dlls/winedos/dosaspi.c

   1 /*
   2  * Copyright 2000 David Elliott
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the Free Software
  16  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  17  */
  18
  19 #include "config.h"
  20
  21 #include <string.h>
  22 #include "winbase.h"
  23 #include "wine/windef16.h"
  24 #include "wine/winaspi.h"
  25 #include "wine/debug.h"
  26 #include "miscemu.h" /* DOSMEM_* */
  27 #include "winerror.h"
  28
  29 WINE_DEFAULT_DEBUG_CHANNEL(aspi);
  30
  31 static HINSTANCE hWNASPI32 = INVALID_HANDLE_VALUE;
  32 static DWORD (__cdecl *pSendASPI32Command) (LPSRB) = NULL;
  33
  34 static void
  35 DOSASPI_PostProc( SRB_ExecSCSICmd *lpPRB )
  36 {
  37         DWORD ptrSRB;
  38         LPSRB16 lpSRB16;
  39
  40
  41         memcpy(&ptrSRB,lpPRB->SenseArea + lpPRB->SRB_SenseLen,sizeof(DWORD));
  42         TRACE("Copying data back to DOS client at 0x%8lx\n",ptrSRB);
  43         lpSRB16 = PTR_REAL_TO_LIN(SELECTOROF(ptrSRB),OFFSETOF(ptrSRB));
  44         lpSRB16->cmd.SRB_TargStat = lpPRB->SRB_TargStat;
  45         lpSRB16->cmd.SRB_HaStat = lpPRB->SRB_HaStat;
  46         memcpy(lpSRB16->cmd.CDBByte + lpSRB16->cmd.SRB_CDBLen,lpPRB->SenseArea,lpSRB16->cmd.SRB_SenseLen);
  47
  48         /* Now do posting */
  49         if( lpPRB->SRB_Status == SS_SECURITY_VIOLATION )
  50         {
  51                 /* SS_SECURITY_VIOLATION isn't defined in DOS ASPI */
  52                 TRACE("Returning SS_NO_DEVICE for SS_SECURITY_VIOLATION\n");
  53                 lpPRB->SRB_Status = SS_NO_DEVICE;
  54         }
  55
  56         lpSRB16->cmd.SRB_Status = lpPRB->SRB_Status;
  57         TRACE("SRB_Status = 0x%x\n", lpPRB->SRB_Status);
  58
  59         HeapFree(GetProcessHeap(),0,lpPRB);
  60
  61         if( (lpSRB16->cmd.SRB_Flags & SRB_POSTING) && lpSRB16->cmd.SRB_PostProc )
  62         {
  63                 CONTEXT86 ctx;
  64 /* The stack should look like this on entry to proc
  65  * NOTE: the SDK draws the following diagram bass akwards, use this one
  66  * to avoid being confused.  Remember, the act of pushing something on
  67  * an intel stack involves decreasing the stack pointer by the size of
  68  * the data, and then copying the data at the new SP.
  69  */
  70 /***************************
  71  * ... Other crap that is already on the stack ...
  72  * Segment of SRB Pointer               <- SP+6
  73  * Offset of SRB Pointer                <- SP+4
  74  * Segment of return address            <- SP+2
  75  * Offset of return address             <- SP+0
  76  */
  77                 /* FIXME: I am about 99% sure what is here is correct,
  78                  * but this code has never been tested (and probably
  79                  * won't be either until someone finds a DOS program
  80                  * that actually uses a Post Routine) */
  81
  82                 /* Zero everything */
  83                 memset(&ctx, 0, sizeof(ctx));
  84                 /* CS:IP is routine to call */
  85                 ctx.SegCs = SELECTOROF(lpSRB16->cmd.SRB_PostProc);
  86                 ctx.Eip   = OFFSETOF(lpSRB16->cmd.SRB_PostProc);
  87                 /* DPMI_CallRMProc will push the pointer to the stack
  88                  * it is given (in this case &ptrSRB) with length
  89                  * 2*sizeof(WORD), that is, it copies the the contents
  90                  * of ptrSRB onto the stack, and decs sp by 2*sizeof(WORD).
  91                  * After doing that, it pushes the return address
  92                  * onto the stack (so we don't need to worry about that)
  93                  * So the stack should be okay for the PostProc
  94                  */
  95                 if(DPMI_CallRMProc(&ctx, (LPWORD)&ptrSRB, 2, FALSE))
  96                 {
  97                         TRACE("DPMI_CallRMProc returned nonzero (error) status\n");
  98                 }
  99         } /* if ((SRB_Flags&SRB_POSTING) && SRB_PostProc) */
 100 }
 101
 102 static
 103 DWORD ASPI_SendASPIDOSCommand(DWORD ptrSRB)
 104 {
 105         PSRB_ExecSCSICmd lpPRB;
 106         DWORD retval;
 107         union tagSRB16 * lpSRB16;
 108
 109         lpSRB16 = PTR_REAL_TO_LIN(SELECTOROF(ptrSRB),OFFSETOF(ptrSRB));
 110
 111         retval = SS_ERR;
 112         switch( lpSRB16->common.SRB_Cmd )
 113         {
 114         case SC_HA_INQUIRY:
 115                 TRACE("SC_HA_INQUIRY\n");
 116                 /* Format is identical in this case */
 117                 retval = (*pSendASPI32Command)((LPSRB)lpSRB16);
 118                 break;
 119         case SC_GET_DEV_TYPE:
 120                 TRACE("SC_GET_DEV_TYPE\n");
 121                 /* Format is identical in this case */
 122                 retval = (*pSendASPI32Command)((LPSRB)lpSRB16);
 123                 break;
 124         case SC_EXEC_SCSI_CMD:
 125                 TRACE("SC_EXEC_SCSI_CMD\n");
 126                 TRACE("Copying data from DOS client at 0x%8lx\n",ptrSRB);
 127                 lpPRB = HeapAlloc(GetProcessHeap(),0,sizeof(SRB)+lpSRB16->cmd.SRB_SenseLen+sizeof(DWORD));
 128 #define srb_dos_to_w32(name) \
 129                 lpPRB->SRB_##name = lpSRB16->cmd.SRB_##name
 130
 131                 srb_dos_to_w32(Cmd);
 132                 srb_dos_to_w32(Status);
 133                 srb_dos_to_w32(HaId);
 134                 srb_dos_to_w32(BufLen);
 135                 srb_dos_to_w32(SenseLen);
 136                 srb_dos_to_w32(CDBLen);
 137                 srb_dos_to_w32(Target);
 138                 srb_dos_to_w32(Lun);
 139 #undef srb_dos_to_w32
 140
 141                 /* Allow certain flags to go on to WNASPI32, we also need
 142                  * to make sure SRB_POSTING is enabled */
 143                 lpPRB->SRB_Flags = SRB_POSTING | (lpSRB16->cmd.SRB_Flags&(SRB_DIR_IN|SRB_DIR_OUT|SRB_ENABLE_RESIDUAL_COUNT));
 144
 145                 /* Pointer to data buffer */
 146                 lpPRB->SRB_BufPointer = PTR_REAL_TO_LIN(SELECTOROF(lpSRB16->cmd.SRB_BufPointer),
 147                                                         OFFSETOF(lpSRB16->cmd.SRB_BufPointer));
 148                 /* Copy CDB in */
 149                 memcpy(&lpPRB->CDBByte[0],&lpSRB16->cmd.CDBByte[0],lpSRB16->cmd.SRB_CDBLen);
 150
 151                 /* Set post proc to our post proc */
 152                 lpPRB->SRB_PostProc = &DOSASPI_PostProc;
 153
 154                 /* Stick the DWORD after all the sense info */
 155                 memcpy(lpPRB->SenseArea + lpPRB->SRB_SenseLen,&ptrSRB,sizeof(DWORD));
 156                 retval = (*pSendASPI32Command)((LPSRB)lpPRB);
 157                 break;
 158         case SC_ABORT_SRB:
 159                 TRACE("SC_ABORT_SRB\n");
 160                 /* Would need some sort of table of active shit */
 161                 break;
 162         case SC_RESET_DEV:
 163                 TRACE("SC_RESET_DEV\n");
 164                 break;
 165         default:
 166                 TRACE("Unkown command code\n");
 167                 break;
 168         }
 169
 170         TRACE("Returning %lx\n", retval );
 171         return retval;
 172 }
 173
 174 void WINAPI ASPI_DOS_func(CONTEXT86 *context)
 175 {
 176         WORD *stack = CTX_SEG_OFF_TO_LIN(context, context->SegSs, context->Esp);
 177         DWORD ptrSRB = *(DWORD *)&stack[2];
 178
 179         ASPI_SendASPIDOSCommand(ptrSRB);
 180
 181         /* simulate a normal RETF sequence as required by DPMI CallRMProcFar */
 182         context->Eip = *(stack++);
 183         context->SegCs  = *(stack++);
 184         context->Esp += 2*sizeof(WORD);
 185 }
 186
 187
 188 /**********************************************************************
 189  *          ASPIHandler  (WINEDOS.@)
 190  *
 191  * returns the address of a real mode callback to ASPI_DOS_func()
 192  */
 193 void WINAPI DOSVM_ASPIHandler( CONTEXT86 *context )
 194 {
 195         FARPROC16 *p = (FARPROC16 *)CTX_SEG_OFF_TO_LIN(context, context->SegDs, context->Edx);
 196         TRACE("DOS ASPI opening\n");
 197         if ((CX_reg(context) == 4) || (CX_reg(context) == 5))
 198         {
 199                 if( hWNASPI32 == INVALID_HANDLE_VALUE )
 200                 {
 201                         TRACE("Loading WNASPI32\n");
 202                         hWNASPI32 = LoadLibraryExA("WNASPI32", 0, 0);
 203                 }
 204
 205                 if( hWNASPI32 == INVALID_HANDLE_VALUE )
 206                 {
 207                         ERR("Error loading WNASPI32\n");
 208                         goto error_exit;
 209                 }
 210
 211                 /* Get SendASPI32Command by Ordinal 2 */
 212                 /* Cast to correct argument/return types */
 213                 pSendASPI32Command = (DWORD (*)(LPSRB))GetProcAddress(hWNASPI32, (LPBYTE)2);
 214                 if( !pSendASPI32Command )
 215                 {
 216                         ERR("Error getting ordinal 2 from WNASPI32\n");
 217                         goto error_exit;
 218                 }
 219
 220                 *p = DPMI_AllocInternalRMCB(ASPI_DOS_func);
 221                 TRACE("allocated real mode proc %p\n", *p);
 222                 SET_AX( context, CX_reg(context) );
 223
 224                 return;
 225         }
 226 error_exit:
 227         /* Return some error... General Failure sounds okay */
 228         SET_AX( context, ERROR_GEN_FAILURE );
 229         SET_CFLAG(context);
 230 }