                                 "those firmware versions on this "
4424                                 "specific card.  In order\nmegaraid: "
4425                                 "to protect your data, please upgrade "
4426                                 "your firmware to version\nmegaraid: "
4427                                 "3.10 or later, available from the "
4428                                 "Dell Technical Support web\n"
4429                                 "megaraid: site at\nhttp://support."
4430                                 "dell.com/us/en/filelib/download/"
4431                                 "index.asp?fileid=2940\n"
4432                         );
4433                 }
4434         }
4435
4436         /*
4437          * If we have a HP 1M(0x60E7)/2M(0x60E8) controller with
4438          * firmware H.01.07, H.01.08, and H.01.09 disable 64 bit
4439          * support, since this firmware cannot handle 64 bit
4440          * addressing
4441          */
4442         if ((subsysvid == PCI_VENDOR_ID_HP) &&
4443             ((subsysid == 0x60E7) || (subsysid == 0x60E8))) {
4444                 /*
4445                  * which firmware
4446                  */
4447                 if (!strcmp(adapter->fw_version, "H01.07") ||
4448                     !strcmp(adapter->fw_version, "H01.08") ||
4449                     !strcmp(adapter->fw_version, "H01.09") ) {
4450                         printk(KERN_WARNING
4451                                 "megaraid: Firmware H.01.07, "
4452                                 "H.01.08, and H.01.09 on 1M/2M "
4453                                 "controllers\n"
4454                                 "megaraid: do not support 64 bit "
4455                                 "addressing.\nmegaraid: DISABLING "
4456                                 "64 bit support.\n");
4457                         adapter->flag &= ~BOARD_64BIT;
4458                 }
4459         }
4460
4461         if (mega_is_bios_enabled(adapter))
4462                 mega_hbas[hba_count].is_bios_enabled = 1;
4463         mega_hbas[hba_count].hostdata_addr = adapter;
4464
4465         /*
4466          * Find out which channel is raid and which is scsi. This is
4467          * for ROMB support.
4468          */
4469         mega_enum_raid_scsi(adapter);
4470
4471         /*
4472          * Find out if a logical drive is set as the boot drive. If
4473          * there is one, will make that as the first logical drive.
4474          * ROMB: Do we have to boot from a physical drive. Then all
4475          * the physical drives would appear before the logical disks.
4476          * Else, all the physical drives would be exported to the mid
4477          * layer after logical drives.
4478          */
4479         mega_get_boot_drv(adapter);
4480
4481         if (adapter->boot_pdrv_enabled) {
4482                 j = adapter->product_info.nchannels;
4483                 for( i = 0; i < j; i++ )
4484                         adapter->logdrv_chan[i] = 0;
4485                 for( i = j; i < NVIRT_CHAN + j; i++ )
4486                         adapter->logdrv_chan[i] = 1;
4487         } else {
4488                 for (i = 0; i < NVIRT_CHAN; i++)
4489                         adapter->logdrv_chan[i] = 1;
4490                 for (i = NVIRT_CHAN; i < MAX_CHANNELS+NVIRT_CHAN; i++)
4491                         adapter->logdrv_chan[i] = 0;
4492                 adapter->mega_ch_class <<= NVIRT_CHAN;
4493         }
4494
4495         /*
4496          * Do we support random deletion and addition of logical
4497          * drives
4498          */
4499         adapter->read_ldidmap = 0;      /* set it after first logdrv
4500                                                    delete cmd */
4501         adapter->support_random_del = mega_support_random_del(adapter);
4502
4503         /* Initialize SCBs */
4504         if (mega_init_scb(adapter))
4505                 goto out_free_mbox;
4506
4507         /*
4508          * Reset the pending commands counter
4509          */
4510         atomic_set(&adapter->pend_cmds, 0);
4511
4512         /*
4513          * Reset the adapter quiescent flag
4514          */
4515         atomic_set(&adapter->quiescent, 0);
4516
4517         hba_soft_state[hba_count] = adapter;
4518
4519         /*
4520          * Fill in the structure which needs to be passed back to the
4521          * application when it does an ioctl() for controller related
4522          * information.
4523          */
4524         i = hba_count;
4525
4526         mcontroller[i].base = mega_baseport;
4527         mcontroller[i].irq = irq;
4528         mcontroller[i].numldrv = adapter->numldrv;
4529         mcontroller[i].pcibus = pci_bus;
4530         mcontroller[i].pcidev = id->device;
4531         mcontroller[i].pcifun = PCI_FUNC (pci_dev_func);
4532         mcontroller[i].pciid = -1;
4533         mcontroller[i].pcivendor = id->vendor;
4534         mcontroller[i].pcislot = PCI_SLOT(pci_dev_func);
4535         mcontroller[i].uid = (pci_bus << 8) | pci_dev_func;
4536
4537
4538         /* Set the Mode of addressing to 64 bit if we can */
4539         if ((adapter->flag & BOARD_64BIT) && (sizeof(dma_addr_t) == 8)) {
4540                 pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
4541                 adapter->has_64bit_addr = 1;
4542         } else  {
4543                 pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
4544                 adapter->has_64bit_addr = 0;
4545         }
4546
4547         mutex_init(&adapter->int_mtx);
4548         init_completion(&adapter->int_waitq);
4549
4550         adapter->this_id = DEFAULT_INITIATOR_ID;
4551         adapter->host->this_id = DEFAULT_INITIATOR_ID;
4552
4553 #if MEGA_HAVE_CLUSTERING
4554         /*
4555          * Is cluster support enabled on this controller
4556          * Note: In a cluster the HBAs ( the initiators ) will have
4557          * different target IDs and we cannot assume it to be 7. Call
4558          * to mega_support_cluster() will get the target ids also if
4559          * the cluster support is available
4560          */
4561         adapter->has_cluster = mega_support_cluster(adapter);
4562         if (adapter->has_cluster) {
4563                 printk(KERN_NOTICE
4564                         "megaraid: Cluster driver, initiator id:%d\n",
4565                         adapter->this_id);
4566         }
4567 #endif
4568
4569         pci_set_drvdata(pdev, host);
4570
4571         mega_create_proc_entry(hba_count, mega_proc_dir_entry);
4572
4573         error = scsi_add_host(host, &pdev->dev);
4574         if (error)
4575                 goto out_free_mbox;
4576
4577         scsi_scan_host(host);
4578         hba_count++;
4579         return 0;
4580
4581  out_free_mbox:
4582         pci_free_consistent(adapter->dev, sizeof(mbox64_t),
4583                         adapter->una_mbox64, adapter->una_mbox64_dma);
4584  out_free_irq:
4585         free_irq(adapter->host->irq, adapter);
4586  out_free_scb_list:
4587         kfree(adapter->scb_list);
4588  out_free_cmd_buffer:
4589         pci_free_consistent(adapter->dev, MEGA_BUFFER_SIZE,
4590                         adapter->mega_buffer, adapter->buf_dma_handle);
4591  out_host_put:
4592         scsi_host_put(host);
4593  out_iounmap:
4594         if (flag & BOARD_MEMMAP)
4595                 iounmap((void *)mega_baseport);
4596  out_release_region:
4597         if (flag & BOARD_MEMMAP)
4598                 release_mem_region(tbase, 128);
4599         else
4600                 release_region(mega_baseport, 16);
4601  out_disable_device:
4602         pci_disable_device(pdev);
4603  out:
4604         return error;
4605 }
4606
4607 static void
4608 __megaraid_shutdown(adapter_t *adapter)
4609 {
4610         u_char  raw_mbox[sizeof(struct mbox_out)];
4611         mbox_t  *mbox = (mbox_t *)raw_mbox;
4612         int     i;
4613
4614         /* Flush adapter cache */
4615         memset(&mbox->m_out, 0, sizeof(raw_mbox));
4616         raw_mbox[0] = FLUSH_ADAPTER;
4617
4618         free_irq(adapter->host->irq, adapter);
4619
4620         /* Issue a blocking (interrupts disabled) command to the card */
4621         issue_scb_block(adapter, raw_mbox);
4622
4623         /* Flush disks cache */
4624         memset(&mbox->m_out, 0, sizeof(raw_mbox));
4625         raw_mbox[0] = FLUSH_SYSTEM;
4626
4627         /* Issue a blocking (interrupts disabled) command to the card */
4628         issue_scb_block(adapter, raw_mbox);
4629
4630         if (atomic_read(&adapter->pend_cmds) > 0)
4631                 printk(KERN_WARNING "megaraid: pending commands!!\n");
4632
4633         /*
4634          * Have a delibrate delay to make sure all the caches are
4635          * actually flushed.
4636          */
4637         for (i = 0; i <= 10; i++)
4638                 mdelay(1000);
4639 }
4640
4641 static void
4642 megaraid_remove_one(struct pci_dev *pdev)
4643 {
4644         struct Scsi_Host *host = pci_get_drvdata(pdev);
4645         adapter_t *adapter = (adapter_t *)host->hostdata;
4646
4647         scsi_remove_host(host);
4648
4649         __megaraid_shutdown(adapter);
4650
4651         /* Free our resources */
4652         if (adapter->flag & BOARD_MEMMAP) {
4653                 iounmap((void *)adapter->base);
4654                 release_mem_region(adapter->host->base, 128);
4655         } else
4656                 release_region(adapter->base, 16);
4657
4658         mega_free_sgl(adapter);
4659
4660 #ifdef CONFIG_PROC_FS
4661         if (adapter->controller_proc_dir_entry) {
4662                 remove_proc_entry("stat", adapter->controller_proc_dir_entry);
4663                 remove_proc_entry("config",
4664                                 adapter->controller_proc_dir_entry);
4665                 remove_proc_entry("mailbox",
4666                                 adapter->controller_proc_dir_entry);
4667 #if MEGA_HAVE_ENH_PROC
4668                 remove_proc_entry("rebuild-rate",
4669                                 adapter->controller_proc_dir_entry);
4670                 remove_proc_entry("battery-status",
4671                                 adapter->controller_proc_dir_entry);
4672
4673                 remove_proc_entry("diskdrives-ch0",
4674                                 adapter->controller_proc_dir_entry);
4675                 remove_proc_entry("diskdrives-ch1",
4676                                 adapter->controller_proc_dir_entry);
4677                 remove_proc_entry("diskdrives-ch2",
4678                                 adapter->controller_proc_dir_entry);
4679                 remove_proc_entry("diskdrives-ch3",
4680                                 adapter->controller_proc_dir_entry);
4681
4682                 remove_proc_entry("raiddrives-0-9",
4683                                 adapter->controller_proc_dir_entry);
4684                 remove_proc_entry("raiddrives-10-19",
4685                                 adapter->controller_proc_dir_entry);
4686                 remove_proc_entry("raiddrives-20-29",
4687                                 adapter->controller_proc_dir_entry);
4688                 remove_proc_entry("raiddrives-30-39",
4689                                 adapter->controller_proc_dir_entry);
4690 #endif
4691                 {
4692                         char    buf[12] = { 0 };
4693                         sprintf(buf, "hba%d", adapter->host->host_no);
4694                         remove_proc_entry(buf, mega_proc_dir_entry);
4695                 }
4696         }
4697 #endif
4698
4699         pci_free_consistent(adapter->dev, MEGA_BUFFER_SIZE,
4700                         adapter->mega_buffer, adapter->buf_dma_handle);
4701         kfree(adapter->scb_list);
4702         pci_free_consistent(adapter->dev, sizeof(mbox64_t),
4703                         adapter->una_mbox64, adapter->una_mbox64_dma);
4704
4705         scsi_host_put(host);
4706         pci_disable_device(pdev);
4707
4708         hba_count--;
4709 }
4710
4711 static void
4712 megaraid_shutdown(struct pci_dev *pdev)
4713 {
4714         struct Scsi_Host *host = pci_get_drvdata(pdev);
4715         adapter_t *adapter = (adapter_t *)host->hostdata;
4716
4717         __megaraid_shutdown(adapter);
4718 }
4719
4720 static struct pci_device_id megaraid_pci_tbl[] = {
4721         {PCI_VENDOR_ID_AMI, PCI_DEVICE_ID_AMI_MEGARAID,
4722                 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
4723         {PCI_VENDOR_ID_AMI, PCI_DEVICE_ID_AMI_MEGARAID2,
4724                 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
4725         {PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_AMI_MEGARAID3,
4726                 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
4727         {0,}
4728 };
4729 MODULE_DEVICE_TABLE(pci, megaraid_pci_tbl);
4730
4731 static struct pci_driver megaraid_pci_driver = {
4732         .name           = "megaraid_legacy",
4733         .id_table       = megaraid_pci_tbl,
4734         .probe          = megaraid_probe_one,
4735         .remove         = megaraid_remove_one,
4736         .shutdown       = megaraid_shutdown,
4737 };
4738
4739 static int __init megaraid_init(void)
4740 {
4741         int error;
4742
4743         if ((max_cmd_per_lun <= 0) || (max_cmd_per_lun > MAX_CMD_PER_LUN))
4744                 max_cmd_per_lun = MAX_CMD_PER_LUN;
4745         if (max_mbox_busy_wait > MBOX_BUSY_WAIT)
4746                 max_mbox_busy_wait = MBOX_BUSY_WAIT;
4747
4748 #ifdef CONFIG_PROC_FS
4749         mega_proc_dir_entry = proc_mkdir("megaraid", NULL);
4750         if (!mega_proc_dir_entry) {
4751                 printk(KERN_WARNING
4752                                 "megaraid: failed to create megaraid root\n");
4753         }
4754 #endif
4755         error = pci_register_driver(&megaraid_pci_driver);
4756         if (error) {
4757 #ifdef CONFIG_PROC_FS
4758                 remove_proc_entry("megaraid", NULL);
4759 #endif
4760                 return error;
4761         }
4762
4763         /*
4764          * Register the driver as a character device, for applications
4765          * to access it for ioctls.
4766          * First argument (major) to register_chrdev implies a dynamic
4767          * major number allocation.
4768          */
4769         major = register_chrdev(0, "megadev_legacy", &megadev_fops);
4770         if (!major) {
4771                 printk(KERN_WARNING
4772                                 "megaraid: failed to register char device\n");
4773         }
4774
4775         return 0;
4776 }
4777
4778 static void __exit megaraid_exit(void)
4779 {
4780         /*
4781          * Unregister the character device interface to the driver.
4782          */
4783         unregister_chrdev(major, "megadev_legacy");
4784
4785         pci_unregister_driver(&megaraid_pci_driver);
4786
4787 #ifdef CONFIG_PROC_FS
4788         remove_proc_entry("megaraid", NULL);
4789 #endif
4790 }
4791
4792 module_init(megaraid_init);
4793 module_exit(megaraid_exit);
4794
4795 /* vi: set ts=8 sw=8 tw=78: */