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                         aac_command_normal(&dev->queues->queue[HostNormCmdQueue]);
  70                         sa_writew(dev, DoorbellClrReg_p, DOORBELL_1);
  71                 } else if (intstat & DOORBELL_2) {      // dev -> Host Normal Response Ready
  72                         aac_response_normal(&dev->queues->queue[HostNormRespQueue]);
  73                         sa_writew(dev, DoorbellClrReg_p, DOORBELL_2);
  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_notify_adapter           -       handle adapter notification
  86  *      @dev:   Adapter that notification is for
  87  *      @event: Event to notidy
  88  *
  89  *      Notify the adapter of an event
  90  */
  91
  92 static void aac_sa_notify_adapter(struct aac_dev *dev, u32 event)
  93 {
  94         switch (event) {
  95
  96         case AdapNormCmdQue:
  97                 sa_writew(dev, DoorbellReg_s,DOORBELL_1);
  98                 break;
  99         case HostNormRespNotFull:
 100                 sa_writew(dev, DoorbellReg_s,DOORBELL_4);
 101                 break;
 102         case AdapNormRespQue:
 103                 sa_writew(dev, DoorbellReg_s,DOORBELL_2);
 104                 break;
 105         case HostNormCmdNotFull:
 106                 sa_writew(dev, DoorbellReg_s,DOORBELL_3);
 107                 break;
 108         case HostShutdown:
 109                 /*
 110                 sa_sync_cmd(dev, HOST_CRASHING, 0, 0, 0, 0, 0, 0,
 111                 NULL, NULL, NULL, NULL, NULL);
 112                 */
 113                 break;
 114         case FastIo:
 115                 sa_writew(dev, DoorbellReg_s,DOORBELL_6);
 116                 break;
 117         case AdapPrintfDone:
 118                 sa_writew(dev, DoorbellReg_s,DOORBELL_5);
 119                 break;
 120         default:
 121                 BUG();
 122                 break;
 123         }
 124 }
 125
 126
 127 /**
 128  *      sa_sync_cmd     -       send a command and wait
 129  *      @dev: Adapter
 130  *      @command: Command to execute
 131  *      @p1: first parameter
 132  *      @ret: adapter status
 133  *
 134  *      This routine will send a synchronous command to the adapter and wait
 135  *      for its completion.
 136  */
 137
 138 static int sa_sync_cmd(struct aac_dev *dev, u32 command,
 139                 u32 p1, u32 p2, u32 p3, u32 p4, u32 p5, u32 p6,
 140                 u32 *ret, u32 *r1, u32 *r2, u32 *r3, u32 *r4)
 141 {
 142         unsigned long start;
 143         int ok;
 144         /*
 145          *      Write the Command into Mailbox 0
 146          */
 147         sa_writel(dev, Mailbox0, command);
 148         /*
 149          *      Write the parameters into Mailboxes 1 - 4
 150          */
 151         sa_writel(dev, Mailbox1, p1);
 152         sa_writel(dev, Mailbox2, p2);
 153         sa_writel(dev, Mailbox3, p3);
 154         sa_writel(dev, Mailbox4, p4);
 155
 156         /*
 157          *      Clear the synch command doorbell to start on a clean slate.
 158          */
 159         sa_writew(dev, DoorbellClrReg_p, DOORBELL_0);
 160         /*
 161          *      Signal that there is a new synch command
 162          */
 163         sa_writew(dev, DoorbellReg_s, DOORBELL_0);
 164
 165         ok = 0;
 166         start = jiffies;
 167
 168         while(time_before(jiffies, start+30*HZ))
 169         {
 170                 /*
 171                  *      Delay 5uS so that the monitor gets access
 172                  */
 173                 udelay(5);
 174                 /*
 175                  *      Mon110 will set doorbell0 bit when it has
 176                  *      completed the command.
 177                  */
 178                 if(sa_readw(dev, DoorbellReg_p) & DOORBELL_0)  {
 179                         ok = 1;
 180                         break;
 181                 }
 182                 set_current_state(TASK_UNINTERRUPTIBLE);
 183                 schedule_timeout(1);
 184         }
 185
 186         if (ok != 1)
 187                 return -ETIMEDOUT;
 188         /*
 189          *      Clear the synch command doorbell.
 190          */
 191         sa_writew(dev, DoorbellClrReg_p, DOORBELL_0);
 192         /*
 193          *      Pull the synch status from Mailbox 0.
 194          */
 195         if (ret)
 196                 *ret = sa_readl(dev, Mailbox0);
 197         if (r1)
 198                 *r1 = sa_readl(dev, Mailbox1);
 199         if (r2)
 200                 *r2 = sa_readl(dev, Mailbox2);
 201         if (r3)
 202                 *r3 = sa_readl(dev, Mailbox3);
 203         if (r4)
 204                 *r4 = sa_readl(dev, Mailbox4);
 205         return 0;
 206 }
 207
 208 /**
 209  *      aac_sa_interrupt_adapter        -       interrupt an adapter
 210  *      @dev: Which adapter to enable.
 211  *
 212  *      Breakpoint an adapter.
 213  */
 214
 215 static void aac_sa_interrupt_adapter (struct aac_dev *dev)
 216 {
 217         u32 ret;
 218         sa_sync_cmd(dev, BREAKPOINT_REQUEST, 0, 0, 0, 0, 0, 0,
 219                         &ret, NULL, NULL, NULL, NULL);
 220 }
 221
 222 /**
 223  *      aac_sa_start_adapter            -       activate adapter
 224  *      @dev:   Adapter
 225  *
 226  *      Start up processing on an ARM based AAC adapter
 227  */
 228
 229 static void aac_sa_start_adapter(struct aac_dev *dev)
 230 {
 231         u32 ret;
 232         struct aac_init *init;
 233         /*
 234          * Fill in the remaining pieces of the init.
 235          */
 236         init = dev->init;
 237         init->HostElapsedSeconds = cpu_to_le32(get_seconds());
 238
 239         /*
 240          * Tell the adapter we are back and up and running so it will scan its command
 241          * queues and enable our interrupts
 242          */
 243         dev->irq_mask = (PrintfReady | DOORBELL_1 | DOORBELL_2 | DOORBELL_3 | DOORBELL_4);
 244         /*
 245          *      First clear out all interrupts.  Then enable the one's that
 246          *      we can handle.
 247          */
 248         sa_writew(dev, SaDbCSR.PRISETIRQMASK, 0xffff);
 249         sa_writew(dev, SaDbCSR.PRICLEARIRQMASK, (PrintfReady | DOORBELL_1 | DOORBELL_2 | DOORBELL_3 | DOORBELL_4));
 250         /* We can only use a 32 bit address here */
 251         sa_sync_cmd(dev, INIT_STRUCT_BASE_ADDRESS,
 252                         (u32)(ulong)dev->init_pa, 0, 0, 0, 0, 0,
 253                         &ret, NULL, NULL, NULL, NULL);
 254 }
 255
 256 /**
 257  *      aac_sa_check_health
 258  *      @dev: device to check if healthy
 259  *
 260  *      Will attempt to determine if the specified adapter is alive and
 261  *      capable of handling requests, returning 0 if alive.
 262  */
 263 static int aac_sa_check_health(struct aac_dev *dev)
 264 {
 265         long status = sa_readl(dev, Mailbox7);
 266
 267         /*
 268          *      Check to see if the board failed any self tests.
 269          */
 270         if (status & SELF_TEST_FAILED)
 271                 return -1;
 272         /*
 273          *      Check to see if the board panic'd while booting.
 274          */
 275         if (status & KERNEL_PANIC)
 276                 return -2;
 277         /*
 278          *      Wait for the adapter to be up and running. Wait up to 3 minutes
 279          */
 280         if (!(status & KERNEL_UP_AND_RUNNING))
 281                 return -3;
 282         /*
 283          *      Everything is OK
 284          */
 285         return 0;
 286 }
 287
 288 /**
 289  *      aac_sa_init     -       initialize an ARM based AAC card
 290  *      @dev: device to configure
 291  *
 292  *      Allocate and set up resources for the ARM based AAC variants. The
 293  *      device_interface in the commregion will be allocated and linked
 294  *      to the comm region.
 295  */
 296
 297 int aac_sa_init(struct aac_dev *dev)
 298 {
 299         unsigned long start;
 300         unsigned long status;
 301         int instance;
 302         const char *name;
 303
 304         instance = dev->id;
 305         name     = dev->name;
 306
 307         /*
 308          *      Map in the registers from the adapter.
 309          */
 310
 311         if((dev->regs.sa = ioremap((unsigned long)dev->scsi_host_ptr->base, 8192))==NULL)
 312         {
 313                 printk(KERN_WARNING "aacraid: unable to map ARM.\n" );
 314                 goto error_iounmap;
 315         }
 316         /*
 317          *      Check to see if the board failed any self tests.
 318          */
 319         if (sa_readl(dev, Mailbox7) & SELF_TEST_FAILED) {
 320                 printk(KERN_WARNING "%s%d: adapter self-test failed.\n", name, instance);
 321                 goto error_iounmap;
 322         }
 323         /*
 324          *      Check to see if the board panic'd while booting.
 325          */
 326         if (sa_readl(dev, Mailbox7) & KERNEL_PANIC) {
 327                 printk(KERN_WARNING "%s%d: adapter kernel panic'd.\n", name, instance);
 328                 goto error_iounmap;
 329         }
 330         start = jiffies;
 331         /*
 332          *      Wait for the adapter to be up and running. Wait up to 3 minutes.
 333          */
 334         while (!(sa_readl(dev, Mailbox7) & KERNEL_UP_AND_RUNNING)) {
 335                 if (time_after(jiffies, start+180*HZ)) {
 336                         status = sa_readl(dev, Mailbox7);
 337                         printk(KERN_WARNING "%s%d: adapter kernel failed to start, init status = %lx.\n",
 338                                         name, instance, status);
 339                         goto error_iounmap;
 340                 }
 341                 set_current_state(TASK_UNINTERRUPTIBLE);
 342                 schedule_timeout(1);
 343         }
 344
 345         if (request_irq(dev->scsi_host_ptr->irq, aac_sa_intr, SA_SHIRQ|SA_INTERRUPT, "aacraid", (void *)dev ) < 0) {
 346                 printk(KERN_WARNING "%s%d: Interrupt unavailable.\n", name, instance);
 347                 goto error_iounmap;
 348         }
 349
 350         /*
 351          *      Fill in the function dispatch table.
 352          */
 353
 354         dev->a_ops.adapter_interrupt = aac_sa_interrupt_adapter;
 355         dev->a_ops.adapter_notify = aac_sa_notify_adapter;
 356         dev->a_ops.adapter_sync_cmd = sa_sync_cmd;
 357         dev->a_ops.adapter_check_health = aac_sa_check_health;
 358
 359
 360         if(aac_init_adapter(dev) == NULL)
 361                 goto error_irq;
 362
 363         /*
 364          *      Start any kernel threads needed
 365          */
 366         dev->thread_pid = kernel_thread((int (*)(void *))aac_command_thread, dev, 0);
 367         if (dev->thread_pid < 0) {
 368                 printk(KERN_ERR "aacraid: Unable to create command thread.\n");
 369                 goto error_kfree;
 370         }
 371
 372         /*
 373          *      Tell the adapter that all is configure, and it can start
 374          *      accepting requests
 375          */
 376         aac_sa_start_adapter(dev);
 377         return 0;
 378
 379
 380 error_kfree:
 381         kfree(dev->queues);
 382
 383 error_irq:
 384         free_irq(dev->scsi_host_ptr->irq, (void *)dev);
 385
 386 error_iounmap:
 387         iounmap(dev->regs.sa);
 388
 389         return -1;
 390 }
 391