drivers/scsi/aacraid/rx.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  *  rx.c
  26  *
  27  * Abstract: Hardware miniport for Drawbridge specific hardware 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_rx_intr(int irq, void *dev_id, struct pt_regs *regs)
  50 {
  51         struct aac_dev *dev = dev_id;
  52         unsigned long bellbits;
  53         u8 intstat, mask;
  54         intstat = rx_readb(dev, MUnit.OISR);
  55         /*
  56          *      Read mask and invert because drawbridge is reversed.
  57          *      This allows us to only service interrupts that have
  58          *      been enabled.
  59          */
  60         mask = ~(dev->OIMR);
  61         /* Check to see if this is our interrupt.  If it isn't just return */
  62         if (intstat & mask)
  63         {
  64                 bellbits = rx_readl(dev, OutboundDoorbellReg);
  65                 if (bellbits & DoorBellPrintfReady) {
  66                         aac_printf(dev, le32_to_cpu(rx_readl (dev, IndexRegs.Mailbox[5])));
  67                         rx_writel(dev, MUnit.ODR,DoorBellPrintfReady);
  68                         rx_writel(dev, InboundDoorbellReg,DoorBellPrintfDone);
  69                 }
  70                 else if (bellbits & DoorBellAdapterNormCmdReady) {
  71                         rx_writel(dev, MUnit.ODR, DoorBellAdapterNormCmdReady);
  72                         aac_command_normal(&dev->queues->queue[HostNormCmdQueue]);
  73                 }
  74                 else if (bellbits & DoorBellAdapterNormRespReady) {
  75                         aac_response_normal(&dev->queues->queue[HostNormRespQueue]);
  76                         rx_writel(dev, MUnit.ODR,DoorBellAdapterNormRespReady);
  77                 }
  78                 else if (bellbits & DoorBellAdapterNormCmdNotFull) {
  79                         rx_writel(dev, MUnit.ODR, DoorBellAdapterNormCmdNotFull);
  80                 }
  81                 else if (bellbits & DoorBellAdapterNormRespNotFull) {
  82                         rx_writel(dev, MUnit.ODR, DoorBellAdapterNormCmdNotFull);
  83                         rx_writel(dev, MUnit.ODR, DoorBellAdapterNormRespNotFull);
  84                 }
  85                 return IRQ_HANDLED;
  86         }
  87         return IRQ_NONE;
  88 }
  89
  90 /**
  91  *      rx_sync_cmd     -       send a command and wait
  92  *      @dev: Adapter
  93  *      @command: Command to execute
  94  *      @p1: first parameter
  95  *      @ret: adapter status
  96  *
  97  *      This routine will send a synchronous command to the adapter and wait
  98  *      for its completion.
  99  */
 100
 101 static int rx_sync_cmd(struct aac_dev *dev, u32 command, u32 p1, u32 *status)
 102 {
 103         unsigned long start;
 104         int ok;
 105         /*
 106          *      Write the command into Mailbox 0
 107          */
 108         rx_writel(dev, InboundMailbox0, command);
 109         /*
 110          *      Write the parameters into Mailboxes 1 - 4
 111          */
 112         rx_writel(dev, InboundMailbox1, p1);
 113         rx_writel(dev, InboundMailbox2, 0);
 114         rx_writel(dev, InboundMailbox3, 0);
 115         rx_writel(dev, InboundMailbox4, 0);
 116         /*
 117          *      Clear the synch command doorbell to start on a clean slate.
 118          */
 119         rx_writel(dev, OutboundDoorbellReg, OUTBOUNDDOORBELL_0);
 120         /*
 121          *      Disable doorbell interrupts
 122          */
 123         rx_writeb(dev, MUnit.OIMR, dev->OIMR |= 0x04);
 124         /*
 125          *      Force the completion of the mask register write before issuing
 126          *      the interrupt.
 127          */
 128         rx_readb (dev, MUnit.OIMR);
 129         /*
 130          *      Signal that there is a new synch command
 131          */
 132         rx_writel(dev, InboundDoorbellReg, INBOUNDDOORBELL_0);
 133
 134         ok = 0;
 135         start = jiffies;
 136
 137         /*
 138          *      Wait up to 30 seconds
 139          */
 140         while (time_before(jiffies, start+30*HZ))
 141         {
 142                 udelay(5);      /* Delay 5 microseconds to let Mon960 get info. */
 143                 /*
 144                  *      Mon960 will set doorbell0 bit when it has completed the command.
 145                  */
 146                 if (rx_readl(dev, OutboundDoorbellReg) & OUTBOUNDDOORBELL_0) {
 147                         /*
 148                          *      Clear the doorbell.
 149                          */
 150                         rx_writel(dev, OutboundDoorbellReg, OUTBOUNDDOORBELL_0);
 151                         ok = 1;
 152                         break;
 153                 }
 154                 /*
 155                  *      Yield the processor in case we are slow
 156                  */
 157                 set_current_state(TASK_UNINTERRUPTIBLE);
 158                 schedule_timeout(1);
 159         }
 160         if (ok != 1) {
 161                 /*
 162                  *      Restore interrupt mask even though we timed out
 163                  */
 164                 rx_writeb(dev, MUnit.OIMR, dev->OIMR &= 0xfb);
 165                 return -ETIMEDOUT;
 166         }
 167         /*
 168          *      Pull the synch status from Mailbox 0.
 169          */
 170         if (status)
 171                 *status = rx_readl(dev, IndexRegs.Mailbox[0]);
 172         /*
 173          *      Clear the synch command doorbell.
 174          */
 175         rx_writel(dev, OutboundDoorbellReg, OUTBOUNDDOORBELL_0);
 176         /*
 177          *      Restore interrupt mask
 178          */
 179         rx_writeb(dev, MUnit.OIMR, dev->OIMR &= 0xfb);
 180         return 0;
 181
 182 }
 183
 184 /**
 185  *      aac_rx_interrupt_adapter        -       interrupt adapter
 186  *      @dev: Adapter
 187  *
 188  *      Send an interrupt to the i960 and breakpoint it.
 189  */
 190
 191 static void aac_rx_interrupt_adapter(struct aac_dev *dev)
 192 {
 193         u32 ret;
 194         rx_sync_cmd(dev, BREAKPOINT_REQUEST, 0, &ret);
 195 }
 196
 197 /**
 198  *      aac_rx_notify_adapter           -       send an event to the adapter
 199  *      @dev: Adapter
 200  *      @event: Event to send
 201  *
 202  *      Notify the i960 that something it probably cares about has
 203  *      happened.
 204  */
 205
 206 static void aac_rx_notify_adapter(struct aac_dev *dev, u32 event)
 207 {
 208         switch (event) {
 209
 210         case AdapNormCmdQue:
 211                 rx_writel(dev, MUnit.IDR,INBOUNDDOORBELL_1);
 212                 break;
 213         case HostNormRespNotFull:
 214                 rx_writel(dev, MUnit.IDR,INBOUNDDOORBELL_4);
 215                 break;
 216         case AdapNormRespQue:
 217                 rx_writel(dev, MUnit.IDR,INBOUNDDOORBELL_2);
 218                 break;
 219         case HostNormCmdNotFull:
 220                 rx_writel(dev, MUnit.IDR,INBOUNDDOORBELL_3);
 221                 break;
 222         case HostShutdown:
 223 //              rx_sync_cmd(dev, HOST_CRASHING, 0, 0, 0, 0, &ret);
 224                 break;
 225         case FastIo:
 226                 rx_writel(dev, MUnit.IDR,INBOUNDDOORBELL_6);
 227                 break;
 228         case AdapPrintfDone:
 229                 rx_writel(dev, MUnit.IDR,INBOUNDDOORBELL_5);
 230                 break;
 231         default:
 232                 BUG();
 233                 break;
 234         }
 235 }
 236
 237 /**
 238  *      aac_rx_start_adapter            -       activate adapter
 239  *      @dev:   Adapter
 240  *
 241  *      Start up processing on an i960 based AAC adapter
 242  */
 243
 244 static void aac_rx_start_adapter(struct aac_dev *dev)
 245 {
 246         u32 status;
 247         struct aac_init *init;
 248
 249         init = dev->init;
 250         init->HostElapsedSeconds = cpu_to_le32(get_seconds());
 251         /*
 252          *      Tell the adapter we are back and up and running so it will scan
 253          *      its command queues and enable our interrupts
 254          */
 255         dev->irq_mask = (DoorBellPrintfReady | OUTBOUNDDOORBELL_1 | OUTBOUNDDOORBELL_2 | OUTBOUNDDOORBELL_3 | OUTBOUNDDOORBELL_4);
 256         /*
 257          *      First clear out all interrupts.  Then enable the one's that we
 258          *      can handle.
 259          */
 260         rx_writeb(dev, MUnit.OIMR, 0xff);
 261         rx_writel(dev, MUnit.ODR, 0xffffffff);
 262 //      rx_writeb(dev, MUnit.OIMR, ~(u8)OUTBOUND_DOORBELL_INTERRUPT_MASK);
 263         rx_writeb(dev, MUnit.OIMR, dev->OIMR = 0xfb);
 264
 265         // We can only use a 32 bit address here
 266         rx_sync_cmd(dev, INIT_STRUCT_BASE_ADDRESS, (u32)(ulong)dev->init_pa, &status);
 267 }
 268
 269 /**
 270  *      aac_rx_check_health
 271  *      @dev: device to check if healthy
 272  *
 273  *      Will attempt to determine if the specified adapter is alive and
 274  *      capable of handling requests, returning 0 if alive.
 275  */
 276 static int aac_rx_check_health(struct aac_dev *dev)
 277 {
 278         u32 status = rx_readl(dev, MUnit.OMRx[0]);
 279
 280         /*
 281          *      Check to see if the board failed any self tests.
 282          */
 283         if (status & SELF_TEST_FAILED)
 284                 return -1;
 285         /*
 286          *      Check to see if the board panic'd.
 287          */
 288         if (status & KERNEL_PANIC) {
 289                 char * buffer;
 290                 struct POSTSTATUS {
 291                         u32 Post_Command;
 292                         u32 Post_Address;
 293                 } * post;
 294                 dma_addr_t paddr, baddr;
 295                 int ret;
 296
 297                 if ((status & 0xFF000000L) == 0xBC000000L)
 298                         return (status >> 16) & 0xFF;
 299                 buffer = pci_alloc_consistent(dev->pdev, 512, &baddr);
 300                 ret = -2;
 301                 if (buffer == NULL)
 302                         return ret;
 303                 post = pci_alloc_consistent(dev->pdev,
 304                   sizeof(struct POSTSTATUS), &paddr);
 305                 if (post == NULL) {
 306                         pci_free_consistent(dev->pdev, 512, buffer, baddr);
 307                         return ret;
 308                 }
 309                 memset(buffer, 0, 512);
 310                 post->Post_Command = cpu_to_le32(COMMAND_POST_RESULTS);
 311                 post->Post_Address = cpu_to_le32(baddr);
 312                 rx_writel(dev, MUnit.IMRx[0], paddr);
 313                 rx_sync_cmd(dev, COMMAND_POST_RESULTS, baddr, &status);
 314                 pci_free_consistent(dev->pdev, sizeof(struct POSTSTATUS),
 315                   post, paddr);
 316                 if ((buffer[0] == '0') && (buffer[1] == 'x')) {
 317                         ret = (buffer[2] <= '9') ? (buffer[2] - '0') : (buffer[2] - 'A' + 10);
 318                         ret <<= 4;
 319                         ret += (buffer[3] <= '9') ? (buffer[3] - '0') : (buffer[3] - 'A' + 10);
 320                 }
 321                 pci_free_consistent(dev->pdev, 512, buffer, baddr);
 322                 return ret;
 323         }
 324         /*
 325          *      Wait for the adapter to be up and running.
 326          */
 327         if (!(status & KERNEL_UP_AND_RUNNING))
 328                 return -3;
 329         /*
 330          *      Everything is OK
 331          */
 332         return 0;
 333 }
 334
 335 /**
 336  *      aac_rx_init     -       initialize an i960 based AAC card
 337  *      @dev: device to configure
 338  *
 339  *      Allocate and set up resources for the i960 based AAC variants. The
 340  *      device_interface in the commregion will be allocated and linked
 341  *      to the comm region.
 342  */
 343
 344 int aac_rx_init(struct aac_dev *dev)
 345 {
 346         unsigned long start;
 347         unsigned long status;
 348         int instance;
 349         const char * name;
 350
 351         instance = dev->id;
 352         name     = dev->name;
 353
 354         /*
 355          *      Map in the registers from the adapter.
 356          */
 357         if((dev->regs.rx = ioremap((unsigned long)dev->scsi_host_ptr->base, 8192))==NULL)
 358         {
 359                 printk(KERN_WARNING "aacraid: unable to map i960.\n" );
 360                 return -1;
 361         }
 362         /*
 363          *      Check to see if the board failed any self tests.
 364          */
 365         if (rx_readl(dev, MUnit.OMRx[0]) & SELF_TEST_FAILED) {
 366                 printk(KERN_ERR "%s%d: adapter self-test failed.\n", dev->name, instance);
 367                 goto error_iounmap;
 368         }
 369         /*
 370          *      Check to see if the board panic'd while booting.
 371          */
 372         if (rx_readl(dev, MUnit.OMRx[0]) & KERNEL_PANIC) {
 373                 printk(KERN_ERR "%s%d: adapter kernel panic.\n", dev->name, instance);
 374                 goto error_iounmap;
 375         }
 376         /*
 377          *      Check to see if the monitor panic'd while booting.
 378          */
 379         if (rx_readl(dev, MUnit.OMRx[0]) & MONITOR_PANIC) {
 380                 printk(KERN_ERR "%s%d: adapter monitor panic.\n", dev->name, instance);
 381                 goto error_iounmap;
 382         }
 383         start = jiffies;
 384         /*
 385          *      Wait for the adapter to be up and running. Wait up to 3 minutes
 386          */
 387         while ((!(rx_readl(dev, IndexRegs.Mailbox[7]) & KERNEL_UP_AND_RUNNING))
 388                 || (!(rx_readl(dev, MUnit.OMRx[0]) & KERNEL_UP_AND_RUNNING)))
 389         {
 390                 if(time_after(jiffies, start+180*HZ))
 391                 {
 392                         status = rx_readl(dev, IndexRegs.Mailbox[7]);
 393                         printk(KERN_ERR "%s%d: adapter kernel failed to start, init status = %lx.\n",
 394                                         dev->name, instance, status);
 395                         goto error_iounmap;
 396                 }
 397                 set_current_state(TASK_UNINTERRUPTIBLE);
 398                 schedule_timeout(1);
 399         }
 400         if (request_irq(dev->scsi_host_ptr->irq, aac_rx_intr, SA_SHIRQ|SA_INTERRUPT, "aacraid", (void *)dev)<0)
 401         {
 402                 printk(KERN_ERR "%s%d: Interrupt unavailable.\n", name, instance);
 403                 goto error_iounmap;
 404         }
 405         /*
 406          *      Fill in the function dispatch table.
 407          */
 408         dev->a_ops.adapter_interrupt = aac_rx_interrupt_adapter;
 409         dev->a_ops.adapter_notify = aac_rx_notify_adapter;
 410         dev->a_ops.adapter_sync_cmd = rx_sync_cmd;
 411         dev->a_ops.adapter_check_health = aac_rx_check_health;
 412
 413         if (aac_init_adapter(dev) == NULL)
 414                 goto error_irq;
 415         /*
 416          *      Start any kernel threads needed
 417          */
 418         dev->thread_pid = kernel_thread((int (*)(void *))aac_command_thread, dev, 0);
 419         if(dev->thread_pid < 0)
 420         {
 421                 printk(KERN_ERR "aacraid: Unable to create rx thread.\n");
 422                 goto error_kfree;
 423         }
 424         /*
 425          *      Tell the adapter that all is configured, and it can start
 426          *      accepting requests
 427          */
 428         aac_rx_start_adapter(dev);
 429         return 0;
 430
 431 error_kfree:
 432         kfree(dev->queues);
 433
 434 error_irq:
 435         free_irq(dev->scsi_host_ptr->irq, (void *)dev);
 436
 437 error_iounmap:
 438         iounmap(dev->regs.rx);
 439
 440         return -1;
 441 }