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/pci.h>
  35 #include <linux/spinlock.h>
  36 #include <linux/slab.h>
  37 #include <linux/blkdev.h>
  38 #include <linux/delay.h>
  39 #include <linux/completion.h>
  40 #include <linux/time.h>
  41 #include <linux/interrupt.h>
  42 #include <asm/semaphore.h>
  43
  44 #include <scsi/scsi_host.h>
  45
  46 #include "aacraid.h"
  47
  48 static irqreturn_t aac_sa_intr(int irq, void *dev_id)
  49 {
  50         struct aac_dev *dev = dev_id;
  51         unsigned short intstat, mask;
  52
  53         intstat = sa_readw(dev, DoorbellReg_p);
  54         /*
  55          *      Read mask and invert because drawbridge is reversed.
  56          *      This allows us to only service interrupts that have been enabled.
  57          */
  58         mask = ~(sa_readw(dev, SaDbCSR.PRISETIRQMASK));
  59
  60         /* Check to see if this is our interrupt.  If it isn't just return */
  61
  62         if (intstat & mask) {
  63                 if (intstat & PrintfReady) {
  64                         aac_printf(dev, sa_readl(dev, Mailbox5));
  65                         sa_writew(dev, DoorbellClrReg_p, PrintfReady); /* clear PrintfReady */
  66                         sa_writew(dev, DoorbellReg_s, PrintfDone);
  67                 } else if (intstat & DOORBELL_1) {      // dev -> Host Normal Command Ready
  68                         sa_writew(dev, DoorbellClrReg_p, DOORBELL_1);
  69                         aac_command_normal(&dev->queues->queue[HostNormCmdQueue]);
  70                 } else if (intstat & DOORBELL_2) {      // dev -> Host Normal Response Ready
  71                         sa_writew(dev, DoorbellClrReg_p, DOORBELL_2);
  72                         aac_response_normal(&dev->queues->queue[HostNormRespQueue]);
  73                 } else if (intstat & DOORBELL_3) {      // dev -> Host Normal Command Not Full
  74                         sa_writew(dev, DoorbellClrReg_p, DOORBELL_3);
  75                 } else if (intstat & DOORBELL_4) {      // dev -> Host Normal Response Not Full
  76                         sa_writew(dev, DoorbellClrReg_p, DOORBELL_4);
  77                 }
  78                 return IRQ_HANDLED;
  79         }
  80         return IRQ_NONE;
  81 }
  82
  83 /**
  84  *      aac_sa_disable_interrupt        -       disable interrupt
  85  *      @dev: Which adapter to enable.
  86  */
  87
  88 static void aac_sa_disable_interrupt (struct aac_dev *dev)
  89 {
  90         sa_writew(dev, SaDbCSR.PRISETIRQMASK, 0xffff);
  91 }
  92
  93 /**
  94  *      aac_sa_enable_interrupt -       enable interrupt
  95  *      @dev: Which adapter to enable.
  96  */
  97
  98 static void aac_sa_enable_interrupt (struct aac_dev *dev)
  99 {
 100         sa_writew(dev, SaDbCSR.PRICLEARIRQMASK, (PrintfReady | DOORBELL_1 |
 101                                 DOORBELL_2 | DOORBELL_3 | DOORBELL_4));
 102 }
 103
 104 /**
 105  *      aac_sa_notify_adapter           -       handle adapter notification
 106  *      @dev:   Adapter that notification is for
 107  *      @event: Event to notidy
 108  *
 109  *      Notify the adapter of an event
 110  */
 111
 112 static void aac_sa_notify_adapter(struct aac_dev *dev, u32 event)
 113 {
 114         switch (event) {
 115
 116         case AdapNormCmdQue:
 117                 sa_writew(dev, DoorbellReg_s,DOORBELL_1);
 118                 break;
 119         case HostNormRespNotFull:
 120                 sa_writew(dev, DoorbellReg_s,DOORBELL_4);
 121                 break;
 122         case AdapNormRespQue:
 123                 sa_writew(dev, DoorbellReg_s,DOORBELL_2);
 124                 break;
 125         case HostNormCmdNotFull:
 126                 sa_writew(dev, DoorbellReg_s,DOORBELL_3);
 127                 break;
 128         case HostShutdown:
 129                 /*
 130                 sa_sync_cmd(dev, HOST_CRASHING, 0, 0, 0, 0, 0, 0,
 131                 NULL, NULL, NULL, NULL, NULL);
 132                 */
 133                 break;
 134         case FastIo:
 135                 sa_writew(dev, DoorbellReg_s,DOORBELL_6);
 136                 break;
 137         case AdapPrintfDone:
 138                 sa_writew(dev, DoorbellReg_s,DOORBELL_5);
 139                 break;
 140         default:
 141                 BUG();
 142                 break;
 143         }
 144 }
 145
 146
 147 /**
 148  *      sa_sync_cmd     -       send a command and wait
 149  *      @dev: Adapter
 150  *      @command: Command to execute
 151  *      @p1: first parameter
 152  *      @ret: adapter status
 153  *
 154  *      This routine will send a synchronous command to the adapter and wait
 155  *      for its completion.
 156  */
 157
 158 static int sa_sync_cmd(struct aac_dev *dev, u32 command,
 159                 u32 p1, u32 p2, u32 p3, u32 p4, u32 p5, u32 p6,
 160                 u32 *ret, u32 *r1, u32 *r2, u32 *r3, u32 *r4)
 161 {
 162         unsigned long start;
 163         int ok;
 164         /*
 165          *      Write the Command into Mailbox 0
 166          */
 167         sa_writel(dev, Mailbox0, command);
 168         /*
 169          *      Write the parameters into Mailboxes 1 - 4
 170          */
 171         sa_writel(dev, Mailbox1, p1);
 172         sa_writel(dev, Mailbox2, p2);
 173         sa_writel(dev, Mailbox3, p3);
 174         sa_writel(dev, Mailbox4, p4);
 175
 176         /*
 177          *      Clear the synch command doorbell to start on a clean slate.
 178          */
 179         sa_writew(dev, DoorbellClrReg_p, DOORBELL_0);
 180         /*
 181          *      Signal that there is a new synch command
 182          */
 183         sa_writew(dev, DoorbellReg_s, DOORBELL_0);
 184
 185         ok = 0;
 186         start = jiffies;
 187
 188         while(time_before(jiffies, start+30*HZ))
 189         {
 190                 /*
 191                  *      Delay 5uS so that the monitor gets access
 192                  */
 193                 udelay(5);
 194                 /*
 195                  *      Mon110 will set doorbell0 bit when it has
 196                  *      completed the command.
 197                  */
 198                 if(sa_readw(dev, DoorbellReg_p) & DOORBELL_0)  {
 199                         ok = 1;
 200                         break;
 201                 }
 202                 msleep(1);
 203         }
 204
 205         if (ok != 1)
 206                 return -ETIMEDOUT;
 207         /*
 208          *      Clear the synch command doorbell.
 209          */
 210         sa_writew(dev, DoorbellClrReg_p, DOORBELL_0);
 211         /*
 212          *      Pull the synch status from Mailbox 0.
 213          */
 214         if (ret)
 215                 *ret = sa_readl(dev, Mailbox0);
 216         if (r1)
 217                 *r1 = sa_readl(dev, Mailbox1);
 218         if (r2)
 219                 *r2 = sa_readl(dev, Mailbox2);
 220         if (r3)
 221                 *r3 = sa_readl(dev, Mailbox3);
 222         if (r4)
 223                 *r4 = sa_readl(dev, Mailbox4);
 224         return 0;
 225 }
 226
 227 /**
 228  *      aac_sa_interrupt_adapter        -       interrupt an adapter
 229  *      @dev: Which adapter to enable.
 230  *
 231  *      Breakpoint an adapter.
 232  */
 233
 234 static void aac_sa_interrupt_adapter (struct aac_dev *dev)
 235 {
 236         sa_sync_cmd(dev, BREAKPOINT_REQUEST, 0, 0, 0, 0, 0, 0,
 237                         NULL, NULL, NULL, NULL, NULL);
 238 }
 239
 240 /**
 241  *      aac_sa_start_adapter            -       activate adapter
 242  *      @dev:   Adapter
 243  *
 244  *      Start up processing on an ARM based AAC adapter
 245  */
 246
 247 static void aac_sa_start_adapter(struct aac_dev *dev)
 248 {
 249         struct aac_init *init;
 250         /*
 251          * Fill in the remaining pieces of the init.
 252          */
 253         init = dev->init;
 254         init->HostElapsedSeconds = cpu_to_le32(get_seconds());
 255         /* We can only use a 32 bit address here */
 256         sa_sync_cmd(dev, INIT_STRUCT_BASE_ADDRESS,
 257                         (u32)(ulong)dev->init_pa, 0, 0, 0, 0, 0,
 258                         NULL, NULL, NULL, NULL, NULL);
 259 }
 260
 261 /**
 262  *      aac_sa_check_health
 263  *      @dev: device to check if healthy
 264  *
 265  *      Will attempt to determine if the specified adapter is alive and
 266  *      capable of handling requests, returning 0 if alive.
 267  */
 268 static int aac_sa_check_health(struct aac_dev *dev)
 269 {
 270         long status = sa_readl(dev, Mailbox7);
 271
 272         /*
 273          *      Check to see if the board failed any self tests.
 274          */
 275         if (status & SELF_TEST_FAILED)
 276                 return -1;
 277         /*
 278          *      Check to see if the board panic'd while booting.
 279          */
 280         if (status & KERNEL_PANIC)
 281                 return -2;
 282         /*
 283          *      Wait for the adapter to be up and running. Wait up to 3 minutes
 284          */
 285         if (!(status & KERNEL_UP_AND_RUNNING))
 286                 return -3;
 287         /*
 288          *      Everything is OK
 289          */
 290         return 0;
 291 }
 292
 293 /**
 294  *      aac_sa_ioremap
 295  *      @size: mapping resize request
 296  *
 297  */
 298 static int aac_sa_ioremap(struct aac_dev * dev, u32 size)
 299 {
 300         if (!size) {
 301                 iounmap(dev->regs.sa);
 302                 return 0;
 303         }
 304         dev->base = dev->regs.sa = ioremap(dev->scsi_host_ptr->base, size);
 305         return (dev->base == NULL) ? -1 : 0;
 306 }
 307
 308 /**
 309  *      aac_sa_init     -       initialize an ARM based AAC card
 310  *      @dev: device to configure
 311  *
 312  *      Allocate and set up resources for the ARM based AAC variants. The
 313  *      device_interface in the commregion will be allocated and linked
 314  *      to the comm region.
 315  */
 316
 317 int aac_sa_init(struct aac_dev *dev)
 318 {
 319         unsigned long start;
 320         unsigned long status;
 321         int instance;
 322         const char *name;
 323
 324         instance = dev->id;
 325         name     = dev->name;
 326
 327         if (aac_sa_ioremap(dev, dev->base_size)) {
 328                 printk(KERN_WARNING "%s: unable to map adapter.\n", name);
 329                 goto error_iounmap;
 330         }
 331
 332         /*
 333          *      Check to see if the board failed any self tests.
 334          */
 335         if (sa_readl(dev, Mailbox7) & SELF_TEST_FAILED) {
 336                 printk(KERN_WARNING "%s%d: adapter self-test failed.\n", name, instance);
 337                 goto error_iounmap;
 338         }
 339         /*
 340          *      Check to see if the board panic'd while booting.
 341          */
 342         if (sa_readl(dev, Mailbox7) & KERNEL_PANIC) {
 343                 printk(KERN_WARNING "%s%d: adapter kernel panic'd.\n", name, instance);
 344                 goto error_iounmap;
 345         }
 346         start = jiffies;
 347         /*
 348          *      Wait for the adapter to be up and running. Wait up to 3 minutes.
 349          */
 350         while (!(sa_readl(dev, Mailbox7) & KERNEL_UP_AND_RUNNING)) {
 351                 if (time_after(jiffies, start+startup_timeout*HZ)) {
 352                         status = sa_readl(dev, Mailbox7);
 353                         printk(KERN_WARNING "%s%d: adapter kernel failed to start, init status = %lx.\n",
 354                                         name, instance, status);
 355                         goto error_iounmap;
 356                 }
 357                 msleep(1);
 358         }
 359
 360         /*
 361          *      Fill in the function dispatch table.
 362          */
 363
 364         dev->a_ops.adapter_interrupt = aac_sa_interrupt_adapter;
 365         dev->a_ops.adapter_disable_int = aac_sa_disable_interrupt;
 366         dev->a_ops.adapter_enable_int = aac_sa_enable_interrupt;
 367         dev->a_ops.adapter_notify = aac_sa_notify_adapter;
 368         dev->a_ops.adapter_sync_cmd = sa_sync_cmd;
 369         dev->a_ops.adapter_check_health = aac_sa_check_health;
 370         dev->a_ops.adapter_intr = aac_sa_intr;
 371         dev->a_ops.adapter_ioremap = aac_sa_ioremap;
 372
 373         /*
 374          *      First clear out all interrupts.  Then enable the one's that
 375          *      we can handle.
 376          */
 377         aac_adapter_disable_int(dev);
 378         aac_adapter_enable_int(dev);
 379
 380         if(aac_init_adapter(dev) == NULL)
 381                 goto error_irq;
 382         if (request_irq(dev->scsi_host_ptr->irq, dev->a_ops.adapter_intr,
 383                         IRQF_SHARED|IRQF_DISABLED,
 384                         "aacraid", (void *)dev ) < 0) {
 385                 printk(KERN_WARNING "%s%d: Interrupt unavailable.\n",
 386                         name, instance);
 387                 goto error_iounmap;
 388         }
 389         aac_adapter_enable_int(dev);
 390
 391         /*
 392          *      Tell the adapter that all is configure, and it can start
 393          *      accepting requests
 394          */
 395         aac_sa_start_adapter(dev);
 396         return 0;
 397
 398 error_irq:
 399         aac_sa_disable_interrupt(dev);
 400         free_irq(dev->scsi_host_ptr->irq, (void *)dev);
 401
 402 error_iounmap:
 403
 404         return -1;
 405 }
 406