misc/aspi.c

   1 #include <stdlib.h>
   2 #include <stdio.h>
   3 #include <sys/types.h>
   4 #include <sys/stat.h>
   5 #include <errno.h>
   6 #include <fcntl.h>
   7 #include <ldt.h>
   8 #include <memory.h>
   9 #include <unistd.h>
  10 #include <callback.h>
  11 #include "windows.h"
  12 #include "aspi.h"
  13 #include "options.h"
  14 #include "heap.h"
  15 #include "debug.h"
  16 #include "stddebug.h"
  17
  18 /* FIXME!
  19  * 1) Residual byte length reporting not handled
  20  * 2) Make this code re-entrant for multithreading
  21  * 3) Only linux supported so far
  22  */
  23
  24 #ifdef linux
  25
  26 /* This is a duplicate of the sg_header from /usr/src/linux/include/scsi/sg.h
  27  * kernel 2.0.30
  28  * This will probably break at some point, but for those who don't have
  29  * kernels installed, I think this should still work.
  30  *
  31  */
  32
  33 struct sg_header
  34  {
  35   int pack_len;    /* length of incoming packet <4096 (including header) */
  36   int reply_len;   /* maximum length <4096 of expected reply */
  37   int pack_id;     /* id number of packet */
  38   int result;      /* 0==ok, otherwise refer to errno codes */
  39   unsigned int twelve_byte:1; /* Force 12 byte command length for group 6 & 7 commands  */
  40   unsigned int other_flags:31;                  /* for future use */
  41   unsigned char sense_buffer[16]; /* used only by reads */
  42   /* command follows then data for command */
  43  };
  44
  45 #define SCSI_OFF sizeof(struct sg_header)
  46 #endif
  47
  48 #define ASPI_POSTING(prb) (prb->SRB_Flags & 0x1)
  49
  50 #define HOST_TO_TARGET(prb) (((prb->SRB_Flags>>3) & 0x3) == 0x2)
  51 #define TARGET_TO_HOST(prb) (((prb->SRB_Flags>>3) & 0x3) == 0x1)
  52 #define NO_DATA_TRANSFERED(prb) (((prb->SRB_Flags>>3) & 0x3) == 0x3)
  53
  54 #define SRB_ENABLE_RESIDUAL_COUNT 0x4
  55
  56 #define INQUIRY_VENDOR          8
  57
  58 #define MUSTEK_SCSI_AREA_AND_WINDOWS 0x04
  59 #define MUSTEK_SCSI_READ_SCANNED_DATA 0x08
  60 #define MUSTEK_SCSI_GET_IMAGE_STATUS 0x0f
  61 #define MUSTEK_SCSI_ADF_AND_BACKTRACE 0x10
  62 #define MUSTEK_SCSI_CCD_DISTANCE 0x11
  63 #define MUSTEK_SCSI_START_STOP 0x1b
  64
  65 #define CMD_TEST_UNIT_READY 0x00
  66 #define CMD_REQUEST_SENSE 0x03
  67 #define CMD_INQUIRY 0x12
  68
  69 /* scanner commands - just for debug */
  70 #define CMD_SCAN_GET_DATA_BUFFER_STATUS 0x34
  71 #define CMD_SCAN_GET_WINDOW 0x25
  72 #define CMD_SCAN_OBJECT_POSITION 0x31
  73 #define CMD_SCAN_READ 0x28
  74 #define CMD_SCAN_RELEASE_UNIT 0x17
  75 #define CMD_SCAN_RESERVE_UNIT 0x16
  76 #define CMD_SCAN_SCAN 0x1b
  77 #define CMD_SCAN_SEND 0x2a
  78 #define CMD_SCAN_CHANGE_DEFINITION 0x40
  79
  80 #define INQURIY_CMDLEN 6
  81 #define INQURIY_REPLY_LEN 96
  82 #define INQUIRY_VENDOR 8
  83
  84 #define SENSE_BUFFER(prb) (&prb->CDBByte[prb->SRB_CDBLen])
  85
  86
  87 /* Just a container for seeing what devices are open */
  88 struct ASPI_DEVICE_INFO {
  89     struct ASPI_DEVICE_INFO *   next;
  90     int                         fd;
  91     int                         hostId;
  92     int                         target;
  93     int                         lun;
  94 };
  95
  96 typedef struct ASPI_DEVICE_INFO ASPI_DEVICE_INFO;
  97 static ASPI_DEVICE_INFO *ASPI_open_devices = NULL;
  98
  99 #ifdef linux
 100 static int
 101 ASPI_OpenDevice16(SRB_ExecSCSICmd16 *prb)
 102 {
 103     int fd;
 104     char        idstr[20];
 105     char        device_str[50];
 106     ASPI_DEVICE_INFO *curr;
 107
 108     /* search list of devices to see if we've opened it already.
 109      * There is not an explicit open/close in ASPI land, so hopefully
 110      * keeping a device open won't be a problem.
 111      */
 112
 113     for (curr = ASPI_open_devices; curr; curr = curr->next) {
 114         if (curr->hostId == prb->SRB_HaId &&
 115             curr->target == prb->SRB_Target &&
 116             curr->lun == prb->SRB_Lun) {
 117             return curr->fd;
 118         }
 119     }
 120
 121     /* device wasn't cached, go ahead and open it */
 122     sprintf(idstr, "scsi c%1dt%1dd%1d", prb->SRB_HaId, prb->SRB_Target, prb->SRB_Lun);
 123
 124     if (!PROFILE_GetWineIniString(idstr, "Device", "", device_str, sizeof(device_str))) {
 125         dprintf_aspi(stddeb, "Trying to open unlisted scsi device %s\n", idstr);
 126         return -1;
 127     }
 128
 129     dprintf_aspi(stddeb, "Opening device %s=%s\n", idstr, device_str);
 130
 131     fd = open(device_str, O_RDWR);
 132     if (fd == -1) {
 133         int save_error = errno;
 134         dprintf_aspi(stddeb, "Error opening device errno=%d\n", save_error);
 135         return -1;
 136     }
 137
 138     /* device is now open */
 139     curr = HeapAlloc( SystemHeap, 0, sizeof(ASPI_DEVICE_INFO) );
 140     curr->fd = fd;
 141     curr->hostId = prb->SRB_HaId;
 142     curr->target = prb->SRB_Target;
 143     curr->lun = prb->SRB_Lun;
 144
 145     /* insert new record at beginning of open device list */
 146     curr->next = ASPI_open_devices;
 147     ASPI_open_devices = curr;
 148     return fd;
 149 }
 150
 151
 152 static void
 153 ASPI_DebugPrintCmd16(SRB_ExecSCSICmd16 *prb)
 154 {
 155   BYTE  cmd;
 156   int   i;
 157   BYTE *cdb;
 158   BYTE *lpBuf;
 159
 160   lpBuf = PTR_SEG_TO_LIN(prb->SRB_BufPointer);
 161
 162   switch (prb->CDBByte[0]) {
 163   case CMD_INQUIRY:
 164     dprintf_aspi(stddeb, "{\n");
 165     dprintf_aspi(stddeb, "\tEVPD: %d\n", prb->CDBByte[1] & 1);
 166     dprintf_aspi(stddeb, "\tLUN: %d\n", (prb->CDBByte[1] & 0xc) >> 1);
 167     dprintf_aspi(stddeb, "\tPAGE CODE: %d\n", prb->CDBByte[2]);
 168     dprintf_aspi(stddeb, "\tALLOCATION LENGTH: %d\n", prb->CDBByte[4]);
 169     dprintf_aspi(stddeb, "\tCONTROL: %d\n", prb->CDBByte[5]);
 170     dprintf_aspi(stddeb, "}\n");
 171     break;
 172   case CMD_SCAN_SCAN:
 173     dprintf_aspi(stddeb, "Transfer Length: %d\n", prb->CDBByte[4]);
 174     break;
 175   }
 176
 177   dprintf_aspi(stddeb, "Host Adapter: %d\n", prb->SRB_HaId);
 178   dprintf_aspi(stddeb, "Flags: %d\n", prb->SRB_Flags);
 179   if (TARGET_TO_HOST(prb)) {
 180     dprintf_aspi(stddeb, "\tData transfer: Target to host. Length checked.\n");
 181   }
 182   else if (HOST_TO_TARGET(prb)) {
 183     dprintf_aspi(stddeb, "\tData transfer: Host to target. Length checked.\n");
 184   }
 185   else if (NO_DATA_TRANSFERED(prb)) {
 186     dprintf_aspi(stddeb, "\tData transfer: none\n");
 187   }
 188   else {
 189     dprintf_aspi(stddeb, "\tTransfer by scsi cmd. Length not checked\n");
 190   }
 191
 192   dprintf_aspi(stddeb, "\tResidual byte length reporting %s\n", prb->SRB_Flags & 0x4 ? "enabled" : "disabled");
 193   dprintf_aspi(stddeb, "\tLinking %s\n", prb->SRB_Flags & 0x2 ? "enabled" : "disabled");
 194   dprintf_aspi(stddeb, "\tPosting %s\n", prb->SRB_Flags & 0x1 ? "enabled" : "disabled");
 195   dprintf_aspi(stddeb, "Target: %d\n", prb->SRB_Target);
 196   dprintf_aspi(stddeb, "Lun: %d\n", prb->SRB_Lun);
 197   dprintf_aspi(stddeb, "BufLen: %ld\n", prb->SRB_BufLen);
 198   dprintf_aspi(stddeb, "SenseLen: %d\n", prb->SRB_SenseLen);
 199   dprintf_aspi(stddeb, "BufPtr: %lx (%p)\n", prb->SRB_BufPointer, lpBuf);
 200   dprintf_aspi(stddeb, "LinkPointer %lx\n", prb->SRB_Rsvd1);
 201   dprintf_aspi(stddeb, "CDB Length: %d\n", prb->SRB_CDBLen);
 202   dprintf_aspi(stddeb, "POST Proc: %lx\n", (DWORD) prb->SRB_PostProc);
 203   cdb = &prb->CDBByte[0];
 204   dprintf_aspi(stddeb, "CDB buffer[");
 205   cmd = prb->CDBByte[0];
 206   for (i = 0; i < prb->SRB_CDBLen; i++) {
 207     if (i != 0)
 208       dprintf_aspi(stddeb, ",");
 209     dprintf_aspi(stddeb, "%02x", *cdb++);
 210   }
 211   dprintf_aspi(stddeb, "]\n");
 212 }
 213
 214 static void
 215 PrintSenseArea16(SRB_ExecSCSICmd16 *prb)
 216 {
 217   int   i;
 218   BYTE *cdb;
 219
 220   cdb = &prb->CDBByte[0];
 221   dprintf_aspi(stddeb, "SenseArea[");
 222   for (i = 0; i < prb->SRB_SenseLen; i++) {
 223     if (i)
 224       dprintf_aspi(stddeb, ",");
 225     dprintf_aspi(stddeb, "%02x", *cdb++);
 226   }
 227   dprintf_aspi(stddeb, "]\n");
 228 }
 229
 230 static void
 231 ASPI_DebugPrintResult16(SRB_ExecSCSICmd16 *prb)
 232 {
 233   BYTE *lpBuf;
 234
 235   lpBuf = PTR_SEG_TO_LIN(prb->SRB_BufPointer);
 236
 237   switch (prb->CDBByte[0]) {
 238   case CMD_INQUIRY:
 239     dprintf_aspi(stddeb, "Vendor: %s\n", lpBuf + INQUIRY_VENDOR);
 240     break;
 241   case CMD_TEST_UNIT_READY:
 242     PrintSenseArea16(prb);
 243     break;
 244   }
 245 }
 246
 247 static WORD
 248 ASPI_ExecScsiCmd16(SRB_ExecSCSICmd16 *prb, SEGPTR segptr_prb)
 249 {
 250   struct sg_header *sg_hd, *sg_reply_hdr;
 251   int   status;
 252   BYTE *lpBuf;
 253   int   in_len, out_len;
 254   int   error_code = 0;
 255   int   fd;
 256
 257   ASPI_DebugPrintCmd16(prb);
 258
 259   fd = ASPI_OpenDevice16(prb);
 260   if (fd == -1) {
 261       prb->SRB_Status = SS_ERR;
 262       return SS_ERR;
 263   }
 264
 265   sg_hd = NULL;
 266   sg_reply_hdr = NULL;
 267
 268   prb->SRB_Status = SS_PENDING;
 269   lpBuf = PTR_SEG_TO_LIN(prb->SRB_BufPointer);
 270
 271   if (!prb->SRB_CDBLen) {
 272       prb->SRB_Status = SS_ERR;
 273       return SS_ERR;
 274   }
 275
 276   /* build up sg_header + scsi cmd */
 277   if (HOST_TO_TARGET(prb)) {
 278     /* send header, command, and then data */
 279     in_len = SCSI_OFF + prb->SRB_CDBLen + prb->SRB_BufLen;
 280     sg_hd = (struct sg_header *) malloc(in_len);
 281     memset(sg_hd, 0, SCSI_OFF);
 282     memcpy(sg_hd + 1, &prb->CDBByte[0], prb->SRB_CDBLen);
 283     if (prb->SRB_BufLen) {
 284       memcpy(((BYTE *) sg_hd) + SCSI_OFF + prb->SRB_CDBLen, lpBuf, prb->SRB_BufLen);
 285     }
 286   }
 287   else {
 288     /* send header and command - no data */
 289     in_len = SCSI_OFF + prb->SRB_CDBLen;
 290     sg_hd = (struct sg_header *) malloc(in_len);
 291     memset(sg_hd, 0, SCSI_OFF);
 292     memcpy(sg_hd + 1, &prb->CDBByte[0], prb->SRB_CDBLen);
 293   }
 294
 295   if (TARGET_TO_HOST(prb)) {
 296     out_len = SCSI_OFF + prb->SRB_BufLen;
 297     sg_reply_hdr = (struct sg_header *) malloc(out_len);
 298     memset(sg_reply_hdr, 0, SCSI_OFF);
 299     sg_hd->reply_len = out_len;
 300   }
 301   else {
 302     out_len = SCSI_OFF;
 303     sg_reply_hdr = (struct sg_header *) malloc(out_len);
 304     memset(sg_reply_hdr, 0, SCSI_OFF);
 305     sg_hd->reply_len = out_len;
 306   }
 307
 308   status = write(fd, sg_hd, in_len);
 309   if (status < 0 || status != in_len) {
 310       int myerror = errno;
 311
 312     fprintf(stderr, "not enough bytes written to scsi device bytes=%d .. %d\n", in_len, status);
 313     if (status < 0) {
 314         if (myerror == ENOMEM) {
 315             fprintf(stderr, "ASPI: Linux generic scsi driver\n  You probably need to re-compile your kernel with a larger SG_BIG_BUFF value (sg.h)\n  Suggest 130560\n");
 316         }
 317         dprintf_aspi(stddeb, "errno: = %d\n", myerror);
 318     }
 319     goto error_exit;
 320   }
 321
 322   status = read(fd, sg_reply_hdr, out_len);
 323   if (status < 0 || status != out_len) {
 324     dprintf_aspi(stddeb, "not enough bytes read from scsi device%d\n", status);
 325     goto error_exit;
 326   }
 327
 328   if (sg_reply_hdr->result != 0) {
 329     error_code = sg_reply_hdr->result;
 330     dprintf_aspi(stddeb, "reply header error (%d)\n", sg_reply_hdr->result);
 331     goto error_exit;
 332   }
 333
 334   if (TARGET_TO_HOST(prb) && prb->SRB_BufLen) {
 335     memcpy(lpBuf, sg_reply_hdr + 1, prb->SRB_BufLen);
 336   }
 337
 338   /* copy in sense buffer to amount that is available in client */
 339   if (prb->SRB_SenseLen) {
 340     int sense_len = prb->SRB_SenseLen;
 341     if (prb->SRB_SenseLen > 16)
 342       sense_len = 16;
 343     memcpy(SENSE_BUFFER(prb), &sg_reply_hdr->sense_buffer[0], sense_len);
 344   }
 345
 346
 347   prb->SRB_Status = SS_COMP;
 348   prb->SRB_HaStat = HASTAT_OK;
 349   prb->SRB_TargStat = STATUS_GOOD;
 350
 351   /* now do  posting */
 352
 353   if (ASPI_POSTING(prb) && prb->SRB_PostProc) {
 354     dprintf_aspi(stddeb, "ASPI: Post Routine (%lx) called\n", (DWORD) prb->SRB_PostProc);
 355     Callbacks->CallASPIPostProc(prb->SRB_PostProc, segptr_prb);
 356   }
 357
 358   free(sg_reply_hdr);
 359   free(sg_hd);
 360   ASPI_DebugPrintResult16(prb);
 361   return SS_COMP;
 362
 363 error_exit:
 364   if (error_code == EBUSY) {
 365       prb->SRB_Status = SS_ASPI_IS_BUSY;
 366       dprintf_aspi(stddeb, "ASPI: Device busy\n");
 367   }
 368   else {
 369       dprintf_aspi(stddeb, "ASPI_GenericHandleScsiCmd failed\n");
 370       prb->SRB_Status = SS_ERR;
 371   }
 372
 373   /* I'm not sure exactly error codes work here
 374    * We probably should set prb->SRB_TargStat, SRB_HaStat ?
 375    */
 376   dprintf_aspi(stddeb, "ASPI_GenericHandleScsiCmd: error_exit\n");
 377   free(sg_reply_hdr);
 378   free(sg_hd);
 379   return prb->SRB_Status;
 380 }
 381 #endif
 382
 383 /***********************************************************************
 384  *             GetASPISupportInfo16   (WINASPI.1)
 385  */
 386
 387 WORD WINAPI GetASPISupportInfo16()
 388 {
 389 #ifdef linux
 390     dprintf_aspi(stddeb, "GETASPISupportInfo\n");
 391     /* high byte SS_COMP - low byte number of host adapters.
 392      * FIXME!!! The number of host adapters is incorrect.
 393      * I'm not sure how to determine this under linux etc.
 394      */
 395     return ((SS_COMP << 8) | 0x1);
 396 #else
 397     return ((SS_COMP << 8) | 0x0);
 398 #endif
 399 }
 400
 401 /***********************************************************************
 402  *             SendASPICommand16   (WINASPI.2)
 403  */
 404
 405 WORD WINAPI SendASPICommand16(SEGPTR segptr_srb)
 406 {
 407 #ifdef linux
 408   LPSRB16 lpSRB = PTR_SEG_TO_LIN(segptr_srb);
 409
 410   switch (lpSRB->common.SRB_cmd) {
 411   case SC_HA_INQUIRY:
 412     dprintf_aspi(stddeb, "ASPI: Not implemented SC_HA_INQUIRY\n");
 413     break;
 414   case SC_GET_DEV_TYPE:
 415     dprintf_aspi(stddeb, "ASPI: Not implemented SC_GET_DEV_TYPE\n");
 416     break;
 417   case SC_EXEC_SCSI_CMD:
 418     return ASPI_ExecScsiCmd16(&lpSRB->cmd, segptr_srb);
 419     break;
 420   case SC_RESET_DEV:
 421     dprintf_aspi(stddeb, "ASPI: Not implemented SC_RESET_DEV\n");
 422     break;
 423   default:
 424     dprintf_aspi(stddeb, "ASPI: Unknown command %d\n", lpSRB->common.SRB_cmd);
 425   }
 426   return SS_INVALID_SRB;
 427 #else
 428   return SS_INVALID_SRB;
 429 #endif
 430 }
 431
 432 /***********************************************************************
 433  *             GetASPIDLLVersion   (WINASPI.4)
 434  */
 435
 436 DWORD WINAPI GetASPIDLLVersion()
 437 {
 438 #ifdef linux
 439         return (DWORD)2;
 440 #else
 441         return (DWORD)0;
 442 #endif
 443 }