drivers/scsi/aacraid/rkt.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  *  rkt.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_rkt_intr(int irq, void *dev_id, struct pt_regs *regs)
  50 {
  51         struct aac_dev *dev = dev_id;
  52
  53         if (dev->new_comm_interface) {
  54                 u32 Index = rkt_readl(dev, MUnit.OutboundQueue);
  55                 if (Index == 0xFFFFFFFFL)
  56                         Index = rkt_readl(dev, MUnit.OutboundQueue);
  57                 if (Index != 0xFFFFFFFFL) {
  58                         do {
  59                                 if (aac_intr_normal(dev, Index)) {
  60                                         rkt_writel(dev, MUnit.OutboundQueue, Index);
  61                                         rkt_writel(dev, MUnit.ODR, DoorBellAdapterNormRespReady);
  62                                 }
  63                                 Index = rkt_readl(dev, MUnit.OutboundQueue);
  64                         } while (Index != 0xFFFFFFFFL);
  65                         return IRQ_HANDLED;
  66                 }
  67         } else {
  68                 unsigned long bellbits;
  69                 u8 intstat;
  70                 intstat = rkt_readb(dev, MUnit.OISR);
  71                 /*
  72                  *      Read mask and invert because drawbridge is reversed.
  73                  *      This allows us to only service interrupts that have
  74                  *      been enabled.
  75                  *      Check to see if this is our interrupt.  If it isn't just return
  76                  */
  77                 if (intstat & ~(dev->OIMR))
  78                 {
  79                         bellbits = rkt_readl(dev, OutboundDoorbellReg);
  80                         if (bellbits & DoorBellPrintfReady) {
  81                                 aac_printf(dev, rkt_readl (dev, IndexRegs.Mailbox[5]));
  82                                 rkt_writel(dev, MUnit.ODR,DoorBellPrintfReady);
  83                                 rkt_writel(dev, InboundDoorbellReg,DoorBellPrintfDone);
  84                         }
  85                         else if (bellbits & DoorBellAdapterNormCmdReady) {
  86                                 rkt_writel(dev, MUnit.ODR, DoorBellAdapterNormCmdReady);
  87                                 aac_command_normal(&dev->queues->queue[HostNormCmdQueue]);
  88 //                              rkt_writel(dev, MUnit.ODR, DoorBellAdapterNormCmdReady);
  89                         }
  90                         else if (bellbits & DoorBellAdapterNormRespReady) {
  91                                 rkt_writel(dev, MUnit.ODR,DoorBellAdapterNormRespReady);
  92                                 aac_response_normal(&dev->queues->queue[HostNormRespQueue]);
  93                         }
  94                         else if (bellbits & DoorBellAdapterNormCmdNotFull) {
  95                                 rkt_writel(dev, MUnit.ODR, DoorBellAdapterNormCmdNotFull);
  96                         }
  97                         else if (bellbits & DoorBellAdapterNormRespNotFull) {
  98                                 rkt_writel(dev, MUnit.ODR, DoorBellAdapterNormCmdNotFull);
  99                                 rkt_writel(dev, MUnit.ODR, DoorBellAdapterNormRespNotFull);
 100                         }
 101                         return IRQ_HANDLED;
 102                 }
 103         }
 104         return IRQ_NONE;
 105 }
 106
 107 /**
 108  *      aac_rkt_disable_interrupt       -       Disable interrupts
 109  *      @dev: Adapter
 110  */
 111
 112 static void aac_rkt_disable_interrupt(struct aac_dev *dev)
 113 {
 114         rkt_writeb(dev, MUnit.OIMR, dev->OIMR = 0xff);
 115 }
 116
 117 /**
 118  *      rkt_sync_cmd    -       send a command and wait
 119  *      @dev: Adapter
 120  *      @command: Command to execute
 121  *      @p1: first parameter
 122  *      @ret: adapter status
 123  *
 124  *      This routine will send a synchronous command to the adapter and wait
 125  *      for its completion.
 126  */
 127
 128 static int rkt_sync_cmd(struct aac_dev *dev, u32 command,
 129         u32 p1, u32 p2, u32 p3, u32 p4, u32 p5, u32 p6,
 130         u32 *status, u32 *r1, u32 *r2, u32 *r3, u32 *r4)
 131 {
 132         unsigned long start;
 133         int ok;
 134         /*
 135          *      Write the command into Mailbox 0
 136          */
 137         rkt_writel(dev, InboundMailbox0, command);
 138         /*
 139          *      Write the parameters into Mailboxes 1 - 6
 140          */
 141         rkt_writel(dev, InboundMailbox1, p1);
 142         rkt_writel(dev, InboundMailbox2, p2);
 143         rkt_writel(dev, InboundMailbox3, p3);
 144         rkt_writel(dev, InboundMailbox4, p4);
 145         /*
 146          *      Clear the synch command doorbell to start on a clean slate.
 147          */
 148         rkt_writel(dev, OutboundDoorbellReg, OUTBOUNDDOORBELL_0);
 149         /*
 150          *      Disable doorbell interrupts
 151          */
 152         rkt_writeb(dev, MUnit.OIMR, dev->OIMR = 0xff);
 153         /*
 154          *      Force the completion of the mask register write before issuing
 155          *      the interrupt.
 156          */
 157         rkt_readb (dev, MUnit.OIMR);
 158         /*
 159          *      Signal that there is a new synch command
 160          */
 161         rkt_writel(dev, InboundDoorbellReg, INBOUNDDOORBELL_0);
 162
 163         ok = 0;
 164         start = jiffies;
 165
 166         /*
 167          *      Wait up to 30 seconds
 168          */
 169         while (time_before(jiffies, start+30*HZ))
 170         {
 171                 udelay(5);      /* Delay 5 microseconds to let Mon960 get info. */
 172                 /*
 173                  *      Mon960 will set doorbell0 bit when it has completed the command.
 174                  */
 175                 if (rkt_readl(dev, OutboundDoorbellReg) & OUTBOUNDDOORBELL_0) {
 176                         /*
 177                          *      Clear the doorbell.
 178                          */
 179                         rkt_writel(dev, OutboundDoorbellReg, OUTBOUNDDOORBELL_0);
 180                         ok = 1;
 181                         break;
 182                 }
 183                 /*
 184                  *      Yield the processor in case we are slow
 185                  */
 186                 msleep(1);
 187         }
 188         if (ok != 1) {
 189                 /*
 190                  *      Restore interrupt mask even though we timed out
 191                  */
 192                 if (dev->new_comm_interface)
 193                         rkt_writeb(dev, MUnit.OIMR, dev->OIMR = 0xf7);
 194                 else
 195                         rkt_writeb(dev, MUnit.OIMR, dev->OIMR = 0xfb);
 196                 return -ETIMEDOUT;
 197         }
 198         /*
 199          *      Pull the synch status from Mailbox 0.
 200          */
 201         if (status)
 202                 *status = rkt_readl(dev, IndexRegs.Mailbox[0]);
 203         if (r1)
 204                 *r1 = rkt_readl(dev, IndexRegs.Mailbox[1]);
 205         if (r2)
 206                 *r2 = rkt_readl(dev, IndexRegs.Mailbox[2]);
 207         if (r3)
 208                 *r3 = rkt_readl(dev, IndexRegs.Mailbox[3]);
 209         if (r4)
 210                 *r4 = rkt_readl(dev, IndexRegs.Mailbox[4]);
 211         /*
 212          *      Clear the synch command doorbell.
 213          */
 214         rkt_writel(dev, OutboundDoorbellReg, OUTBOUNDDOORBELL_0);
 215         /*
 216          *      Restore interrupt mask
 217          */
 218         if (dev->new_comm_interface)
 219                 rkt_writeb(dev, MUnit.OIMR, dev->OIMR = 0xf7);
 220         else
 221                 rkt_writeb(dev, MUnit.OIMR, dev->OIMR = 0xfb);
 222         return 0;
 223
 224 }
 225
 226 /**
 227  *      aac_rkt_interrupt_adapter       -       interrupt adapter
 228  *      @dev: Adapter
 229  *
 230  *      Send an interrupt to the i960 and breakpoint it.
 231  */
 232
 233 static void aac_rkt_interrupt_adapter(struct aac_dev *dev)
 234 {
 235         rkt_sync_cmd(dev, BREAKPOINT_REQUEST, 0, 0, 0, 0, 0, 0,
 236           NULL, NULL, NULL, NULL, NULL);
 237 }
 238
 239 /**
 240  *      aac_rkt_notify_adapter          -       send an event to the adapter
 241  *      @dev: Adapter
 242  *      @event: Event to send
 243  *
 244  *      Notify the i960 that something it probably cares about has
 245  *      happened.
 246  */
 247
 248 static void aac_rkt_notify_adapter(struct aac_dev *dev, u32 event)
 249 {
 250         switch (event) {
 251
 252         case AdapNormCmdQue:
 253                 rkt_writel(dev, MUnit.IDR,INBOUNDDOORBELL_1);
 254                 break;
 255         case HostNormRespNotFull:
 256                 rkt_writel(dev, MUnit.IDR,INBOUNDDOORBELL_4);
 257                 break;
 258         case AdapNormRespQue:
 259                 rkt_writel(dev, MUnit.IDR,INBOUNDDOORBELL_2);
 260                 break;
 261         case HostNormCmdNotFull:
 262                 rkt_writel(dev, MUnit.IDR,INBOUNDDOORBELL_3);
 263                 break;
 264         case HostShutdown:
 265 //              rkt_sync_cmd(dev, HOST_CRASHING, 0, 0, 0, 0, 0, 0,
 266 //                NULL, NULL, NULL, NULL, NULL);
 267                 break;
 268         case FastIo:
 269                 rkt_writel(dev, MUnit.IDR,INBOUNDDOORBELL_6);
 270                 break;
 271         case AdapPrintfDone:
 272                 rkt_writel(dev, MUnit.IDR,INBOUNDDOORBELL_5);
 273                 break;
 274         default:
 275                 BUG();
 276                 break;
 277         }
 278 }
 279
 280 /**
 281  *      aac_rkt_start_adapter           -       activate adapter
 282  *      @dev:   Adapter
 283  *
 284  *      Start up processing on an i960 based AAC adapter
 285  */
 286
 287 static void aac_rkt_start_adapter(struct aac_dev *dev)
 288 {
 289         struct aac_init *init;
 290
 291         init = dev->init;
 292         init->HostElapsedSeconds = cpu_to_le32(get_seconds());
 293         // We can only use a 32 bit address here
 294         rkt_sync_cmd(dev, INIT_STRUCT_BASE_ADDRESS, (u32)(ulong)dev->init_pa,
 295           0, 0, 0, 0, 0, NULL, NULL, NULL, NULL, NULL);
 296 }
 297
 298 /**
 299  *      aac_rkt_check_health
 300  *      @dev: device to check if healthy
 301  *
 302  *      Will attempt to determine if the specified adapter is alive and
 303  *      capable of handling requests, returning 0 if alive.
 304  */
 305 static int aac_rkt_check_health(struct aac_dev *dev)
 306 {
 307         u32 status = rkt_readl(dev, MUnit.OMRx[0]);
 308
 309         /*
 310          *      Check to see if the board failed any self tests.
 311          */
 312         if (status & SELF_TEST_FAILED)
 313                 return -1;
 314         /*
 315          *      Check to see if the board panic'd.
 316          */
 317         if (status & KERNEL_PANIC) {
 318                 char * buffer;
 319                 struct POSTSTATUS {
 320                         __le32 Post_Command;
 321                         __le32 Post_Address;
 322                 } * post;
 323                 dma_addr_t paddr, baddr;
 324                 int ret;
 325
 326                 if ((status & 0xFF000000L) == 0xBC000000L)
 327                         return (status >> 16) & 0xFF;
 328                 buffer = pci_alloc_consistent(dev->pdev, 512, &baddr);
 329                 ret = -2;
 330                 if (buffer == NULL)
 331                         return ret;
 332                 post = pci_alloc_consistent(dev->pdev,
 333                   sizeof(struct POSTSTATUS), &paddr);
 334                 if (post == NULL) {
 335                         pci_free_consistent(dev->pdev, 512, buffer, baddr);
 336                         return ret;
 337                 }
 338                 memset(buffer, 0, 512);
 339                 post->Post_Command = cpu_to_le32(COMMAND_POST_RESULTS);
 340                 post->Post_Address = cpu_to_le32(baddr);
 341                 rkt_writel(dev, MUnit.IMRx[0], paddr);
 342                 rkt_sync_cmd(dev, COMMAND_POST_RESULTS, baddr, 0, 0, 0, 0, 0,
 343                   NULL, NULL, NULL, NULL, NULL);
 344                 pci_free_consistent(dev->pdev, sizeof(struct POSTSTATUS),
 345                   post, paddr);
 346                 if ((buffer[0] == '0') && ((buffer[1] == 'x') || (buffer[1] == 'X'))) {
 347                         ret = (buffer[2] <= '9') ? (buffer[2] - '0') : (buffer[2] - 'A' + 10);
 348                         ret <<= 4;
 349                         ret += (buffer[3] <= '9') ? (buffer[3] - '0') : (buffer[3] - 'A' + 10);
 350                 }
 351                 pci_free_consistent(dev->pdev, 512, buffer, baddr);
 352                 return ret;
 353         }
 354         /*
 355          *      Wait for the adapter to be up and running.
 356          */
 357         if (!(status & KERNEL_UP_AND_RUNNING))
 358                 return -3;
 359         /*
 360          *      Everything is OK
 361          */
 362         return 0;
 363 }
 364
 365 /**
 366  *      aac_rkt_send
 367  *      @fib: fib to issue
 368  *
 369  *      Will send a fib, returning 0 if successful.
 370  */
 371 static int aac_rkt_send(struct fib * fib)
 372 {
 373         u64 addr = fib->hw_fib_pa;
 374         struct aac_dev *dev = fib->dev;
 375         volatile void __iomem *device = dev->regs.rkt;
 376         u32 Index;
 377
 378         dprintk((KERN_DEBUG "%p->aac_rkt_send(%p->%llx)\n", dev, fib, addr));
 379         Index = rkt_readl(dev, MUnit.InboundQueue);
 380         if (Index == 0xFFFFFFFFL)
 381                 Index = rkt_readl(dev, MUnit.InboundQueue);
 382         dprintk((KERN_DEBUG "Index = 0x%x\n", Index));
 383         if (Index == 0xFFFFFFFFL)
 384                 return Index;
 385         device += Index;
 386         dprintk((KERN_DEBUG "entry = %x %x %u\n", (u32)(addr & 0xffffffff),
 387           (u32)(addr >> 32), (u32)le16_to_cpu(fib->hw_fib->header.Size)));
 388         writel((u32)(addr & 0xffffffff), device);
 389         device += sizeof(u32);
 390         writel((u32)(addr >> 32), device);
 391         device += sizeof(u32);
 392         writel(le16_to_cpu(fib->hw_fib->header.Size), device);
 393         rkt_writel(dev, MUnit.InboundQueue, Index);
 394         dprintk((KERN_DEBUG "aac_rkt_send - return 0\n"));
 395         return 0;
 396 }
 397
 398 /**
 399  *      aac_rkt_init    -       initialize an i960 based AAC card
 400  *      @dev: device to configure
 401  *
 402  *      Allocate and set up resources for the i960 based AAC variants. The
 403  *      device_interface in the commregion will be allocated and linked
 404  *      to the comm region.
 405  */
 406
 407 int aac_rkt_init(struct aac_dev *dev)
 408 {
 409         unsigned long start;
 410         unsigned long status;
 411         int instance;
 412         const char * name;
 413
 414         instance = dev->id;
 415         name     = dev->name;
 416
 417         /*
 418          *      Check to see if the board panic'd while booting.
 419          */
 420         /*
 421          *      Check to see if the board failed any self tests.
 422          */
 423         if (rkt_readl(dev, MUnit.OMRx[0]) & SELF_TEST_FAILED) {
 424                 printk(KERN_ERR "%s%d: adapter self-test failed.\n", dev->name, instance);
 425                 goto error_iounmap;
 426         }
 427         /*
 428          *      Check to see if the monitor panic'd while booting.
 429          */
 430         if (rkt_readl(dev, MUnit.OMRx[0]) & MONITOR_PANIC) {
 431                 printk(KERN_ERR "%s%d: adapter monitor panic.\n", dev->name, instance);
 432                 goto error_iounmap;
 433         }
 434         /*
 435          *      Check to see if the board panic'd while booting.
 436          */
 437         if (rkt_readl(dev, MUnit.OMRx[0]) & KERNEL_PANIC) {
 438                 printk(KERN_ERR "%s%d: adapter kernel panic'd.\n", dev->name, instance);
 439                 goto error_iounmap;
 440         }
 441         start = jiffies;
 442         /*
 443          *      Wait for the adapter to be up and running. Wait up to 3 minutes
 444          */
 445         while (!(rkt_readl(dev, MUnit.OMRx[0]) & KERNEL_UP_AND_RUNNING))
 446         {
 447                 if(time_after(jiffies, start+180*HZ))
 448                 {
 449                         status = rkt_readl(dev, MUnit.OMRx[0]);
 450                         printk(KERN_ERR "%s%d: adapter kernel failed to start, init status = %lx.\n",
 451                                         dev->name, instance, status);
 452                         goto error_iounmap;
 453                 }
 454                 schedule_timeout_uninterruptible(1);
 455         }
 456         if (request_irq(dev->scsi_host_ptr->irq, aac_rkt_intr, SA_SHIRQ|SA_INTERRUPT, "aacraid", (void *)dev)<0)
 457         {
 458                 printk(KERN_ERR "%s%d: Interrupt unavailable.\n", name, instance);
 459                 goto error_iounmap;
 460         }
 461         /*
 462          *      Fill in the function dispatch table.
 463          */
 464         dev->a_ops.adapter_interrupt = aac_rkt_interrupt_adapter;
 465         dev->a_ops.adapter_disable_int = aac_rkt_disable_interrupt;
 466         dev->a_ops.adapter_notify = aac_rkt_notify_adapter;
 467         dev->a_ops.adapter_sync_cmd = rkt_sync_cmd;
 468         dev->a_ops.adapter_check_health = aac_rkt_check_health;
 469         dev->a_ops.adapter_send = aac_rkt_send;
 470
 471         /*
 472          *      First clear out all interrupts.  Then enable the one's that we
 473          *      can handle.
 474          */
 475         rkt_writeb(dev, MUnit.OIMR, 0xff);
 476         rkt_writel(dev, MUnit.ODR, 0xffffffff);
 477         rkt_writeb(dev, MUnit.OIMR, dev->OIMR = 0xfb);
 478
 479         if (aac_init_adapter(dev) == NULL)
 480                 goto error_irq;
 481         if (dev->new_comm_interface) {
 482                 /*
 483                  * FIB Setup has already been done, but we can minimize the
 484                  * damage by at least ensuring the OS never issues more
 485                  * commands than we can handle. The Rocket adapters currently
 486                  * can only handle 246 commands and 8 AIFs at the same time,
 487                  * and in fact do notify us accordingly if we negotiate the
 488                  * FIB size. The problem that causes us to add this check is
 489                  * to ensure that we do not overdo it with the adapter when a
 490                  * hard coded FIB override is being utilized. This special
 491                  * case warrants this half baked, but convenient, check here.
 492                  */
 493                 if (dev->scsi_host_ptr->can_queue > (246 - AAC_NUM_MGT_FIB)) {
 494                         dev->init->MaxIoCommands = cpu_to_le32(246);
 495                         dev->scsi_host_ptr->can_queue = 246 - AAC_NUM_MGT_FIB;
 496                 }
 497                 rkt_writeb(dev, MUnit.OIMR, dev->OIMR = 0xf7);
 498         }
 499         /*
 500          *      Tell the adapter that all is configured, and it can start
 501          *      accepting requests
 502          */
 503         aac_rkt_start_adapter(dev);
 504         return 0;
 505
 506 error_irq:
 507         rkt_writeb(dev, MUnit.OIMR, dev->OIMR = 0xff);
 508         free_irq(dev->scsi_host_ptr->irq, (void *)dev);
 509
 510 error_iounmap:
 511
 512         return -1;
 513 }