drivers/scsi/aic7xxx_proc.c

   1 /*+M*************************************************************************
   2  * Adaptec AIC7xxx device driver proc support for Linux.
   3  *
   4  * Copyright (c) 1995, 1996 Dean W. Gehnert
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2, or (at your option)
   9  * any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; see the file COPYING.  If not, write to
  18  * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
  19  *
  20  * ----------------------------------------------------------------
  21  *  o Modified from the EATA-DMA /proc support.
  22  *  o Additional support for device block statistics provided by
  23  *    Matthew Jacob.
  24  *  o Correction of overflow by Heinz Mauelshagen
  25  *  o Adittional corrections by Doug Ledford
  26  *
  27  *  Dean W. Gehnert, deang@teleport.com, 05/01/96
  28  *
  29  *  $Id: aic7xxx_proc.c,v 4.1 1997/06/97 08:23:42 deang Exp $
  30  *-M*************************************************************************/
  31
  32 #include <linux/config.h>
  33
  34 #define BLS     (&aic7xxx_buffer[size])
  35 #define HDRB \
  36 "             < 2K      2K+     4K+     8K+    16K+    32K+    64K+   128K+"
  37
  38 #ifdef PROC_DEBUG
  39 extern int vsprintf(char *, const char *, va_list);
  40
  41 static void
  42 proc_debug(const char *fmt, ...)
  43 {
  44   va_list ap;
  45   char buf[256];
  46
  47   va_start(ap, fmt);
  48   vsprintf(buf, fmt, ap);
  49   printk(buf);
  50   va_end(ap);
  51 }
  52 #else /* PROC_DEBUG */
  53 #  define proc_debug(fmt, args...)
  54 #endif /* PROC_DEBUG */
  55
  56 static int aic7xxx_buffer_size = 0;
  57 static char *aic7xxx_buffer = NULL;
  58
  59
  60 /*+F*************************************************************************
  61  * Function:
  62  *   aic7xxx_set_info
  63  *
  64  * Description:
  65  *   Set parameters for the driver from the /proc filesystem.
  66  *-F*************************************************************************/
  67 int
  68 aic7xxx_set_info(char *buffer, int length, struct Scsi_Host *HBAptr)
  69 {
  70   proc_debug("aic7xxx_set_info(): %s\n", buffer);
  71   return (-ENOSYS);  /* Currently this is a no-op */
  72 }
  73
  74
  75 /*+F*************************************************************************
  76  * Function:
  77  *   aic7xxx_proc_info
  78  *
  79  * Description:
  80  *   Return information to handle /proc support for the driver.
  81  *-F*************************************************************************/
  82 int
  83 aic7xxx_proc_info ( char *buffer, char **start, off_t offset, int length,
  84                     int hostno, int inout)
  85 {
  86   struct Scsi_Host *HBAptr;
  87   struct aic7xxx_host *p;
  88   int    size = 0;
  89   unsigned char i;
  90   struct aic7xxx_xferstats *sp;
  91   unsigned char target;
  92
  93   HBAptr = NULL;
  94
  95   for(p=first_aic7xxx; p->host->host_no != hostno; p=p->next)
  96     ;
  97
  98   if (!p)
  99   {
 100     size += sprintf(buffer, "Can't find adapter for host number %d\n", hostno);
 101     if (size > length)
 102     {
 103       return (size);
 104     }
 105     else
 106     {
 107       return (length);
 108     }
 109   }
 110
 111   HBAptr = p->host;
 112
 113   if (inout == TRUE) /* Has data been written to the file? */
 114   {
 115     return (aic7xxx_set_info(buffer, length, HBAptr));
 116   }
 117
 118   p = (struct aic7xxx_host *) HBAptr->hostdata;
 119
 120   /*
 121    * It takes roughly 1K of space to hold all relevant card info, not
 122    * counting any proc stats, so we start out with a 1.5k buffer size and
 123    * if proc_stats is defined, then we sweep the stats structure to see
 124    * how many drives we will be printing out for and add 384 bytes per
 125    * device with active stats.
 126    *
 127    * Hmmmm...that 1.5k seems to keep growing as items get added so they
 128    * can be easily viewed for debugging purposes.  So, we bumped that
 129    * 1.5k to 4k so we can quit having to bump it all the time.
 130    */
 131
 132   size = 4096;
 133   for (target = 0; target < MAX_TARGETS; target++)
 134   {
 135     if (p->dev_flags[target] & DEVICE_PRESENT)
 136 #ifdef AIC7XXX_PROC_STATS
 137       size += 512;
 138 #else
 139       size += 256;
 140 #endif
 141   }
 142   if (aic7xxx_buffer_size != size)
 143   {
 144     if (aic7xxx_buffer != NULL)
 145     {
 146       kfree(aic7xxx_buffer);
 147       aic7xxx_buffer_size = 0;
 148     }
 149     aic7xxx_buffer = kmalloc(size, GFP_KERNEL);
 150   }
 151   if (aic7xxx_buffer == NULL)
 152   {
 153     size = sprintf(buffer, "AIC7xxx - kmalloc error at line %d\n",
 154         __LINE__);
 155     return size;
 156   }
 157   aic7xxx_buffer_size = size;
 158
 159   size = 0;
 160   size += sprintf(BLS, "Adaptec AIC7xxx driver version: ");
 161   size += sprintf(BLS, "%s/", AIC7XXX_C_VERSION);
 162   size += sprintf(BLS, "%s", AIC7XXX_H_VERSION);
 163   size += sprintf(BLS, "\n");
 164   size += sprintf(BLS, "Compile Options:\n");
 165 #ifdef CONFIG_AIC7XXX_TCQ_ON_BY_DEFAULT
 166   size += sprintf(BLS, "  TCQ Enabled By Default : Enabled\n");
 167 #else
 168   size += sprintf(BLS, "  TCQ Enabled By Default : Disabled\n");
 169 #endif
 170 #ifdef AIC7XXX_PROC_STATS
 171   size += sprintf(BLS, "  AIC7XXX_PROC_STATS     : Enabled\n");
 172 #else
 173   size += sprintf(BLS, "  AIC7XXX_PROC_STATS     : Disabled\n");
 174 #endif
 175   size += sprintf(BLS, "\n");
 176   size += sprintf(BLS, "Adapter Configuration:\n");
 177   size += sprintf(BLS, "           SCSI Adapter: %s\n",
 178       board_names[p->board_name_index]);
 179   if (p->flags & AHC_TWIN)
 180     size += sprintf(BLS, "                         Twin Channel Controller ");
 181   else
 182   {
 183     char *channel = "";
 184     char *ultra = "";
 185     char *wide = "Narrow ";
 186     if (p->flags & AHC_MULTI_CHANNEL)
 187     {
 188       channel = " Channel A";
 189       if (p->flags & (AHC_CHNLB|AHC_CHNLC))
 190         channel = (p->flags & AHC_CHNLB) ? " Channel B" : " Channel C";
 191     }
 192     if (p->features & AHC_WIDE)
 193       wide = "Wide ";
 194     if (p->features & AHC_ULTRA3)
 195     {
 196       switch(p->chip & AHC_CHIPID_MASK)
 197       {
 198         case AHC_AIC7892:
 199         case AHC_AIC7899:
 200           ultra = "Ultra-160/m LVD/SE ";
 201           break;
 202         default:
 203           ultra = "Ultra-3 LVD/SE ";
 204           break;
 205       }
 206     }
 207     else if (p->features & AHC_ULTRA2)
 208       ultra = "Ultra-2 LVD/SE ";
 209     else if (p->features & AHC_ULTRA)
 210       ultra = "Ultra ";
 211     size += sprintf(BLS, "                           %s%sController%s ",
 212       ultra, wide, channel);
 213   }
 214   switch(p->chip & ~AHC_CHIPID_MASK)
 215   {
 216     case AHC_VL:
 217       size += sprintf(BLS, "at VLB slot %d\n", p->pci_device_fn);
 218       break;
 219     case AHC_EISA:
 220       size += sprintf(BLS, "at EISA slot %d\n", p->pci_device_fn);
 221       break;
 222     default:
 223       size += sprintf(BLS, "at PCI %d/%d/%d\n", p->pci_bus,
 224         PCI_SLOT(p->pci_device_fn), PCI_FUNC(p->pci_device_fn));
 225       break;
 226   }
 227   if( !(p->maddr) )
 228   {
 229     size += sprintf(BLS, "    Programmed I/O Base: %lx\n", p->base);
 230   }
 231   else
 232   {
 233     size += sprintf(BLS, "    PCI MMAPed I/O Base: 0x%lx\n", p->mbase);
 234   }
 235   if( (p->chip & (AHC_VL | AHC_EISA)) )
 236   {
 237     size += sprintf(BLS, "    BIOS Memory Address: 0x%08x\n", p->bios_address);
 238   }
 239   size += sprintf(BLS, " Adapter SEEPROM Config: %s\n",
 240           (p->flags & AHC_SEEPROM_FOUND) ? "SEEPROM found and used." :
 241          ((p->flags & AHC_USEDEFAULTS) ? "SEEPROM not found, using defaults." :
 242            "SEEPROM not found, using leftover BIOS values.") );
 243   size += sprintf(BLS, "      Adaptec SCSI BIOS: %s\n",
 244           (p->flags & AHC_BIOS_ENABLED) ? "Enabled" : "Disabled");
 245   size += sprintf(BLS, "                    IRQ: %d\n", HBAptr->irq);
 246   size += sprintf(BLS, "                   SCBs: Active %d, Max Active %d,\n",
 247             p->activescbs, p->max_activescbs);
 248   size += sprintf(BLS, "                         Allocated %d, HW %d, "
 249             "Page %d\n", p->scb_data->numscbs, p->scb_data->maxhscbs,
 250             p->scb_data->maxscbs);
 251   if (p->flags & AHC_EXTERNAL_SRAM)
 252     size += sprintf(BLS, "                         Using External SCB SRAM\n");
 253   size += sprintf(BLS, "             Interrupts: %ld", p->isr_count);
 254   if (p->chip & AHC_EISA)
 255   {
 256     size += sprintf(BLS, " %s\n",
 257         (p->pause & IRQMS) ? "(Level Sensitive)" : "(Edge Triggered)");
 258   }
 259   else
 260   {
 261     size += sprintf(BLS, "\n");
 262   }
 263   size += sprintf(BLS, "      BIOS Control Word: 0x%04x\n",
 264             p->bios_control);
 265   size += sprintf(BLS, "   Adapter Control Word: 0x%04x\n",
 266             p->adapter_control);
 267   size += sprintf(BLS, "   Extended Translation: %sabled\n",
 268       (p->flags & AHC_EXTEND_TRANS_A) ? "En" : "Dis");
 269   size += sprintf(BLS, "Disconnect Enable Flags: 0x%04x\n", p->discenable);
 270   if (p->features & (AHC_ULTRA | AHC_ULTRA2))
 271   {
 272     size += sprintf(BLS, "     Ultra Enable Flags: 0x%04x\n", p->ultraenb);
 273   }
 274   size += sprintf(BLS, " Tag Queue Enable Flags: 0x%04x\n", p->tagenable);
 275   size += sprintf(BLS, "Ordered Queue Tag Flags: 0x%04x\n", p->orderedtag);
 276   size += sprintf(BLS, "Default Tag Queue Depth: %d\n", AIC7XXX_CMDS_PER_DEVICE);
 277   size += sprintf(BLS, "    Tagged Queue By Device array for aic7xxx host "
 278                        "instance %d:\n", p->instance);
 279   size += sprintf(BLS, "      {");
 280   for(i=0; i < (MAX_TARGETS - 1); i++)
 281     size += sprintf(BLS, "%d,",aic7xxx_tag_info[p->instance].tag_commands[i]);
 282   size += sprintf(BLS, "%d}\n",aic7xxx_tag_info[p->instance].tag_commands[i]);
 283   size += sprintf(BLS, "    Actual queue depth per device for aic7xxx host "
 284                        "instance %d:\n", p->instance);
 285   size += sprintf(BLS, "      {");
 286   for(i=0; i < (MAX_TARGETS - 1); i++)
 287     size += sprintf(BLS, "%d,", p->dev_max_queue_depth[i]);
 288   size += sprintf(BLS, "%d}\n", p->dev_max_queue_depth[i]);
 289
 290   size += sprintf(BLS, "\n");
 291   size += sprintf(BLS, "Statistics:\n\n");
 292   for (target = 0; target < MAX_TARGETS; target++)
 293   {
 294     sp = &p->stats[target];
 295     if ((p->dev_flags[target] & DEVICE_PRESENT) == 0)
 296     {
 297       continue;
 298     }
 299     if (p->features & AHC_TWIN)
 300     {
 301       size += sprintf(BLS, "(scsi%d:%d:%d:%d)\n",
 302           p->host_no, (target >> 3), (target & 0x7), 0);
 303     }
 304     else
 305     {
 306       size += sprintf(BLS, "(scsi%d:%d:%d:%d)\n",
 307           p->host_no, 0, target, 0);
 308     }
 309     size += sprintf(BLS, "  Device using %s/%s",
 310           (p->transinfo[target].cur_width == MSG_EXT_WDTR_BUS_16_BIT) ?
 311           "Wide" : "Narrow",
 312           (p->transinfo[target].cur_offset != 0) ?
 313           "Sync transfers at " : "Async transfers.\n" );
 314     if (p->transinfo[target].cur_offset != 0)
 315     {
 316       struct aic7xxx_syncrate *sync_rate;
 317       unsigned char options = p->transinfo[target].cur_options;
 318       int period = p->transinfo[target].cur_period;
 319       int rate = (p->transinfo[target].cur_width ==
 320                   MSG_EXT_WDTR_BUS_16_BIT) ? 1 : 0;
 321
 322       sync_rate = aic7xxx_find_syncrate(p, &period, 0, &options);
 323       if (sync_rate != NULL)
 324       {
 325         size += sprintf(BLS, "%s MByte/sec, offset %d\n",
 326                         sync_rate->rate[rate],
 327                         p->transinfo[target].cur_offset );
 328       }
 329       else
 330       {
 331         size += sprintf(BLS, "3.3 MByte/sec, offset %d\n",
 332                         p->transinfo[target].cur_offset );
 333       }
 334     }
 335     size += sprintf(BLS, "  Transinfo settings: ");
 336     size += sprintf(BLS, "current(%d/%d/%d/%d), ",
 337                     p->transinfo[target].cur_period,
 338                     p->transinfo[target].cur_offset,
 339                     p->transinfo[target].cur_width,
 340                     p->transinfo[target].cur_options);
 341     size += sprintf(BLS, "goal(%d/%d/%d/%d), ",
 342                     p->transinfo[target].goal_period,
 343                     p->transinfo[target].goal_offset,
 344                     p->transinfo[target].goal_width,
 345                     p->transinfo[target].goal_options);
 346     size += sprintf(BLS, "user(%d/%d/%d/%d)\n",
 347                     p->transinfo[target].user_period,
 348                     p->transinfo[target].user_offset,
 349                     p->transinfo[target].user_width,
 350                     p->transinfo[target].user_options);
 351 #ifdef AIC7XXX_PROC_STATS
 352     size += sprintf(BLS, "  Total transfers %ld (%ld reads and %ld writes)\n",
 353         sp->r_total + sp->w_total, sp->r_total, sp->w_total);
 354     size += sprintf(BLS, "%s\n", HDRB);
 355     size += sprintf(BLS, "   Reads:");
 356     for (i = 0; i < NUMBER(sp->r_bins); i++)
 357     {
 358       size += sprintf(BLS, " %7ld", sp->r_bins[i]);
 359     }
 360     size += sprintf(BLS, "\n");
 361     size += sprintf(BLS, "  Writes:");
 362     for (i = 0; i < NUMBER(sp->w_bins); i++)
 363     {
 364       size += sprintf(BLS, " %7ld", sp->w_bins[i]);
 365     }
 366     size += sprintf(BLS, "\n");
 367 #else
 368     size += sprintf(BLS, "  Total transfers %ld (%ld reads and %ld writes)\n",
 369         sp->r_total + sp->w_total, sp->r_total, sp->w_total);
 370 #endif /* AIC7XXX_PROC_STATS */
 371     size += sprintf(BLS, "\n\n");
 372   }
 373
 374   if (size >= aic7xxx_buffer_size)
 375   {
 376     printk(KERN_WARNING "aic7xxx: Overflow in aic7xxx_proc.c\n");
 377   }
 378
 379   if (offset > size - 1)
 380   {
 381     kfree(aic7xxx_buffer);
 382     aic7xxx_buffer = NULL;
 383     aic7xxx_buffer_size = length = 0;
 384     *start = NULL;
 385   }
 386   else
 387   {
 388     *start = buffer;
 389     length = MIN(length, size - offset);
 390     memcpy(buffer, &aic7xxx_buffer[offset], length);
 391   }
 392
 393   return (length);
 394 }
 395
 396 /*
 397  * Overrides for Emacs so that we follow Linus's tabbing style.
 398  * Emacs will notice this stuff at the end of the file and automatically
 399  * adjust the settings for this buffer only.  This must remain at the end
 400  * of the file.
 401  * ---------------------------------------------------------------------------
 402  * Local variables:
 403  * c-indent-level: 2
 404  * c-brace-imaginary-offset: 0
 405  * c-brace-offset: -2
 406  * c-argdecl-indent: 2
 407  * c-label-offset: -2
 408  * c-continued-statement-offset: 2
 409  * c-continued-brace-offset: 0
 410  * indent-tabs-mode: nil
 411  * tab-width: 8
 412  * End:
 413  */