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/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
  43 #include <scsi/scsi_host.h>
  44
  45 #include "aacraid.h"
  46
  47 static irqreturn_t aac_sa_intr(int irq, void *dev_id)
  48 {
  49         struct aac_dev *dev = dev_id;
  50         unsigned short intstat, mask;
  51
  52         intstat = sa_readw(dev, DoorbellReg_p);
  53         /*
  54          *      Read mask and invert because drawbridge is reversed.
  55          *      This allows us to only service interrupts that have been enabled.
  56          */
  57         mask = ~(sa_readw(dev, SaDbCSR.PRISETIRQMASK));
  58
  59         /* Check to see if this is our interrupt.  If it isn't just return */
  60
  61         if (intstat & mask) {
  62                 if (intstat & PrintfReady) {
  63                         aac_printf(dev, sa_readl(dev, Mailbox5));
  64                         sa_writew(dev, DoorbellClrReg_p, PrintfReady); /* clear PrintfReady */
  65                         sa_writew(dev, DoorbellReg_s, PrintfDone);
  66                 } else if (intstat & DOORBELL_1) {      // dev -> Host Normal Command Ready
  67                         sa_writew(dev, DoorbellClrReg_p, DOORBELL_1);
  68                         aac_command_normal(&dev->queues->queue[HostNormCmdQueue]);
  69                 } else if (intstat & DOORBELL_2) {      // dev -> Host Normal Response Ready
  70                         sa_writew(dev, DoorbellClrReg_p, DOORBELL_2);
  71                         aac_response_normal(&dev->queues->queue[HostNormRespQueue]);
  72                 } else if (intstat & DOORBELL_3) {      // dev -> Host Normal Command Not Full
  73                         sa_writew(dev, DoorbellClrReg_p, DOORBELL_3);
  74                 } else if (intstat & DOORBELL_4) {      // dev -> Host Normal Response Not Full
  75                         sa_writew(dev, DoorbellClrReg_p, DOORBELL_4);
  76                 }
  77                 return IRQ_HANDLED;
  78         }
  79         return IRQ_NONE;
  80 }
  81
  82 /**
  83  *      aac_sa_disable_interrupt        -       disable interrupt
  84  *      @dev: Which adapter to enable.
  85  */
  86
  87 static void aac_sa_disable_interrupt (struct aac_dev *dev)
  88 {
  89         sa_writew(dev, SaDbCSR.PRISETIRQMASK, 0xffff);
  90 }
  91
  92 /**
  93  *      aac_sa_enable_interrupt -       enable interrupt
  94  *      @dev: Which adapter to enable.
  95  */
  96
  97 static void aac_sa_enable_interrupt (struct aac_dev *dev)
  98 {
  99         sa_writew(dev, SaDbCSR.PRICLEARIRQMASK, (PrintfReady | DOORBELL_1 |
 100                                 DOORBELL_2 | DOORBELL_3 | DOORBELL_4));
 101 }
 102
 103 /**
 104  *      aac_sa_notify_adapter           -       handle adapter notification
 105  *      @dev:   Adapter that notification is for
 106  *      @event: Event to notidy
 107  *
 108  *      Notify the adapter of an event
 109  */
 110
 111 static void aac_sa_notify_adapter(struct aac_dev *dev, u32 event)
 112 {
 113         switch (event) {
 114
 115         case AdapNormCmdQue:
 116                 sa_writew(dev, DoorbellReg_s,DOORBELL_1);
 117                 break;
 118         case HostNormRespNotFull:
 119                 sa_writew(dev, DoorbellReg_s,DOORBELL_4);
 120                 break;
 121         case AdapNormRespQue:
 122                 sa_writew(dev, DoorbellReg_s,DOORBELL_2);
 123                 break;
 124         case HostNormCmdNotFull:
 125                 sa_writew(dev, DoorbellReg_s,DOORBELL_3);
 126                 break;
 127         case HostShutdown:
 128                 /*
 129                 sa_sync_cmd(dev, HOST_CRASHING, 0, 0, 0, 0, 0, 0,
 130                 NULL, NULL, NULL, NULL, NULL);
 131                 */
 132                 break;
 133         case FastIo:
 134                 sa_writew(dev, DoorbellReg_s,DOORBELL_6);
 135                 break;
 136         case AdapPrintfDone:
 137                 sa_writew(dev, DoorbellReg_s,DOORBELL_5);
 138                 break;
 139         default:
 140                 BUG();
 141                 break;
 142         }
 143 }
 144
 145
 146 /**
 147  *      sa_sync_cmd     -       send a command and wait
 148  *      @dev: Adapter
 149  *      @command: Command to execute
 150  *      @p1: first parameter
 151  *      @ret: adapter status
 152  *
 153  *      This routine will send a synchronous command to the adapter and wait
 154  *      for its completion.
 155  */
 156
 157 static int sa_sync_cmd(struct aac_dev *dev, u32 command,
 158                 u32 p1, u32 p2, u32 p3, u32 p4, u32 p5, u32 p6,
 159                 u32 *ret, u32 *r1, u32 *r2, u32 *r3, u32 *r4)
 160 {
 161         unsigned long start;
 162         int ok;
 163         /*
 164          *      Write the Command into Mailbox 0
 165          */
 166         sa_writel(dev, Mailbox0, command);
 167         /*
 168          *      Write the parameters into Mailboxes 1 - 4
 169          */
 170         sa_writel(dev, Mailbox1, p1);
 171         sa_writel(dev, Mailbox2, p2);
 172         sa_writel(dev, Mailbox3, p3);
 173         sa_writel(dev, Mailbox4, p4);
 174
 175         /*
 176          *      Clear the synch command doorbell to start on a clean slate.
 177          */
 178         sa_writew(dev, DoorbellClrReg_p, DOORBELL_0);
 179         /*
 180          *      Signal that there is a new synch command
 181          */
 182         sa_writew(dev, DoorbellReg_s, DOORBELL_0);
 183
 184         ok = 0;
 185         start = jiffies;
 186
 187         while(time_before(jiffies, start+30*HZ))
 188         {
 189                 /*
 190                  *      Delay 5uS so that the monitor gets access
 191                  */
 192                 udelay(5);
 193                 /*
 194                  *      Mon110 will set doorbell0 bit when it has
 195                  *      completed the command.
 196                  */
 197                 if(sa_readw(dev, DoorbellReg_p) & DOORBELL_0)  {
 198                         ok = 1;
 199                         break;
 200                 }
 201                 msleep(1);
 202         }
 203
 204         if (ok != 1)
 205                 return -ETIMEDOUT;
 206         /*
 207          *      Clear the synch command doorbell.
 208          */
 209         sa_writew(dev, DoorbellClrReg_p, DOORBELL_0);
 210         /*
 211          *      Pull the synch status from Mailbox 0.
 212          */
 213         if (ret)
 214                 *ret = sa_readl(dev, Mailbox0);
 215         if (r1)
 216                 *r1 = sa_readl(dev, Mailbox1);
 217         if (r2)
 218                 *r2 = sa_readl(dev, Mailbox2);
 219         if (r3)
 220                 *r3 = sa_readl(dev, Mailbox3);
 221         if (r4)
 222                 *r4 = sa_readl(dev, Mailbox4);
 223         return 0;
 224 }
 225
 226 /**
 227  *      aac_sa_interrupt_adapter        -       interrupt an adapter
 228  *      @dev: Which adapter to enable.
 229  *
 230  *      Breakpoint an adapter.
 231  */
 232
 233 static void aac_sa_interrupt_adapter (struct aac_dev *dev)
 234 {
 235         sa_sync_cmd(dev, BREAKPOINT_REQUEST, 0, 0, 0, 0, 0, 0,
 236                         NULL, NULL, NULL, NULL, NULL);
 237 }
 238
 239 /**
 240  *      aac_sa_start_adapter            -       activate adapter
 241  *      @dev:   Adapter
 242  *
 243  *      Start up processing on an ARM based AAC adapter
 244  */
 245
 246 static void aac_sa_start_adapter(struct aac_dev *dev)
 247 {
 248         struct aac_init *init;
 249         /*
 250          * Fill in the remaining pieces of the init.
 251          */
 252         init = dev->init;
 253         init->HostElapsedSeconds = cpu_to_le32(get_seconds());
 254         /* We can only use a 32 bit address here */
 255         sa_sync_cmd(dev, INIT_STRUCT_BASE_ADDRESS,
 256                         (u32)(ulong)dev->init_pa, 0, 0, 0, 0, 0,
 257                         NULL, NULL, NULL, NULL, NULL);
 258 }
 259
 260 static int aac_sa_restart_adapter(struct aac_dev *dev, int bled)
 261 {
 262         return -EINVAL;
 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_ioremap
 299  *      @size: mapping resize request
 300  *
 301  */
 302 static int aac_sa_ioremap(struct aac_dev * dev, u32 size)
 303 {
 304         if (!size) {
 305                 iounmap(dev->regs.sa);
 306                 return 0;
 307         }
 308         dev->base = dev->regs.sa = ioremap(dev->scsi_host_ptr->base, size);
 309         return (dev->base == NULL) ? -1 : 0;
 310 }
 311
 312 /**
 313  *      aac_sa_init     -       initialize an ARM based AAC card
 314  *      @dev: device to configure
 315  *
 316  *      Allocate and set up resources for the ARM based AAC variants. The
 317  *      device_interface in the commregion will be allocated and linked
 318  *      to the comm region.
 319  */
 320
 321 int aac_sa_init(struct aac_dev *dev)
 322 {
 323         unsigned long start;
 324         unsigned long status;
 325         int instance;
 326         const char *name;
 327
 328         instance = dev->id;
 329         name     = dev->name;
 330
 331         if (aac_sa_ioremap(dev, dev->base_size)) {
 332                 printk(KERN_WARNING "%s: unable to map adapter.\n", name);
 333                 goto error_iounmap;
 334         }
 335
 336         /*
 337          *      Check to see if the board failed any self tests.
 338          */
 339         if (sa_readl(dev, Mailbox7) & SELF_TEST_FAILED) {
 340                 printk(KERN_WARNING "%s%d: adapter self-test failed.\n", name, instance);
 341                 goto error_iounmap;
 342         }
 343         /*
 344          *      Check to see if the board panic'd while booting.
 345          */
 346         if (sa_readl(dev, Mailbox7) & KERNEL_PANIC) {
 347                 printk(KERN_WARNING "%s%d: adapter kernel panic'd.\n", name, instance);
 348                 goto error_iounmap;
 349         }
 350         start = jiffies;
 351         /*
 352          *      Wait for the adapter to be up and running. Wait up to 3 minutes.
 353          */
 354         while (!(sa_readl(dev, Mailbox7) & KERNEL_UP_AND_RUNNING)) {
 355                 if (time_after(jiffies, start+startup_timeout*HZ)) {
 356                         status = sa_readl(dev, Mailbox7);
 357                         printk(KERN_WARNING "%s%d: adapter kernel failed to start, init status = %lx.\n",
 358                                         name, instance, status);
 359                         goto error_iounmap;
 360                 }
 361                 msleep(1);
 362         }
 363
 364         /*
 365          *      Fill in the function dispatch table.
 366          */
 367
 368         dev->a_ops.adapter_interrupt = aac_sa_interrupt_adapter;
 369         dev->a_ops.adapter_disable_int = aac_sa_disable_interrupt;
 370         dev->a_ops.adapter_enable_int = aac_sa_enable_interrupt;
 371         dev->a_ops.adapter_notify = aac_sa_notify_adapter;
 372         dev->a_ops.adapter_sync_cmd = sa_sync_cmd;
 373         dev->a_ops.adapter_check_health = aac_sa_check_health;
 374         dev->a_ops.adapter_restart = aac_sa_restart_adapter;
 375         dev->a_ops.adapter_intr = aac_sa_intr;
 376         dev->a_ops.adapter_deliver = aac_rx_deliver_producer;
 377         dev->a_ops.adapter_ioremap = aac_sa_ioremap;
 378
 379         /*
 380          *      First clear out all interrupts.  Then enable the one's that
 381          *      we can handle.
 382          */
 383         aac_adapter_disable_int(dev);
 384         aac_adapter_enable_int(dev);
 385
 386         if(aac_init_adapter(dev) == NULL)
 387                 goto error_irq;
 388         if (request_irq(dev->pdev->irq, dev->a_ops.adapter_intr,
 389                         IRQF_SHARED|IRQF_DISABLED,
 390                         "aacraid", (void *)dev ) < 0) {
 391                 printk(KERN_WARNING "%s%d: Interrupt unavailable.\n",
 392                         name, instance);
 393                 goto error_iounmap;
 394         }
 395         aac_adapter_enable_int(dev);
 396
 397         /*
 398          *      Tell the adapter that all is configure, and it can start
 399          *      accepting requests
 400          */
 401         aac_sa_start_adapter(dev);
 402         return 0;
 403
 404 error_irq:
 405         aac_sa_disable_interrupt(dev);
 406         free_irq(dev->pdev->irq, (void *)dev);
 407
 408 error_iounmap:
 409
 410         return -1;
 411 }
 412