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         unsigned long bellbits;
  53         u8 intstat, mask;
  54         intstat = rkt_readb(dev, MUnit.OISR);
  55         /*
  56          *      Read mask and invert because drawbridge is reversed.
  57          *      This allows us to only service interrupts that have
  58          *      been enabled.
  59          */
  60         mask = ~(dev->OIMR);
  61         /* Check to see if this is our interrupt.  If it isn't just return */
  62         if (intstat & mask)
  63         {
  64                 bellbits = rkt_readl(dev, OutboundDoorbellReg);
  65                 if (bellbits & DoorBellPrintfReady) {
  66                         aac_printf(dev, rkt_readl(dev, IndexRegs.Mailbox[5]));
  67                         rkt_writel(dev, MUnit.ODR,DoorBellPrintfReady);
  68                         rkt_writel(dev, InboundDoorbellReg,DoorBellPrintfDone);
  69                 }
  70                 else if (bellbits & DoorBellAdapterNormCmdReady) {
  71                         rkt_writel(dev, MUnit.ODR, DoorBellAdapterNormCmdReady);
  72                         aac_command_normal(&dev->queues->queue[HostNormCmdQueue]);
  73                 }
  74                 else if (bellbits & DoorBellAdapterNormRespReady) {
  75                         aac_response_normal(&dev->queues->queue[HostNormRespQueue]);
  76                         rkt_writel(dev, MUnit.ODR,DoorBellAdapterNormRespReady);
  77                 }
  78                 else if (bellbits & DoorBellAdapterNormCmdNotFull) {
  79                         rkt_writel(dev, MUnit.ODR, DoorBellAdapterNormCmdNotFull);
  80                 }
  81                 else if (bellbits & DoorBellAdapterNormRespNotFull) {
  82                         rkt_writel(dev, MUnit.ODR, DoorBellAdapterNormCmdNotFull);
  83                         rkt_writel(dev, MUnit.ODR, DoorBellAdapterNormRespNotFull);
  84                 }
  85                 return IRQ_HANDLED;
  86         }
  87         return IRQ_NONE;
  88 }
  89
  90 /**
  91  *      aac_rkt_disable_interrupt       -       Disable interrupts
  92  *      @dev: Adapter
  93  */
  94
  95 static void aac_rkt_disable_interrupt(struct aac_dev *dev)
  96 {
  97         rkt_writeb(dev, MUnit.OIMR, dev->OIMR = 0xff);
  98 }
  99
 100 /**
 101  *      rkt_sync_cmd    -       send a command and wait
 102  *      @dev: Adapter
 103  *      @command: Command to execute
 104  *      @p1: first parameter
 105  *      @ret: adapter status
 106  *
 107  *      This routine will send a synchronous command to the adapter and wait
 108  *      for its completion.
 109  */
 110
 111 static int rkt_sync_cmd(struct aac_dev *dev, u32 command,
 112         u32 p1, u32 p2, u32 p3, u32 p4, u32 p5, u32 p6,
 113         u32 *status, u32 *r1, u32 *r2, u32 *r3, u32 *r4)
 114 {
 115         unsigned long start;
 116         int ok;
 117         /*
 118          *      Write the command into Mailbox 0
 119          */
 120         rkt_writel(dev, InboundMailbox0, command);
 121         /*
 122          *      Write the parameters into Mailboxes 1 - 6
 123          */
 124         rkt_writel(dev, InboundMailbox1, p1);
 125         rkt_writel(dev, InboundMailbox2, p2);
 126         rkt_writel(dev, InboundMailbox3, p3);
 127         rkt_writel(dev, InboundMailbox4, p4);
 128         /*
 129          *      Clear the synch command doorbell to start on a clean slate.
 130          */
 131         rkt_writel(dev, OutboundDoorbellReg, OUTBOUNDDOORBELL_0);
 132         /*
 133          *      Disable doorbell interrupts
 134          */
 135         rkt_writeb(dev, MUnit.OIMR, dev->OIMR = 0xff);
 136         /*
 137          *      Force the completion of the mask register write before issuing
 138          *      the interrupt.
 139          */
 140         rkt_readb (dev, MUnit.OIMR);
 141         /*
 142          *      Signal that there is a new synch command
 143          */
 144         rkt_writel(dev, InboundDoorbellReg, INBOUNDDOORBELL_0);
 145
 146         ok = 0;
 147         start = jiffies;
 148
 149         /*
 150          *      Wait up to 30 seconds
 151          */
 152         while (time_before(jiffies, start+30*HZ))
 153         {
 154                 udelay(5);      /* Delay 5 microseconds to let Mon960 get info. */
 155                 /*
 156                  *      Mon960 will set doorbell0 bit when it has completed the command.
 157                  */
 158                 if (rkt_readl(dev, OutboundDoorbellReg) & OUTBOUNDDOORBELL_0) {
 159                         /*
 160                          *      Clear the doorbell.
 161                          */
 162                         rkt_writel(dev, OutboundDoorbellReg, OUTBOUNDDOORBELL_0);
 163                         ok = 1;
 164                         break;
 165                 }
 166                 /*
 167                  *      Yield the processor in case we are slow
 168                  */
 169                 set_current_state(TASK_UNINTERRUPTIBLE);
 170                 schedule_timeout(1);
 171         }
 172         if (ok != 1) {
 173                 /*
 174                  *      Restore interrupt mask even though we timed out
 175                  */
 176                 rkt_writeb(dev, MUnit.OIMR, dev->OIMR = 0xfb);
 177                 return -ETIMEDOUT;
 178         }
 179         /*
 180          *      Pull the synch status from Mailbox 0.
 181          */
 182         if (status)
 183                 *status = rkt_readl(dev, IndexRegs.Mailbox[0]);
 184         if (r1)
 185                 *r1 = rkt_readl(dev, IndexRegs.Mailbox[1]);
 186         if (r2)
 187                 *r2 = rkt_readl(dev, IndexRegs.Mailbox[2]);
 188         if (r3)
 189                 *r3 = rkt_readl(dev, IndexRegs.Mailbox[3]);
 190         if (r4)
 191                 *r4 = rkt_readl(dev, IndexRegs.Mailbox[4]);
 192         /*
 193          *      Clear the synch command doorbell.
 194          */
 195         rkt_writel(dev, OutboundDoorbellReg, OUTBOUNDDOORBELL_0);
 196         /*
 197          *      Restore interrupt mask
 198          */
 199         rkt_writeb(dev, MUnit.OIMR, dev->OIMR = 0xfb);
 200         return 0;
 201
 202 }
 203
 204 /**
 205  *      aac_rkt_interrupt_adapter       -       interrupt adapter
 206  *      @dev: Adapter
 207  *
 208  *      Send an interrupt to the i960 and breakpoint it.
 209  */
 210
 211 static void aac_rkt_interrupt_adapter(struct aac_dev *dev)
 212 {
 213         rkt_sync_cmd(dev, BREAKPOINT_REQUEST, 0, 0, 0, 0, 0, 0,
 214           NULL, NULL, NULL, NULL, NULL);
 215 }
 216
 217 /**
 218  *      aac_rkt_notify_adapter          -       send an event to the adapter
 219  *      @dev: Adapter
 220  *      @event: Event to send
 221  *
 222  *      Notify the i960 that something it probably cares about has
 223  *      happened.
 224  */
 225
 226 static void aac_rkt_notify_adapter(struct aac_dev *dev, u32 event)
 227 {
 228         switch (event) {
 229
 230         case AdapNormCmdQue:
 231                 rkt_writel(dev, MUnit.IDR,INBOUNDDOORBELL_1);
 232                 break;
 233         case HostNormRespNotFull:
 234                 rkt_writel(dev, MUnit.IDR,INBOUNDDOORBELL_4);
 235                 break;
 236         case AdapNormRespQue:
 237                 rkt_writel(dev, MUnit.IDR,INBOUNDDOORBELL_2);
 238                 break;
 239         case HostNormCmdNotFull:
 240                 rkt_writel(dev, MUnit.IDR,INBOUNDDOORBELL_3);
 241                 break;
 242         case HostShutdown:
 243 //              rkt_sync_cmd(dev, HOST_CRASHING, 0, 0, 0, 0, 0, 0,
 244 //                NULL, NULL, NULL, NULL, NULL);
 245                 break;
 246         case FastIo:
 247                 rkt_writel(dev, MUnit.IDR,INBOUNDDOORBELL_6);
 248                 break;
 249         case AdapPrintfDone:
 250                 rkt_writel(dev, MUnit.IDR,INBOUNDDOORBELL_5);
 251                 break;
 252         default:
 253                 BUG();
 254                 break;
 255         }
 256 }
 257
 258 /**
 259  *      aac_rkt_start_adapter           -       activate adapter
 260  *      @dev:   Adapter
 261  *
 262  *      Start up processing on an i960 based AAC adapter
 263  */
 264
 265 static void aac_rkt_start_adapter(struct aac_dev *dev)
 266 {
 267         struct aac_init *init;
 268
 269         init = dev->init;
 270         init->HostElapsedSeconds = cpu_to_le32(get_seconds());
 271         /*
 272          *      First clear out all interrupts.  Then enable the one's that we
 273          *      can handle.
 274          */
 275         rkt_writeb(dev, MUnit.OIMR, 0xff);
 276         rkt_writel(dev, MUnit.ODR, 0xffffffff);
 277 //      rkt_writeb(dev, MUnit.OIMR, ~(u8)OUTBOUND_DOORBELL_INTERRUPT_MASK);
 278         rkt_writeb(dev, MUnit.OIMR, dev->OIMR = 0xfb);
 279
 280         // We can only use a 32 bit address here
 281         rkt_sync_cmd(dev, INIT_STRUCT_BASE_ADDRESS, (u32)(ulong)dev->init_pa,
 282           0, 0, 0, 0, 0, NULL, NULL, NULL, NULL, NULL);
 283 }
 284
 285 /**
 286  *      aac_rkt_check_health
 287  *      @dev: device to check if healthy
 288  *
 289  *      Will attempt to determine if the specified adapter is alive and
 290  *      capable of handling requests, returning 0 if alive.
 291  */
 292 static int aac_rkt_check_health(struct aac_dev *dev)
 293 {
 294         u32 status = rkt_readl(dev, MUnit.OMRx[0]);
 295
 296         /*
 297          *      Check to see if the board failed any self tests.
 298          */
 299         if (status & SELF_TEST_FAILED)
 300                 return -1;
 301         /*
 302          *      Check to see if the board panic'd.
 303          */
 304         if (status & KERNEL_PANIC) {
 305                 char * buffer;
 306                 struct POSTSTATUS {
 307                         __le32 Post_Command;
 308                         __le32 Post_Address;
 309                 } * post;
 310                 dma_addr_t paddr, baddr;
 311                 int ret;
 312
 313                 if ((status & 0xFF000000L) == 0xBC000000L)
 314                         return (status >> 16) & 0xFF;
 315                 buffer = pci_alloc_consistent(dev->pdev, 512, &baddr);
 316                 ret = -2;
 317                 if (buffer == NULL)
 318                         return ret;
 319                 post = pci_alloc_consistent(dev->pdev,
 320                   sizeof(struct POSTSTATUS), &paddr);
 321                 if (post == NULL) {
 322                         pci_free_consistent(dev->pdev, 512, buffer, baddr);
 323                         return ret;
 324                 }
 325                 memset(buffer, 0, 512);
 326                 post->Post_Command = cpu_to_le32(COMMAND_POST_RESULTS);
 327                 post->Post_Address = cpu_to_le32(baddr);
 328                 rkt_writel(dev, MUnit.IMRx[0], paddr);
 329                 rkt_sync_cmd(dev, COMMAND_POST_RESULTS, baddr, 0, 0, 0, 0, 0,
 330                   NULL, NULL, NULL, NULL, NULL);
 331                 pci_free_consistent(dev->pdev, sizeof(struct POSTSTATUS),
 332                   post, paddr);
 333                 if ((buffer[0] == '0') && (buffer[1] == 'x')) {
 334                         ret = (buffer[2] <= '9') ? (buffer[2] - '0') : (buffer[2] - 'A' + 10);
 335                         ret <<= 4;
 336                         ret += (buffer[3] <= '9') ? (buffer[3] - '0') : (buffer[3] - 'A' + 10);
 337                 }
 338                 pci_free_consistent(dev->pdev, 512, buffer, baddr);
 339                 return ret;
 340         }
 341         /*
 342          *      Wait for the adapter to be up and running.
 343          */
 344         if (!(status & KERNEL_UP_AND_RUNNING))
 345                 return -3;
 346         /*
 347          *      Everything is OK
 348          */
 349         return 0;
 350 }
 351
 352 /**
 353  *      aac_rkt_init    -       initialize an i960 based AAC card
 354  *      @dev: device to configure
 355  *
 356  *      Allocate and set up resources for the i960 based AAC variants. The
 357  *      device_interface in the commregion will be allocated and linked
 358  *      to the comm region.
 359  */
 360
 361 int aac_rkt_init(struct aac_dev *dev)
 362 {
 363         unsigned long start;
 364         unsigned long status;
 365         int instance;
 366         const char * name;
 367
 368         instance = dev->id;
 369         name     = dev->name;
 370
 371         /*
 372          *      Map in the registers from the adapter.
 373          */
 374         if((dev->regs.rkt = ioremap((unsigned long)dev->scsi_host_ptr->base, 8192))==NULL)
 375         {
 376                 printk(KERN_WARNING "aacraid: unable to map i960.\n" );
 377                 goto error_iounmap;
 378         }
 379         /*
 380          *      Check to see if the board failed any self tests.
 381          */
 382         if (rkt_readl(dev, MUnit.OMRx[0]) & SELF_TEST_FAILED) {
 383                 printk(KERN_ERR "%s%d: adapter self-test failed.\n", dev->name, instance);
 384                 goto error_iounmap;
 385         }
 386         /*
 387          *      Check to see if the monitor panic'd while booting.
 388          */
 389         if (rkt_readl(dev, MUnit.OMRx[0]) & MONITOR_PANIC) {
 390                 printk(KERN_ERR "%s%d: adapter monitor panic.\n", dev->name, instance);
 391                 goto error_iounmap;
 392         }
 393         /*
 394          *      Check to see if the board panic'd while booting.
 395          */
 396         if (rkt_readl(dev, MUnit.OMRx[0]) & KERNEL_PANIC) {
 397                 printk(KERN_ERR "%s%d: adapter kernel panic'd.\n", dev->name, instance);
 398                 goto error_iounmap;
 399         }
 400         start = jiffies;
 401         /*
 402          *      Wait for the adapter to be up and running. Wait up to 3 minutes
 403          */
 404         while (!(rkt_readl(dev, MUnit.OMRx[0]) & KERNEL_UP_AND_RUNNING))
 405         {
 406                 if(time_after(jiffies, start+180*HZ))
 407                 {
 408                         status = rkt_readl(dev, MUnit.OMRx[0]);
 409                         printk(KERN_ERR "%s%d: adapter kernel failed to start, init status = %lx.\n",
 410                                         dev->name, instance, status);
 411                         goto error_iounmap;
 412                 }
 413                 set_current_state(TASK_UNINTERRUPTIBLE);
 414                 schedule_timeout(1);
 415         }
 416         if (request_irq(dev->scsi_host_ptr->irq, aac_rkt_intr, SA_SHIRQ|SA_INTERRUPT, "aacraid", (void *)dev)<0)
 417         {
 418                 printk(KERN_ERR "%s%d: Interrupt unavailable.\n", name, instance);
 419                 goto error_iounmap;
 420         }
 421         /*
 422          *      Fill in the function dispatch table.
 423          */
 424         dev->a_ops.adapter_interrupt = aac_rkt_interrupt_adapter;
 425         dev->a_ops.adapter_disable_int = aac_rkt_disable_interrupt;
 426         dev->a_ops.adapter_notify = aac_rkt_notify_adapter;
 427         dev->a_ops.adapter_sync_cmd = rkt_sync_cmd;
 428         dev->a_ops.adapter_check_health = aac_rkt_check_health;
 429
 430         /*
 431          *      First clear out all interrupts.  Then enable the one's that we
 432          *      can handle.
 433          */
 434         rkt_writeb(dev, MUnit.OIMR, 0xff);
 435         rkt_writel(dev, MUnit.ODR, 0xffffffff);
 436         rkt_writeb(dev, MUnit.OIMR, dev->OIMR = 0xfb);
 437
 438         if (aac_init_adapter(dev) == NULL)
 439                 goto error_irq;
 440         /*
 441          *      Start any kernel threads needed
 442          */
 443         dev->thread_pid = kernel_thread((int (*)(void *))aac_command_thread, dev, 0);
 444         if(dev->thread_pid < 0)
 445         {
 446                 printk(KERN_ERR "aacraid: Unable to create rkt thread.\n");
 447                 goto error_kfree;
 448         }
 449         /*
 450          *      Tell the adapter that all is configured, and it can start
 451          *      accepting requests
 452          */
 453         aac_rkt_start_adapter(dev);
 454         return 0;
 455
 456 error_kfree:
 457         kfree(dev->queues);
 458
 459 error_irq:
 460         rkt_writeb(dev, MUnit.OIMR, dev->OIMR = 0xff);
 461         free_irq(dev->scsi_host_ptr->irq, (void *)dev);
 462
 463 error_iounmap:
 464         iounmap(dev->regs.rkt);
 465
 466         return -1;
 467 }