iodev/scsi_device.h

   1 /////////////////////////////////////////////////////////////////////////
   2 // $Id: scsi_device.h,v 1.5 2007/09/28 19:52:05 sshwarts Exp $
   3 /////////////////////////////////////////////////////////////////////////
   4 //
   5 //  Copyright (C) 2007  Volker Ruppert
   6 //
   7 //  This library is free software; you can redistribute it and/or
   8 //  modify it under the terms of the GNU Lesser General Public
   9 //  License as published by the Free Software Foundation; either
  10 //  version 2 of the License, or (at your option) any later version.
  11 //
  12 //  This library is distributed in the hope that it will be useful,
  13 //  but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 //  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15 //  Lesser General Public License for more details.
  16 //
  17 //  You should have received a copy of the GNU Lesser General Public
  18 //  License along with this library; if not, write to the Free Software
  19 //  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  20
  21 // SCSI emulation layer ported from the Qemu project
  22
  23 #ifndef BX_IODEV_SCSI_DEVICE_H
  24 #define BX_IODEV_SCSI_DEVICE_H
  25
  26 typedef void (*scsi_completionfn)(void *opaque, int reason, Bit32u tag,
  27                                   Bit32u arg);
  28 class scsi_device_t;
  29 class LOWLEVEL_CDROM;
  30
  31 enum scsidev_type {
  32   SCSIDEV_TYPE_DISK,
  33   SCSIDEV_TYPE_CDROM
  34 };
  35
  36 enum scsi_reason {
  37   SCSI_REASON_DONE,
  38   SCSI_REASON_DATA
  39 };
  40
  41 #define SENSE_NO_SENSE        0
  42 #define SENSE_NOT_READY       2
  43 #define SENSE_HARDWARE_ERROR  4
  44 #define SENSE_ILLEGAL_REQUEST 5
  45
  46 #define SCSI_DMA_BUF_SIZE    65536
  47
  48 typedef struct SCSIRequest {
  49   scsi_device_t *dev;
  50   Bit32u tag;
  51   int sector;
  52   int sector_count;
  53   int buf_len;
  54   Bit8u dma_buf[SCSI_DMA_BUF_SIZE];
  55   struct SCSIRequest *next;
  56 } SCSIRequest;
  57
  58
  59 class scsi_device_t : public logfunctions {
  60 public:
  61   scsi_device_t(device_image_t *_hdimage, int _tcq,
  62                scsi_completionfn _completion, void *_dev);
  63   scsi_device_t(LOWLEVEL_CDROM *_cdrom, int _tcq,
  64                scsi_completionfn _completion, void *_dev);
  65   virtual ~scsi_device_t(void);
  66
  67   void register_state(bx_list_c *parent, const char *name);
  68   Bit32s scsi_send_command(Bit32u tag, Bit8u *buf, int lun);
  69   void scsi_command_complete(SCSIRequest *r, int sense);
  70   void scsi_cancel_io(Bit32u tag);
  71   void scsi_read_complete(void *req, int ret);
  72   void scsi_read_data(Bit32u tag);
  73   void scsi_write_complete(void *req, int ret);
  74   int scsi_write_data(Bit32u tag);
  75   Bit8u* scsi_get_buf(Bit32u tag);
  76 protected:
  77   SCSIRequest* scsi_new_request(Bit32u tag);
  78   void scsi_remove_request(SCSIRequest *r);
  79   SCSIRequest *scsi_find_request(Bit32u tag);
  80
  81 private:
  82   enum scsidev_type type;
  83   device_image_t *hdimage;
  84   LOWLEVEL_CDROM *cdrom;
  85   SCSIRequest *requests;
  86   int cluster_size;
  87   int sense;
  88   int tcq;
  89   scsi_completionfn completion;
  90   void *dev;
  91 };
  92
  93 #endif