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scsi: Add basic support for SCSI media changer commands.

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This adds basic support for SCSI media changer commands.
Not all commands are supported as of now, but enough to cover
basic functionality.

Signed-off-by: Christian Hoff <christian.hoff@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Christian Hoff 2012-06-14 15:55:27 +02:00 • committed by Paolo Bonzini
parent 28b70c9dbd
commit 40723a99b8
2 changed files with 43 additions and 6 deletions
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45
hw/scsi-bus.c
View file

@ -770,7 +770,6 @@ static int scsi_req_length(SCSICommand *cmd, SCSIDevice *dev, uint8_t *buf)
case SET_CD_SPEED:
case SET_LIMITS:
case WRITE_LONG_10:
case MOVE_MEDIUM:
case UPDATE_BLOCK:
case RESERVE_TRACK:
case SET_READ_AHEAD:
@ -914,6 +913,29 @@ static int scsi_req_stream_length(SCSICommand *cmd, SCSIDevice *dev, uint8_t *bu
return 0;
}
static int scsi_req_medium_changer_length(SCSICommand *cmd, SCSIDevice *dev, uint8_t *buf)
{
switch (buf[0]) {
/* medium changer commands */
case EXCHANGE_MEDIUM:
case INITIALIZE_ELEMENT_STATUS:
case INITIALIZE_ELEMENT_STATUS_WITH_RANGE:
case MOVE_MEDIUM:
case POSITION_TO_ELEMENT:
cmd->xfer = 0;
break;
case READ_ELEMENT_STATUS:
cmd->xfer = buf[9] | (buf[8] << 8) | (buf[7] << 16);
break;
/* generic commands */
default:
return scsi_req_length(cmd, dev, buf);
}
return 0;
}
static void scsi_cmd_xfer_mode(SCSICommand *cmd)
{
if (!cmd->xfer) {
@ -1011,11 +1033,18 @@ int scsi_req_parse(SCSICommand *cmd, SCSIDevice *dev, uint8_t *buf)
return -1;
}
if (dev->type == TYPE_TAPE) {
switch (dev->type) {
case TYPE_TAPE:
rc = scsi_req_stream_length(cmd, dev, buf);
} else {
break;
case TYPE_MEDIUM_CHANGER:
rc = scsi_req_medium_changer_length(cmd, dev, buf);
break;
default:
rc = scsi_req_length(cmd, dev, buf);
break;
}
if (rc != 0)
return rc;
@ -1193,7 +1222,8 @@ static const char *scsi_command_name(uint8_t cmd)
[ REQUEST_SENSE ] = "REQUEST_SENSE",
[ FORMAT_UNIT ] = "FORMAT_UNIT",
[ READ_BLOCK_LIMITS ] = "READ_BLOCK_LIMITS",
[ REASSIGN_BLOCKS ] = "REASSIGN_BLOCKS",
[ REASSIGN_BLOCKS ] = "REASSIGN_BLOCKS/INITIALIZE ELEMENT STATUS",
/* LOAD_UNLOAD and INITIALIZE_ELEMENT_STATUS use the same operation code */
[ READ_6 ] = "READ_6",
[ WRITE_6 ] = "WRITE_6",
[ SET_CAPACITY ] = "SET_CAPACITY",
@ -1218,7 +1248,8 @@ static const char *scsi_command_name(uint8_t cmd)
[ READ_CAPACITY_10 ] = "READ_CAPACITY_10",
[ READ_10 ] = "READ_10",
[ WRITE_10 ] = "WRITE_10",
[ SEEK_10 ] = "SEEK_10",
[ SEEK_10 ] = "SEEK_10/POSITION_TO_ELEMENT",
/* SEEK_10 and POSITION_TO_ELEMENT use the same operation code */
[ WRITE_VERIFY_10 ] = "WRITE_VERIFY_10",
[ VERIFY_10 ] = "VERIFY_10",
[ SEARCH_HIGH ] = "SEARCH_HIGH",
@ -1229,7 +1260,8 @@ static const char *scsi_command_name(uint8_t cmd)
/* READ_POSITION and PRE_FETCH use the same operation code */
[ SYNCHRONIZE_CACHE ] = "SYNCHRONIZE_CACHE",
[ LOCK_UNLOCK_CACHE ] = "LOCK_UNLOCK_CACHE",
[ READ_DEFECT_DATA ] = "READ_DEFECT_DATA",
[ READ_DEFECT_DATA ] = "READ_DEFECT_DATA/INITIALIZE_ELEMENT_STATUS_WITH_RANGE",
/* READ_DEFECT_DATA and INITIALIZE_ELEMENT_STATUS_WITH_RANGE use the same operation code */
[ MEDIUM_SCAN ] = "MEDIUM_SCAN",
[ COMPARE ] = "COMPARE",
[ COPY_VERIFY ] = "COPY_VERIFY",
@ -1274,6 +1306,7 @@ static const char *scsi_command_name(uint8_t cmd)
[ REPORT_LUNS ] = "REPORT_LUNS",
[ BLANK ] = "BLANK",
[ MOVE_MEDIUM ] = "MOVE_MEDIUM",
[ EXCHANGE_MEDIUM ] = "EXCHANGE MEDIUM",
[ LOAD_UNLOAD ] = "LOAD_UNLOAD",
[ READ_12 ] = "READ_12",
[ WRITE_12 ] = "WRITE_12",