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