drivers/scsi/aacraid/sa.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  *  sa.c
  26  *
  27  * Abstract: Drawbridge specific support 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_sa_intr(int irq, void *dev_id, struct pt_regs *regs)
  50 {
  51         struct aac_dev *dev = dev_id;
  52         unsigned short intstat, mask;
  53
  54         intstat = sa_readw(dev, DoorbellReg_p);
  55         /*
  56          *      Read mask and invert because drawbridge is reversed.
  57          *      This allows us to only service interrupts that have been enabled.
  58          */
  59         mask = ~(sa_readw(dev, SaDbCSR.PRISETIRQMASK));
  60
  61         /* Check to see if this is our interrupt.  If it isn't just return */
  62
  63         if (intstat & mask) {
  64                 if (intstat & PrintfReady) {
  65                         aac_printf(dev, sa_readl(dev, Mailbox5));
  66                         sa_writew(dev, DoorbellClrReg_p, PrintfReady); /* clear PrintfReady */
  67                         sa_writew(dev, DoorbellReg_s, PrintfDone);
  68                 } else if (intstat & DOORBELL_1) {      // dev -> Host Normal Command Ready
  69                         sa_writew(dev, DoorbellClrReg_p, DOORBELL_1);
  70                         aac_command_normal(&dev->queues->queue[HostNormCmdQueue]);
  71                 } else if (intstat & DOORBELL_2) {      // dev -> Host Normal Response Ready
  72                         sa_writew(dev, DoorbellClrReg_p, DOORBELL_2);
  73                         aac_response_normal(&dev->queues->queue[HostNormRespQueue]);
  74                 } else if (intstat & DOORBELL_3) {      // dev -> Host Normal Command Not Full
  75                         sa_writew(dev, DoorbellClrReg_p, DOORBELL_3);
  76                 } else if (intstat & DOORBELL_4) {      // dev -> Host Normal Response Not Full
  77                         sa_writew(dev, DoorbellClrReg_p, DOORBELL_4);
  78                 }
  79                 return IRQ_HANDLED;
  80         }
  81         return IRQ_NONE;
  82 }
  83
  84 /**
  85  *      aac_sa_disable_interrupt        -       disable interrupt
  86  *      @dev: Which adapter to enable.
  87  */
  88
  89 static void aac_sa_disable_interrupt (struct aac_dev *dev)
  90 {
  91         sa_writew(dev, SaDbCSR.PRISETIRQMASK, 0xffff);
  92 }
  93
  94 /**
  95  *      aac_sa_notify_adapter           -       handle adapter notification
  96  *      @dev:   Adapter that notification is for
  97  *      @event: Event to notidy
  98  *
  99  *      Notify the adapter of an event
 100  */
 101
 102 static void aac_sa_notify_adapter(struct aac_dev *dev, u32 event)
 103 {
 104         switch (event) {
 105
 106         case AdapNormCmdQue:
 107                 sa_writew(dev, DoorbellReg_s,DOORBELL_1);
 108                 break;
 109         case HostNormRespNotFull:
 110                 sa_writew(dev, DoorbellReg_s,DOORBELL_4);
 111                 break;
 112         case AdapNormRespQue:
 113                 sa_writew(dev, DoorbellReg_s,DOORBELL_2);
 114                 break;
 115         case HostNormCmdNotFull:
 116                 sa_writew(dev, DoorbellReg_s,DOORBELL_3);
 117                 break;
 118         case HostShutdown:
 119                 /*
 120                 sa_sync_cmd(dev, HOST_CRASHING, 0, 0, 0, 0, 0, 0,
 121                 NULL, NULL, NULL, NULL, NULL);
 122                 */
 123                 break;
 124         case FastIo:
 125                 sa_writew(dev, DoorbellReg_s,DOORBELL_6);
 126                 break;
 127         case AdapPrintfDone:
 128                 sa_writew(dev, DoorbellReg_s,DOORBELL_5);
 129                 break;
 130         default:
 131                 BUG();
 132                 break;
 133         }
 134 }
 135
 136
 137 /**
 138  *      sa_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 sa_sync_cmd(struct aac_dev *dev, u32 command,
 149                 u32 p1, u32 p2, u32 p3, u32 p4, u32 p5, u32 p6,
 150                 u32 *ret, 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         sa_writel(dev, Mailbox0, command);
 158         /*
 159          *      Write the parameters into Mailboxes 1 - 4
 160          */
 161         sa_writel(dev, Mailbox1, p1);
 162         sa_writel(dev, Mailbox2, p2);
 163         sa_writel(dev, Mailbox3, p3);
 164         sa_writel(dev, Mailbox4, p4);
 165
 166         /*
 167          *      Clear the synch command doorbell to start on a clean slate.
 168          */
 169         sa_writew(dev, DoorbellClrReg_p, DOORBELL_0);
 170         /*
 171          *      Signal that there is a new synch command
 172          */
 173         sa_writew(dev, DoorbellReg_s, DOORBELL_0);
 174
 175         ok = 0;
 176         start = jiffies;
 177
 178         while(time_before(jiffies, start+30*HZ))
 179         {
 180                 /*
 181                  *      Delay 5uS so that the monitor gets access
 182                  */
 183                 udelay(5);
 184                 /*
 185                  *      Mon110 will set doorbell0 bit when it has
 186                  *      completed the command.
 187                  */
 188                 if(sa_readw(dev, DoorbellReg_p) & DOORBELL_0)  {
 189                         ok = 1;
 190                         break;
 191                 }
 192                 msleep(1);
 193         }
 194
 195         if (ok != 1)
 196                 return -ETIMEDOUT;
 197         /*
 198          *      Clear the synch command doorbell.
 199          */
 200         sa_writew(dev, DoorbellClrReg_p, DOORBELL_0);
 201         /*
 202          *      Pull the synch status from Mailbox 0.
 203          */
 204         if (ret)
 205                 *ret = sa_readl(dev, Mailbox0);
 206         if (r1)
 207                 *r1 = sa_readl(dev, Mailbox1);
 208         if (r2)
 209                 *r2 = sa_readl(dev, Mailbox2);
 210         if (r3)
 211                 *r3 = sa_readl(dev, Mailbox3);
 212         if (r4)
 213                 *r4 = sa_readl(dev, Mailbox4);
 214         return 0;
 215 }
 216
 217 /**
 218  *      aac_sa_interrupt_adapter        -       interrupt an adapter
 219  *      @dev: Which adapter to enable.
 220  *
 221  *      Breakpoint an adapter.
 222  */
 223
 224 static void aac_sa_interrupt_adapter (struct aac_dev *dev)
 225 {
 226         sa_sync_cmd(dev, BREAKPOINT_REQUEST, 0, 0, 0, 0, 0, 0,
 227                         NULL, NULL, NULL, NULL, NULL);
 228 }
 229
 230 /**
 231  *      aac_sa_start_adapter            -       activate adapter
 232  *      @dev:   Adapter
 233  *
 234  *      Start up processing on an ARM based AAC adapter
 235  */
 236
 237 static void aac_sa_start_adapter(struct aac_dev *dev)
 238 {
 239         struct aac_init *init;
 240         /*
 241          * Fill in the remaining pieces of the init.
 242          */
 243         init = dev->init;
 244         init->HostElapsedSeconds = cpu_to_le32(get_seconds());
 245         /* We can only use a 32 bit address here */
 246         sa_sync_cmd(dev, INIT_STRUCT_BASE_ADDRESS,
 247                         (u32)(ulong)dev->init_pa, 0, 0, 0, 0, 0,
 248                         NULL, NULL, NULL, NULL, NULL);
 249 }
 250
 251 /**
 252  *      aac_sa_check_health
 253  *      @dev: device to check if healthy
 254  *
 255  *      Will attempt to determine if the specified adapter is alive and
 256  *      capable of handling requests, returning 0 if alive.
 257  */
 258 static int aac_sa_check_health(struct aac_dev *dev)
 259 {
 260         long status = sa_readl(dev, Mailbox7);
 261
 262         /*
 263          *      Check to see if the board failed any self tests.
 264          */
 265         if (status & SELF_TEST_FAILED)
 266                 return -1;
 267         /*
 268          *      Check to see if the board panic'd while booting.
 269          */
 270         if (status & KERNEL_PANIC)
 271                 return -2;
 272         /*
 273          *      Wait for the adapter to be up and running. Wait up to 3 minutes
 274          */
 275         if (!(status & KERNEL_UP_AND_RUNNING))
 276                 return -3;
 277         /*
 278          *      Everything is OK
 279          */
 280         return 0;
 281 }
 282
 283 /**
 284  *      aac_sa_init     -       initialize an ARM based AAC card
 285  *      @dev: device to configure
 286  *
 287  *      Allocate and set up resources for the ARM based AAC variants. The
 288  *      device_interface in the commregion will be allocated and linked
 289  *      to the comm region.
 290  */
 291
 292 int aac_sa_init(struct aac_dev *dev)
 293 {
 294         unsigned long start;
 295         unsigned long status;
 296         int instance;
 297         const char *name;
 298
 299         instance = dev->id;
 300         name     = dev->name;
 301
 302         /*
 303          *      Check to see if the board failed any self tests.
 304          */
 305         if (sa_readl(dev, Mailbox7) & SELF_TEST_FAILED) {
 306                 printk(KERN_WARNING "%s%d: adapter self-test failed.\n", name, instance);
 307                 goto error_iounmap;
 308         }
 309         /*
 310          *      Check to see if the board panic'd while booting.
 311          */
 312         if (sa_readl(dev, Mailbox7) & KERNEL_PANIC) {
 313                 printk(KERN_WARNING "%s%d: adapter kernel panic'd.\n", name, instance);
 314                 goto error_iounmap;
 315         }
 316         start = jiffies;
 317         /*
 318          *      Wait for the adapter to be up and running. Wait up to 3 minutes.
 319          */
 320         while (!(sa_readl(dev, Mailbox7) & KERNEL_UP_AND_RUNNING)) {
 321                 if (time_after(jiffies, start+startup_timeout*HZ)) {
 322                         status = sa_readl(dev, Mailbox7);
 323                         printk(KERN_WARNING "%s%d: adapter kernel failed to start, init status = %lx.\n",
 324                                         name, instance, status);
 325                         goto error_iounmap;
 326                 }
 327                 msleep(1);
 328         }
 329
 330         if (request_irq(dev->scsi_host_ptr->irq, aac_sa_intr, SA_SHIRQ|SA_INTERRUPT, "aacraid", (void *)dev ) < 0) {
 331                 printk(KERN_WARNING "%s%d: Interrupt unavailable.\n", name, instance);
 332                 goto error_iounmap;
 333         }
 334
 335         /*
 336          *      Fill in the function dispatch table.
 337          */
 338
 339         dev->a_ops.adapter_interrupt = aac_sa_interrupt_adapter;
 340         dev->a_ops.adapter_disable_int = aac_sa_disable_interrupt;
 341         dev->a_ops.adapter_notify = aac_sa_notify_adapter;
 342         dev->a_ops.adapter_sync_cmd = sa_sync_cmd;
 343         dev->a_ops.adapter_check_health = aac_sa_check_health;
 344
 345         /*
 346          *      First clear out all interrupts.  Then enable the one's that
 347          *      we can handle.
 348          */
 349         sa_writew(dev, SaDbCSR.PRISETIRQMASK, 0xffff);
 350         sa_writew(dev, SaDbCSR.PRICLEARIRQMASK, (PrintfReady | DOORBELL_1 |
 351                                 DOORBELL_2 | DOORBELL_3 | DOORBELL_4));
 352
 353         if(aac_init_adapter(dev) == NULL)
 354                 goto error_irq;
 355
 356         /*
 357          *      Tell the adapter that all is configure, and it can start
 358          *      accepting requests
 359          */
 360         aac_sa_start_adapter(dev);
 361         return 0;
 362
 363 error_irq:
 364         sa_writew(dev, SaDbCSR.PRISETIRQMASK, 0xffff);
 365         free_irq(dev->scsi_host_ptr->irq, (void *)dev);
 366
 367 error_iounmap:
 368
 369         return -1;
 370 }
 371