msdos/dosaspi.c

   1 #include "config.h"
   2
   3 #include "winbase.h"
   4 #include "wine/windef16.h"
   5 #include "wine/winaspi.h"
   6 #include "heap.h"
   7 #include "debugtools.h"
   8 #include "miscemu.h" /* DOSMEM_* */
   9 #include "callback.h"
  10 #include "winerror.h"
  11
  12 DEFAULT_DEBUG_CHANNEL(aspi);
  13
  14 static HINSTANCE hWNASPI32 = INVALID_HANDLE_VALUE;
  15 static DWORD (__cdecl *pSendASPI32Command) (LPSRB) = NULL;
  16
  17 static void
  18 DOSASPI_PostProc( SRB_ExecSCSICmd *lpPRB )
  19 {
  20         DWORD ptrSRB;
  21         LPSRB16 lpSRB16;
  22
  23
  24         memcpy(&ptrSRB,lpPRB->SenseArea + lpPRB->SRB_SenseLen,sizeof(DWORD));
  25         TRACE("Copying data back to DOS client at 0x%8lx\n",ptrSRB);
  26         lpSRB16 = DOSMEM_MapRealToLinear(ptrSRB);
  27         lpSRB16->cmd.SRB_TargStat = lpPRB->SRB_TargStat;
  28         lpSRB16->cmd.SRB_HaStat = lpPRB->SRB_HaStat;
  29         memcpy(lpSRB16->cmd.CDBByte + lpSRB16->cmd.SRB_CDBLen,lpPRB->SenseArea,lpSRB16->cmd.SRB_SenseLen);
  30
  31         /* Now do posting */
  32         if( lpPRB->SRB_Status == SS_SECURITY_VIOLATION )
  33         {
  34                 /* SS_SECURITY_VIOLATION isn't defined in DOS ASPI */
  35                 TRACE("Returning SS_NO_DEVICE for SS_SECURITY_VIOLATION\n");
  36                 lpPRB->SRB_Status = SS_NO_DEVICE;
  37         }
  38
  39         lpSRB16->cmd.SRB_Status = lpPRB->SRB_Status;
  40         TRACE("SRB_Status = 0x%x\n", lpPRB->SRB_Status);
  41
  42         HeapFree(GetProcessHeap(),0,lpPRB);
  43
  44         if( (lpSRB16->cmd.SRB_Flags & SRB_POSTING) && lpSRB16->cmd.SRB_PostProc )
  45         {
  46                 CONTEXT86 ctx;
  47 /* The stack should look like this on entry to proc
  48  * NOTE: the SDK draws the following diagram bass akwards, use this one
  49  * to avoid being confused.  Remember, the act of pushing something on
  50  * an intel stack involves decreasing the stack pointer by the size of
  51  * the data, and then copying the data at the new SP.
  52  */
  53 /***************************
  54  * ... Other crap that is already on the stack ...
  55  * Segment of SRB Pointer               <- SP+6
  56  * Offset of SRB Pointer                <- SP+4
  57  * Segment of return address            <- SP+2
  58  * Offset of return address             <- SP+0
  59  */
  60                 /* FIXME: I am about 99% sure what is here is correct,
  61                  * but this code has never been tested (and probably
  62                  * won't be either until someone finds a DOS program
  63                  * that actually uses a Post Routine) */
  64
  65                 /* Zero everything */
  66                 memset(&ctx, 0, sizeof(ctx));
  67                 /* CS:IP is routine to call */
  68                 ctx.SegCs = SELECTOROF(lpSRB16->cmd.SRB_PostProc);
  69                 ctx.Eip   = OFFSETOF(lpSRB16->cmd.SRB_PostProc);
  70                 /* DPMI_CallRMProc will push the pointer to the stack
  71                  * it is given (in this case &ptrSRB) with length
  72                  * 2*sizeof(WORD), that is, it copies the the contents
  73                  * of ptrSRB onto the stack, and decs sp by 2*sizeof(WORD).
  74                  * After doing that, it pushes the return address
  75                  * onto the stack (so we don't need to worry about that)
  76                  * So the stack should be okay for the PostProc
  77                  */
  78                 if(DPMI_CallRMProc(&ctx, (LPWORD)&ptrSRB, 2, FALSE))
  79                 {
  80                         TRACE("DPMI_CallRMProc returned nonzero (error) status\n");
  81                 }
  82         } /* if ((SRB_Flags&SRB_POSTING) && SRB_PostProc) */
  83 }
  84
  85 static
  86 DWORD ASPI_SendASPIDOSCommand(DWORD ptrSRB)
  87 {
  88         PSRB_ExecSCSICmd lpPRB;
  89         DWORD retval;
  90         union tagSRB16 * lpSRB16;
  91
  92         lpSRB16 = DOSMEM_MapRealToLinear(ptrSRB);
  93
  94         retval = SS_ERR;
  95         switch( lpSRB16->common.SRB_Cmd )
  96         {
  97         case SC_HA_INQUIRY:
  98                 TRACE("SC_HA_INQUIRY\n");
  99                 /* Format is identical in this case */
 100                 retval = (*pSendASPI32Command)((LPSRB)lpSRB16);
 101                 break;
 102         case SC_GET_DEV_TYPE:
 103                 TRACE("SC_GET_DEV_TYPE\n");
 104                 /* Format is identical in this case */
 105                 retval = (*pSendASPI32Command)((LPSRB)lpSRB16);
 106                 break;
 107         case SC_EXEC_SCSI_CMD:
 108                 TRACE("SC_EXEC_SCSI_CMD\n");
 109                 TRACE("Copying data from DOS client at 0x%8lx\n",ptrSRB);
 110                 lpPRB = HeapAlloc(GetProcessHeap(),0,sizeof(SRB)+lpSRB16->cmd.SRB_SenseLen+sizeof(DWORD));
 111 #define srb_dos_to_w32(name) \
 112                 lpPRB->SRB_##name = lpSRB16->cmd.SRB_##name
 113
 114                 srb_dos_to_w32(Cmd);
 115                 srb_dos_to_w32(Status);
 116                 srb_dos_to_w32(HaId);
 117                 srb_dos_to_w32(BufLen);
 118                 srb_dos_to_w32(SenseLen);
 119                 srb_dos_to_w32(CDBLen);
 120                 srb_dos_to_w32(Target);
 121                 srb_dos_to_w32(Lun);
 122 #undef srb_dos_to_w32
 123
 124                 /* Allow certain flags to go on to WNASPI32, we also need
 125                  * to make sure SRB_POSTING is enabled */
 126                 lpPRB->SRB_Flags = SRB_POSTING | (lpSRB16->cmd.SRB_Flags&(SRB_DIR_IN|SRB_DIR_OUT|SRB_ENABLE_RESIDUAL_COUNT));
 127
 128                 /* Pointer to data buffer */
 129                 lpPRB->SRB_BufPointer = DOSMEM_MapRealToLinear(lpSRB16->cmd.SRB_BufPointer);
 130                 /* Copy CDB in */
 131                 memcpy(&lpPRB->CDBByte[0],&lpSRB16->cmd.CDBByte[0],lpSRB16->cmd.SRB_CDBLen);
 132
 133                 /* Set post proc to our post proc */
 134                 lpPRB->SRB_PostProc = &DOSASPI_PostProc;
 135
 136                 /* Stick the DWORD after all the sense info */
 137                 memcpy(lpPRB->SenseArea + lpPRB->SRB_SenseLen,&ptrSRB,sizeof(DWORD));
 138                 retval = (*pSendASPI32Command)((LPSRB)lpPRB);
 139                 break;
 140         case SC_ABORT_SRB:
 141                 TRACE("SC_ABORT_SRB\n");
 142                 /* Would need some sort of table of active shit */
 143                 break;
 144         case SC_RESET_DEV:
 145                 TRACE("SC_RESET_DEV\n");
 146                 break;
 147         default:
 148                 TRACE("Unkown command code\n");
 149                 break;
 150         }
 151
 152         TRACE("Returning %lx\n", retval );
 153         return retval;
 154 }
 155
 156 void WINAPI ASPI_DOS_func(CONTEXT86 *context)
 157 {
 158         WORD *stack = CTX_SEG_OFF_TO_LIN(context, context->SegSs, context->Esp);
 159         DWORD ptrSRB = *(DWORD *)&stack[2];
 160
 161         ASPI_SendASPIDOSCommand(ptrSRB);
 162
 163         /* simulate a normal RETF sequence as required by DPMI CallRMProcFar */
 164         context->Eip = *(stack++);
 165         context->SegCs  = *(stack++);
 166         context->Esp += 2*sizeof(WORD);
 167 }
 168
 169
 170 /* returns the address of a real mode callback to ASPI_DOS_func() */
 171 void ASPI_DOS_HandleInt(CONTEXT86 *context)
 172 {
 173         FARPROC16 *p = (FARPROC16 *)CTX_SEG_OFF_TO_LIN(context, context->SegDs, context->Edx);
 174         TRACE("DOS ASPI opening\n");
 175         if ((CX_reg(context) == 4) || (CX_reg(context) == 5))
 176         {
 177                 if( hWNASPI32 == INVALID_HANDLE_VALUE )
 178                 {
 179                         TRACE("Loading WNASPI32\n");
 180                         hWNASPI32 = LoadLibraryExA("WNASPI32", 0, 0);
 181                 }
 182
 183                 if( hWNASPI32 == INVALID_HANDLE_VALUE )
 184                 {
 185                         ERR("Error loading WNASPI32\n");
 186                         goto error_exit;
 187                 }
 188
 189                 /* Get SendASPI32Command by Ordinal 2 */
 190                 /* Cast to correct argument/return types */
 191                 pSendASPI32Command = (DWORD (*)(LPSRB))GetProcAddress(hWNASPI32, (LPBYTE)2);
 192                 if( !pSendASPI32Command )
 193                 {
 194                         ERR("Error getting ordinal 2 from WNASPI32\n");
 195                         goto error_exit;
 196                 }
 197
 198                 *p = DPMI_AllocInternalRMCB(ASPI_DOS_func);
 199                 TRACE("allocated real mode proc %p\n", *p);
 200                 AX_reg(context) = CX_reg(context);
 201
 202                 return;
 203         }
 204 error_exit:
 205         /* Return some error... General Failure sounds okay */
 206         AX_reg(context) = ERROR_GEN_FAILURE;
 207         SET_CFLAG(context);
 208 }