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sim_scsi.c
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sim_scsi.c
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/* sim_scsi.c: SCSI bus simulation
Copyright (c) 2019, Matt Burke
Permission is hereby granted, free of charge, to any person obtaining a
copy of this software and associated documentation files (the "Software"),
to deal in the Software without restriction, including without limitation
the rights to use, copy, modify, merge, publish, distribute, sublicense,
and/or sell copies of the Software, and to permit persons to whom the
Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
Except as contained in this notice, the name of the author shall not be
used in advertising or otherwise to promote the sale, use or other dealings
in this Software without prior written authorization from the author.
*/
#include "sim_scsi.h"
#include "sim_disk.h"
#include "sim_tape.h"
/* SCSI commands */
#define CMD_TESTRDY 0x00 /* test unit ready */
#define CMD_INQUIRY 0x12 /* inquiry */
#define CMD_REQSENSE 0x03 /* request sense */
#define CMD_RDBLKLIM 0x05 /* read block limits */
#define CMD_MODESEL6 0x15 /* mode select (6 bytes) */
#define CMD_MODESEL10 0x55 /* mode select (10 bytes) */
#define CMD_MODESENSE6 0x1A /* mode sense (6 bytes) */
#define CMD_MODESENSE10 0x5A /* mode sense (10 bytes) */
#define CMD_STARTSTOP 0x1B /* start/stop unit */
#define CMD_LOADUNLOAD 0x1B /* load/unload unit */
#define CMD_PREVALLOW 0x1E /* prevent/allow medium removal */
#define CMD_RDCAP 0x25 /* read capacity */
#define CMD_READ6 0x08 /* read (6 bytes) */
#define CMD_READ10 0x28 /* read (10 bytes) */
#define CMD_RDLONG 0x3E /* read long */
#define CMD_WRITE6 0x0A /* write (6 bytes) */
#define CMD_WRITE10 0x2A /* write (10 bytes) */
#define CMD_ERASE 0x19 /* erase */
#define CMD_RESERVE 0x16 /* reserve unit */
#define CMD_RELEASE 0x17 /* release unit */
#define CMD_REWIND 0x01 /* rewind */
#define CMD_SNDDIAG 0x1D /* send diagnostic */
#define CMD_SPACE 0x11 /* space */
#define CMD_WRFMARK 0x10 /* write filemarks */
#define CMD_READ6_TAPE_FIXED 0x01 /* Fixed record size read */
#define CMD_READ6_TAPE_SILI 0x02 /* Suppress Incorrect Length Indicator */
/* SCSI status codes */
#define STS_OK 0 /* good */
#define STS_CHK 2 /* check condition */
/* SCSI sense keys */
#define KEY_OK 0 /* no sense */
#define KEY_NOTRDY 2 /* not ready */
#define KEY_ILLREQ 5 /* illegal request */
#define KEY_PROT 7 /* data protect */
#define KEY_BLANK 8 /* blank check */
#define KEY_M_ILI 0x20 /* incorrent length indicator */
/* Additional sense codes */
#define ASC_OK 0 /* no additional sense information */
#define ASC_INVCOM 0x20 /* invalid command operation code */
#define ASC_INVCDB 0x24 /* invalid field in cdb */
#define ASC_NOMEDIA 0x3A /* media not present */
#define PUTL(b,x,v) b[x] = (v >> 24) & 0xFF; \
b[x+1] = (v >> 16) & 0xFF; \
b[x+2] = (v >> 8) & 0xFF; \
b[x+3] = v & 0xFF
#define PUTW(b,x,v) b[x] = (v >> 8) & 0xFF; \
b[x+1] = v & 0xFF
#define GETL(b,x) ((b[x] << 24) | \
(b[x+1] << 16) | \
(b[x+2] << 8) | \
b[x+3])
#define GETW(b,x) ((b[x] << 8)|b[x+1])
static void _scsi_vdebug (uint32 dbits, SCSI_BUS *bus, const char* fmt, va_list arglist)
{
UNIT *uptr = bus->dev[bus->target];
size_t tfmt_size = strlen (fmt) + strlen (sim_uname (uptr)) + 3;
char *tfmt = (char *)malloc (tfmt_size);
snprintf (tfmt, tfmt_size, "%s: %s", sim_uname (uptr), fmt);
_sim_vdebug (dbits, bus->dptr, uptr, tfmt, arglist);
free (tfmt);
}
static void scsi_debug_cmd (SCSI_BUS *bus, const char* fmt, ...)
{
va_list arglist;
va_start (arglist, fmt);
_scsi_vdebug (SCSI_DBG_CMD, bus, fmt, arglist);
va_end (arglist);
}
static const char *scsi_phases[] = {
"DATO", /* data out */
"DATI", /* data in */
"CMD", /* command */
"STS", /* status */
"", /* invalid*/
"", /* invalid*/
"MSGO", /* message out */
"MSGI" /* message in */
};
/* Arbitrate for control of the bus */
t_bool scsi_arbitrate (SCSI_BUS *bus, uint32 initiator)
{
if (bus->initiator < 0) { /* bus free? */
sim_debug (SCSI_DBG_BUS, bus->dptr,
"Initiator %d won arbitration\n", initiator);
bus->initiator = initiator; /* won arbitration */
return TRUE;
}
sim_debug (SCSI_DBG_BUS, bus->dptr,
"Initiator %d lost arbitration\n", initiator);
return FALSE; /* lost arbitration */
}
/* Release control of the bus */
void scsi_release (SCSI_BUS *bus)
{
if (bus->initiator < 0) /* already free? */
return;
sim_debug (SCSI_DBG_BUS, bus->dptr,
"Initiator %d released bus\n", bus->initiator);
bus->phase = SCSI_DATO; /* bus free state */
bus->initiator = -1;
bus->target = -1;
bus->buf_t = bus->buf_b = 0;
}
/* Assert the attention signal */
void scsi_set_atn (SCSI_BUS *bus)
{
sim_debug (SCSI_DBG_BUS, bus->dptr,
"Attention signal asserted\n");
bus->atn = TRUE; /* assert ATN */
if (bus->target != -1) /* target selected? */
bus->phase = SCSI_MSGO; /* go to msg out phase */
}
/* Clear the attention signal */
void scsi_release_atn (SCSI_BUS *bus)
{
sim_debug (SCSI_DBG_BUS, bus->dptr,
"Attention signal cleared\n");
bus->atn = FALSE; /* release ATN */
}
/* Assert the request signal */
void scsi_set_req (SCSI_BUS *bus)
{
if (bus->req == FALSE) {
sim_debug (SCSI_DBG_BUS, bus->dptr,
"Request signal asserted\n");
bus->req = TRUE; /* assert REQ */
}
}
/* Clear the attention signal */
void scsi_release_req (SCSI_BUS *bus)
{
if (bus->req == TRUE) {
sim_debug (SCSI_DBG_BUS, bus->dptr,
"Request signal cleared\n");
bus->req = FALSE; /* release REQ */
}
}
void scsi_set_phase (SCSI_BUS *bus, uint32 phase)
{
if (bus->phase != phase) {
sim_debug (SCSI_DBG_BUS, bus->dptr,
"Phase changed to %s\n", scsi_phases[phase]);
bus->phase = phase;
}
}
/* Attempt to select a target device */
t_bool scsi_select (SCSI_BUS *bus, uint32 target)
{
UNIT *uptr = bus->dev[target];
if (bus->initiator < 0) {
sim_debug (SCSI_DBG_BUS, bus->dptr,
"SCSI: Attempted to select a target without arbitration\n");
return FALSE;
}
if (bus->target >= 0) {
sim_debug (SCSI_DBG_BUS, bus->dptr,
"SCSI: Attempted to select a target when a target is already selected\n");
return FALSE;
}
if ((uptr->flags & UNIT_DIS) == 0) { /* unit enabled? */
sim_debug (SCSI_DBG_BUS, bus->dptr,
"Select target %d%s\n", target, (bus->atn ? " with attention" : ""));
if (bus->atn)
scsi_set_phase (bus, SCSI_MSGO); /* message out */
else
scsi_set_phase (bus, SCSI_CMD); /* command */
bus->target = target;
scsi_set_req (bus); /* request data */
return TRUE;
}
sim_debug (SCSI_DBG_BUS, bus->dptr,
"Select timeout for target %d\n", target);
scsi_release (bus);
return FALSE;
}
/* Process a SCSI message */
uint32 scsi_message (SCSI_BUS *bus, uint8 *data, uint32 len)
{
uint32 used;
if (data[0] & 0x80) { /* identify */
bus->lun = (data[0] & 0xF);
sim_debug (SCSI_DBG_MSG, bus->dptr,
"Identify, LUN = %d\n", bus->lun);
scsi_set_req (bus); /* request data */
used = 1; /* message length */
}
else if (data[0] == 0x1) { /* extended message */
if (len < 2)
return 0; /* need more */
if (len < (data[1] + 2u))
return 0; /* need more */
sim_debug (SCSI_DBG_MSG, bus->dptr,
"Extended message\n");
scsi_set_req (bus); /* request data */
used = data[1] + 2; /* extended message length */
}
else if (data[0] == 0x6) { /* abort */
sim_debug (SCSI_DBG_MSG, bus->dptr,
"Abort\n");
scsi_release (bus); /* disconnect */
used = 1;
}
else if (data[0] == 0xc) {
sim_debug (SCSI_DBG_MSG, bus->dptr,
"Bus device reset\n");
scsi_release (bus); /* disconnect */
used = 1;
}
else {
sim_printf ("SCSI: Unknown Message %02X\n", data[0]);
used = len; /* discard all bytes */
}
scsi_set_phase (bus, SCSI_CMD); /* command phase next */
return used;
}
/* Send status to the initiator immediately */
void scsi_status (SCSI_BUS *bus, uint32 sts, uint32 key, uint32 asc)
{
bus->sense_key = key;
bus->sense_code = asc;
bus->buf[0] = sts; /* status code */
bus->buf_b = 1;
scsi_set_phase (bus, SCSI_STS); /* status phase next */
scsi_set_req (bus); /* request to send data */
}
/* Send status to the initiator at the end of transaction */
void scsi_status_deferred (SCSI_BUS *bus, uint32 sts, uint32 key, uint32 asc)
{
bus->status = sts;
bus->sense_key = key;
bus->sense_code = asc;
}
/* Decode the command group to get the command length */
uint32 scsi_decode_group (uint8 data)
{
uint32 group = (data >> 5) & 0x7;
switch (group) {
case 0: /* 6 byte commands */
return 6;
case 1: /* 10 byte commands */
case 2:
return 10;
case 3: /* 12 byte commands */
return 12;
default: /* vendor specific or reserved */
return 0;
}
}
/* Translate sim_tape status to SCSI status */
void scsi_tape_status (SCSI_BUS *bus, t_stat st)
{
switch (st) {
case MTSE_OK:
scsi_status_deferred (bus, STS_OK, KEY_OK, ASC_OK);
break;
case MTSE_TMK:
scsi_status_deferred (bus, STS_CHK, (KEY_OK | 0x80), ASC_OK);
bus->sense_qual = 1; /* filemark detected */
break;
case MTSE_RECE: /* record in error */
case MTSE_INVRL: /* invalid rec lnt */
case MTSE_IOERR: /* IO error */
scsi_status_deferred (bus, STS_CHK, KEY_OK, ASC_OK);
break;
case MTSE_FMT:
case MTSE_UNATT:
case MTSE_EOM: /* end of medium */
scsi_status_deferred (bus, STS_CHK, (KEY_BLANK | 0x40), ASC_OK);
break;
case MTSE_BOT: /* reverse into BOT */
scsi_status_deferred (bus, STS_CHK, (KEY_OK | 0x40), ASC_OK);
break;
case MTSE_WRP: /* write protect */
scsi_status_deferred (bus, STS_CHK, KEY_PROT, ASC_OK);
break;
}
return;
}
/* Limit the transfer count to the allocation specified
by the SCSI command */
void scsi_check_alloc (SCSI_BUS *bus, uint32 alloc)
{
if (bus->buf_b > alloc) /* check allocation */
bus->buf_b = alloc;
}
/* Command - Test Unit Ready */
void scsi_test_ready (SCSI_BUS *bus, uint8 *data, uint32 len)
{
UNIT *uptr = bus->dev[bus->target];
scsi_debug_cmd (bus, "Test Unit Ready\n");
if (uptr->flags & UNIT_ATT) /* attached? */
scsi_status (bus, STS_OK, KEY_OK, ASC_OK); /* unit is ready */
else
scsi_status (bus, STS_CHK, KEY_NOTRDY, ASC_NOMEDIA); /* no media present */
}
/* Command - Inquiry */
void scsi_inquiry (SCSI_BUS *bus, uint8 *data, uint32 len)
{
UNIT *uptr = bus->dev[bus->target];
scsi_debug_cmd (bus, "Inquiry\n");
if ((bus->lun != 0) || (uptr->flags & UNIT_DIS)) {
memset (&bus->buf[0], 0, 36); /* no such device or lun */
bus->buf[0] = 0x7f;
bus->buf_b += 36;
// scsi_status (bus, STS_CHK, KEY_ILLREQ, ASC_INVCOM);
}
else {
bus->buf[bus->buf_b++] = (uptr->drvtyp->pqual << 5) | uptr->drvtyp->devtype; /* device class */
#if 0
if (data[0] & 0x01) { /* vital product data */
switch (data[2]) { /* page code */
case 0x00: /* list of supported pages */
bus->buf[bus->buf_b++] = 0x00; /* page code */
bus->buf[bus->buf_b++] = 0x00; /* reserved */
bus->buf[bus->buf_b++] = 0x02; /* page length */
bus->buf[bus->buf_b++] = 0x00; /* page 0 is supported. */
bus->buf[bus->buf_b++] = 0x80; /* page 0x80 is supported. */
break;
case 0x80: /* unit serial # page */
bus->buf[bus->buf_b++] = 0x80; /* page code */
bus->buf[bus->buf_b++] = 0x00; /* reserved */
bus->buf[bus->buf_b++] = 4; /* serial number length */
sprintf (&bus->buf[l], "%-4s", "1234");
l += 4;
break;
default:
sim_printf ("SCSI: Vital product data page %02x not implemented\n", data[2]);
}
}
#endif
if (uptr->drvtyp->flags & DRVFL_RMV)
bus->buf[bus->buf_b++] = 0x80; /* removeable */
else
bus->buf[bus->buf_b++] = 0; /* fixed */
bus->buf[bus->buf_b++] = uptr->drvtyp->scsiver; /* versions */
bus->buf[bus->buf_b++] = uptr->drvtyp->scsiver; /* respose data format */
bus->buf[bus->buf_b++] = 31; /* additional length */
bus->buf[bus->buf_b++] = 0; /* reserved */
bus->buf[bus->buf_b++] = 0; /* reserved */
bus->buf[bus->buf_b++] = 0;
sprintf ((char *)&bus->buf[bus->buf_b], "%-8s", uptr->drvtyp->manufacturer);
bus->buf_b += 8;
sprintf ((char *)&bus->buf[bus->buf_b], "%-16s", uptr->drvtyp->product);
bus->buf_b += 16;
sprintf ((char *)&bus->buf[bus->buf_b], "%-4s", uptr->drvtyp->rev);
bus->buf_b += 4;
}
scsi_check_alloc (bus, data[4]); /* check allocation */
scsi_set_phase (bus, SCSI_DATI); /* data in phase next */
scsi_set_req (bus); /* request to send data */
}
/* Command - Request Sense */
void scsi_req_sense (SCSI_BUS *bus, uint8 *data, uint32 len)
{
scsi_debug_cmd (bus, "Request Sense\n");
bus->buf[bus->buf_b++] = (0x70 | 0x80); /* current error, valid */
bus->buf[bus->buf_b++] = 0; /* segment # */
bus->buf[bus->buf_b++] = bus->sense_key; /* sense key */
bus->buf[bus->buf_b++] = (bus->sense_info >> 24) & 0xFF; /* information */
bus->buf[bus->buf_b++] = (bus->sense_info >> 16) & 0xFF;
bus->buf[bus->buf_b++] = (bus->sense_info >> 8) & 0xFF;
bus->buf[bus->buf_b++] = bus->sense_info & 0xFF;
bus->buf[bus->buf_b++] = 10; /* additional length */
bus->buf[bus->buf_b++] = 0; /* cmd specific info */
bus->buf[bus->buf_b++] = 0;
bus->buf[bus->buf_b++] = 0;
bus->buf[bus->buf_b++] = 0;
bus->buf[bus->buf_b++] = bus->sense_code; /* ASC */
bus->buf[bus->buf_b++] = bus->sense_qual; /* ASCQ */
bus->buf[bus->buf_b++] = 0; /* FRU code */
bus->buf[bus->buf_b++] = 0; /* sense key specific */
bus->buf[bus->buf_b++] = 0;
bus->buf[bus->buf_b++] = 0;
bus->sense_key = 0; /* no sense */
bus->sense_code = 0; /* no additional sense information */
bus->sense_qual = 0;
bus->sense_info = 0;
scsi_check_alloc (bus, data[4]); /* check allocation */
scsi_set_phase (bus, SCSI_DATI); /* data in phase next */
scsi_set_req (bus); /* request to send data */
}
/* Command - Mode Select (6 byte command) */
void scsi_mode_sel6 (SCSI_BUS *bus, uint8 *data, uint32 len)
{
UNIT *uptr = bus->dev[bus->target];
uint32 blk_size;
if (bus->phase == SCSI_CMD) {
scsi_debug_cmd (bus, "Mode Select(6) - CMD\n");
memcpy (&bus->cmd[0], &data[0], 6);
bus->buf_b = bus->cmd[4];
scsi_set_phase (bus, SCSI_DATO); /* data out phase next */
scsi_set_req (bus); /* request data */
}
else if (bus->phase == SCSI_DATO) {
scsi_debug_cmd (bus, "Mode Select(6) - DATO\n");
if ((DRVFL_GET_IFTYPE(uptr->drvtyp) == SCSI_TAPE) &&
(uptr->drvtyp->flags & DRVFL_QICTAPE)) {
blk_size = ((uint32)bus->buf[9]) << 16 |
((uint32)bus->buf[10]) << 8 |
(uint32)bus->buf[11];
/* QIC tape ONLY supports requesting a fixed block size of
* 0x200 bytes. Any other block size will cause an illegal
* request. */
if (blk_size == uptr->drvtyp->sectsize) {
scsi_status(bus, STS_OK, KEY_OK, ASC_OK);
}
else {
scsi_status(bus, STS_CHK, KEY_ILLREQ|KEY_M_ILI, ASC_INVCDB);
}
}
else {
/* Not implemented for disk and non-QIC tape */
scsi_status(bus, STS_OK, KEY_OK, ASC_OK);
}
}
}
/* Command - Mode Select (10 byte command) */
void scsi_mode_sel10 (SCSI_BUS *bus, uint8 *data, uint32 len)
{
if (bus->phase == SCSI_CMD) {
scsi_debug_cmd (bus, "Mode Select(10) - CMD\n");
memcpy (&bus->cmd[0], &data[0], 10);
bus->buf_b = GETW (data, 7);
scsi_set_phase (bus, SCSI_DATO); /* data out phase next */
scsi_set_req (bus); /* request data */
}
else if (bus->phase == SCSI_DATO) {
scsi_debug_cmd (bus, "Mode Select(6) - DATO\n");
/* Not currently implemented so just return
good status for now */
scsi_status (bus, STS_OK, KEY_OK, ASC_OK);
}
}
/* Mode Sense common fields */
void scsi_mode_sense (SCSI_BUS *bus, uint8 *data, uint32 len)
{
UNIT *uptr = bus->dev[bus->target];
uint32 pc, pctl;
pc = data[2] & 0x3F; /* page code */
pctl = (data[2] >> 6) & 0x3F; /* page control */
bus->buf[bus->buf_b++] = 0x00; /* density code */
bus->buf[bus->buf_b++] = ((uptr->capac - 1) >> 16) & 0xFF; /* # blocks (23:16) */
bus->buf[bus->buf_b++] = ((uptr->capac - 1) >> 8) & 0xFF; /* # blocks (15:8) */
bus->buf[bus->buf_b++] = (uptr->capac - 1) & 0xFF; /* # blocks (7:0) */
bus->buf[bus->buf_b++] = 0x00; /* reserved */
bus->buf[bus->buf_b++] = (uptr->drvtyp->sectsize >> 16) & 0xFF;
bus->buf[bus->buf_b++] = (uptr->drvtyp->sectsize >> 8) & 0xFF;
bus->buf[bus->buf_b++] = (uptr->drvtyp->sectsize >> 0) & 0xFF;
if ((pc == 0x1) || (pc == 0x3F)) {
bus->buf[bus->buf_b++] = 0x1; /* R/W error recovery page */
bus->buf[bus->buf_b++] = 0xA; /* page length */
bus->buf[bus->buf_b++] = 0x26; /* TB, PER, DTE */
bus->buf[bus->buf_b++] = 0x8; /* read retry count */
bus->buf[bus->buf_b++] = 0x78; /* correction span */
bus->buf[bus->buf_b++] = 0;
bus->buf[bus->buf_b++] = 0;
bus->buf[bus->buf_b++] = 0;
bus->buf[bus->buf_b++] = 0x8; /* write retry count */
bus->buf[bus->buf_b++] = 0;
bus->buf[bus->buf_b++] = 0;
bus->buf[bus->buf_b++] = 0;
}
if ((pc == 0x2) || (pc == 0x3F)) {
bus->buf[bus->buf_b++] = 0x2; /* disconnect-reconnect page */
bus->buf[bus->buf_b++] = 0xE; /* page length */
bus->buf[bus->buf_b++] = 0x10; /* buffer full ratio */
bus->buf[bus->buf_b++] = 0x10; /* buffer empty ratio */
bus->buf[bus->buf_b++] = 0;
bus->buf[bus->buf_b++] = 0;
bus->buf[bus->buf_b++] = 0;
bus->buf[bus->buf_b++] = 0;
bus->buf[bus->buf_b++] = 0;
bus->buf[bus->buf_b++] = 0;
bus->buf[bus->buf_b++] = 0;
bus->buf[bus->buf_b++] = 0;
bus->buf[bus->buf_b++] = 0;
bus->buf[bus->buf_b++] = 0;
bus->buf[bus->buf_b++] = 0;
bus->buf[bus->buf_b++] = 0;
}
if ((pc == 0x3) || (pc == 0x3F)) {
bus->buf[bus->buf_b++] = 0x3; /* format device page */
bus->buf[bus->buf_b++] = 0x16; /* page length */
bus->buf[bus->buf_b++] = 0; /* tracks per zone (15:8) */
bus->buf[bus->buf_b++] = 1; /* tracks per zone (7:0) */
bus->buf[bus->buf_b++] = 0; /* alt sectors per zone (15:8) */
bus->buf[bus->buf_b++] = 1; /* alt sectors per zone (7:0) */
bus->buf[bus->buf_b++] = 0; /* alt tracks per zone (15:8) */
bus->buf[bus->buf_b++] = 0; /* alt tracks per zone (7:0) */
bus->buf[bus->buf_b++] = 0; /* alt tracks per unit (15:8) */
bus->buf[bus->buf_b++] = 0; /* alt tracks per unit (7:0) */
bus->buf[bus->buf_b++] = 0; /* sectors per track (15:8) */
bus->buf[bus->buf_b++] = 0x21; /* sectors per track (7:0) */
bus->buf[bus->buf_b++] = 0x2; /* bytes per sector (15:8) */
bus->buf[bus->buf_b++] = 0; /* bytes per sector (7:0) */
bus->buf[bus->buf_b++] = 0; /* interleave (15:8) */
bus->buf[bus->buf_b++] = 0; /* interleave (7:0) */
bus->buf[bus->buf_b++] = 0; /* track skew factor (15:8) */
bus->buf[bus->buf_b++] = 0; /* track skew factor (7:0) */
bus->buf[bus->buf_b++] = 0; /* cyl skew factor (15:8) */
bus->buf[bus->buf_b++] = 0; /* cyl skew factor (7:0) */
bus->buf[bus->buf_b++] = 0x40; /* flags */
bus->buf[bus->buf_b++] = 0; /* reserved */
bus->buf[bus->buf_b++] = 0; /* reserved */
bus->buf[bus->buf_b++] = 0; /* reserved */
}
if ((pc == 0x4) || (pc == 0x3F)) {
bus->buf[bus->buf_b++] = 0x4; /* rigid disk geometry page */
bus->buf[bus->buf_b++] = 0x16; /* page length */
bus->buf[bus->buf_b++] = 0; /* # cyls (23:16) */
bus->buf[bus->buf_b++] = 0x4; /* # cyls (15:8) */
bus->buf[bus->buf_b++] = 0; /* # cyls (7:0) */
bus->buf[bus->buf_b++] = 0x2; /* # heads */
bus->buf[bus->buf_b++] = 0; /* start cyl for write precomp (23:16) */
bus->buf[bus->buf_b++] = 0x4; /* start cyl for write precomp (15:8) */
bus->buf[bus->buf_b++] = 0; /* start cyl for write precomp (7:0) */
bus->buf[bus->buf_b++] = 0; /* start cyl for reduced write current (23:16) */
bus->buf[bus->buf_b++] = 0x4; /* start cyl for reduced write current (15:8) */
bus->buf[bus->buf_b++] = 0; /* start cyl for reduced write current (7:0) */
bus->buf[bus->buf_b++] = 0; /* drive step rate (15:8) */
bus->buf[bus->buf_b++] = 0x1; /* drive step rate (7:0) */
bus->buf[bus->buf_b++] = 0; /* landing zone cyl (23:16) */
bus->buf[bus->buf_b++] = 0x4; /* landing zone cyl (15:8) */
bus->buf[bus->buf_b++] = 0; /* landing zone cyl (7:0) */
bus->buf[bus->buf_b++] = 0; /* reserved, RPL */
bus->buf[bus->buf_b++] = 0; /* rotational offet */
bus->buf[bus->buf_b++] = 0; /* reserved */
bus->buf[bus->buf_b++] = 0x1C; /* medium rotation rate (15:8) */
bus->buf[bus->buf_b++] = 0x20; /* medium rotation rate (7:0) */
bus->buf[bus->buf_b++] = 0; /* reserved */
bus->buf[bus->buf_b++] = 0; /* reserved */
}
if ((pc == 0xA) || (pc == 0x3F)) {
bus->buf[bus->buf_b++] = 0xA; /* control mode page */
bus->buf[bus->buf_b++] = 0x6; /* page length */
bus->buf[bus->buf_b++] = 0;
bus->buf[bus->buf_b++] = 0;
bus->buf[bus->buf_b++] = 0;
bus->buf[bus->buf_b++] = 0;
bus->buf[bus->buf_b++] = 0;
bus->buf[bus->buf_b++] = 0;
}
}
/* Command - Mode Sense (6 byte command) */
void scsi_mode_sense6 (SCSI_BUS *bus, uint8 *data, uint32 len)
{
UNIT *uptr = bus->dev[bus->target];
uint32 pc, pctl;
scsi_debug_cmd (bus, "Mode Sense(6)\n");
pc = data[2] & 0x3F; /* page code */
pctl = (data[2] >> 6) & 0x3F; /* page control */
if (pc == 0x8) {
scsi_status (bus, STS_CHK, KEY_ILLREQ, ASC_INVCDB);
return;
}
memset (&bus->buf[0], 0, data[4]); /* allocation len */
bus->buf[bus->buf_b++] = 0x0; /* mode data length */
bus->buf[bus->buf_b++] = 0x0; /* medium type */
if (uptr->drvtyp->devtype == SCSI_CDROM)
bus->buf[bus->buf_b++] = 0x80; /* dev specific param */
else
bus->buf[bus->buf_b++] = 0x0; /* dev specific param */
bus->buf[bus->buf_b++] = 0x8; /* block descriptor len */
scsi_mode_sense (bus, data, len); /* get common data */
bus->buf[0] = bus->buf_b - 1; /* mode data length */
scsi_check_alloc (bus, data[4]); /* check allocation */
scsi_set_phase (bus, SCSI_DATI);
scsi_set_req (bus); /* request to send data */
}
/* Command - Mode Sense (10 byte command) */
void scsi_mode_sense10 (SCSI_BUS *bus, uint8 *data, uint32 len)
{
uint32 pc, pctl;
scsi_debug_cmd (bus, "Mode Sense(10)\n");
pc = data[2] & 0x3F; /* page code */
pctl = (data[2] >> 6) & 0x3F; /* page control */
if (pc == 0x8) {
scsi_status (bus, STS_CHK, KEY_ILLREQ, ASC_INVCDB);
return;
}
memset (&bus->buf[0], 0, GETW (data, 7)); /* allocation len */
bus->buf[bus->buf_b++] = 0x0; /* mode data length (15:8) */
bus->buf[bus->buf_b++] = 0x0; /* mode data length (7:0) */
bus->buf[bus->buf_b++] = 0x0; /* medium type */
bus->buf[bus->buf_b++] = 0x0; /* dev specific param */
bus->buf[bus->buf_b++] = 0x0; /* reserved */
bus->buf[bus->buf_b++] = 0x0; /* reserved */
bus->buf[bus->buf_b++] = 0x0; /* block descriptor len (15:8) */
bus->buf[bus->buf_b++] = 0x8; /* block descriptor len (7:0) */
scsi_mode_sense (bus, data, len); /* get common data */
PUTW (bus->buf, 0, (bus->buf_b - 1)); /* mode data length */
scsi_check_alloc (bus, GETW (data, 7)); /* check allocation */
scsi_set_phase (bus, SCSI_DATI);
scsi_set_req (bus); /* request to send data */
}
/* Command - Start/Stop Unit */
void scsi_start_stop (SCSI_BUS *bus, uint8 *data, uint32 len)
{
scsi_debug_cmd (bus, "Start/Stop Unit\n");
scsi_status (bus, STS_OK, KEY_OK, ASC_OK);
}
/* Command - Prevent/Allow Medium Removal */
void scsi_prev_allow (SCSI_BUS *bus, uint8 *data, uint32 len)
{
scsi_debug_cmd (bus, "Prevent/Allow Medium Removal\n");
scsi_status (bus, STS_OK, KEY_OK, ASC_OK);
}
/* Command - Read Capacity */
void scsi_read_capacity (SCSI_BUS *bus, uint8 *data, uint32 len)
{
UNIT *uptr = bus->dev[bus->target];
scsi_debug_cmd (bus, "Read Capacity, pmi = %d\n", (data[8] & 0x1));
if ((uptr->flags & UNIT_ATT) == 0) { /* not attached? */
scsi_status (bus, STS_CHK, KEY_NOTRDY, ASC_NOMEDIA);
return;
}
PUTL (bus->buf, 0, (uptr->capac - 1)); /* LBN of last block is 1 less than # blocks */
PUTL (bus->buf, 4, uptr->drvtyp->sectsize); /* block size */
bus->buf_b = 8;
scsi_set_phase (bus, SCSI_DATI); /* data in phase next */
scsi_set_req (bus); /* request to send data */
}
/* Command - Read (6 byte command), disk version */
void scsi_read6_disk (SCSI_BUS *bus, uint8 *data, uint32 len)
{
UNIT *uptr = bus->dev[bus->target];
t_lba lba;
t_seccnt sects, sectsread;
t_stat r;
lba = GETW (data, 2) | ((data[1] & 0x1F) << 16);
sects = data[4];
if (sects == 0)
sects = 256;
scsi_debug_cmd (bus, "Read(6) lba %d blks %d\n", lba, sects);
if (uptr->flags & UNIT_ATT)
r = sim_disk_rdsect (uptr, lba, &bus->buf[0], §sread, sects);
else {
memset (&bus->buf[0], 0, (sects * uptr->drvtyp->sectsize));
sectsread = sects;
}
bus->buf_b = (sectsread * uptr->drvtyp->sectsize);
scsi_set_phase (bus, SCSI_DATI); /* data in phase next */
scsi_set_req (bus); /* request to send data */
}
/* Command - Read (6 byte command), tape version */
void scsi_read6_tape (SCSI_BUS *bus, uint8 *data, uint32 len)
{
UNIT *uptr = bus->dev[bus->target];
t_seccnt sects, sectsread, new_buf_b;
t_stat r;
uint32 i;
if ((data[1] & 0x3) == 0x3) { /* SILI and FIXED? */
scsi_status (bus, STS_CHK, KEY_ILLREQ, ASC_INVCDB);
return;
}
sects = GETW (data, 3) | (data[2] << 16);
new_buf_b = 0;
sectsread = 0;
if (sects == 0) { /* no data to read */
scsi_status (bus, STS_OK, KEY_OK, ASC_OK);
return;
}
scsi_debug_cmd (bus, "Read(6) blks %d fixed %d\n", sects, (data[1] & 0x1));
if (uptr->flags & UNIT_ATT) {
if (uptr->drvtyp->flags & DRVFL_QICTAPE) {
if (data[1] & 0x1) {
/* If this is a QIC tape drive and bit 0 is set, this is a
request to read multiple fixed-length blocks. */
scsi_debug_cmd(bus, "QIC in fixed block mode\n");
for (i = 0; i < sects; i++) {
r = sim_tape_rdrecf(uptr, &bus->buf[new_buf_b], §sread, uptr->drvtyp->sectsize);
scsi_debug_cmd(bus, "Read tape blk %d, read %d, r = %d\n",
sects, sectsread, r);
if (r == MTSE_OK) {
new_buf_b += uptr->drvtyp->sectsize;
} else {
scsi_tape_status(bus, r);
scsi_status(bus, bus->status, bus->sense_key, bus->sense_code);
return;
}
}
} else {
/* QIC drives respond with an illegal request when the
request does not specify fixed-block mode */
scsi_debug_cmd(bus, "QIC not in fixed block mode, invalid command\n");
scsi_status(bus, STS_CHK, KEY_ILLREQ|KEY_M_ILI, ASC_INVCDB);
return;
}
}
else {
/* Otherwise, this is a normal streaming tape read */
if (data[1] & 0x1) {
r = sim_tape_rdrecf (uptr, &bus->buf[0], §sread, (sects * uptr->drvtyp->sectsize));
scsi_debug_cmd (bus, "Read tape blk %d, read %d, r = %d\n", sects, sectsread, r);
}
else {
r = sim_tape_rdrecf (uptr, &bus->buf[0], §sread, sects);
scsi_debug_cmd (bus, "Read tape max %d, read %d, r = %d\n", sects, sectsread, r);
if (r == MTSE_INVRL) { /* overlength condition */
scsi_debug_cmd (bus, "Overlength\n");
if ((data[1] & 0x2) && (uptr->drvtyp->sectsize == 0)) { /* SILI set */
scsi_debug_cmd (bus, "SILI set\n");
}
else {
scsi_debug_cmd (bus, "SILI not set - check condition\n");
scsi_status (bus, STS_CHK, (KEY_OK | KEY_M_ILI), ASC_OK);
return;
}
}
else if ((r == MTSE_OK) && (sectsread < sects)) { /* underlength condition */
scsi_debug_cmd (bus, "Underlength\n");
if (data[1] & 0x2) { /* SILI set */
scsi_debug_cmd (bus, "SILI set\n");
}
else {
scsi_debug_cmd (bus, "SILI not set - check condition\n");
scsi_status_deferred (bus, STS_CHK, (KEY_OK | KEY_M_ILI), ASC_OK);
bus->sense_info = (sects - sectsread);
}
}
}
new_buf_b = sectsread;
}
if (r != MTSE_OK) {
scsi_debug_cmd (bus, "Read error, r = %d\n", r);
}
scsi_tape_status (bus, r);
}
else {
memset (&bus->buf[0], 0, (sects * uptr->drvtyp->sectsize));
sectsread = (sects * uptr->drvtyp->sectsize);
}
if (sectsread > 0) {
bus->buf_b = new_buf_b;
scsi_set_phase (bus, SCSI_DATI); /* data in phase next */
}
else {
bus->buf[bus->buf_b++] = bus->status; /* status code */
scsi_set_phase (bus, SCSI_STS); /* status phase next */
}
scsi_set_req (bus); /* request to send data */
}
/* Command - Read (10 byte command), disk version */
void scsi_read10_disk (SCSI_BUS *bus, uint8 *data, uint32 len)
{
UNIT *uptr = bus->dev[bus->target];
t_lba lba;
t_seccnt sects, sectsread;
t_stat r;
lba = GETL (data, 2);
sects = GETW (data, 7);
scsi_debug_cmd (bus, "Read(10) lba %d blks %d\n", lba, sects);
if (sects == 0) { /* no data to read */
scsi_status (bus, STS_OK, KEY_OK, ASC_OK);
return;
}
if (uptr->flags & UNIT_ATT)
r = sim_disk_rdsect (uptr, lba, &bus->buf[0], §sread, sects);
else {
memset (&bus->buf[0], 0, (sects * uptr->drvtyp->sectsize));
sectsread = sects;
}
bus->buf_b = (sectsread * uptr->drvtyp->sectsize);
scsi_set_phase (bus, SCSI_DATI); /* data in phase next */
scsi_set_req (bus); /* request to send data */
}
/* Command - Read Long */
/* This command is needed by VMS for host-based volume shadowing */
/* See DKDRIVER */
void scsi_read_long (SCSI_BUS *bus, uint8 *data, uint32 len)
{
UNIT *uptr = bus->dev[bus->target];
t_lba lba;
t_seccnt sects, sectsread;
t_stat r;
lba = GETL (data, 2);
sects = GETW (data, 7);
scsi_debug_cmd (bus, "Read Long lba %d bytes %d\n", lba, sects);
if (uptr->flags & UNIT_ATT)
r = sim_disk_rdsect (uptr, lba, &bus->buf[0], §sread, ((sects >> 9) + 1));
else {
memset (&bus->buf[0], 0, sects);
}
bus->buf_b = sects;
scsi_set_phase (bus, SCSI_DATI); /* data in phase next */
scsi_set_req (bus); /* request to send data */
}
/* Command - Write (6 byte command), disk version */
void scsi_write6_disk (SCSI_BUS *bus, uint8 *data, uint32 len)
{
UNIT *uptr = bus->dev[bus->target];
t_lba lba;
t_seccnt sects, sectswritten;
t_stat r;
if (bus->phase == SCSI_CMD) {
scsi_debug_cmd (bus, "Write(6) - CMD\n");
memcpy (&bus->cmd[0], &data[0], 6);
sects = bus->cmd[4];
if (sects == 0) sects = 256;
bus->buf_b = (sects * uptr->drvtyp->sectsize);
scsi_set_phase (bus, SCSI_DATO); /* data out phase next */
scsi_set_req (bus); /* request data */
}
else if (bus->phase == SCSI_DATO) {
sects = bus->cmd[4];
if (sects == 0) sects = 256;
lba = GETW (bus->cmd, 2) | ((bus->cmd[1] & 0x1F) << 16);
scsi_debug_cmd (bus, "Write(6) - DATO, lba %d bytes %d\n", lba, sects);
if (uptr->flags & UNIT_ATT)
r = sim_disk_wrsect (uptr, lba, &bus->buf[0], §swritten, sects);
memset (&bus->cmd[0], 0, 10);
scsi_status (bus, STS_OK, KEY_OK, ASC_OK);
}
}
/* Command - Write (6 byte command), tape version */
void scsi_write6_tape (SCSI_BUS *bus, uint8 *data, uint32 len)
{
UNIT *uptr = bus->dev[bus->target];
t_seccnt sects;
t_stat r;
if (bus->phase == SCSI_CMD) {