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(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 = rx_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 = rx_readl(dev, OutboundDoorbellReg);
  65                 if (bellbits & DoorBellPrintfReady) {
  66                         aac_printf(dev, rx_readl(dev, IndexRegs.Mailbox[5]));
  67                         rx_writel(dev, MUnit.ODR,DoorBellPrintfReady);
  68                         rx_writel(dev, InboundDoorbellReg,DoorBellPrintfDone);
  69                 }
  70                 else if (bellbits & DoorBellAdapterNormCmdReady) {
  71                         rx_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                         rx_writel(dev, MUnit.ODR,DoorBellAdapterNormRespReady);
  77                 }
  78                 else if (bellbits & DoorBellAdapterNormCmdNotFull) {
  79                         rx_writel(dev, MUnit.ODR, DoorBellAdapterNormCmdNotFull);
  80                 }
  81                 else if (bellbits & DoorBellAdapterNormRespNotFull) {
  82                         rx_writel(dev, MUnit.ODR, DoorBellAdapterNormCmdNotFull);
  83                         rx_writel(dev, MUnit.ODR, DoorBellAdapterNormRespNotFull);
  84                 }
  85                 return IRQ_HANDLED;
  86         }
  87         return IRQ_NONE;
  88 }
  89
  90 /**
  91  *      aac_rx_disable_interrupt        -       Disable interrupts
  92  *      @dev: Adapter
  93  */
  94
  95 static void aac_rx_disable_interrupt(struct aac_dev *dev)
  96 {
  97         rx_writeb(dev, MUnit.OIMR, dev->OIMR = 0xff);
  98 }
  99
 100 /**
 101  *      rx_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 rx_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         rx_writel(dev, InboundMailbox0, command);
 121         /*
 122          *      Write the parameters into Mailboxes 1 - 6
 123          */
 124         rx_writel(dev, InboundMailbox1, p1);
 125         rx_writel(dev, InboundMailbox2, p2);
 126         rx_writel(dev, InboundMailbox3, p3);
 127         rx_writel(dev, InboundMailbox4, p4);
 128         /*
 129          *      Clear the synch command doorbell to start on a clean slate.
 130          */
 131         rx_writel(dev, OutboundDoorbellReg, OUTBOUNDDOORBELL_0);
 132         /*
 133          *      Disable doorbell interrupts
 134          */
 135         rx_writeb(dev, MUnit.OIMR, dev->OIMR = 0xff);
 136         /*
 137          *      Force the completion of the mask register write before issuing
 138          *      the interrupt.
 139          */
 140         rx_readb (dev, MUnit.OIMR);
 141         /*
 142          *      Signal that there is a new synch command
 143          */
 144         rx_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 (rx_readl(dev, OutboundDoorbellReg) & OUTBOUNDDOORBELL_0) {
 159                         /*
 160                          *      Clear the doorbell.
 161                          */
 162                         rx_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                 rx_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 = rx_readl(dev, IndexRegs.Mailbox[0]);
 184         if (r1)
 185                 *r1 = rx_readl(dev, IndexRegs.Mailbox[1]);
 186         if (r2)
 187                 *r2 = rx_readl(dev, IndexRegs.Mailbox[2]);
 188         if (r3)
 189                 *r3 = rx_readl(dev, IndexRegs.Mailbox[3]);
 190         if (r4)
 191                 *r4 = rx_readl(dev, IndexRegs.Mailbox[4]);
 192         /*
 193          *      Clear the synch command doorbell.
 194          */
 195         rx_writel(dev, OutboundDoorbellReg, OUTBOUNDDOORBELL_0);
 196         /*
 197          *      Restore interrupt mask
 198          */
 199         rx_writeb(dev, MUnit.OIMR, dev->OIMR &= 0xfb);
 200         return 0;
 201
 202 }
 203
 204 /**
 205  *      aac_rx_interrupt_adapter        -       interrupt adapter
 206  *      @dev: Adapter
 207  *
 208  *      Send an interrupt to the i960 and breakpoint it.
 209  */
 210
 211 static void aac_rx_interrupt_adapter(struct aac_dev *dev)
 212 {
 213         rx_sync_cmd(dev, BREAKPOINT_REQUEST, 0, 0, 0, 0, 0, 0, NULL, NULL, NULL, NULL, NULL);
 214 }
 215
 216 /**
 217  *      aac_rx_notify_adapter           -       send an event to the adapter
 218  *      @dev: Adapter
 219  *      @event: Event to send
 220  *
 221  *      Notify the i960 that something it probably cares about has
 222  *      happened.
 223  */
 224
 225 static void aac_rx_notify_adapter(struct aac_dev *dev, u32 event)
 226 {
 227         switch (event) {
 228
 229         case AdapNormCmdQue:
 230                 rx_writel(dev, MUnit.IDR,INBOUNDDOORBELL_1);
 231                 break;
 232         case HostNormRespNotFull:
 233                 rx_writel(dev, MUnit.IDR,INBOUNDDOORBELL_4);
 234                 break;
 235         case AdapNormRespQue:
 236                 rx_writel(dev, MUnit.IDR,INBOUNDDOORBELL_2);
 237                 break;
 238         case HostNormCmdNotFull:
 239                 rx_writel(dev, MUnit.IDR,INBOUNDDOORBELL_3);
 240                 break;
 241         case HostShutdown:
 242 //              rx_sync_cmd(dev, HOST_CRASHING, 0, 0, 0, 0, 0, 0,
 243 //                NULL, NULL, NULL, NULL, NULL);
 244                 break;
 245         case FastIo:
 246                 rx_writel(dev, MUnit.IDR,INBOUNDDOORBELL_6);
 247                 break;
 248         case AdapPrintfDone:
 249                 rx_writel(dev, MUnit.IDR,INBOUNDDOORBELL_5);
 250                 break;
 251         default:
 252                 BUG();
 253                 break;
 254         }
 255 }
 256
 257 /**
 258  *      aac_rx_start_adapter            -       activate adapter
 259  *      @dev:   Adapter
 260  *
 261  *      Start up processing on an i960 based AAC adapter
 262  */
 263
 264 static void aac_rx_start_adapter(struct aac_dev *dev)
 265 {
 266         struct aac_init *init;
 267
 268         init = dev->init;
 269         init->HostElapsedSeconds = cpu_to_le32(get_seconds());
 270         /*
 271          *      First clear out all interrupts.  Then enable the one's that we
 272          *      can handle.
 273          */
 274         rx_writeb(dev, MUnit.OIMR, 0xff);
 275         rx_writel(dev, MUnit.ODR, 0xffffffff);
 276 //      rx_writeb(dev, MUnit.OIMR, ~(u8)OUTBOUND_DOORBELL_INTERRUPT_MASK);
 277         rx_writeb(dev, MUnit.OIMR, dev->OIMR = 0xfb);
 278
 279         // We can only use a 32 bit address here
 280         rx_sync_cmd(dev, INIT_STRUCT_BASE_ADDRESS, (u32)(ulong)dev->init_pa,
 281           0, 0, 0, 0, 0, NULL, NULL, NULL, NULL, NULL);
 282 }
 283
 284 /**
 285  *      aac_rx_check_health
 286  *      @dev: device to check if healthy
 287  *
 288  *      Will attempt to determine if the specified adapter is alive and
 289  *      capable of handling requests, returning 0 if alive.
 290  */
 291 static int aac_rx_check_health(struct aac_dev *dev)
 292 {
 293         u32 status = rx_readl(dev, MUnit.OMRx[0]);
 294
 295         /*
 296          *      Check to see if the board failed any self tests.
 297          */
 298         if (status & SELF_TEST_FAILED)
 299                 return -1;
 300         /*
 301          *      Check to see if the board panic'd.
 302          */
 303         if (status & KERNEL_PANIC) {
 304                 char * buffer;
 305                 struct POSTSTATUS {
 306                         __le32 Post_Command;
 307                         __le32 Post_Address;
 308                 } * post;
 309                 dma_addr_t paddr, baddr;
 310                 int ret;
 311
 312                 if ((status & 0xFF000000L) == 0xBC000000L)
 313                         return (status >> 16) & 0xFF;
 314                 buffer = pci_alloc_consistent(dev->pdev, 512, &baddr);
 315                 ret = -2;
 316                 if (buffer == NULL)
 317                         return ret;
 318                 post = pci_alloc_consistent(dev->pdev,
 319                   sizeof(struct POSTSTATUS), &paddr);
 320                 if (post == NULL) {
 321                         pci_free_consistent(dev->pdev, 512, buffer, baddr);
 322                         return ret;
 323                 }
 324                 memset(buffer, 0, 512);
 325                 post->Post_Command = cpu_to_le32(COMMAND_POST_RESULTS);
 326                 post->Post_Address = cpu_to_le32(baddr);
 327                 rx_writel(dev, MUnit.IMRx[0], paddr);
 328                 rx_sync_cmd(dev, COMMAND_POST_RESULTS, baddr, 0, 0, 0, 0, 0,
 329                   NULL, NULL, NULL, NULL, NULL);
 330                 pci_free_consistent(dev->pdev, sizeof(struct POSTSTATUS),
 331                   post, paddr);
 332                 if ((buffer[0] == '0') && (buffer[1] == 'x')) {
 333                         ret = (buffer[2] <= '9') ? (buffer[2] - '0') : (buffer[2] - 'A' + 10);
 334                         ret <<= 4;
 335                         ret += (buffer[3] <= '9') ? (buffer[3] - '0') : (buffer[3] - 'A' + 10);
 336                 }
 337                 pci_free_consistent(dev->pdev, 512, buffer, baddr);
 338                 return ret;
 339         }
 340         /*
 341          *      Wait for the adapter to be up and running.
 342          */
 343         if (!(status & KERNEL_UP_AND_RUNNING))
 344                 return -3;
 345         /*
 346          *      Everything is OK
 347          */
 348         return 0;
 349 }
 350
 351 /**
 352  *      aac_rx_init     -       initialize an i960 based AAC card
 353  *      @dev: device to configure
 354  *
 355  *      Allocate and set up resources for the i960 based AAC variants. The
 356  *      device_interface in the commregion will be allocated and linked
 357  *      to the comm region.
 358  */
 359
 360 int aac_rx_init(struct aac_dev *dev)
 361 {
 362         unsigned long start;
 363         unsigned long status;
 364         int instance;
 365         const char * name;
 366
 367         instance = dev->id;
 368         name     = dev->name;
 369
 370         /*
 371          *      Map in the registers from the adapter.
 372          */
 373         if((dev->regs.rx = ioremap((unsigned long)dev->scsi_host_ptr->base, 8192))==NULL)
 374         {
 375                 printk(KERN_WARNING "aacraid: unable to map i960.\n" );
 376                 return -1;
 377         }
 378         /*
 379          *      Check to see if the board failed any self tests.
 380          */
 381         if (rx_readl(dev, MUnit.OMRx[0]) & SELF_TEST_FAILED) {
 382                 printk(KERN_ERR "%s%d: adapter self-test failed.\n", dev->name, instance);
 383                 goto error_iounmap;
 384         }
 385         /*
 386          *      Check to see if the board panic'd while booting.
 387          */
 388         if (rx_readl(dev, MUnit.OMRx[0]) & KERNEL_PANIC) {
 389                 printk(KERN_ERR "%s%d: adapter kernel panic.\n", dev->name, instance);
 390                 goto error_iounmap;
 391         }
 392         /*
 393          *      Check to see if the monitor panic'd while booting.
 394          */
 395         if (rx_readl(dev, MUnit.OMRx[0]) & MONITOR_PANIC) {
 396                 printk(KERN_ERR "%s%d: adapter monitor panic.\n", dev->name, instance);
 397                 goto error_iounmap;
 398         }
 399         start = jiffies;
 400         /*
 401          *      Wait for the adapter to be up and running. Wait up to 3 minutes
 402          */
 403         while ((!(rx_readl(dev, IndexRegs.Mailbox[7]) & KERNEL_UP_AND_RUNNING))
 404                 || (!(rx_readl(dev, MUnit.OMRx[0]) & KERNEL_UP_AND_RUNNING)))
 405         {
 406                 if(time_after(jiffies, start+180*HZ))
 407                 {
 408                         status = rx_readl(dev, IndexRegs.Mailbox[7]);
 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_rx_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_rx_interrupt_adapter;
 425         dev->a_ops.adapter_disable_int = aac_rx_disable_interrupt;
 426         dev->a_ops.adapter_notify = aac_rx_notify_adapter;
 427         dev->a_ops.adapter_sync_cmd = rx_sync_cmd;
 428         dev->a_ops.adapter_check_health = aac_rx_check_health;
 429
 430         /*
 431          *      First clear out all interrupts.  Then enable the one's that we
 432          *      can handle.
 433          */
 434         rx_writeb(dev, MUnit.OIMR, 0xff);
 435         rx_writel(dev, MUnit.ODR, 0xffffffff);
 436         rx_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 rx 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_rx_start_adapter(dev);
 454         return 0;
 455
 456 error_kfree:
 457         kfree(dev->queues);
 458
 459 error_irq:
 460         rx_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.rx);
 465
 466         return -1;
 467 }