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_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                 set_current_state(TASK_UNINTERRUPTIBLE);
 193                 schedule_timeout(1);
 194         }
 195
 196         if (ok != 1)
 197                 return -ETIMEDOUT;
 198         /*
 199          *      Clear the synch command doorbell.
 200          */
 201         sa_writew(dev, DoorbellClrReg_p, DOORBELL_0);
 202         /*
 203          *      Pull the synch status from Mailbox 0.
 204          */
 205         if (ret)
 206                 *ret = sa_readl(dev, Mailbox0);
 207         if (r1)
 208                 *r1 = sa_readl(dev, Mailbox1);
 209         if (r2)
 210                 *r2 = sa_readl(dev, Mailbox2);
 211         if (r3)
 212                 *r3 = sa_readl(dev, Mailbox3);
 213         if (r4)
 214                 *r4 = sa_readl(dev, Mailbox4);
 215         return 0;
 216 }
 217
 218 /**
 219  *      aac_sa_interrupt_adapter        -       interrupt an adapter
 220  *      @dev: Which adapter to enable.
 221  *
 222  *      Breakpoint an adapter.
 223  */
 224
 225 static void aac_sa_interrupt_adapter (struct aac_dev *dev)
 226 {
 227         sa_sync_cmd(dev, BREAKPOINT_REQUEST, 0, 0, 0, 0, 0, 0,
 228                         NULL, NULL, NULL, NULL, NULL);
 229 }
 230
 231 /**
 232  *      aac_sa_start_adapter            -       activate adapter
 233  *      @dev:   Adapter
 234  *
 235  *      Start up processing on an ARM based AAC adapter
 236  */
 237
 238 static void aac_sa_start_adapter(struct aac_dev *dev)
 239 {
 240         u32 ret;
 241         struct aac_init *init;
 242         /*
 243          * Fill in the remaining pieces of the init.
 244          */
 245         init = dev->init;
 246         init->HostElapsedSeconds = cpu_to_le32(get_seconds());
 247
 248         /*
 249          * Tell the adapter we are back and up and running so it will scan its command
 250          * queues and enable our interrupts
 251          */
 252         dev->irq_mask = (PrintfReady | DOORBELL_1 | DOORBELL_2 | DOORBELL_3 | DOORBELL_4);
 253         /*
 254          *      First clear out all interrupts.  Then enable the one's that
 255          *      we can handle.
 256          */
 257         sa_writew(dev, SaDbCSR.PRISETIRQMASK, 0xffff);
 258         sa_writew(dev, SaDbCSR.PRICLEARIRQMASK, (PrintfReady | DOORBELL_1 | DOORBELL_2 | DOORBELL_3 | DOORBELL_4));
 259         /* We can only use a 32 bit address here */
 260         sa_sync_cmd(dev, INIT_STRUCT_BASE_ADDRESS,
 261                         (u32)(ulong)dev->init_pa, 0, 0, 0, 0, 0,
 262                         &ret, NULL, NULL, NULL, NULL);
 263 }
 264
 265 /**
 266  *      aac_sa_check_health
 267  *      @dev: device to check if healthy
 268  *
 269  *      Will attempt to determine if the specified adapter is alive and
 270  *      capable of handling requests, returning 0 if alive.
 271  */
 272 static int aac_sa_check_health(struct aac_dev *dev)
 273 {
 274         long status = sa_readl(dev, Mailbox7);
 275
 276         /*
 277          *      Check to see if the board failed any self tests.
 278          */
 279         if (status & SELF_TEST_FAILED)
 280                 return -1;
 281         /*
 282          *      Check to see if the board panic'd while booting.
 283          */
 284         if (status & KERNEL_PANIC)
 285                 return -2;
 286         /*
 287          *      Wait for the adapter to be up and running. Wait up to 3 minutes
 288          */
 289         if (!(status & KERNEL_UP_AND_RUNNING))
 290                 return -3;
 291         /*
 292          *      Everything is OK
 293          */
 294         return 0;
 295 }
 296
 297 /**
 298  *      aac_sa_init     -       initialize an ARM based AAC card
 299  *      @dev: device to configure
 300  *
 301  *      Allocate and set up resources for the ARM based AAC variants. The
 302  *      device_interface in the commregion will be allocated and linked
 303  *      to the comm region.
 304  */
 305
 306 int aac_sa_init(struct aac_dev *dev)
 307 {
 308         unsigned long start;
 309         unsigned long status;
 310         int instance;
 311         const char *name;
 312
 313         instance = dev->id;
 314         name     = dev->name;
 315
 316         /*
 317          *      Map in the registers from the adapter.
 318          */
 319
 320         if((dev->regs.sa = ioremap((unsigned long)dev->scsi_host_ptr->base, 8192))==NULL)
 321         {
 322                 printk(KERN_WARNING "aacraid: unable to map ARM.\n" );
 323                 goto error_iounmap;
 324         }
 325         /*
 326          *      Check to see if the board failed any self tests.
 327          */
 328         if (sa_readl(dev, Mailbox7) & SELF_TEST_FAILED) {
 329                 printk(KERN_WARNING "%s%d: adapter self-test failed.\n", name, instance);
 330                 goto error_iounmap;
 331         }
 332         /*
 333          *      Check to see if the board panic'd while booting.
 334          */
 335         if (sa_readl(dev, Mailbox7) & KERNEL_PANIC) {
 336                 printk(KERN_WARNING "%s%d: adapter kernel panic'd.\n", name, instance);
 337                 goto error_iounmap;
 338         }
 339         start = jiffies;
 340         /*
 341          *      Wait for the adapter to be up and running. Wait up to 3 minutes.
 342          */
 343         while (!(sa_readl(dev, Mailbox7) & KERNEL_UP_AND_RUNNING)) {
 344                 if (time_after(jiffies, start+180*HZ)) {
 345                         status = sa_readl(dev, Mailbox7);
 346                         printk(KERN_WARNING "%s%d: adapter kernel failed to start, init status = %lx.\n",
 347                                         name, instance, status);
 348                         goto error_iounmap;
 349                 }
 350                 set_current_state(TASK_UNINTERRUPTIBLE);
 351                 schedule_timeout(1);
 352         }
 353
 354         if (request_irq(dev->scsi_host_ptr->irq, aac_sa_intr, SA_SHIRQ|SA_INTERRUPT, "aacraid", (void *)dev ) < 0) {
 355                 printk(KERN_WARNING "%s%d: Interrupt unavailable.\n", name, instance);
 356                 goto error_iounmap;
 357         }
 358
 359         /*
 360          *      Fill in the function dispatch table.
 361          */
 362
 363         dev->a_ops.adapter_interrupt = aac_sa_interrupt_adapter;
 364         dev->a_ops.adapter_disable_int = aac_sa_disable_interrupt;
 365         dev->a_ops.adapter_notify = aac_sa_notify_adapter;
 366         dev->a_ops.adapter_sync_cmd = sa_sync_cmd;
 367         dev->a_ops.adapter_check_health = aac_sa_check_health;
 368
 369         /*
 370          *      First clear out all interrupts.  Then enable the one's that
 371          *      we can handle.
 372          */
 373         sa_writew(dev, SaDbCSR.PRISETIRQMASK, 0xffff);
 374         sa_writew(dev, SaDbCSR.PRICLEARIRQMASK, (PrintfReady | DOORBELL_1 |
 375                                 DOORBELL_2 | DOORBELL_3 | DOORBELL_4));
 376
 377         if(aac_init_adapter(dev) == NULL)
 378                 goto error_irq;
 379
 380         /*
 381          *      Start any kernel threads needed
 382          */
 383         dev->thread_pid = kernel_thread((int (*)(void *))aac_command_thread, dev, 0);
 384         if (dev->thread_pid < 0) {
 385                 printk(KERN_ERR "aacraid: Unable to create command thread.\n");
 386                 goto error_kfree;
 387         }
 388
 389         /*
 390          *      Tell the adapter that all is configure, and it can start
 391          *      accepting requests
 392          */
 393         aac_sa_start_adapter(dev);
 394         return 0;
 395
 396
 397 error_kfree:
 398         kfree(dev->queues);
 399
 400 error_irq:
 401         sa_writew(dev, SaDbCSR.PRISETIRQMASK, 0xffff);
 402         free_irq(dev->scsi_host_ptr->irq, (void *)dev);
 403
 404 error_iounmap:
 405         iounmap(dev->regs.sa);
 406
 407         return -1;
 408 }
 409