Bochs/bochs/iodev/scsi_device.cc
Volker Ruppert 2ef1be6284 - ported most of the SCSI disk changes from Qemu to Bochs
- minor changes in SCSI command 0x23 (this command is designed for USB floppy
  support - we have to check if it is really needed for flash sticks and
  external hard drives)
- usb_msd: fixed indention
2009-04-01 18:19:46 +00:00

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/////////////////////////////////////////////////////////////////////////
// $Id: scsi_device.cc,v 1.14 2009-04-01 18:19:39 vruppert Exp $
/////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 2007 Volker Ruppert
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
// SCSI emulation layer ported from the Qemu project
// Define BX_PLUGGABLE in files that can be compiled into plugins. For
// platforms that require a special tag on exported symbols, BX_PLUGGABLE
// is used to know when we are exporting symbols and when we are importing.
#define BX_PLUGGABLE
#define NO_DEVICE_INCLUDES
#include "iodev.h"
#if BX_SUPPORT_PCI && BX_SUPPORT_PCIUSB
#include "hdimage.h"
#include "cdrom.h"
#include "scsi_device.h"
#define LOG_THIS
#define BX_MIN(a,b) ( ((a)>(b))?(b):(a) )
#define DEVICE_NAME "SCSI drive"
static SCSIRequest *free_requests = NULL;
scsi_device_t::scsi_device_t(device_image_t *_hdimage, int _tcq,
scsi_completionfn _completion, void *_dev)
{
type = SCSIDEV_TYPE_DISK;
cdrom = NULL;
hdimage = _hdimage;
requests = NULL;
sense = 0;
tcq = _tcq;
completion = _completion;
dev = _dev;
cluster_size = 1;
locked = 0;
max_lba = hdimage->hd_size / 512;
strcpy(drive_serial_str, "1.0");
put("SCSID");
}
scsi_device_t::scsi_device_t(LOWLEVEL_CDROM *_cdrom, int _tcq,
scsi_completionfn _completion, void *_dev)
{
type = SCSIDEV_TYPE_CDROM;
cdrom = _cdrom;
hdimage = NULL;
requests = NULL;
sense = 0;
tcq = _tcq;
completion = _completion;
dev = _dev;
cluster_size = 4;
locked = 0;
max_lba = cdrom->capacity();
strcpy(drive_serial_str, "1.0");
put("SCSIC");
}
scsi_device_t::~scsi_device_t(void)
{
SCSIRequest *r, *next;
if (requests) {
r = requests;
while (r != NULL) {
next = r->next;
delete r;
r = next;
}
}
if (free_requests) {
r = free_requests;
while (r != NULL) {
next = r->next;
delete r;
r = next;
}
free_requests = NULL;
}
}
void scsi_device_t::register_state(bx_list_c *parent, const char *name)
{
bx_list_c *list = new bx_list_c(parent, name, "", 1);
new bx_shadow_num_c(list, "sense", &sense);
// TODO: save/restore for SCSI requests
}
SCSIRequest* scsi_device_t::scsi_new_request(Bit32u tag)
{
SCSIRequest *r;
if (free_requests) {
r = free_requests;
free_requests = r->next;
} else {
r = new SCSIRequest;
}
r->dev = this;
r->tag = tag;
r->sector_count = 0;
r->buf_len = 0;
r->status = 0;
r->next = requests;
requests = r;
return r;
}
void scsi_device_t::scsi_remove_request(SCSIRequest *r)
{
SCSIRequest *last;
if (requests == r) {
requests = r->next;
} else {
last = requests;
while (last != NULL) {
if (last->next != r)
last = last->next;
else
break;
}
if (last) {
last->next = r->next;
} else {
BX_ERROR(("orphaned request"));
}
}
r->next = free_requests;
free_requests = r;
}
SCSIRequest* scsi_device_t::scsi_find_request(Bit32u tag)
{
SCSIRequest *r = requests;
while (r != NULL) {
if (r->tag != tag)
r = r->next;
else
break;
}
return r;
}
void scsi_device_t::scsi_command_complete(SCSIRequest *r, int status, int _sense)
{
Bit32u tag;
BX_DEBUG(("command complete tag=0x%x status=%d sense=%d", r->tag, status, sense));
sense = _sense;
tag = r->tag;
scsi_remove_request(r);
completion(dev, SCSI_REASON_DONE, tag, status);
}
void scsi_device_t::scsi_cancel_io(Bit32u tag)
{
BX_DEBUG(("cancel tag=0x%x", tag));
SCSIRequest *r = scsi_find_request(tag);
if (r) {
scsi_remove_request(r);
}
}
void scsi_device_t::scsi_read_complete(void *req, int ret)
{
SCSIRequest *r = (SCSIRequest *)req;
if (ret) {
BX_ERROR(("IO error"));
completion(r, SCSI_REASON_DATA, r->tag, 0);
scsi_command_complete(r, STATUS_CHECK_CONDITION, SENSE_NO_SENSE);
return;
}
BX_DEBUG(("data ready tag=0x%x len=%d", r->tag, r->buf_len));
completion(dev, SCSI_REASON_DATA, r->tag, r->buf_len);
}
void scsi_device_t::scsi_read_data(Bit32u tag)
{
Bit32u n;
int ret;
SCSIRequest *r = scsi_find_request(tag);
if (!r) {
BX_ERROR(("bad read tag 0x%x", tag));
// ??? This is the wrong error.
scsi_command_complete(r, STATUS_CHECK_CONDITION, SENSE_HARDWARE_ERROR);
return;
}
if (r->sector_count == -1) {
BX_DEBUG(("read buf_len=%d", r->buf_len));
r->sector_count = 0;
completion(dev, SCSI_REASON_DATA, r->tag, r->buf_len);
return;
}
BX_DEBUG(("read sector_count=%d", r->sector_count));
if (r->sector_count == 0) {
scsi_command_complete(r, STATUS_GOOD, SENSE_NO_SENSE);
return;
}
n = r->sector_count;
if (n > (Bit32u)(SCSI_DMA_BUF_SIZE / (512 * cluster_size)))
n = SCSI_DMA_BUF_SIZE / (512 * cluster_size);
r->buf_len = n * 512 * cluster_size;
if (type == SCSIDEV_TYPE_CDROM) {
if (!cdrom->read_block(r->dma_buf, r->sector, 2048)) {
scsi_command_complete(r, STATUS_CHECK_CONDITION, SENSE_HARDWARE_ERROR);
}
} else {
ret = (int)hdimage->lseek(r->sector * 512, SEEK_SET);
if (ret < 0) {
BX_ERROR(("could not lseek() hard drive image file"));
scsi_command_complete(r, STATUS_CHECK_CONDITION, SENSE_HARDWARE_ERROR);
}
ret = hdimage->read((bx_ptr_t)r->dma_buf, r->buf_len);
if (ret < r->buf_len) {
BX_ERROR(("could not read() hard drive image file"));
scsi_command_complete(r, STATUS_CHECK_CONDITION, SENSE_HARDWARE_ERROR);
} else {
scsi_read_complete((void*)r, 0);
}
}
r->sector += n;
r->sector_count -= n;
}
void scsi_device_t::scsi_write_complete(void *req, int ret)
{
SCSIRequest *r = (SCSIRequest *)req;
Bit32u len;
if (ret) {
BX_ERROR(("IO error"));
scsi_command_complete(r, STATUS_CHECK_CONDITION, SENSE_HARDWARE_ERROR);
return;
}
if (r->sector_count == 0) {
scsi_command_complete(r, STATUS_GOOD, SENSE_NO_SENSE);
} else {
len = r->sector_count * 512;
if (len > SCSI_DMA_BUF_SIZE) {
len = SCSI_DMA_BUF_SIZE;
}
r->buf_len = len;
BX_DEBUG(("write complete tag=0x%x more=%d", r->tag, len));
completion(dev, SCSI_REASON_DATA, r->tag, len);
}
}
int scsi_device_t::scsi_write_data(Bit32u tag)
{
SCSIRequest *r;
Bit32u n;
int ret;
BX_DEBUG(("write data tag=0x%x", tag));
r = scsi_find_request(tag);
if (!r) {
BX_ERROR(("bad write tag 0x%x", tag));
scsi_command_complete(r, STATUS_CHECK_CONDITION, SENSE_HARDWARE_ERROR);
return 1;
}
if (type == SCSIDEV_TYPE_DISK) {
n = r->buf_len / 512;
if (n) {
ret = (int)hdimage->lseek(r->sector * 512, SEEK_SET);
if (ret < 0) {
BX_ERROR(("could not lseek() hard drive image file"));
scsi_command_complete(r, STATUS_CHECK_CONDITION, SENSE_HARDWARE_ERROR);
}
ret = hdimage->write((bx_ptr_t)r->dma_buf, r->buf_len);
r->sector += n;
r->sector_count -= n;
if (ret < r->buf_len) {
BX_ERROR(("could not write() hard drive image file"));
scsi_command_complete(r, STATUS_CHECK_CONDITION, SENSE_HARDWARE_ERROR);
} else {
scsi_write_complete((void*)r, 0);
}
} else {
scsi_write_complete(r, 0);
}
} else {
BX_ERROR(("CD-ROM: write not supported"));
scsi_command_complete(r, STATUS_CHECK_CONDITION, SENSE_HARDWARE_ERROR);
}
return 0;
}
Bit8u* scsi_device_t::scsi_get_buf(Bit32u tag)
{
SCSIRequest *r = scsi_find_request(tag);
if (!r) {
BX_ERROR(("bad buffer tag 0x%x", tag));
return NULL;
}
return r->dma_buf;
}
Bit32s scsi_device_t::scsi_send_command(Bit32u tag, Bit8u *buf, int lun)
{
Bit64u nb_sectors;
Bit64u lba;
Bit32s len;
int cmdlen;
int is_write;
Bit8u command;
Bit8u *outbuf;
SCSIRequest *r;
command = buf[0];
r = scsi_find_request(tag);
if (r) {
BX_ERROR(("tag 0x%x already in use", tag));
scsi_cancel_io(tag);
}
r = scsi_new_request(tag);
outbuf = r->dma_buf;
is_write = 0;
BX_DEBUG(("command: lun=%d tag=0x%x data=0x%02x", lun, tag, buf[0]));
switch (command >> 5) {
case 0:
lba = buf[3] | (buf[2] << 8) | ((buf[1] & 0x1f) << 16);
len = buf[4];
cmdlen = 6;
break;
case 1:
case 2:
lba = buf[5] | (buf[4] << 8) | (buf[3] << 16) | (buf[2] << 24);
len = buf[8] | (buf[7] << 8);
cmdlen = 10;
break;
case 4:
lba = buf[9] | (buf[8] << 8) | (buf[7] << 16) | (buf[6] << 24) |
((Bit64u)buf[5] << 32) | ((Bit64u)buf[4] << 40) |
((Bit64u)buf[3] << 48) | ((Bit64u)buf[2] << 56);
len = buf[13] | (buf[12] << 8) | (buf[11] << 16) | (buf[10] << 24);
cmdlen = 16;
break;
case 5:
lba = buf[5] | (buf[4] << 8) | (buf[3] << 16) | (buf[2] << 24);
len = buf[9] | (buf[8] << 8) | (buf[7] << 16) | (buf[6] << 24);
cmdlen = 12;
break;
default:
BX_ERROR(("Unsupported command length, command %x", command));
goto fail;
}
if (lun || buf[1] >> 5) {
BX_ERROR(("unimplemented LUN %d", lun ? lun : buf[1] >> 5));
if ((command != 0x03) && (command != 0x12)) // REQUEST SENSE and INQUIRY
goto fail;
}
switch (command) {
case 0x0:
BX_DEBUG(("Test Unit Ready"));
break;
case 0x03:
BX_DEBUG(("request Sense (len %d)", len));
if (len < 4)
goto fail;
memset(outbuf, 0, 4);
outbuf[0] = 0xf0;
outbuf[1] = 0;
outbuf[2] = sense;
r->buf_len = 4;
break;
case 0x12:
BX_DEBUG(("inquiry (len %d)", len));
if (buf[1] & 0x2) {
// Command support data - optional, not implemented
BX_ERROR(("optional INQUIRY command support request not implemented"));
goto fail;
} else if (buf[1] & 0x1) {
// Vital product data
Bit8u page_code = buf[2];
if (len < 4) {
BX_ERROR(("Error: Inquiry (EVPD[%02X]) buffer size %d is less than 4", page_code, len));
goto fail;
}
switch (page_code) {
case 0x00:
// Supported page codes, mandatory
BX_DEBUG(("Inquiry EVPD[Supported pages] buffer size %d", len));
r->buf_len = 0;
if (type == SCSIDEV_TYPE_CDROM) {
outbuf[r->buf_len++] = 5;
} else {
outbuf[r->buf_len++] = 0;
}
outbuf[r->buf_len++] = 0x00; // this page
outbuf[r->buf_len++] = 0x00;
outbuf[r->buf_len++] = 3; // number of pages
outbuf[r->buf_len++] = 0x00; // list of supported pages (this page)
outbuf[r->buf_len++] = 0x80; // unit serial number
outbuf[r->buf_len++] = 0x83; // device identification
break;
case 0x80:
{
int l;
// Device serial number, optional
if (len < 4) {
BX_ERROR(("Error: EVPD[Serial number] Inquiry buffer size %d too small, %d needed", len, 4));
goto fail;
}
BX_DEBUG(("Inquiry EVPD[Serial number] buffer size %d\n", len));
l = BX_MIN(len, (int)strlen(drive_serial_str));
r->buf_len = 0;
// Supported page codes
if (type == SCSIDEV_TYPE_CDROM) {
outbuf[r->buf_len++] = 5;
} else {
outbuf[r->buf_len++] = 0;
}
outbuf[r->buf_len++] = 0x80; // this page
outbuf[r->buf_len++] = 0x00;
outbuf[r->buf_len++] = l;
memcpy(&outbuf[r->buf_len], drive_serial_str, l);
r->buf_len += l;
}
break;
case 0x83:
{
// Device identification page, mandatory
int max_len = 255 - 8;
int id_len = strlen(DEVICE_NAME);
if (id_len > max_len)
id_len = max_len;
BX_DEBUG(("Inquiry EVPD[Device identification] buffer size %d", len));
r->buf_len = 0;
if (type == SCSIDEV_TYPE_CDROM) {
outbuf[r->buf_len++] = 5;
} else {
outbuf[r->buf_len++] = 0;
}
outbuf[r->buf_len++] = 0x83; // this page
outbuf[r->buf_len++] = 0x00;
outbuf[r->buf_len++] = 3 + id_len;
outbuf[r->buf_len++] = 0x2; // ASCII
outbuf[r->buf_len++] = 0; // not officially assigned
outbuf[r->buf_len++] = 0; // reserved
outbuf[r->buf_len++] = id_len; // length of data following
memcpy(&outbuf[r->buf_len], DEVICE_NAME, id_len);
r->buf_len += id_len;
}
break;
default:
BX_ERROR(("Error: unsupported Inquiry (EVPD[%02X]) buffer size %d", page_code, len));
goto fail;
}
// done with EVPD
break;
} else {
// Standard INQUIRY data
if (buf[2] != 0) {
BX_ERROR(("Error: Inquiry (STANDARD) page or code is non-zero [%02X]", buf[2]));
goto fail;
}
// PAGE CODE == 0
if (len < 5) {
BX_ERROR(("Error: Inquiry (STANDARD) buffer size %d is less than 5", len));
goto fail;
}
if (len < 36) {
BX_ERROR(("Error: Inquiry (STANDARD) buffer size %d is less than 36 (TODO: only 5 required)", len));
}
}
if(len > SCSI_MAX_INQUIRY_LEN)
len = SCSI_MAX_INQUIRY_LEN;
memset(outbuf, 0, len);
if (lun || buf[1] >> 5) {
outbuf[0] = 0x7f; // LUN not supported
} else if (type == SCSIDEV_TYPE_CDROM) {
outbuf[0] = 5;
outbuf[1] = 0x80;
memcpy(&outbuf[16], "BOCHS CD-ROM ", 16);
} else {
outbuf[0] = 0;
memcpy(&outbuf[16], "BOCHS HARDDISK ", 16);
}
memcpy(&outbuf[8], "BOCHS ", 8);
memcpy(&outbuf[32], "1.0", 4);
// Identify device as SCSI-3 rev 1.
// Some later commands are also implemented.
outbuf[2] = 3;
outbuf[3] = 2; // Format 2
outbuf[4] = len - 5; // Additional Length = (Len - 1) - 4
// Sync data transfer and TCQ.
outbuf[7] = 0x10 | (tcq ? 0x02 : 0);
r->buf_len = len;
break;
case 0x16:
BX_INFO(("Reserve(6)"));
if (buf[1] & 1)
goto fail;
break;
case 0x17:
BX_INFO(("Release(6)"));
if (buf[1] & 1)
goto fail;
break;
case 0x1a:
case 0x5a:
{
Bit8u *p;
int page;
page = buf[2] & 0x3f;
BX_DEBUG(("mode sense (page %d, len %d)", page, len));
p = outbuf;
memset(p, 0, 4);
outbuf[1] = 0; /* Default media type. */
outbuf[3] = 0; /* Block descriptor length. */
if (type == SCSIDEV_TYPE_CDROM) {
outbuf[2] = 0x80; /* Readonly. */
}
p += 4;
if ((page == 4) || (page == 5)) {
BX_ERROR(("mode sense: page %d not implemented", page));
}
if ((page == 8 || page == 0x3f)) {
/* Caching page. */
memset(p, 0, 20);
p[0] = 8;
p[1] = 0x12;
p[2] = 4; /* WCE */
p += 20;
}
if ((page == 0x3f || page == 0x2a)
&& (type == SCSIDEV_TYPE_CDROM)) {
/* CD Capabilities and Mechanical Status page. */
p[0] = 0x2a;
p[1] = 0x14;
p[2] = 3; // CD-R & CD-RW read
p[3] = 0; // Writing not supported
p[4] = 0x7f; /* Audio, composite, digital out,
mode 2 form 1&2, multi session */
p[5] = 0xff; /* CD DA, DA accurate, RW supported,
RW corrected, C2 errors, ISRC,
UPC, Bar code */
p[6] = 0x2d | (locked ? 2 : 0);
/* Locking supported, jumper present, eject, tray */
p[7] = 0; /* no volume & mute control, no changer */
p[8] = (50 * 176) >> 8; // 50x read speed
p[9] = (50 * 176) & 0xff;
p[10] = 0 >> 8; // No volume
p[11] = 0 & 0xff;
p[12] = 2048 >> 8; // 2M buffer
p[13] = 2048 & 0xff;
p[14] = (16 * 176) >> 8; // 16x read speed current
p[15] = (16 * 176) & 0xff;
p[18] = (16 * 176) >> 8; // 16x write speed
p[19] = (16 * 176) & 0xff;
p[20] = (16 * 176) >> 8; // 16x write speed current
p[21] = (16 * 176) & 0xff;
p += 22;
}
r->buf_len = p - outbuf;
outbuf[0] = r->buf_len - 4;
if (r->buf_len > (int)len)
r->buf_len = len;
}
break;
case 0x1b:
BX_INFO(("Start Stop Unit"));
break;
case 0x1e:
BX_INFO(("Prevent Allow Medium Removal (prevent = %d)", buf[4] & 3));
locked = buf[4] & 1;
break;
case 0x25:
BX_DEBUG(("Read Capacity"));
// The normal LEN field for this command is zero
memset(outbuf, 0, 8);
if (type == SCSIDEV_TYPE_CDROM) {
nb_sectors = cdrom->capacity();
} else {
nb_sectors = hdimage->hd_size / 512;
}
/* Returned value is the address of the last sector. */
if (nb_sectors) {
nb_sectors--;
outbuf[0] = (Bit8u)((nb_sectors >> 24) & 0xff);
outbuf[1] = (Bit8u)((nb_sectors >> 16) & 0xff);
outbuf[2] = (Bit8u)((nb_sectors >> 8) & 0xff);
outbuf[3] = (Bit8u)(nb_sectors & 0xff);
outbuf[4] = 0;
outbuf[5] = 0;
outbuf[6] = cluster_size * 2;
outbuf[7] = 0;
r->buf_len = 8;
} else {
scsi_command_complete(r, STATUS_CHECK_CONDITION, SENSE_NOT_READY);
return 0;
}
break;
case 0x08:
case 0x28:
case 0x88:
BX_DEBUG(("Read (sector "FMT_LL"d, count %d)", lba, len));
if (lba > max_lba)
goto illegal_lba;
r->sector = lba;
r->sector_count = len;
break;
case 0x0a:
case 0x2a:
case 0x8a:
BX_DEBUG(("Write (sector "FMT_LL"d, count %d)", lba, len));
if (lba > max_lba)
goto illegal_lba;
r->sector = lba;
r->sector_count = len;
is_write = 1;
break;
case 0x35:
BX_DEBUG(("Syncronise cache (sector "FMT_LL"d, count %d)", lba, len));
// TODO: flush cache
break;
case 0x43:
{
int start_track, format, msf, toclen;
if (type == SCSIDEV_TYPE_CDROM) {
msf = buf[1] & 2;
format = buf[2] & 0xf;
start_track = buf[6];
BX_DEBUG(("Read TOC (track %d format %d msf %d)", start_track, format, msf >> 1));
cdrom->read_toc(outbuf, &toclen, msf, start_track, format);
if (toclen > 0) {
if (len > toclen)
len = toclen;
r->buf_len = len;
break;
}
BX_ERROR(("Read TOC error"));
goto fail;
} else {
goto fail;
}
}
case 0x46:
BX_DEBUG(("Get Configuration (rt %d, maxlen %d)", buf[1] & 3, len));
memset(outbuf, 0, 8);
/* ??? This shoud probably return much more information. For now
just return the basic header indicating the CD-ROM profile. */
outbuf[7] = 8; // CD-ROM
r->buf_len = 8;
break;
case 0x56:
BX_INFO(("Reserve(10)"));
if (buf[1] & 3)
goto fail;
break;
case 0x57:
BX_INFO(("Release(10)"));
if (buf[1] & 3)
goto fail;
break;
case 0xa0:
BX_INFO(("Report LUNs (len %d)", len));
if (len < 16)
goto fail;
memset(outbuf, 0, 16);
outbuf[3] = 8;
r->buf_len = 16;
break;
case 0x2f:
BX_INFO(("Verify"));
break;
case 0x23: {
// USBMASS-UFI10.pdf  rev 1.0  Section 4.10
BX_INFO(("READ FORMAT CAPACITIES (MMC)"));
unsigned len = (buf[7]<<8) | buf[8];
#define OUR_LEN 12
// Cap List Header
outbuf[0] = 0;
outbuf[1] = 0;
outbuf[2] = 0;
outbuf[3] = OUR_LEN;
// Current/Max Cap Header
if (type == SCSIDEV_TYPE_CDROM) {
nb_sectors = cdrom->capacity();
} else {
nb_sectors = (hdimage->hd_size / 512);
}
/* Returned value is the address of the last sector.  */
outbuf[4] = (Bit8u)((nb_sectors >> 24) & 0xff);
outbuf[5] = (Bit8u)((nb_sectors >> 16) & 0xff);
outbuf[6] = (Bit8u)((nb_sectors >> 8) & 0xff);
outbuf[7] = (Bit8u)(nb_sectors & 0xff);
outbuf[8] = 2; // formatted (1 = unformatted)
outbuf[9] = 0;
outbuf[10] = cluster_size * 2;
outbuf[11] = 0;
r->buf_len = (len < OUR_LEN) ? len : OUR_LEN;
}
break;
default:
BX_ERROR(("Unknown SCSI command (%2.2x)", buf[0]));
fail:
scsi_command_complete(r, STATUS_CHECK_CONDITION, SENSE_ILLEGAL_REQUEST);
return 0;
illegal_lba:
scsi_command_complete(r, STATUS_CHECK_CONDITION, SENSE_HARDWARE_ERROR);
return 0;
}
if (r->sector_count == 0 && r->buf_len == 0) {
scsi_command_complete(r, STATUS_GOOD, SENSE_NO_SENSE);
}
len = r->sector_count * 512 * cluster_size + r->buf_len;
if (is_write) {
return -len;
} else {
if (!r->sector_count)
r->sector_count = -1;
return len;
}
}
#endif // BX_SUPPORT_PCI && BX_SUPPORT_PCIUSB