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)
  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_enable_interrupt -       enable interrupt
  96  *      @dev: Which adapter to enable.
  97  */
  98
  99 static void aac_sa_enable_interrupt (struct aac_dev *dev)
 100 {
 101         sa_writew(dev, SaDbCSR.PRICLEARIRQMASK, (PrintfReady | DOORBELL_1 |
 102                                 DOORBELL_2 | DOORBELL_3 | DOORBELL_4));
 103 }
 104
 105 /**
 106  *      aac_sa_notify_adapter           -       handle adapter notification
 107  *      @dev:   Adapter that notification is for
 108  *      @event: Event to notidy
 109  *
 110  *      Notify the adapter of an event
 111  */
 112
 113 static void aac_sa_notify_adapter(struct aac_dev *dev, u32 event)
 114 {
 115         switch (event) {
 116
 117         case AdapNormCmdQue:
 118                 sa_writew(dev, DoorbellReg_s,DOORBELL_1);
 119                 break;
 120         case HostNormRespNotFull:
 121                 sa_writew(dev, DoorbellReg_s,DOORBELL_4);
 122                 break;
 123         case AdapNormRespQue:
 124                 sa_writew(dev, DoorbellReg_s,DOORBELL_2);
 125                 break;
 126         case HostNormCmdNotFull:
 127                 sa_writew(dev, DoorbellReg_s,DOORBELL_3);
 128                 break;
 129         case HostShutdown:
 130                 /*
 131                 sa_sync_cmd(dev, HOST_CRASHING, 0, 0, 0, 0, 0, 0,
 132                 NULL, NULL, NULL, NULL, NULL);
 133                 */
 134                 break;
 135         case FastIo:
 136                 sa_writew(dev, DoorbellReg_s,DOORBELL_6);
 137                 break;
 138         case AdapPrintfDone:
 139                 sa_writew(dev, DoorbellReg_s,DOORBELL_5);
 140                 break;
 141         default:
 142                 BUG();
 143                 break;
 144         }
 145 }
 146
 147
 148 /**
 149  *      sa_sync_cmd     -       send a command and wait
 150  *      @dev: Adapter
 151  *      @command: Command to execute
 152  *      @p1: first parameter
 153  *      @ret: adapter status
 154  *
 155  *      This routine will send a synchronous command to the adapter and wait
 156  *      for its completion.
 157  */
 158
 159 static int sa_sync_cmd(struct aac_dev *dev, u32 command,
 160                 u32 p1, u32 p2, u32 p3, u32 p4, u32 p5, u32 p6,
 161                 u32 *ret, u32 *r1, u32 *r2, u32 *r3, u32 *r4)
 162 {
 163         unsigned long start;
 164         int ok;
 165         /*
 166          *      Write the Command into Mailbox 0
 167          */
 168         sa_writel(dev, Mailbox0, command);
 169         /*
 170          *      Write the parameters into Mailboxes 1 - 4
 171          */
 172         sa_writel(dev, Mailbox1, p1);
 173         sa_writel(dev, Mailbox2, p2);
 174         sa_writel(dev, Mailbox3, p3);
 175         sa_writel(dev, Mailbox4, p4);
 176
 177         /*
 178          *      Clear the synch command doorbell to start on a clean slate.
 179          */
 180         sa_writew(dev, DoorbellClrReg_p, DOORBELL_0);
 181         /*
 182          *      Signal that there is a new synch command
 183          */
 184         sa_writew(dev, DoorbellReg_s, DOORBELL_0);
 185
 186         ok = 0;
 187         start = jiffies;
 188
 189         while(time_before(jiffies, start+30*HZ))
 190         {
 191                 /*
 192                  *      Delay 5uS so that the monitor gets access
 193                  */
 194                 udelay(5);
 195                 /*
 196                  *      Mon110 will set doorbell0 bit when it has
 197                  *      completed the command.
 198                  */
 199                 if(sa_readw(dev, DoorbellReg_p) & DOORBELL_0)  {
 200                         ok = 1;
 201                         break;
 202                 }
 203                 msleep(1);
 204         }
 205
 206         if (ok != 1)
 207                 return -ETIMEDOUT;
 208         /*
 209          *      Clear the synch command doorbell.
 210          */
 211         sa_writew(dev, DoorbellClrReg_p, DOORBELL_0);
 212         /*
 213          *      Pull the synch status from Mailbox 0.
 214          */
 215         if (ret)
 216                 *ret = sa_readl(dev, Mailbox0);
 217         if (r1)
 218                 *r1 = sa_readl(dev, Mailbox1);
 219         if (r2)
 220                 *r2 = sa_readl(dev, Mailbox2);
 221         if (r3)
 222                 *r3 = sa_readl(dev, Mailbox3);
 223         if (r4)
 224                 *r4 = sa_readl(dev, Mailbox4);
 225         return 0;
 226 }
 227
 228 /**
 229  *      aac_sa_interrupt_adapter        -       interrupt an adapter
 230  *      @dev: Which adapter to enable.
 231  *
 232  *      Breakpoint an adapter.
 233  */
 234
 235 static void aac_sa_interrupt_adapter (struct aac_dev *dev)
 236 {
 237         sa_sync_cmd(dev, BREAKPOINT_REQUEST, 0, 0, 0, 0, 0, 0,
 238                         NULL, NULL, NULL, NULL, NULL);
 239 }
 240
 241 /**
 242  *      aac_sa_start_adapter            -       activate adapter
 243  *      @dev:   Adapter
 244  *
 245  *      Start up processing on an ARM based AAC adapter
 246  */
 247
 248 static void aac_sa_start_adapter(struct aac_dev *dev)
 249 {
 250         struct aac_init *init;
 251         /*
 252          * Fill in the remaining pieces of the init.
 253          */
 254         init = dev->init;
 255         init->HostElapsedSeconds = cpu_to_le32(get_seconds());
 256         /* We can only use a 32 bit address here */
 257         sa_sync_cmd(dev, INIT_STRUCT_BASE_ADDRESS,
 258                         (u32)(ulong)dev->init_pa, 0, 0, 0, 0, 0,
 259                         NULL, NULL, NULL, NULL, NULL);
 260 }
 261
 262 /**
 263  *      aac_sa_check_health
 264  *      @dev: device to check if healthy
 265  *
 266  *      Will attempt to determine if the specified adapter is alive and
 267  *      capable of handling requests, returning 0 if alive.
 268  */
 269 static int aac_sa_check_health(struct aac_dev *dev)
 270 {
 271         long status = sa_readl(dev, Mailbox7);
 272
 273         /*
 274          *      Check to see if the board failed any self tests.
 275          */
 276         if (status & SELF_TEST_FAILED)
 277                 return -1;
 278         /*
 279          *      Check to see if the board panic'd while booting.
 280          */
 281         if (status & KERNEL_PANIC)
 282                 return -2;
 283         /*
 284          *      Wait for the adapter to be up and running. Wait up to 3 minutes
 285          */
 286         if (!(status & KERNEL_UP_AND_RUNNING))
 287                 return -3;
 288         /*
 289          *      Everything is OK
 290          */
 291         return 0;
 292 }
 293
 294 /**
 295  *      aac_sa_ioremap
 296  *      @size: mapping resize request
 297  *
 298  */
 299 static int aac_sa_ioremap(struct aac_dev * dev, u32 size)
 300 {
 301         if (!size) {
 302                 iounmap(dev->regs.sa);
 303                 return 0;
 304         }
 305         dev->base = dev->regs.sa = ioremap(dev->scsi_host_ptr->base, size);
 306         return (dev->base == NULL) ? -1 : 0;
 307 }
 308
 309 /**
 310  *      aac_sa_init     -       initialize an ARM based AAC card
 311  *      @dev: device to configure
 312  *
 313  *      Allocate and set up resources for the ARM based AAC variants. The
 314  *      device_interface in the commregion will be allocated and linked
 315  *      to the comm region.
 316  */
 317
 318 int aac_sa_init(struct aac_dev *dev)
 319 {
 320         unsigned long start;
 321         unsigned long status;
 322         int instance;
 323         const char *name;
 324
 325         instance = dev->id;
 326         name     = dev->name;
 327
 328         if (aac_sa_ioremap(dev, dev->base_size)) {
 329                 printk(KERN_WARNING "%s: unable to map adapter.\n", name);
 330                 goto error_iounmap;
 331         }
 332
 333         /*
 334          *      Check to see if the board failed any self tests.
 335          */
 336         if (sa_readl(dev, Mailbox7) & SELF_TEST_FAILED) {
 337                 printk(KERN_WARNING "%s%d: adapter self-test failed.\n", name, instance);
 338                 goto error_iounmap;
 339         }
 340         /*
 341          *      Check to see if the board panic'd while booting.
 342          */
 343         if (sa_readl(dev, Mailbox7) & KERNEL_PANIC) {
 344                 printk(KERN_WARNING "%s%d: adapter kernel panic'd.\n", name, instance);
 345                 goto error_iounmap;
 346         }
 347         start = jiffies;
 348         /*
 349          *      Wait for the adapter to be up and running. Wait up to 3 minutes.
 350          */
 351         while (!(sa_readl(dev, Mailbox7) & KERNEL_UP_AND_RUNNING)) {
 352                 if (time_after(jiffies, start+startup_timeout*HZ)) {
 353                         status = sa_readl(dev, Mailbox7);
 354                         printk(KERN_WARNING "%s%d: adapter kernel failed to start, init status = %lx.\n",
 355                                         name, instance, status);
 356                         goto error_iounmap;
 357                 }
 358                 msleep(1);
 359         }
 360
 361         /*
 362          *      Fill in the function dispatch table.
 363          */
 364
 365         dev->a_ops.adapter_interrupt = aac_sa_interrupt_adapter;
 366         dev->a_ops.adapter_disable_int = aac_sa_disable_interrupt;
 367         dev->a_ops.adapter_enable_int = aac_sa_enable_interrupt;
 368         dev->a_ops.adapter_notify = aac_sa_notify_adapter;
 369         dev->a_ops.adapter_sync_cmd = sa_sync_cmd;
 370         dev->a_ops.adapter_check_health = aac_sa_check_health;
 371         dev->a_ops.adapter_intr = aac_sa_intr;
 372         dev->a_ops.adapter_ioremap = aac_sa_ioremap;
 373
 374         /*
 375          *      First clear out all interrupts.  Then enable the one's that
 376          *      we can handle.
 377          */
 378         aac_adapter_disable_int(dev);
 379         aac_adapter_enable_int(dev);
 380
 381         if(aac_init_adapter(dev) == NULL)
 382                 goto error_irq;
 383         if (request_irq(dev->scsi_host_ptr->irq, dev->a_ops.adapter_intr,
 384                         IRQF_SHARED|IRQF_DISABLED,
 385                         "aacraid", (void *)dev ) < 0) {
 386                 printk(KERN_WARNING "%s%d: Interrupt unavailable.\n",
 387                         name, instance);
 388                 goto error_iounmap;
 389         }
 390         aac_adapter_enable_int(dev);
 391
 392         /*
 393          *      Tell the adapter that all is configure, and it can start
 394          *      accepting requests
 395          */
 396         aac_sa_start_adapter(dev);
 397         return 0;
 398
 399 error_irq:
 400         aac_sa_disable_interrupt(dev);
 401         free_irq(dev->scsi_host_ptr->irq, (void *)dev);
 402
 403 error_iounmap:
 404
 405         return -1;
 406 }
 407