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, 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,
 102         u32 p1, u32 p2, u32 p3, u32 p4, u32 p5, u32 p6,
 103         u32 *status, u32 * r1, u32 * r2, u32 * r3, u32 * r4)
 104 {
 105         unsigned long start;
 106         int ok;
 107         /*
 108          *      Write the command into Mailbox 0
 109          */
 110         rx_writel(dev, InboundMailbox0, command);
 111         /*
 112          *      Write the parameters into Mailboxes 1 - 6
 113          */
 114         rx_writel(dev, InboundMailbox1, p1);
 115         rx_writel(dev, InboundMailbox2, p2);
 116         rx_writel(dev, InboundMailbox3, p3);
 117         rx_writel(dev, InboundMailbox4, p4);
 118         /*
 119          *      Clear the synch command doorbell to start on a clean slate.
 120          */
 121         rx_writel(dev, OutboundDoorbellReg, OUTBOUNDDOORBELL_0);
 122         /*
 123          *      Disable doorbell interrupts
 124          */
 125         rx_writeb(dev, MUnit.OIMR, dev->OIMR = 0xff);
 126         /*
 127          *      Force the completion of the mask register write before issuing
 128          *      the interrupt.
 129          */
 130         rx_readb (dev, MUnit.OIMR);
 131         /*
 132          *      Signal that there is a new synch command
 133          */
 134         rx_writel(dev, InboundDoorbellReg, INBOUNDDOORBELL_0);
 135
 136         ok = 0;
 137         start = jiffies;
 138
 139         /*
 140          *      Wait up to 30 seconds
 141          */
 142         while (time_before(jiffies, start+30*HZ))
 143         {
 144                 udelay(5);      /* Delay 5 microseconds to let Mon960 get info. */
 145                 /*
 146                  *      Mon960 will set doorbell0 bit when it has completed the command.
 147                  */
 148                 if (rx_readl(dev, OutboundDoorbellReg) & OUTBOUNDDOORBELL_0) {
 149                         /*
 150                          *      Clear the doorbell.
 151                          */
 152                         rx_writel(dev, OutboundDoorbellReg, OUTBOUNDDOORBELL_0);
 153                         ok = 1;
 154                         break;
 155                 }
 156                 /*
 157                  *      Yield the processor in case we are slow
 158                  */
 159                 set_current_state(TASK_UNINTERRUPTIBLE);
 160                 schedule_timeout(1);
 161         }
 162         if (ok != 1) {
 163                 /*
 164                  *      Restore interrupt mask even though we timed out
 165                  */
 166                 rx_writeb(dev, MUnit.OIMR, dev->OIMR &= 0xfb);
 167                 return -ETIMEDOUT;
 168         }
 169         /*
 170          *      Pull the synch status from Mailbox 0.
 171          */
 172         if (status)
 173                 *status = rx_readl(dev, IndexRegs.Mailbox[0]);
 174         if (r1)
 175                 *r1 = rx_readl(dev, IndexRegs.Mailbox[1]);
 176         if (r2)
 177                 *r2 = rx_readl(dev, IndexRegs.Mailbox[2]);
 178         if (r3)
 179                 *r3 = rx_readl(dev, IndexRegs.Mailbox[3]);
 180         if (r4)
 181                 *r4 = rx_readl(dev, IndexRegs.Mailbox[4]);
 182         /*
 183          *      Clear the synch command doorbell.
 184          */
 185         rx_writel(dev, OutboundDoorbellReg, OUTBOUNDDOORBELL_0);
 186         /*
 187          *      Restore interrupt mask
 188          */
 189         rx_writeb(dev, MUnit.OIMR, dev->OIMR &= 0xfb);
 190         return 0;
 191
 192 }
 193
 194 /**
 195  *      aac_rx_interrupt_adapter        -       interrupt adapter
 196  *      @dev: Adapter
 197  *
 198  *      Send an interrupt to the i960 and breakpoint it.
 199  */
 200
 201 static void aac_rx_interrupt_adapter(struct aac_dev *dev)
 202 {
 203         rx_sync_cmd(dev, BREAKPOINT_REQUEST, 0, 0, 0, 0, 0, 0, NULL, NULL, NULL, NULL, NULL);
 204 }
 205
 206 /**
 207  *      aac_rx_notify_adapter           -       send an event to the adapter
 208  *      @dev: Adapter
 209  *      @event: Event to send
 210  *
 211  *      Notify the i960 that something it probably cares about has
 212  *      happened.
 213  */
 214
 215 static void aac_rx_notify_adapter(struct aac_dev *dev, u32 event)
 216 {
 217         switch (event) {
 218
 219         case AdapNormCmdQue:
 220                 rx_writel(dev, MUnit.IDR,INBOUNDDOORBELL_1);
 221                 break;
 222         case HostNormRespNotFull:
 223                 rx_writel(dev, MUnit.IDR,INBOUNDDOORBELL_4);
 224                 break;
 225         case AdapNormRespQue:
 226                 rx_writel(dev, MUnit.IDR,INBOUNDDOORBELL_2);
 227                 break;
 228         case HostNormCmdNotFull:
 229                 rx_writel(dev, MUnit.IDR,INBOUNDDOORBELL_3);
 230                 break;
 231         case HostShutdown:
 232 //              rx_sync_cmd(dev, HOST_CRASHING, 0, 0, 0, 0, 0, 0,
 233 //                NULL, NULL, NULL, NULL, NULL);
 234                 break;
 235         case FastIo:
 236                 rx_writel(dev, MUnit.IDR,INBOUNDDOORBELL_6);
 237                 break;
 238         case AdapPrintfDone:
 239                 rx_writel(dev, MUnit.IDR,INBOUNDDOORBELL_5);
 240                 break;
 241         default:
 242                 BUG();
 243                 break;
 244         }
 245 }
 246
 247 /**
 248  *      aac_rx_start_adapter            -       activate adapter
 249  *      @dev:   Adapter
 250  *
 251  *      Start up processing on an i960 based AAC adapter
 252  */
 253
 254 static void aac_rx_start_adapter(struct aac_dev *dev)
 255 {
 256         struct aac_init *init;
 257
 258         init = dev->init;
 259         init->HostElapsedSeconds = cpu_to_le32(get_seconds());
 260         /*
 261          *      First clear out all interrupts.  Then enable the one's that we
 262          *      can handle.
 263          */
 264         rx_writeb(dev, MUnit.OIMR, 0xff);
 265         rx_writel(dev, MUnit.ODR, 0xffffffff);
 266 //      rx_writeb(dev, MUnit.OIMR, ~(u8)OUTBOUND_DOORBELL_INTERRUPT_MASK);
 267         rx_writeb(dev, MUnit.OIMR, dev->OIMR = 0xfb);
 268
 269         // We can only use a 32 bit address here
 270         rx_sync_cmd(dev, INIT_STRUCT_BASE_ADDRESS, (u32)(ulong)dev->init_pa,
 271           0, 0, 0, 0, 0, NULL, NULL, NULL, NULL, NULL);
 272 }
 273
 274 /**
 275  *      aac_rx_check_health
 276  *      @dev: device to check if healthy
 277  *
 278  *      Will attempt to determine if the specified adapter is alive and
 279  *      capable of handling requests, returning 0 if alive.
 280  */
 281 static int aac_rx_check_health(struct aac_dev *dev)
 282 {
 283         u32 status = rx_readl(dev, MUnit.OMRx[0]);
 284
 285         /*
 286          *      Check to see if the board failed any self tests.
 287          */
 288         if (status & SELF_TEST_FAILED)
 289                 return -1;
 290         /*
 291          *      Check to see if the board panic'd.
 292          */
 293         if (status & KERNEL_PANIC) {
 294                 char * buffer;
 295                 struct POSTSTATUS {
 296                         __le32 Post_Command;
 297                         __le32 Post_Address;
 298                 } * post;
 299                 dma_addr_t paddr, baddr;
 300                 int ret;
 301
 302                 if ((status & 0xFF000000L) == 0xBC000000L)
 303                         return (status >> 16) & 0xFF;
 304                 buffer = pci_alloc_consistent(dev->pdev, 512, &baddr);
 305                 ret = -2;
 306                 if (buffer == NULL)
 307                         return ret;
 308                 post = pci_alloc_consistent(dev->pdev,
 309                   sizeof(struct POSTSTATUS), &paddr);
 310                 if (post == NULL) {
 311                         pci_free_consistent(dev->pdev, 512, buffer, baddr);
 312                         return ret;
 313                 }
 314                 memset(buffer, 0, 512);
 315                 post->Post_Command = cpu_to_le32(COMMAND_POST_RESULTS);
 316                 post->Post_Address = cpu_to_le32(baddr);
 317                 rx_writel(dev, MUnit.IMRx[0], paddr);
 318                 rx_sync_cmd(dev, COMMAND_POST_RESULTS, baddr, 0, 0, 0, 0, 0,
 319                   NULL, NULL, NULL, NULL, NULL);
 320                 pci_free_consistent(dev->pdev, sizeof(struct POSTSTATUS),
 321                   post, paddr);
 322                 if ((buffer[0] == '0') && (buffer[1] == 'x')) {
 323                         ret = (buffer[2] <= '9') ? (buffer[2] - '0') : (buffer[2] - 'A' + 10);
 324                         ret <<= 4;
 325                         ret += (buffer[3] <= '9') ? (buffer[3] - '0') : (buffer[3] - 'A' + 10);
 326                 }
 327                 pci_free_consistent(dev->pdev, 512, buffer, baddr);
 328                 return ret;
 329         }
 330         /*
 331          *      Wait for the adapter to be up and running.
 332          */
 333         if (!(status & KERNEL_UP_AND_RUNNING))
 334                 return -3;
 335         /*
 336          *      Everything is OK
 337          */
 338         return 0;
 339 }
 340
 341 /**
 342  *      aac_rx_init     -       initialize an i960 based AAC card
 343  *      @dev: device to configure
 344  *
 345  *      Allocate and set up resources for the i960 based AAC variants. The
 346  *      device_interface in the commregion will be allocated and linked
 347  *      to the comm region.
 348  */
 349
 350 int aac_rx_init(struct aac_dev *dev)
 351 {
 352         unsigned long start;
 353         unsigned long status;
 354         int instance;
 355         const char * name;
 356
 357         instance = dev->id;
 358         name     = dev->name;
 359
 360         /*
 361          *      Map in the registers from the adapter.
 362          */
 363         if((dev->regs.rx = ioremap((unsigned long)dev->scsi_host_ptr->base, 8192))==NULL)
 364         {
 365                 printk(KERN_WARNING "aacraid: unable to map i960.\n" );
 366                 return -1;
 367         }
 368         /*
 369          *      Check to see if the board failed any self tests.
 370          */
 371         if (rx_readl(dev, MUnit.OMRx[0]) & SELF_TEST_FAILED) {
 372                 printk(KERN_ERR "%s%d: adapter self-test failed.\n", dev->name, instance);
 373                 goto error_iounmap;
 374         }
 375         /*
 376          *      Check to see if the board panic'd while booting.
 377          */
 378         if (rx_readl(dev, MUnit.OMRx[0]) & KERNEL_PANIC) {
 379                 printk(KERN_ERR "%s%d: adapter kernel panic.\n", dev->name, instance);
 380                 goto error_iounmap;
 381         }
 382         /*
 383          *      Check to see if the monitor panic'd while booting.
 384          */
 385         if (rx_readl(dev, MUnit.OMRx[0]) & MONITOR_PANIC) {
 386                 printk(KERN_ERR "%s%d: adapter monitor panic.\n", dev->name, instance);
 387                 goto error_iounmap;
 388         }
 389         start = jiffies;
 390         /*
 391          *      Wait for the adapter to be up and running. Wait up to 3 minutes
 392          */
 393         while ((!(rx_readl(dev, IndexRegs.Mailbox[7]) & KERNEL_UP_AND_RUNNING))
 394                 || (!(rx_readl(dev, MUnit.OMRx[0]) & KERNEL_UP_AND_RUNNING)))
 395         {
 396                 if(time_after(jiffies, start+180*HZ))
 397                 {
 398                         status = rx_readl(dev, IndexRegs.Mailbox[7]);
 399                         printk(KERN_ERR "%s%d: adapter kernel failed to start, init status = %lx.\n",
 400                                         dev->name, instance, status);
 401                         goto error_iounmap;
 402                 }
 403                 set_current_state(TASK_UNINTERRUPTIBLE);
 404                 schedule_timeout(1);
 405         }
 406         if (request_irq(dev->scsi_host_ptr->irq, aac_rx_intr, SA_SHIRQ|SA_INTERRUPT, "aacraid", (void *)dev)<0)
 407         {
 408                 printk(KERN_ERR "%s%d: Interrupt unavailable.\n", name, instance);
 409                 goto error_iounmap;
 410         }
 411         /*
 412          *      Fill in the function dispatch table.
 413          */
 414         dev->a_ops.adapter_interrupt = aac_rx_interrupt_adapter;
 415         dev->a_ops.adapter_notify = aac_rx_notify_adapter;
 416         dev->a_ops.adapter_sync_cmd = rx_sync_cmd;
 417         dev->a_ops.adapter_check_health = aac_rx_check_health;
 418
 419         if (aac_init_adapter(dev) == NULL)
 420                 goto error_irq;
 421         /*
 422          *      Start any kernel threads needed
 423          */
 424         dev->thread_pid = kernel_thread((int (*)(void *))aac_command_thread, dev, 0);
 425         if(dev->thread_pid < 0)
 426         {
 427                 printk(KERN_ERR "aacraid: Unable to create rx thread.\n");
 428                 goto error_kfree;
 429         }
 430         /*
 431          *      Tell the adapter that all is configured, and it can start
 432          *      accepting requests
 433          */
 434         aac_rx_start_adapter(dev);
 435         return 0;
 436
 437 error_kfree:
 438         kfree(dev->queues);
 439
 440 error_irq:
 441         free_irq(dev->scsi_host_ptr->irq, (void *)dev);
 442
 443 error_iounmap:
 444         iounmap(dev->regs.rx);
 445
 446         return -1;
 447 }