drivers/scsi/aacraid/sa.c

   1 /*
   2  *      Adaptec AAC series RAID controller driver
   3  *      (c) Copyright 2001 Red Hat Inc.
   4  *
   5  * based on the old aacraid driver that is..
   6  * Adaptec aacraid device driver for Linux.
   7  *
   8  * Copyright (c) 2000-2007 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/blkdev.h>
  37 #include <linux/delay.h>
  38 #include <linux/completion.h>
  39 #include <linux/time.h>
  40 #include <linux/interrupt.h>
  41
  42 #include <scsi/scsi_host.h>
  43
  44 #include "aacraid.h"
  45
  46 static irqreturn_t aac_sa_intr(int irq, void *dev_id)
  47 {
  48         struct aac_dev *dev = dev_id;
  49         unsigned short intstat, mask;
  50
  51         intstat = sa_readw(dev, DoorbellReg_p);
  52         /*
  53          *      Read mask and invert because drawbridge is reversed.
  54          *      This allows us to only service interrupts that have been enabled.
  55          */
  56         mask = ~(sa_readw(dev, SaDbCSR.PRISETIRQMASK));
  57
  58         /* Check to see if this is our interrupt.  If it isn't just return */
  59
  60         if (intstat & mask) {
  61                 if (intstat & PrintfReady) {
  62                         aac_printf(dev, sa_readl(dev, Mailbox5));
  63                         sa_writew(dev, DoorbellClrReg_p, PrintfReady); /* clear PrintfReady */
  64                         sa_writew(dev, DoorbellReg_s, PrintfDone);
  65                 } else if (intstat & DOORBELL_1) {      // dev -> Host Normal Command Ready
  66                         sa_writew(dev, DoorbellClrReg_p, DOORBELL_1);
  67                         aac_command_normal(&dev->queues->queue[HostNormCmdQueue]);
  68                 } else if (intstat & DOORBELL_2) {      // dev -> Host Normal Response Ready
  69                         sa_writew(dev, DoorbellClrReg_p, DOORBELL_2);
  70                         aac_response_normal(&dev->queues->queue[HostNormRespQueue]);
  71                 } else if (intstat & DOORBELL_3) {      // dev -> Host Normal Command Not Full
  72                         sa_writew(dev, DoorbellClrReg_p, DOORBELL_3);
  73                 } else if (intstat & DOORBELL_4) {      // dev -> Host Normal Response Not Full
  74                         sa_writew(dev, DoorbellClrReg_p, DOORBELL_4);
  75                 }
  76                 return IRQ_HANDLED;
  77         }
  78         return IRQ_NONE;
  79 }
  80
  81 /**
  82  *      aac_sa_disable_interrupt        -       disable interrupt
  83  *      @dev: Which adapter to enable.
  84  */
  85
  86 static void aac_sa_disable_interrupt (struct aac_dev *dev)
  87 {
  88         sa_writew(dev, SaDbCSR.PRISETIRQMASK, 0xffff);
  89 }
  90
  91 /**
  92  *      aac_sa_enable_interrupt -       enable interrupt
  93  *      @dev: Which adapter to enable.
  94  */
  95
  96 static void aac_sa_enable_interrupt (struct aac_dev *dev)
  97 {
  98         sa_writew(dev, SaDbCSR.PRICLEARIRQMASK, (PrintfReady | DOORBELL_1 |
  99                                 DOORBELL_2 | DOORBELL_3 | DOORBELL_4));
 100 }
 101
 102 /**
 103  *      aac_sa_notify_adapter           -       handle adapter notification
 104  *      @dev:   Adapter that notification is for
 105  *      @event: Event to notidy
 106  *
 107  *      Notify the adapter of an event
 108  */
 109
 110 static void aac_sa_notify_adapter(struct aac_dev *dev, u32 event)
 111 {
 112         switch (event) {
 113
 114         case AdapNormCmdQue:
 115                 sa_writew(dev, DoorbellReg_s,DOORBELL_1);
 116                 break;
 117         case HostNormRespNotFull:
 118                 sa_writew(dev, DoorbellReg_s,DOORBELL_4);
 119                 break;
 120         case AdapNormRespQue:
 121                 sa_writew(dev, DoorbellReg_s,DOORBELL_2);
 122                 break;
 123         case HostNormCmdNotFull:
 124                 sa_writew(dev, DoorbellReg_s,DOORBELL_3);
 125                 break;
 126         case HostShutdown:
 127                 /*
 128                 sa_sync_cmd(dev, HOST_CRASHING, 0, 0, 0, 0, 0, 0,
 129                 NULL, NULL, NULL, NULL, NULL);
 130                 */
 131                 break;
 132         case FastIo:
 133                 sa_writew(dev, DoorbellReg_s,DOORBELL_6);
 134                 break;
 135         case AdapPrintfDone:
 136                 sa_writew(dev, DoorbellReg_s,DOORBELL_5);
 137                 break;
 138         default:
 139                 BUG();
 140                 break;
 141         }
 142 }
 143
 144
 145 /**
 146  *      sa_sync_cmd     -       send a command and wait
 147  *      @dev: Adapter
 148  *      @command: Command to execute
 149  *      @p1: first parameter
 150  *      @ret: adapter status
 151  *
 152  *      This routine will send a synchronous command to the adapter and wait
 153  *      for its completion.
 154  */
 155
 156 static int sa_sync_cmd(struct aac_dev *dev, u32 command,
 157                 u32 p1, u32 p2, u32 p3, u32 p4, u32 p5, u32 p6,
 158                 u32 *ret, u32 *r1, u32 *r2, u32 *r3, u32 *r4)
 159 {
 160         unsigned long start;
 161         int ok;
 162         /*
 163          *      Write the Command into Mailbox 0
 164          */
 165         sa_writel(dev, Mailbox0, command);
 166         /*
 167          *      Write the parameters into Mailboxes 1 - 4
 168          */
 169         sa_writel(dev, Mailbox1, p1);
 170         sa_writel(dev, Mailbox2, p2);
 171         sa_writel(dev, Mailbox3, p3);
 172         sa_writel(dev, Mailbox4, p4);
 173
 174         /*
 175          *      Clear the synch command doorbell to start on a clean slate.
 176          */
 177         sa_writew(dev, DoorbellClrReg_p, DOORBELL_0);
 178         /*
 179          *      Signal that there is a new synch command
 180          */
 181         sa_writew(dev, DoorbellReg_s, DOORBELL_0);
 182
 183         ok = 0;
 184         start = jiffies;
 185
 186         while(time_before(jiffies, start+30*HZ))
 187         {
 188                 /*
 189                  *      Delay 5uS so that the monitor gets access
 190                  */
 191                 udelay(5);
 192                 /*
 193                  *      Mon110 will set doorbell0 bit when it has
 194                  *      completed the command.
 195                  */
 196                 if(sa_readw(dev, DoorbellReg_p) & DOORBELL_0)  {
 197                         ok = 1;
 198                         break;
 199                 }
 200                 msleep(1);
 201         }
 202
 203         if (ok != 1)
 204                 return -ETIMEDOUT;
 205         /*
 206          *      Clear the synch command doorbell.
 207          */
 208         sa_writew(dev, DoorbellClrReg_p, DOORBELL_0);
 209         /*
 210          *      Pull the synch status from Mailbox 0.
 211          */
 212         if (ret)
 213                 *ret = sa_readl(dev, Mailbox0);
 214         if (r1)
 215                 *r1 = sa_readl(dev, Mailbox1);
 216         if (r2)
 217                 *r2 = sa_readl(dev, Mailbox2);
 218         if (r3)
 219                 *r3 = sa_readl(dev, Mailbox3);
 220         if (r4)
 221                 *r4 = sa_readl(dev, Mailbox4);
 222         return 0;
 223 }
 224
 225 /**
 226  *      aac_sa_interrupt_adapter        -       interrupt an adapter
 227  *      @dev: Which adapter to enable.
 228  *
 229  *      Breakpoint an adapter.
 230  */
 231
 232 static void aac_sa_interrupt_adapter (struct aac_dev *dev)
 233 {
 234         sa_sync_cmd(dev, BREAKPOINT_REQUEST, 0, 0, 0, 0, 0, 0,
 235                         NULL, NULL, NULL, NULL, NULL);
 236 }
 237
 238 /**
 239  *      aac_sa_start_adapter            -       activate adapter
 240  *      @dev:   Adapter
 241  *
 242  *      Start up processing on an ARM based AAC adapter
 243  */
 244
 245 static void aac_sa_start_adapter(struct aac_dev *dev)
 246 {
 247         struct aac_init *init;
 248         /*
 249          * Fill in the remaining pieces of the init.
 250          */
 251         init = dev->init;
 252         init->HostElapsedSeconds = cpu_to_le32(get_seconds());
 253         /* We can only use a 32 bit address here */
 254         sa_sync_cmd(dev, INIT_STRUCT_BASE_ADDRESS,
 255                         (u32)(ulong)dev->init_pa, 0, 0, 0, 0, 0,
 256                         NULL, NULL, NULL, NULL, NULL);
 257 }
 258
 259 static int aac_sa_restart_adapter(struct aac_dev *dev, int bled)
 260 {
 261         return -EINVAL;
 262 }
 263
 264 /**
 265  *      aac_sa_check_health
 266  *      @dev: device to check if healthy
 267  *
 268  *      Will attempt to determine if the specified adapter is alive and
 269  *      capable of handling requests, returning 0 if alive.
 270  */
 271 static int aac_sa_check_health(struct aac_dev *dev)
 272 {
 273         long status = sa_readl(dev, Mailbox7);
 274
 275         /*
 276          *      Check to see if the board failed any self tests.
 277          */
 278         if (status & SELF_TEST_FAILED)
 279                 return -1;
 280         /*
 281          *      Check to see if the board panic'd while booting.
 282          */
 283         if (status & KERNEL_PANIC)
 284                 return -2;
 285         /*
 286          *      Wait for the adapter to be up and running. Wait up to 3 minutes
 287          */
 288         if (!(status & KERNEL_UP_AND_RUNNING))
 289                 return -3;
 290         /*
 291          *      Everything is OK
 292          */
 293         return 0;
 294 }
 295
 296 /**
 297  *      aac_sa_ioremap
 298  *      @size: mapping resize request
 299  *
 300  */
 301 static int aac_sa_ioremap(struct aac_dev * dev, u32 size)
 302 {
 303         if (!size) {
 304                 iounmap(dev->regs.sa);
 305                 return 0;
 306         }
 307         dev->base = dev->regs.sa = ioremap(dev->scsi_host_ptr->base, size);
 308         return (dev->base == NULL) ? -1 : 0;
 309 }
 310
 311 /**
 312  *      aac_sa_init     -       initialize an ARM based AAC card
 313  *      @dev: device to configure
 314  *
 315  *      Allocate and set up resources for the ARM based AAC variants. The
 316  *      device_interface in the commregion will be allocated and linked
 317  *      to the comm region.
 318  */
 319
 320 int aac_sa_init(struct aac_dev *dev)
 321 {
 322         unsigned long start;
 323         unsigned long status;
 324         int instance;
 325         const char *name;
 326
 327         instance = dev->id;
 328         name     = dev->name;
 329
 330         if (aac_sa_ioremap(dev, dev->base_size)) {
 331                 printk(KERN_WARNING "%s: unable to map adapter.\n", name);
 332                 goto error_iounmap;
 333         }
 334
 335         /*
 336          *      Check to see if the board failed any self tests.
 337          */
 338         if (sa_readl(dev, Mailbox7) & SELF_TEST_FAILED) {
 339                 printk(KERN_WARNING "%s%d: adapter self-test failed.\n", name, instance);
 340                 goto error_iounmap;
 341         }
 342         /*
 343          *      Check to see if the board panic'd while booting.
 344          */
 345         if (sa_readl(dev, Mailbox7) & KERNEL_PANIC) {
 346                 printk(KERN_WARNING "%s%d: adapter kernel panic'd.\n", name, instance);
 347                 goto error_iounmap;
 348         }
 349         start = jiffies;
 350         /*
 351          *      Wait for the adapter to be up and running. Wait up to 3 minutes.
 352          */
 353         while (!(sa_readl(dev, Mailbox7) & KERNEL_UP_AND_RUNNING)) {
 354                 if (time_after(jiffies, start+startup_timeout*HZ)) {
 355                         status = sa_readl(dev, Mailbox7);
 356                         printk(KERN_WARNING "%s%d: adapter kernel failed to start, init status = %lx.\n",
 357                                         name, instance, status);
 358                         goto error_iounmap;
 359                 }
 360                 msleep(1);
 361         }
 362
 363         /*
 364          *      Fill in the function dispatch table.
 365          */
 366
 367         dev->a_ops.adapter_interrupt = aac_sa_interrupt_adapter;
 368         dev->a_ops.adapter_disable_int = aac_sa_disable_interrupt;
 369         dev->a_ops.adapter_enable_int = aac_sa_enable_interrupt;
 370         dev->a_ops.adapter_notify = aac_sa_notify_adapter;
 371         dev->a_ops.adapter_sync_cmd = sa_sync_cmd;
 372         dev->a_ops.adapter_check_health = aac_sa_check_health;
 373         dev->a_ops.adapter_restart = aac_sa_restart_adapter;
 374         dev->a_ops.adapter_intr = aac_sa_intr;
 375         dev->a_ops.adapter_deliver = aac_rx_deliver_producer;
 376         dev->a_ops.adapter_ioremap = aac_sa_ioremap;
 377
 378         /*
 379          *      First clear out all interrupts.  Then enable the one's that
 380          *      we can handle.
 381          */
 382         aac_adapter_disable_int(dev);
 383         aac_adapter_enable_int(dev);
 384
 385         if(aac_init_adapter(dev) == NULL)
 386                 goto error_irq;
 387         if (request_irq(dev->pdev->irq, dev->a_ops.adapter_intr,
 388                         IRQF_SHARED|IRQF_DISABLED,
 389                         "aacraid", (void *)dev ) < 0) {
 390                 printk(KERN_WARNING "%s%d: Interrupt unavailable.\n",
 391                         name, instance);
 392                 goto error_iounmap;
 393         }
 394         aac_adapter_enable_int(dev);
 395
 396         /*
 397          *      Tell the adapter that all is configure, and it can start
 398          *      accepting requests
 399          */
 400         aac_sa_start_adapter(dev);
 401         return 0;
 402
 403 error_irq:
 404         aac_sa_disable_interrupt(dev);
 405         free_irq(dev->pdev->irq, (void *)dev);
 406
 407 error_iounmap:
 408
 409         return -1;
 410 }
 411