dlls/krnl386.exe16/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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  17  */
  18
  19 #include "config.h"
  20
  21 #include <stdarg.h>
  22 #include <string.h>
  23 #include "windef.h"
  24 #include "winbase.h"
  25 #include "wine/windef16.h"
  26 #include "wine/winaspi.h"
  27 #include "wine/debug.h"
  28 #include "dosexe.h"
  29 #include "winerror.h"
  30
  31 WINE_DEFAULT_DEBUG_CHANNEL(aspi);
  32
  33 static HINSTANCE hWNASPI32 = INVALID_HANDLE_VALUE;
  34 static DWORD (__cdecl *pSendASPI32Command) (LPSRB) = NULL;
  35
  36 static void
  37 DOSASPI_PostProc( SRB_ExecSCSICmd *lpPRB )
  38 {
  39         DWORD ptrSRB;
  40         LPSRB16 lpSRB16;
  41
  42
  43         memcpy(&ptrSRB,lpPRB->SenseArea + lpPRB->SRB_SenseLen,sizeof(DWORD));
  44         TRACE("Copying data back to DOS client at 0x%8x\n",ptrSRB);
  45         lpSRB16 = PTR_REAL_TO_LIN(SELECTOROF(ptrSRB),OFFSETOF(ptrSRB));
  46         lpSRB16->cmd.SRB_TargStat = lpPRB->SRB_TargStat;
  47         lpSRB16->cmd.SRB_HaStat = lpPRB->SRB_HaStat;
  48         memcpy(lpSRB16->cmd.CDBByte + lpSRB16->cmd.SRB_CDBLen,lpPRB->SenseArea,lpSRB16->cmd.SRB_SenseLen);
  49
  50         /* Now do posting */
  51         if( lpPRB->SRB_Status == SS_SECURITY_VIOLATION )
  52         {
  53                 /* SS_SECURITY_VIOLATION isn't defined in DOS ASPI */
  54                 TRACE("Returning SS_NO_DEVICE for SS_SECURITY_VIOLATION\n");
  55                 lpPRB->SRB_Status = SS_NO_DEVICE;
  56         }
  57
  58         lpSRB16->cmd.SRB_Status = lpPRB->SRB_Status;
  59         TRACE("SRB_Status = 0x%x\n", lpPRB->SRB_Status);
  60
  61         HeapFree(GetProcessHeap(),0,lpPRB);
  62
  63         if( (lpSRB16->cmd.SRB_Flags & SRB_POSTING) && lpSRB16->cmd.SRB_PostProc )
  64         {
  65                 CONTEXT ctx;
  66 /* The stack should look like this on entry to proc
  67  * NOTE: the SDK draws the following diagram bass awkwardly, use this one
  68  * to avoid being confused.  Remember, the act of pushing something on
  69  * an intel stack involves decreasing the stack pointer by the size of
  70  * the data, and then copying the data at the new SP.
  71  */
  72 /***************************
  73  * ... Other crap that is already on the stack ...
  74  * Segment of SRB Pointer               <- SP+6
  75  * Offset of SRB Pointer                <- SP+4
  76  * Segment of return address            <- SP+2
  77  * Offset of return address             <- SP+0
  78  */
  79                 /* FIXME: I am about 99% sure what is here is correct,
  80                  * but this code has never been tested (and probably
  81                  * won't be either until someone finds a DOS program
  82                  * that actually uses a Post Routine) */
  83
  84                 /* Zero everything */
  85                 memset(&ctx, 0, sizeof(ctx));
  86                 ctx.EFlags |= V86_FLAG;
  87
  88                 /* CS:IP is routine to call */
  89                 ctx.SegCs = SELECTOROF(lpSRB16->cmd.SRB_PostProc);
  90                 ctx.Eip   = OFFSETOF(lpSRB16->cmd.SRB_PostProc);
  91                 /* DPMI_CallRMProc will push the pointer to the stack
  92                  * it is given (in this case &ptrSRB) with length
  93                  * 2*sizeof(WORD), that is, it copies the contents
  94                  * of ptrSRB onto the stack, and decs sp by 2*sizeof(WORD).
  95                  * After doing that, it pushes the return address
  96                  * onto the stack (so we don't need to worry about that)
  97                  * So the stack should be okay for the PostProc
  98                  */
  99                 if(DPMI_CallRMProc(&ctx, (LPWORD)&ptrSRB, 2, FALSE))
 100                 {
 101                         TRACE("DPMI_CallRMProc returned nonzero (error) status\n");
 102                 }
 103         } /* if ((SRB_Flags&SRB_POSTING) && SRB_PostProc) */
 104 }
 105
 106 static
 107 DWORD ASPI_SendASPIDOSCommand(DWORD ptrSRB)
 108 {
 109         PSRB_ExecSCSICmd lpPRB;
 110         DWORD retval;
 111         union tagSRB16 * lpSRB16;
 112
 113         lpSRB16 = PTR_REAL_TO_LIN(SELECTOROF(ptrSRB),OFFSETOF(ptrSRB));
 114
 115         retval = SS_ERR;
 116         switch( lpSRB16->common.SRB_Cmd )
 117         {
 118         case SC_HA_INQUIRY:
 119                 TRACE("SC_HA_INQUIRY\n");
 120                 /* Format is identical in this case */
 121                 retval = (*pSendASPI32Command)((LPSRB)lpSRB16);
 122                 break;
 123         case SC_GET_DEV_TYPE:
 124                 TRACE("SC_GET_DEV_TYPE\n");
 125                 /* Format is identical in this case */
 126                 retval = (*pSendASPI32Command)((LPSRB)lpSRB16);
 127                 break;
 128         case SC_EXEC_SCSI_CMD:
 129                 TRACE("SC_EXEC_SCSI_CMD\n");
 130                 TRACE("Copying data from DOS client at 0x%8x\n",ptrSRB);
 131                 lpPRB = HeapAlloc(GetProcessHeap(),0,sizeof(SRB)+lpSRB16->cmd.SRB_SenseLen+sizeof(DWORD));
 132 #define srb_dos_to_w32(name) \
 133                 lpPRB->SRB_##name = lpSRB16->cmd.SRB_##name
 134
 135                 srb_dos_to_w32(Cmd);
 136                 srb_dos_to_w32(Status);
 137                 srb_dos_to_w32(HaId);
 138                 srb_dos_to_w32(BufLen);
 139                 srb_dos_to_w32(SenseLen);
 140                 srb_dos_to_w32(CDBLen);
 141                 srb_dos_to_w32(Target);
 142                 srb_dos_to_w32(Lun);
 143 #undef srb_dos_to_w32
 144
 145                 /* Allow certain flags to go on to WNASPI32, we also need
 146                  * to make sure SRB_POSTING is enabled */
 147                 lpPRB->SRB_Flags = SRB_POSTING | (lpSRB16->cmd.SRB_Flags&(SRB_DIR_IN|SRB_DIR_OUT|SRB_ENABLE_RESIDUAL_COUNT));
 148
 149                 /* Pointer to data buffer */
 150                 lpPRB->SRB_BufPointer = PTR_REAL_TO_LIN(SELECTOROF(lpSRB16->cmd.SRB_BufPointer),
 151                                                         OFFSETOF(lpSRB16->cmd.SRB_BufPointer));
 152                 /* Copy CDB in */
 153                 memcpy(&lpPRB->CDBByte[0],&lpSRB16->cmd.CDBByte[0],lpSRB16->cmd.SRB_CDBLen);
 154
 155                 /* Set post proc to our post proc */
 156                 lpPRB->SRB_PostProc = DOSASPI_PostProc;
 157
 158                 /* Stick the DWORD after all the sense info */
 159                 memcpy(lpPRB->SenseArea + lpPRB->SRB_SenseLen,&ptrSRB,sizeof(DWORD));
 160                 retval = (*pSendASPI32Command)((LPSRB)lpPRB);
 161                 break;
 162         case SC_ABORT_SRB:
 163                 TRACE("SC_ABORT_SRB\n");
 164                 /* Would need some sort of table of active shit */
 165                 break;
 166         case SC_RESET_DEV:
 167                 TRACE("SC_RESET_DEV\n");
 168                 break;
 169         default:
 170                 TRACE("Unknown command code\n");
 171                 break;
 172         }
 173
 174         TRACE("Returning %x\n", retval );
 175         return retval;
 176 }
 177
 178 static void WINAPI ASPI_DOS_func(CONTEXT *context)
 179 {
 180         WORD *stack = CTX_SEG_OFF_TO_LIN(context, context->SegSs, context->Esp);
 181         DWORD ptrSRB = *(DWORD *)&stack[2];
 182
 183         ASPI_SendASPIDOSCommand(ptrSRB);
 184
 185         /* simulate a normal RETF sequence as required by DPMI CallRMProcFar */
 186         context->Eip = *(stack++);
 187         context->SegCs  = *(stack++);
 188         context->Esp += 2*sizeof(WORD);
 189 }
 190
 191
 192 /**********************************************************************
 193  *          ASPIHandler
 194  *
 195  * returns the address of a real mode callback to ASPI_DOS_func()
 196  */
 197 void DOSVM_ASPIHandler( CONTEXT *context )
 198 {
 199         FARPROC16 *p = CTX_SEG_OFF_TO_LIN(context, context->SegDs, context->Edx);
 200         TRACE("DOS ASPI opening\n");
 201         if ((CX_reg(context) == 4) || (CX_reg(context) == 5))
 202         {
 203                 if( hWNASPI32 == INVALID_HANDLE_VALUE )
 204                 {
 205                         TRACE("Loading WNASPI32\n");
 206                         hWNASPI32 = LoadLibraryExA("WNASPI32", 0, 0);
 207                 }
 208
 209                 if( hWNASPI32 == INVALID_HANDLE_VALUE )
 210                 {
 211                         ERR("Error loading WNASPI32\n");
 212                         goto error_exit;
 213                 }
 214
 215                 /* Get SendASPI32Command by Ordinal 2 */
 216                 /* Cast to correct argument/return types */
 217                 pSendASPI32Command = (DWORD (*)(LPSRB))GetProcAddress(hWNASPI32, (LPCSTR)2);
 218                 if( !pSendASPI32Command )
 219                 {
 220                         ERR("Error getting ordinal 2 from WNASPI32\n");
 221                         goto error_exit;
 222                 }
 223
 224                 *p = DPMI_AllocInternalRMCB(ASPI_DOS_func);
 225                 TRACE("allocated real mode proc %p\n", *p);
 226                 SET_AX( context, CX_reg(context) );
 227
 228                 return;
 229         }
 230 error_exit:
 231         /* Return some error... General Failure sounds okay */
 232         SET_AX( context, ERROR_GEN_FAILURE );
 233         SET_CFLAG(context);
 234 }