drivers/scsi/aacraid/rx.c

   1 /*
   2  *      Adaptec AAC series RAID controller driver
   3  *      (c) Copyright 2001 Red Hat Inc. <alan@redhat.com>
   4  *
   5  * based on the old aacraid driver that is..
   6  * Adaptec aacraid device driver for Linux.
   7  *
   8  * Copyright (c) 2000 Adaptec, Inc. (aacraid@adaptec.com)
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2, or (at your option)
  13  * any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; see the file COPYING.  If not, write to
  22  * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
  23  *
  24  * Module Name:
  25  *  rx.c
  26  *
  27  * Abstract: Hardware miniport for Drawbridge specific hardware functions.
  28  *
  29  */
  30
  31 #include <linux/kernel.h>
  32 #include <linux/init.h>
  33 #include <linux/types.h>
  34 #include <linux/sched.h>
  35 #include <linux/pci.h>
  36 #include <linux/spinlock.h>
  37 #include <linux/slab.h>
  38 #include <linux/blkdev.h>
  39 #include <linux/delay.h>
  40 #include <linux/completion.h>
  41 #include <linux/time.h>
  42 #include <linux/interrupt.h>
  43 #include <asm/semaphore.h>
  44
  45 #include <scsi/scsi_host.h>
  46
  47 #include "aacraid.h"
  48
  49 static irqreturn_t aac_rx_intr_producer(int irq, void *dev_id)
  50 {
  51         struct aac_dev *dev = dev_id;
  52         unsigned long bellbits;
  53         u8 intstat = rx_readb(dev, MUnit.OISR);
  54
  55         /*
  56          *      Read mask and invert because drawbridge is reversed.
  57          *      This allows us to only service interrupts that have
  58          *      been enabled.
  59          *      Check to see if this is our interrupt.  If it isn't just return
  60          */
  61         if (intstat & ~(dev->OIMR)) {
  62                 bellbits = rx_readl(dev, OutboundDoorbellReg);
  63                 if (bellbits & DoorBellPrintfReady) {
  64                         aac_printf(dev, readl (&dev->IndexRegs->Mailbox[5]));
  65                         rx_writel(dev, MUnit.ODR,DoorBellPrintfReady);
  66                         rx_writel(dev, InboundDoorbellReg,DoorBellPrintfDone);
  67                 }
  68                 else if (bellbits & DoorBellAdapterNormCmdReady) {
  69                         rx_writel(dev, MUnit.ODR, DoorBellAdapterNormCmdReady);
  70                         aac_command_normal(&dev->queues->queue[HostNormCmdQueue]);
  71                 }
  72                 else if (bellbits & DoorBellAdapterNormRespReady) {
  73                         rx_writel(dev, MUnit.ODR,DoorBellAdapterNormRespReady);
  74                         aac_response_normal(&dev->queues->queue[HostNormRespQueue]);
  75                 }
  76                 else if (bellbits & DoorBellAdapterNormCmdNotFull) {
  77                         rx_writel(dev, MUnit.ODR, DoorBellAdapterNormCmdNotFull);
  78                 }
  79                 else if (bellbits & DoorBellAdapterNormRespNotFull) {
  80                         rx_writel(dev, MUnit.ODR, DoorBellAdapterNormCmdNotFull);
  81                         rx_writel(dev, MUnit.ODR, DoorBellAdapterNormRespNotFull);
  82                 }
  83                 return IRQ_HANDLED;
  84         }
  85         return IRQ_NONE;
  86 }
  87
  88 static irqreturn_t aac_rx_intr_message(int irq, void *dev_id)
  89 {
  90         struct aac_dev *dev = dev_id;
  91         u32 Index = rx_readl(dev, MUnit.OutboundQueue);
  92         if (Index == 0xFFFFFFFFL)
  93                 Index = rx_readl(dev, MUnit.OutboundQueue);
  94         if (Index != 0xFFFFFFFFL) {
  95                 do {
  96                         if (aac_intr_normal(dev, Index)) {
  97                                 rx_writel(dev, MUnit.OutboundQueue, Index);
  98                                 rx_writel(dev, MUnit.ODR, DoorBellAdapterNormRespReady);
  99                         }
 100                         Index = rx_readl(dev, MUnit.OutboundQueue);
 101                 } while (Index != 0xFFFFFFFFL);
 102                 return IRQ_HANDLED;
 103         }
 104         return IRQ_NONE;
 105 }
 106
 107 /**
 108  *      aac_rx_disable_interrupt        -       Disable interrupts
 109  *      @dev: Adapter
 110  */
 111
 112 static void aac_rx_disable_interrupt(struct aac_dev *dev)
 113 {
 114         rx_writeb(dev, MUnit.OIMR, dev->OIMR = 0xff);
 115 }
 116
 117 /**
 118  *      aac_rx_enable_interrupt_producer        -       Enable interrupts
 119  *      @dev: Adapter
 120  */
 121
 122 static void aac_rx_enable_interrupt_producer(struct aac_dev *dev)
 123 {
 124         rx_writeb(dev, MUnit.OIMR, dev->OIMR = 0xfb);
 125 }
 126
 127 /**
 128  *      aac_rx_enable_interrupt_message -       Enable interrupts
 129  *      @dev: Adapter
 130  */
 131
 132 static void aac_rx_enable_interrupt_message(struct aac_dev *dev)
 133 {
 134         rx_writeb(dev, MUnit.OIMR, dev->OIMR = 0xf7);
 135 }
 136
 137 /**
 138  *      rx_sync_cmd     -       send a command and wait
 139  *      @dev: Adapter
 140  *      @command: Command to execute
 141  *      @p1: first parameter
 142  *      @ret: adapter status
 143  *
 144  *      This routine will send a synchronous command to the adapter and wait
 145  *      for its completion.
 146  */
 147
 148 static int rx_sync_cmd(struct aac_dev *dev, u32 command,
 149         u32 p1, u32 p2, u32 p3, u32 p4, u32 p5, u32 p6,
 150         u32 *status, u32 * r1, u32 * r2, u32 * r3, u32 * r4)
 151 {
 152         unsigned long start;
 153         int ok;
 154         /*
 155          *      Write the command into Mailbox 0
 156          */
 157         writel(command, &dev->IndexRegs->Mailbox[0]);
 158         /*
 159          *      Write the parameters into Mailboxes 1 - 6
 160          */
 161         writel(p1, &dev->IndexRegs->Mailbox[1]);
 162         writel(p2, &dev->IndexRegs->Mailbox[2]);
 163         writel(p3, &dev->IndexRegs->Mailbox[3]);
 164         writel(p4, &dev->IndexRegs->Mailbox[4]);
 165         /*
 166          *      Clear the synch command doorbell to start on a clean slate.
 167          */
 168         rx_writel(dev, OutboundDoorbellReg, OUTBOUNDDOORBELL_0);
 169         /*
 170          *      Disable doorbell interrupts
 171          */
 172         rx_writeb(dev, MUnit.OIMR, dev->OIMR = 0xff);
 173         /*
 174          *      Force the completion of the mask register write before issuing
 175          *      the interrupt.
 176          */
 177         rx_readb (dev, MUnit.OIMR);
 178         /*
 179          *      Signal that there is a new synch command
 180          */
 181         rx_writel(dev, InboundDoorbellReg, INBOUNDDOORBELL_0);
 182
 183         ok = 0;
 184         start = jiffies;
 185
 186         /*
 187          *      Wait up to 30 seconds
 188          */
 189         while (time_before(jiffies, start+30*HZ))
 190         {
 191                 udelay(5);      /* Delay 5 microseconds to let Mon960 get info. */
 192                 /*
 193                  *      Mon960 will set doorbell0 bit when it has completed the command.
 194                  */
 195                 if (rx_readl(dev, OutboundDoorbellReg) & OUTBOUNDDOORBELL_0) {
 196                         /*
 197                          *      Clear the doorbell.
 198                          */
 199                         rx_writel(dev, OutboundDoorbellReg, OUTBOUNDDOORBELL_0);
 200                         ok = 1;
 201                         break;
 202                 }
 203                 /*
 204                  *      Yield the processor in case we are slow
 205                  */
 206                 msleep(1);
 207         }
 208         if (ok != 1) {
 209                 /*
 210                  *      Restore interrupt mask even though we timed out
 211                  */
 212                 aac_adapter_enable_int(dev);
 213                 return -ETIMEDOUT;
 214         }
 215         /*
 216          *      Pull the synch status from Mailbox 0.
 217          */
 218         if (status)
 219                 *status = readl(&dev->IndexRegs->Mailbox[0]);
 220         if (r1)
 221                 *r1 = readl(&dev->IndexRegs->Mailbox[1]);
 222         if (r2)
 223                 *r2 = readl(&dev->IndexRegs->Mailbox[2]);
 224         if (r3)
 225                 *r3 = readl(&dev->IndexRegs->Mailbox[3]);
 226         if (r4)
 227                 *r4 = readl(&dev->IndexRegs->Mailbox[4]);
 228         /*
 229          *      Clear the synch command doorbell.
 230          */
 231         rx_writel(dev, OutboundDoorbellReg, OUTBOUNDDOORBELL_0);
 232         /*
 233          *      Restore interrupt mask
 234          */
 235         aac_adapter_enable_int(dev);
 236         return 0;
 237
 238 }
 239
 240 /**
 241  *      aac_rx_interrupt_adapter        -       interrupt adapter
 242  *      @dev: Adapter
 243  *
 244  *      Send an interrupt to the i960 and breakpoint it.
 245  */
 246
 247 static void aac_rx_interrupt_adapter(struct aac_dev *dev)
 248 {
 249         rx_sync_cmd(dev, BREAKPOINT_REQUEST, 0, 0, 0, 0, 0, 0, NULL, NULL, NULL, NULL, NULL);
 250 }
 251
 252 /**
 253  *      aac_rx_notify_adapter           -       send an event to the adapter
 254  *      @dev: Adapter
 255  *      @event: Event to send
 256  *
 257  *      Notify the i960 that something it probably cares about has
 258  *      happened.
 259  */
 260
 261 static void aac_rx_notify_adapter(struct aac_dev *dev, u32 event)
 262 {
 263         switch (event) {
 264
 265         case AdapNormCmdQue:
 266                 rx_writel(dev, MUnit.IDR,INBOUNDDOORBELL_1);
 267                 break;
 268         case HostNormRespNotFull:
 269                 rx_writel(dev, MUnit.IDR,INBOUNDDOORBELL_4);
 270                 break;
 271         case AdapNormRespQue:
 272                 rx_writel(dev, MUnit.IDR,INBOUNDDOORBELL_2);
 273                 break;
 274         case HostNormCmdNotFull:
 275                 rx_writel(dev, MUnit.IDR,INBOUNDDOORBELL_3);
 276                 break;
 277         case HostShutdown:
 278                 break;
 279         case FastIo:
 280                 rx_writel(dev, MUnit.IDR,INBOUNDDOORBELL_6);
 281                 break;
 282         case AdapPrintfDone:
 283                 rx_writel(dev, MUnit.IDR,INBOUNDDOORBELL_5);
 284                 break;
 285         default:
 286                 BUG();
 287                 break;
 288         }
 289 }
 290
 291 /**
 292  *      aac_rx_start_adapter            -       activate adapter
 293  *      @dev:   Adapter
 294  *
 295  *      Start up processing on an i960 based AAC adapter
 296  */
 297
 298 void aac_rx_start_adapter(struct aac_dev *dev)
 299 {
 300         struct aac_init *init;
 301
 302         init = dev->init;
 303         init->HostElapsedSeconds = cpu_to_le32(get_seconds());
 304         // We can only use a 32 bit address here
 305         rx_sync_cmd(dev, INIT_STRUCT_BASE_ADDRESS, (u32)(ulong)dev->init_pa,
 306           0, 0, 0, 0, 0, NULL, NULL, NULL, NULL, NULL);
 307 }
 308
 309 /**
 310  *      aac_rx_check_health
 311  *      @dev: device to check if healthy
 312  *
 313  *      Will attempt to determine if the specified adapter is alive and
 314  *      capable of handling requests, returning 0 if alive.
 315  */
 316 static int aac_rx_check_health(struct aac_dev *dev)
 317 {
 318         u32 status = rx_readl(dev, MUnit.OMRx[0]);
 319
 320         /*
 321          *      Check to see if the board failed any self tests.
 322          */
 323         if (status & SELF_TEST_FAILED)
 324                 return -1;
 325         /*
 326          *      Check to see if the board panic'd.
 327          */
 328         if (status & KERNEL_PANIC) {
 329                 char * buffer;
 330                 struct POSTSTATUS {
 331                         __le32 Post_Command;
 332                         __le32 Post_Address;
 333                 } * post;
 334                 dma_addr_t paddr, baddr;
 335                 int ret;
 336
 337                 if ((status & 0xFF000000L) == 0xBC000000L)
 338                         return (status >> 16) & 0xFF;
 339                 buffer = pci_alloc_consistent(dev->pdev, 512, &baddr);
 340                 ret = -2;
 341                 if (buffer == NULL)
 342                         return ret;
 343                 post = pci_alloc_consistent(dev->pdev,
 344                   sizeof(struct POSTSTATUS), &paddr);
 345                 if (post == NULL) {
 346                         pci_free_consistent(dev->pdev, 512, buffer, baddr);
 347                         return ret;
 348                 }
 349                 memset(buffer, 0, 512);
 350                 post->Post_Command = cpu_to_le32(COMMAND_POST_RESULTS);
 351                 post->Post_Address = cpu_to_le32(baddr);
 352                 rx_writel(dev, MUnit.IMRx[0], paddr);
 353                 rx_sync_cmd(dev, COMMAND_POST_RESULTS, baddr, 0, 0, 0, 0, 0,
 354                   NULL, NULL, NULL, NULL, NULL);
 355                 pci_free_consistent(dev->pdev, sizeof(struct POSTSTATUS),
 356                   post, paddr);
 357                 if ((buffer[0] == '0') && ((buffer[1] == 'x') || (buffer[1] == 'X'))) {
 358                         ret = (buffer[2] <= '9') ? (buffer[2] - '0') : (buffer[2] - 'A' + 10);
 359                         ret <<= 4;
 360                         ret += (buffer[3] <= '9') ? (buffer[3] - '0') : (buffer[3] - 'A' + 10);
 361                 }
 362                 pci_free_consistent(dev->pdev, 512, buffer, baddr);
 363                 return ret;
 364         }
 365         /*
 366          *      Wait for the adapter to be up and running.
 367          */
 368         if (!(status & KERNEL_UP_AND_RUNNING))
 369                 return -3;
 370         /*
 371          *      Everything is OK
 372          */
 373         return 0;
 374 }
 375
 376 /**
 377  *      aac_rx_deliver_producer
 378  *      @fib: fib to issue
 379  *
 380  *      Will send a fib, returning 0 if successful.
 381  */
 382 static int aac_rx_deliver_producer(struct fib * fib)
 383 {
 384         struct aac_dev *dev = fib->dev;
 385         struct aac_queue *q = &dev->queues->queue[AdapNormCmdQueue];
 386         unsigned long qflags;
 387         u32 Index;
 388         unsigned long nointr = 0;
 389
 390         spin_lock_irqsave(q->lock, qflags);
 391         aac_queue_get( dev, &Index, AdapNormCmdQueue, fib->hw_fib, 1, fib, &nointr);
 392
 393         q->numpending++;
 394         *(q->headers.producer) = cpu_to_le32(Index + 1);
 395         spin_unlock_irqrestore(q->lock, qflags);
 396         if (!(nointr & aac_config.irq_mod))
 397                 aac_adapter_notify(dev, AdapNormCmdQueue);
 398
 399         return 0;
 400 }
 401
 402 /**
 403  *      aac_rx_deliver_message
 404  *      @fib: fib to issue
 405  *
 406  *      Will send a fib, returning 0 if successful.
 407  */
 408 static int aac_rx_deliver_message(struct fib * fib)
 409 {
 410         struct aac_dev *dev = fib->dev;
 411         struct aac_queue *q = &dev->queues->queue[AdapNormCmdQueue];
 412         unsigned long qflags;
 413         u32 Index;
 414         u64 addr;
 415         volatile void __iomem *device;
 416
 417         unsigned long count = 10000000L; /* 50 seconds */
 418         spin_lock_irqsave(q->lock, qflags);
 419         q->numpending++;
 420         spin_unlock_irqrestore(q->lock, qflags);
 421         for(;;) {
 422                 Index = rx_readl(dev, MUnit.InboundQueue);
 423                 if (Index == 0xFFFFFFFFL)
 424                         Index = rx_readl(dev, MUnit.InboundQueue);
 425                 if (Index != 0xFFFFFFFFL)
 426                         break;
 427                 if (--count == 0) {
 428                         spin_lock_irqsave(q->lock, qflags);
 429                         q->numpending--;
 430                         spin_unlock_irqrestore(q->lock, qflags);
 431                         return -ETIMEDOUT;
 432                 }
 433                 udelay(5);
 434         }
 435         device = dev->base + Index;
 436         addr = fib->hw_fib_pa;
 437         writel((u32)(addr & 0xffffffff), device);
 438         device += sizeof(u32);
 439         writel((u32)(addr >> 32), device);
 440         device += sizeof(u32);
 441         writel(le16_to_cpu(fib->hw_fib->header.Size), device);
 442         rx_writel(dev, MUnit.InboundQueue, Index);
 443         return 0;
 444 }
 445
 446 /**
 447  *      aac_rx_ioremap
 448  *      @size: mapping resize request
 449  *
 450  */
 451 static int aac_rx_ioremap(struct aac_dev * dev, u32 size)
 452 {
 453         if (!size) {
 454                 iounmap(dev->regs.rx);
 455                 return 0;
 456         }
 457         dev->base = dev->regs.rx = ioremap(dev->scsi_host_ptr->base, size);
 458         if (dev->base == NULL)
 459                 return -1;
 460         dev->IndexRegs = &dev->regs.rx->IndexRegs;
 461         return 0;
 462 }
 463
 464 static int aac_rx_restart_adapter(struct aac_dev *dev)
 465 {
 466         u32 var;
 467
 468         printk(KERN_ERR "%s%d: adapter kernel panic'd.\n",
 469                         dev->name, dev->id);
 470
 471         if (aac_rx_check_health(dev) <= 0)
 472                 return 1;
 473         if (rx_sync_cmd(dev, IOP_RESET, 0, 0, 0, 0, 0, 0,
 474                         &var, NULL, NULL, NULL, NULL))
 475                 return 1;
 476         if (var != 0x00000001)
 477                  return 1;
 478         if (rx_readl(dev, MUnit.OMRx[0]) & KERNEL_PANIC)
 479                 return 1;
 480         return 0;
 481 }
 482
 483 /**
 484  *      aac_rx_select_comm      -       Select communications method
 485  *      @dev: Adapter
 486  *      @comm: communications method
 487  */
 488
 489 int aac_rx_select_comm(struct aac_dev *dev, int comm)
 490 {
 491         switch (comm) {
 492         case AAC_COMM_PRODUCER:
 493                 dev->a_ops.adapter_enable_int = aac_rx_enable_interrupt_producer;
 494                 dev->a_ops.adapter_intr = aac_rx_intr_producer;
 495                 dev->a_ops.adapter_deliver = aac_rx_deliver_producer;
 496                 break;
 497         case AAC_COMM_MESSAGE:
 498                 dev->a_ops.adapter_enable_int = aac_rx_enable_interrupt_message;
 499                 dev->a_ops.adapter_intr = aac_rx_intr_message;
 500                 dev->a_ops.adapter_deliver = aac_rx_deliver_message;
 501                 break;
 502         default:
 503                 return 1;
 504         }
 505         return 0;
 506 }
 507
 508 /**
 509  *      aac_rx_init     -       initialize an i960 based AAC card
 510  *      @dev: device to configure
 511  *
 512  *      Allocate and set up resources for the i960 based AAC variants. The
 513  *      device_interface in the commregion will be allocated and linked
 514  *      to the comm region.
 515  */
 516
 517 int _aac_rx_init(struct aac_dev *dev)
 518 {
 519         unsigned long start;
 520         unsigned long status;
 521         int instance;
 522         const char * name;
 523
 524         instance = dev->id;
 525         name     = dev->name;
 526
 527         if (aac_adapter_ioremap(dev, dev->base_size)) {
 528                 printk(KERN_WARNING "%s: unable to map adapter.\n", name);
 529                 goto error_iounmap;
 530         }
 531
 532         /*
 533          *      Check to see if the board panic'd while booting.
 534          */
 535         status = rx_readl(dev, MUnit.OMRx[0]);
 536         if (status & KERNEL_PANIC)
 537                 if (aac_rx_restart_adapter(dev))
 538                         goto error_iounmap;
 539         /*
 540          *      Check to see if the board failed any self tests.
 541          */
 542         status = rx_readl(dev, MUnit.OMRx[0]);
 543         if (status & SELF_TEST_FAILED) {
 544                 printk(KERN_ERR "%s%d: adapter self-test failed.\n", dev->name, instance);
 545                 goto error_iounmap;
 546         }
 547         /*
 548          *      Check to see if the monitor panic'd while booting.
 549          */
 550         if (status & MONITOR_PANIC) {
 551                 printk(KERN_ERR "%s%d: adapter monitor panic.\n", dev->name, instance);
 552                 goto error_iounmap;
 553         }
 554         start = jiffies;
 555         /*
 556          *      Wait for the adapter to be up and running. Wait up to 3 minutes
 557          */
 558         while (!((status = rx_readl(dev, MUnit.OMRx[0])) & KERNEL_UP_AND_RUNNING))
 559         {
 560                 if(time_after(jiffies, start+startup_timeout*HZ))
 561                 {
 562                         printk(KERN_ERR "%s%d: adapter kernel failed to start, init status = %lx.\n",
 563                                         dev->name, instance, status);
 564                         goto error_iounmap;
 565                 }
 566                 msleep(1);
 567         }
 568         /*
 569          *      Fill in the common function dispatch table.
 570          */
 571         dev->a_ops.adapter_interrupt = aac_rx_interrupt_adapter;
 572         dev->a_ops.adapter_disable_int = aac_rx_disable_interrupt;
 573         dev->a_ops.adapter_notify = aac_rx_notify_adapter;
 574         dev->a_ops.adapter_sync_cmd = rx_sync_cmd;
 575         dev->a_ops.adapter_check_health = aac_rx_check_health;
 576
 577         /*
 578          *      First clear out all interrupts.  Then enable the one's that we
 579          *      can handle.
 580          */
 581         aac_adapter_comm(dev, AAC_COMM_PRODUCER);
 582         aac_adapter_disable_int(dev);
 583         rx_writel(dev, MUnit.ODR, 0xffffffff);
 584         aac_adapter_enable_int(dev);
 585
 586         if (aac_init_adapter(dev) == NULL)
 587                 goto error_iounmap;
 588         aac_adapter_comm(dev, dev->comm_interface);
 589         if (request_irq(dev->scsi_host_ptr->irq, dev->a_ops.adapter_intr,
 590                         IRQF_SHARED|IRQF_DISABLED, "aacraid", dev) < 0) {
 591                 printk(KERN_ERR "%s%d: Interrupt unavailable.\n",
 592                         name, instance);
 593                 goto error_iounmap;
 594         }
 595         aac_adapter_enable_int(dev);
 596         /*
 597          *      Tell the adapter that all is configured, and it can
 598          * start accepting requests
 599          */
 600         aac_rx_start_adapter(dev);
 601
 602         return 0;
 603
 604 error_iounmap:
 605
 606         return -1;
 607 }
 608
 609 int aac_rx_init(struct aac_dev *dev)
 610 {
 611         /*
 612          *      Fill in the function dispatch table.
 613          */
 614         dev->a_ops.adapter_ioremap = aac_rx_ioremap;
 615         dev->a_ops.adapter_comm = aac_rx_select_comm;
 616
 617         return _aac_rx_init(dev);
 618 }