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sim_disk.c
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/* sim_disk.c: simulator disk support library
Copyright (c) 2011, Mark Pizzolato
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
MARK PIZZOLATO 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 names of Mark Pizzolato shall not be
used in advertising or otherwise to promote the sale, use or other dealings
in this Software without prior written authorization from Mark Pizzolato.
This is the place which hides processing of various disk formats,
as well as OS-specific direct hardware access.
25-Jan-11 MP Initial Implementation
Public routines:
sim_disk_attach attach disk unit
sim_disk_attach_ex attach disk unit extended parameters
sim_disk_attach_ex2 attach disk unit additional extended parameters
sim_disk_detach detach disk unit
sim_disk_attach_help help routine for attaching disks
sim_disk_rdsect read disk sectors
sim_disk_rdsect_a read disk sectors asynchronously
sim_disk_wrsect write disk sectors
sim_disk_wrsect_a write disk sectors asynchronously
sim_disk_unload unload or detach a disk as needed
sim_disk_reset reset unit
sim_disk_wrp TRUE if write protected
sim_disk_isavailable TRUE if available for I/O
sim_disk_size get disk size
sim_disk_set_fmt set disk format
sim_disk_show_fmt show disk format
sim_disk_set_capac set disk capacity
sim_disk_show_capac show disk capacity
sim_disk_set_autosize MTAB set autosize
sim_disk_show_autosize MTAB display autosize
sim_disk_set_autozap MTAB set autozap
sim_disk_show_autozap MTAB display autozap
sim_disk_set_async enable asynchronous operation
sim_disk_clr_async disable asynchronous operation
sim_disk_data_trace debug support
sim_disk_set_drive_type MTAB validator routine
sim_disk_set_drive_type_by_name device reset initialization
sim_disk_show_drive_type MTAB display routine
sim_disk_get_drive_type_set_string set command arguments for the specified unit
sim_disk_test unit test routine
Internal routines:
sim_os_disk_open_raw platform specific open raw device
sim_os_disk_close_raw platform specific close raw device
sim_os_disk_size_raw platform specific raw device size
sim_os_disk_unload_raw platform specific disk unload/eject
sim_os_disk_rdsect platform specific read sectors
sim_os_disk_wrsect platform specific write sectors
sim_vhd_disk_open platform independent open virtual disk file
sim_vhd_disk_create platform independent create virtual disk file
sim_vhd_disk_create_diff platform independent create differencing virtual disk file
sim_vhd_disk_close platform independent close virtual disk file
sim_vhd_disk_size platform independent virtual disk size
sim_vhd_CHS platform independent virtual disk size CHS value
sim_vhd_disk_parent_path platform independent differencing virtual disk parent path
sim_vhd_disk_rdsect platform independent read virtual disk sectors
sim_vhd_disk_wrsect platform independent write virtual disk sectors
sim_disk_find_type locate DRVTYP of named disk type
*/
#define _FILE_OFFSET_BITS 64 /* 64 bit file offset for raw I/O operations */
#include "sim_defs.h"
#include "sim_disk.h"
#include "sim_ether.h"
#include "sim_scsi.h"
#include "sim_scp_private.h"
#define DKUF_F_AUTO 0 /* Auto detect format format */
#define DKUF_F_STD 1 /* SIMH format */
#define DKUF_F_RAW 2 /* Raw Physical Disk Access */
#define DKUF_F_VHD 3 /* VHD format */
#define DKUF_E_AUTO 0 /* Auto detect encoding */
#define DKUF_E_DLD9 1 /* KLH10 packed 36bit little endian word */
#define DKUF_E_DBD9 2 /* KLH10 packed 36bit big endian word */
#define DK_GET_FMT(u) (((u)->flags >> DKUF_V_FMT) & DKUF_M_FMT)
#define DK_GET_ENC(u) (((u)->flags >> DKUF_V_ENC) & DKUF_M_ENC)
#if defined SIM_ASYNCH_IO
#include <pthread.h>
#endif
static t_bool sim_disk_check_attached_container (const char *filename, UNIT **auptr);
/* Newly created SIMH (and possibly RAW) disk containers */
/* will have this data as the last 512 bytes of the container */
/* It will not be considered part of the data in the container */
/* Previously existing containers will have this appended to */
/* the end of the container if they are opened for write */
struct simh_disk_footer {
uint8 Signature[4]; /* must be 'simh' */
uint8 CreatingSimulator[64]; /* name of simulator */
uint8 DriveType[16];
uint32 SectorSize;
uint32 SectorCount;
uint32 ElementEncodingSize;
uint8 CreationTime[28]; /* Result of ctime() */
uint8 FooterVersion; /* Initially 0 */
#define FOOTER_VERSION 1
uint8 AccessFormat; /* 1 - SIMH, 2 - RAW */
uint8 Reserved[342]; /* Currently unused */
uint32 Geometry; /* CHS (Cylinders, Heads and Sectors) */
uint32 DataWidth; /* Data Width in the Transfer Size */
uint32 MediaID; /* Media ID */
uint8 DeviceName[16]; /* Name of the Device when created */
uint32 Highwater[2]; /* Size before footer addition or furthest container point written */
uint32 Unused; /* Currently unused */
uint32 Checksum; /* CRC32 of the prior 508 bytes */
};
/* OS Independent Disk Virtual Disk (VHD) I/O support */
#if (defined (VMS) && !(defined (__ALPHA) || defined (__ia64)))
#define DONT_DO_VHD_SUPPORT /* VAX/VMS compilers don't have 64 bit integers */
#endif
#if defined(_WIN32) || defined (__ALPHA) || defined (__ia64) || defined (VMS)
#ifndef __BYTE_ORDER__
#define __BYTE_ORDER__ __ORDER_LITTLE_ENDIAN__
#endif
#endif
#ifndef __BYTE_ORDER__
#define __BYTE_ORDER__ UNKNOWN
#endif
#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
static uint32
NtoHl(uint32 value)
{
uint8 *l = (uint8 *)&value;
return (uint32)l[3] | ((uint32)l[2]<<8) | ((uint32)l[1]<<16) | ((uint32)l[0]<<24);
}
#elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
static uint32
NtoHl(uint32 value)
{
return value;
}
#else
static uint32
NtoHl(uint32 value)
{
uint8 *l = (uint8 *)&value;
if (sim_end)
return l[3] | (l[2]<<8) | (l[1]<<16) | (l[0]<<24);
return value;
}
#endif
struct disk_context {
t_offset container_size; /* Size of the data portion (of the pseudo disk) */
t_offset highwater; /* Furthest written sector in the disk */
DEVICE *dptr; /* Device for unit (access to debug flags) */
uint32 dbit; /* debugging bit */
uint32 sector_size; /* Disk Sector Size (of the pseudo disk) */
uint32 capac_factor; /* Units of Capacity (8 = quadword, 2 = word, 1 = byte) */
uint32 xfer_encode_size; /* Disk Bus Transfer size (1 - byte, 2 - word, 4 - longword) */
uint32 storage_sector_size;/* Sector size of the containing storage */
uint32 removable; /* Removable device flag */
uint32 media_id; /* MediaID of the container */
uint32 is_cdrom; /* Host system CDROM Device */
uint32 media_removed; /* Media not available flag */
uint32 auto_format; /* Format determined dynamically */
uint32 read_count; /* Number of read operations performed */
uint32 write_count; /* Number of write operations performed */
uint32 data_ileave; /* Data sectors interleaved in container */
uint32 data_ileave_skew; /* Data sectors track skew in container */
DRVTYP *initial_drvtyp; /* Unit Drive Type before any autosize */
t_addr initial_capac; /* Unit Capacity before any autosize */
struct simh_disk_footer
*footer;
#if defined _WIN32
HANDLE disk_handle; /* OS specific Raw device handle */
#endif
#if defined SIM_ASYNCH_IO
int asynch_io; /* Asynchronous Interrupt scheduling enabled */
int asynch_io_latency; /* instructions to delay pending interrupt */
pthread_mutex_t lock;
pthread_t io_thread; /* I/O Thread Id */
pthread_mutex_t io_lock;
pthread_cond_t io_cond;
pthread_cond_t io_done;
pthread_cond_t startup_cond;
int io_dop;
uint8 *buf;
t_seccnt *rsects;
t_seccnt sects;
t_lba lba;
DISK_PCALLBACK callback;
t_stat io_status;
#endif
};
#define disk_ctx up8 /* Field in Unit structure which points to the disk_context */
#if defined SIM_ASYNCH_IO
#define AIO_CALLSETUP \
struct disk_context *ctx = (struct disk_context *)uptr->disk_ctx; \
\
if ((!callback) || !ctx->asynch_io)
#define AIO_CALL(op, _lba, _buf, _rsects, _sects, _callback) \
if (ctx->asynch_io) { \
struct disk_context *ctx = \
(struct disk_context *)uptr->disk_ctx; \
\
pthread_mutex_lock (&ctx->io_lock); \
\
sim_debug_unit (ctx->dbit, uptr, \
"sim_disk AIO_CALL(op=%d, unit=%d, lba=0x%X, sects=%d)\n",\
op, (int)(uptr - ctx->dptr->units), _lba, _sects);\
\
if (ctx->callback) /* horrible mistake, stop */ \
SIM_SCP_ABORT ("AIO_CALL error"); \
ctx->io_dop = op; \
ctx->lba = _lba; \
ctx->buf = _buf; \
ctx->sects = _sects; \
ctx->rsects = _rsects; \
ctx->callback = _callback; \
pthread_cond_signal (&ctx->io_cond); \
pthread_mutex_unlock (&ctx->io_lock); \
} \
else \
if (_callback) \
(_callback) (uptr, r);
#define DOP_DONE 0 /* close */
#define DOP_RSEC 1 /* sim_disk_rdsect_a */
#define DOP_WSEC 2 /* sim_disk_wrsect_a */
#define DOP_IAVL 3 /* sim_disk_isavailable_a */
static void *
_disk_io(void *arg)
{
UNIT* volatile uptr = (UNIT*)arg;
struct disk_context *ctx = (struct disk_context *)uptr->disk_ctx;
/* Boost Priority for this I/O thread vs the CPU instruction execution
thread which in general won't be readily yielding the processor when
this thread needs to run */
sim_os_set_thread_priority (PRIORITY_ABOVE_NORMAL);
sim_debug_unit (ctx->dbit, uptr, "_disk_io(unit=%d) starting\n", (int)(uptr - ctx->dptr->units));
pthread_mutex_lock (&ctx->io_lock);
pthread_cond_signal (&ctx->startup_cond); /* Signal we're ready to go */
while (ctx->asynch_io) {
pthread_cond_wait (&ctx->io_cond, &ctx->io_lock);
if (ctx->io_dop == DOP_DONE)
break;
pthread_mutex_unlock (&ctx->io_lock);
switch (ctx->io_dop) {
case DOP_RSEC:
ctx->io_status = sim_disk_rdsect (uptr, ctx->lba, ctx->buf, ctx->rsects, ctx->sects);
break;
case DOP_WSEC:
ctx->io_status = sim_disk_wrsect (uptr, ctx->lba, ctx->buf, ctx->rsects, ctx->sects);
break;
case DOP_IAVL:
ctx->io_status = sim_disk_isavailable (uptr);
break;
}
pthread_mutex_lock (&ctx->io_lock);
ctx->io_dop = DOP_DONE;
pthread_cond_signal (&ctx->io_done);
sim_activate (uptr, ctx->asynch_io_latency);
}
pthread_mutex_unlock (&ctx->io_lock);
sim_debug_unit (ctx->dbit, uptr, "_disk_io(unit=%d) exiting\n", (int)(uptr - ctx->dptr->units));
return NULL;
}
/* This routine is called in the context of the main simulator thread before
processing events for any unit. It is only called when an asynchronous
thread has called sim_activate() to activate a unit. The job of this
routine is to put the unit in proper condition to digest what may have
occurred in the asynchronous thread.
Since disk processing only handles a single I/O at a time to a
particular disk device (due to using stdio for the SimH Disk format
and stdio doesn't have an atomic seek+(read|write) operation),
we have the opportunity to possibly detect improper attempts to
issue multiple concurrent I/O requests. */
static void _disk_completion_dispatch (UNIT *uptr)
{
struct disk_context *ctx = (struct disk_context *)uptr->disk_ctx;
DISK_PCALLBACK callback = ctx->callback;
sim_debug_unit (ctx->dbit, uptr, "_disk_completion_dispatch(unit=%d, dop=%d, callback=%p)\n", (int)(uptr - ctx->dptr->units), ctx->io_dop, (void *)(ctx->callback));
if (ctx->io_dop != DOP_DONE)
SIM_SCP_ABORT ("_disk_completion_dispatch()"); /* horribly wrong, stop */
if (ctx->callback && ctx->io_dop == DOP_DONE) {
ctx->callback = NULL;
callback (uptr, ctx->io_status);
}
}
static t_bool _disk_is_active (UNIT *uptr)
{
struct disk_context *ctx = (struct disk_context *)uptr->disk_ctx;
if (ctx) {
sim_debug_unit (ctx->dbit, uptr, "_disk_is_active(unit=%d, dop=%d)\n", (int)(uptr - ctx->dptr->units), ctx->io_dop);
return (ctx->io_dop != DOP_DONE);
}
return FALSE;
}
static t_bool _disk_cancel (UNIT *uptr)
{
struct disk_context *ctx = (struct disk_context *)uptr->disk_ctx;
if (ctx) {
sim_debug_unit (ctx->dbit, uptr, "_disk_cancel(unit=%d, dop=%d)\n", (int)(uptr - ctx->dptr->units), ctx->io_dop);
if (ctx->asynch_io) {
pthread_mutex_lock (&ctx->io_lock);
while (ctx->io_dop != DOP_DONE)
pthread_cond_wait (&ctx->io_done, &ctx->io_lock);
pthread_mutex_unlock (&ctx->io_lock);
}
}
return FALSE;
}
#else
#define AIO_CALLSETUP
#define AIO_CALL(op, _lba, _buf, _rsects, _sects, _callback) \
if (_callback) \
(_callback) (uptr, r);
#endif
/* Forward declarations */
static t_stat sim_vhd_disk_implemented (void);
static FILE *sim_vhd_disk_open (const char *rawdevicename, const char *openmode);
static FILE *sim_vhd_disk_create (const char *szVHDPath, t_offset desiredsize, DRVTYP *drvtyp);
static FILE *sim_vhd_disk_create_diff (const char *szVHDPath, const char *szParentVHDPath);
static FILE *sim_vhd_disk_merge (const char *szVHDPath, char **ParentVHD);
static int sim_vhd_disk_close (FILE *f);
static void sim_vhd_disk_flush (FILE *f);
static t_offset sim_vhd_disk_size (FILE *f);
static uint32 sim_vhd_CHS (FILE *f);
static const char *sim_vhd_disk_parent_path (FILE *f);
static t_stat sim_vhd_disk_rdsect (UNIT *uptr, t_lba lba, uint8 *buf, t_seccnt *sectsread, t_seccnt sects);
static t_stat sim_vhd_disk_wrsect (UNIT *uptr, t_lba lba, uint8 *buf, t_seccnt *sectswritten, t_seccnt sects);
static t_stat sim_vhd_disk_clearerr (UNIT *uptr);
static t_stat sim_vhd_disk_set_dtype (FILE *f, const char *dtype, uint32 SectorSize, uint32 xfer_encode_size, uint32 media_id, const char *device_name, uint32 data_width, DRVTYP *drvtyp);
static const char *sim_vhd_disk_get_dtype (FILE *f, uint32 *SectorSize, uint32 *xfer_encode_size, char sim_name[64], time_t *creation_time, uint32 *media_id, char device_name[16], uint32 *data_width);
static DRVTYP *sim_disk_find_type (UNIT *uptr, const char *dtype);
uint32 sim_disk_drvtype_geometry (DRVTYP *drvtyp, uint32 totalSectors);
static uint32 sim_SectorsToCHS (uint32 totalSectors);
static t_stat sim_os_disk_implemented_raw (void);
static FILE *sim_os_disk_open_raw (const char *rawdevicename, const char *openmode);
static int sim_os_disk_close_raw (FILE *f);
static void sim_os_disk_flush_raw (FILE *f);
static t_offset sim_os_disk_size_raw (FILE *f);
static t_stat sim_os_disk_unload_raw (FILE *f);
static t_bool sim_os_disk_isavailable_raw (FILE *f);
static t_stat sim_os_disk_rdsect (UNIT *uptr, t_lba lba, uint8 *buf, t_seccnt *sectsread, t_seccnt sects);
static t_stat sim_os_disk_read (UNIT *uptr, t_offset addr, uint8 *buf, uint32 *bytesread, uint32 bytes);
static t_stat sim_os_disk_wrsect (UNIT *uptr, t_lba lba, uint8 *buf, t_seccnt *sectswritten, t_seccnt sects);
static t_stat sim_os_disk_write (UNIT *uptr, t_offset addr, uint8 *buf, uint32 *byteswritten, uint32 bytes);
static t_stat sim_os_disk_info_raw (FILE *f, uint32 *sector_size, uint32 *removable, uint32 *is_cdrom);
static char *HostPathToVhdPath (const char *szHostPath, char *szVhdPath, size_t VhdPathSize);
static char *VhdPathToHostPath (const char *szVhdPath, char *szHostPath, size_t HostPathSize);
static t_offset get_filesystem_size (UNIT *uptr, t_bool *isreadonly);
struct sim_disk_fmt {
const char *name; /* name */
int32 uflags; /* unit flags */
int32 fmtval; /* Format type value */
uint32 encode; /* Data Encode Default - 0 means take from attach parameter */
t_stat (*impl_fnc)(void); /* Implemented Test Function */
};
static struct sim_disk_fmt fmts[] = {
{ "AUTO detect", 0, DKUF_F_AUTO, 0, NULL},
{ "SIMH", 0, DKUF_F_STD, 0, NULL},
{ "RAW", 0, DKUF_F_RAW, 0, sim_os_disk_implemented_raw},
{ "VHD", 0, DKUF_F_VHD, 0, sim_vhd_disk_implemented},
{ NULL, 0, 0, 0, NULL}
};
/* Set disk format */
t_stat sim_disk_set_fmt (UNIT *uptr, int32 val, CONST char *cptr, void *desc)
{
uint32 f;
if (uptr == NULL)
return SCPE_IERR;
if ((cptr == NULL) || (*cptr == '\0'))
return SCPE_ARG;
for (f = 0; fmts[f].name; f++) {
if (fmts[f].name && (MATCH_CMD (cptr, fmts[f].name) == 0)) {
if ((fmts[f].impl_fnc) && (fmts[f].impl_fnc() != SCPE_OK))
return SCPE_NOFNC;
uptr->flags = (uptr->flags & ~DKUF_FMT) |
(fmts[f].fmtval << DKUF_V_FMT) | fmts[f].uflags;
if (fmts[f].fmtval == DKUF_F_AUTO)
uptr->flags = (uptr->flags & ~DKUF_ENC) | (DKUF_E_AUTO << DKUF_V_ENC);
return SCPE_OK;
}
}
if (MATCH_CMD (cptr, "DLD9") == 0) {
if (DK_GET_FMT (uptr) == DKUF_F_AUTO)
uptr->flags = (uptr->flags & ~DKUF_FMT) |
(DKUF_F_STD << DKUF_V_FMT) | fmts[f].uflags;
uptr->flags = (uptr->flags & ~DKUF_ENC) | (DKUF_E_DLD9 << DKUF_V_ENC);
return SCPE_OK;
}
if (MATCH_CMD (cptr, "DBD9") == 0) {
if (DK_GET_FMT (uptr) == DKUF_F_AUTO)
uptr->flags = (uptr->flags & ~DKUF_FMT) |
(DKUF_F_STD << DKUF_V_FMT) | fmts[f].uflags;
uptr->flags = (uptr->flags & ~DKUF_ENC) | (DKUF_E_DBD9 << DKUF_V_ENC);
return SCPE_OK;
}
return sim_messagef (SCPE_ARG, "Unknown disk format: %s\n", cptr);
}
/* Show disk format */
static const char *sim_disk_fmt (UNIT *uptr)
{
int32 f = DK_GET_FMT (uptr);
static char fmt_buf[32];
static const char *encodings[] = {"", "DLD9", "DBD9", ""};
size_t i;
for (i = 0; fmts[i].name; i++)
if (fmts[i].fmtval == f) {
snprintf (fmt_buf, sizeof (fmt_buf), "%s%s%s", fmts[i].name, (DK_GET_ENC (uptr) > DKUF_E_AUTO) ? "-" : "", encodings[DK_GET_ENC (uptr)]);
return fmt_buf;
}
return "invalid";
}
t_stat sim_disk_show_fmt (FILE *st, UNIT *uptr, int32 val, CONST void *desc)
{
fprintf (st, "%s format", sim_disk_fmt (uptr));
return SCPE_OK;
}
const char *_disk_tranfer_encoding (uint32 val)
{
static char encoding[128];
switch (val) {
case 0:
snprintf (encoding, sizeof (encoding), "Unexpected packing/encoding missing (i.e. 0)");
break;
case 1:
case 2:
case 4:
case 8:
snprintf (encoding, sizeof (encoding), "%u bytes in and out", val);
break;
case DK_ENC_LL_DLD9:
snprintf (encoding, sizeof (encoding), "DLD9: 36bits on disk (little endian order) to 64bits in memory");
break;
case DK_ENC_LL_DBD9:
snprintf (encoding, sizeof (encoding), "DBD9: 36bits on disk (big endian order) to 64bits in memory");
break;
default:
snprintf (encoding, sizeof (encoding), "Unexpected encoding: %u bits on disk packed %s endian order to %u bits in memory %s endian order",
(val >> DK_ENC_XFR_IN) & 0x7F, ((val >> DK_ENC_XFR_IN) & DK_ENC_X_LSB) ? "little" : "big",
(val >> DK_ENC_XFR_OUT) & 0x7F, ((val >> DK_ENC_XFR_OUT) & DK_ENC_X_LSB) ? "little" : "big");
break;
}
return encoding;
}
/* Set disk capacity */
t_stat sim_disk_set_capac (UNIT *uptr, int32 val, CONST char *cptr, void *desc)
{
t_offset cap;
t_stat r;
DEVICE *dptr = find_dev_from_unit (uptr);
if ((cptr == NULL) || (*cptr == 0))
return SCPE_ARG;
if (uptr->flags & UNIT_ATT)
return SCPE_ALATT;
cap = (t_offset) get_uint (cptr, 10, sim_taddr_64? 2000000: 2000, &r);
if (r != SCPE_OK)
return SCPE_ARG;
uptr->capac = (t_addr)((cap * ((t_offset) 1000000))/((dptr->flags & DEV_SECTORS) ? 512 : 1));
return SCPE_OK;
}
/* Show disk capacity */
t_stat sim_disk_show_capac (FILE *st, UNIT *uptr, int32 val, CONST void *desc)
{
const char *cap_units = "B";
DEVICE *dptr = find_dev_from_unit (uptr);
t_offset capac = ((t_offset)uptr->capac)*((dptr->flags & DEV_SECTORS) ? 512 : 1);
if ((dptr->dwidth / dptr->aincr) == 16)
cap_units = "W";
if (capac) {
if (capac >= (t_offset) 1000000)
fprintf (st, "capacity=%dM%s", (uint32) (capac / ((t_offset) 1000000)), cap_units);
else if (uptr->capac >= (t_addr) 1000)
fprintf (st, "capacity=%dK%s", (uint32) (capac / ((t_offset) 1000)), cap_units);
else fprintf (st, "capacity=%d%s", (uint32) capac, cap_units);
}
else fprintf (st, "undefined capacity");
return SCPE_OK;
}
/* Test for available */
t_bool sim_disk_isavailable (UNIT *uptr)
{
struct disk_context *ctx;
t_bool is_available;
if (!(uptr->flags & UNIT_ATT)) /* attached? */
return FALSE;
ctx = (struct disk_context *)uptr->disk_ctx;
switch (DK_GET_FMT (uptr)) { /* case on format */
case DKUF_F_STD: /* SIMH format */
is_available = TRUE;
break;
case DKUF_F_VHD: /* VHD format */
is_available = TRUE;
break;
case DKUF_F_RAW: /* Raw Physical Disk Access */
if (sim_os_disk_isavailable_raw (uptr->fileref)) {
if (ctx->media_removed) {
int32 saved_switches = sim_switches;
int32 saved_quiet = sim_quiet;
char *path = (char *)malloc (1 + strlen (uptr->filename));
sim_switches = 0;
sim_quiet = 1;
strcpy (path, uptr->filename);
sim_disk_attach (uptr, path, ctx->sector_size, ctx->xfer_encode_size,
FALSE, ctx->dbit, NULL, 0, 0);
sim_quiet = saved_quiet;
sim_switches = saved_switches;
free (path);
ctx->media_removed = 0;
}
}
else
ctx->media_removed = 1;
is_available = !ctx->media_removed;
break;
default:
is_available = FALSE;
break;
}
sim_debug_unit (ctx->dbit, uptr, "sim_disk_isavailable(unit=%d)=%s\n", (int)(uptr - ctx->dptr->units), is_available ? "true" : "false");
return is_available;
}
t_bool sim_disk_isavailable_a (UNIT *uptr, DISK_PCALLBACK callback)
{
t_bool r = FALSE;
AIO_CALLSETUP
r = sim_disk_isavailable (uptr);
AIO_CALL(DOP_IAVL, 0, NULL, NULL, 0, callback);
return r;
}
t_stat sim_disk_set_all_noautosize (int32 flag, CONST char *cptr)
{
DEVICE *dptr;
uint32 dev, unit, count = 0;
int32 saved_sim_show_message = sim_show_message;
sim_show_message = FALSE;
for (dev = 0; (dptr = sim_devices[dev]) != NULL; dev++) {
t_bool device_disabled = ((dptr->flags & DEV_DIS) != 0);
if ((DEV_TYPE (dptr) != DEV_DISK) &&
(DEV_TYPE (dptr) != DEV_SCSI)) /* If not a sim_disk device? */
continue; /* skip this device */
if (device_disabled)
dptr->flags &= ~DEV_DIS; /* Temporarily enable device */
++count;
for (unit = 0; unit < dptr->numunits; unit++) {
char cmd[CBUFSIZE];
t_bool unit_disabled = ((dptr->units[unit].flags & UNIT_DIS) != 0);
if (unit_disabled && /* disabled and */
((dptr->units[unit].flags & UNIT_DISABLE) == 0)) /* can't be enabled? */
continue; /* Not a drive unit, so skip. */
if (unit_disabled)
dptr->units[unit].flags &= ~UNIT_DIS; /* Temporarily enable unit */
sprintf (cmd, "%s %sAUTOSIZE", sim_uname (&dptr->units[unit]), (flag != 0) ? "NO" : "");
set_cmd (0, cmd);
if (unit_disabled)
dptr->units[unit].flags |= ~UNIT_DIS; /* leave unit disabled again */
}
if (device_disabled)
dptr->flags |= DEV_DIS; /* leave device the way we found it */
}
sim_show_message = saved_sim_show_message;
if (count == 0)
return sim_messagef (SCPE_ARG, "No disk devices support autosizing\n");
return SCPE_OK;
}
/* Set disk autosize */
t_stat sim_disk_set_autosize (UNIT *uptr, int32 val, CONST char *cptr, void *desc)
{
if (uptr == NULL)
return SCPE_IERR;
if ((uptr->drvtyp != NULL) &&
(DRVFL_GET_IFTYPE(uptr->drvtyp) == DRVFL_TYPE_SCSI) &&
(uptr->drvtyp->devtype == SCSI_TAPE))
return sim_messagef (SCPE_NOFNC, "%s: Autosizing Tapes is not supported\n", sim_uname (uptr));
if (cptr != NULL)
return sim_messagef (SCPE_ARG, "%s: Unexpected autosize argument: %s\n", sim_uname (uptr), cptr);
if (((uptr->flags & UNIT_ATT) != 0) && ((uptr->drvtyp == NULL) || ((uptr->drvtyp->flags & DRVFL_DETAUTO) == 0)))
return sim_messagef (SCPE_ALATT, "%s: Disk already attached, autosizing not changed\n", sim_uname (uptr));
if (val ^ ((uptr->flags & DKUF_NOAUTOSIZE) != 0))
return SCPE_OK;
if (val)
uptr->flags &= ~DKUF_NOAUTOSIZE;
else
uptr->flags |= DKUF_NOAUTOSIZE;
return SCPE_OK;
}
/* Show disk autosize */
t_stat sim_disk_show_autosize (FILE *st, UNIT *uptr, int32 val, CONST void *desc)
{
if ((uptr->drvtyp != NULL) &&
(DRVFL_GET_IFTYPE(uptr->drvtyp) == DRVFL_TYPE_SCSI) &&
(uptr->drvtyp->devtype == SCSI_TAPE))
return SCPE_NOFNC;
fprintf (st, "%sautosize", ((uptr->flags & DKUF_NOAUTOSIZE) != 0) ? "no" : "");
return SCPE_OK;
}
t_stat sim_disk_set_all_autozap (int32 flag, CONST char *cptr)
{
DEVICE *dptr;
uint32 dev, unit, count = 0;
int32 saved_sim_show_message = sim_show_message;
sim_show_message = FALSE;
for (dev = 0; (dptr = sim_devices[dev]) != NULL; dev++) {
t_bool device_disabled = ((dptr->flags & DEV_DIS) != 0);
if ((DEV_TYPE (dptr) != DEV_DISK) &&
(DEV_TYPE (dptr) != DEV_SCSI)) /* If not a sim_disk device? */
continue; /* skip this device */
if (device_disabled)
dptr->flags &= ~DEV_DIS; /* Temporarily enable device */
++count;
for (unit = 0; unit < dptr->numunits; unit++) {
char cmd[CBUFSIZE];
t_bool unit_disabled = ((dptr->units[unit].flags & UNIT_DIS) != 0);
if (unit_disabled && /* disabled and */
((dptr->units[unit].flags & UNIT_DISABLE) == 0)) /* can't be enabled? */
continue; /* Not a drive unit, so skip. */
if (unit_disabled)
dptr->units[unit].flags &= ~UNIT_DIS; /* Temporarily enable unit */
sprintf (cmd, "%s %sAUTOZAP", sim_uname (&dptr->units[unit]), (flag != 0) ? "" : "NO");
set_cmd (0, cmd);
if (unit_disabled)
dptr->units[unit].flags |= ~UNIT_DIS; /* leave unit disabled again */
}
if (device_disabled)
dptr->flags |= DEV_DIS; /* leave device the way we found it */
}
sim_show_message = saved_sim_show_message;
if (count == 0)
return sim_messagef (SCPE_ARG, "No disk devices in the %s simulator support autozap\n", sim_name);
return SCPE_OK;
}
/* Set disk autozap */
t_stat sim_disk_set_autozap (UNIT *uptr, int32 val, CONST char *cptr, void *desc)
{
if (uptr == NULL)
return SCPE_IERR;
if ((uptr->drvtyp != NULL) &&
(DRVFL_GET_IFTYPE(uptr->drvtyp) == DRVFL_TYPE_SCSI) &&
(uptr->drvtyp->devtype == SCSI_TAPE))
return sim_messagef (SCPE_NOFNC, "%s: Autozapping Tapes is not supported\n", sim_uname (uptr));
if (cptr != NULL)
return sim_messagef (SCPE_ARG, "%s: Unexpected autozap argument: %s\n", sim_uname (uptr), cptr);
if (val ^ ((uptr->flags & DKUF_AUTOZAP) == 0))
return SCPE_OK;
if (val)
uptr->flags |= DKUF_AUTOZAP;
else
uptr->flags &= ~DKUF_AUTOZAP;
return SCPE_OK;
}
/* Show disk autozap */
t_stat sim_disk_show_autozap (FILE *st, UNIT *uptr, int32 val, CONST void *desc)
{
if ((uptr->drvtyp != NULL) &&
(DRVFL_GET_IFTYPE(uptr->drvtyp) == DRVFL_TYPE_SCSI) &&
(uptr->drvtyp->devtype == SCSI_TAPE))
return SCPE_NOFNC;
fprintf (st, "%sautozap", ((uptr->flags & DKUF_AUTOZAP) != 0) ? "" : "no" );
return SCPE_OK;
}
/* Test for write protect */
t_bool sim_disk_wrp (UNIT *uptr)
{
return (uptr->flags & DKUF_WRP)? TRUE: FALSE;
}
/* Get Disk size */
t_offset sim_disk_size (UNIT *uptr)
{
struct disk_context *ctx = (struct disk_context *)uptr->disk_ctx;
t_offset physical_size, filesystem_size;
t_bool saved_quiet = sim_quiet;
if ((uptr->flags & UNIT_ATT) == 0)
return (t_offset)-1;
physical_size = ctx->container_size;
sim_quiet = TRUE;
filesystem_size = get_filesystem_size (uptr, NULL);
sim_quiet = saved_quiet;
if ((filesystem_size == (t_offset)-1) ||
(filesystem_size < physical_size))
return physical_size;
return filesystem_size;
}
/* Enable asynchronous operation */
t_stat sim_disk_set_async (UNIT *uptr, int latency)
{
#if !defined(SIM_ASYNCH_IO)
char *msg = "Disk: cannot operate asynchronously\r\n";
sim_printf ("%s", msg);
return SCPE_NOFNC;
#else
struct disk_context *ctx = (struct disk_context *)uptr->disk_ctx;
pthread_attr_t attr;
sim_debug_unit (ctx->dbit, uptr, "sim_disk_set_async(unit=%d)\n", (int)(uptr - ctx->dptr->units));
ctx->asynch_io = sim_asynch_enabled;
ctx->asynch_io_latency = latency;
if (ctx->asynch_io) {
pthread_mutex_init (&ctx->io_lock, NULL);
pthread_cond_init (&ctx->io_cond, NULL);
pthread_cond_init (&ctx->io_done, NULL);
pthread_cond_init (&ctx->startup_cond, NULL);
pthread_attr_init(&attr);
pthread_attr_setscope(&attr, PTHREAD_SCOPE_SYSTEM);
pthread_mutex_lock (&ctx->io_lock);
pthread_create (&ctx->io_thread, &attr, _disk_io, (void *)uptr);
pthread_attr_destroy(&attr);
pthread_cond_wait (&ctx->startup_cond, &ctx->io_lock); /* Wait for thread to stabilize */
pthread_mutex_unlock (&ctx->io_lock);
pthread_cond_destroy (&ctx->startup_cond);
}
uptr->a_check_completion = _disk_completion_dispatch;
uptr->a_is_active = _disk_is_active;
uptr->cancel = _disk_cancel;
return SCPE_OK;
#endif
}
/* Disable asynchronous operation */
t_stat sim_disk_clr_async (UNIT *uptr)
{
#if !defined(SIM_ASYNCH_IO)
return SCPE_NOFNC;
#else
struct disk_context *ctx = (struct disk_context *)uptr->disk_ctx;
/* make sure device exists */
if (!ctx) return SCPE_UNATT;
sim_debug_unit (ctx->dbit, uptr, "sim_disk_clr_async(unit=%d)\n", (int)(uptr - ctx->dptr->units));
if (ctx->asynch_io) {
pthread_mutex_lock (&ctx->io_lock);
ctx->asynch_io = 0;
pthread_cond_signal (&ctx->io_cond);
pthread_mutex_unlock (&ctx->io_lock);
pthread_join (ctx->io_thread, NULL);
pthread_mutex_destroy (&ctx->io_lock);
pthread_cond_destroy (&ctx->io_cond);
pthread_cond_destroy (&ctx->io_done);
}
return SCPE_OK;
#endif
}
/* Read Sectors */
static t_stat _sim_disk_rdsect (UNIT *uptr, t_lba lba, uint8 *buf, t_seccnt *sectsread, t_seccnt sects)
{
t_offset da;
uint32 err, tbc;
size_t i;
struct disk_context *ctx = (struct disk_context *)uptr->disk_ctx;
sim_debug_unit (ctx->dbit, uptr, "_sim_disk_rdsect(unit=%d, lba=0x%X, sects=%d)\n", (int)(uptr - ctx->dptr->units), lba, sects);
da = ((t_offset)lba) * ctx->sector_size;
tbc = sects * ctx->sector_size;
if (sectsread)
*sectsread = 0;
while (tbc) {
size_t sectbytes;
clearerr (uptr->fileref);
err = sim_fseeko (uptr->fileref, da, SEEK_SET); /* set pos */
if (err)
return SCPE_IOERR;
i = sim_fread (buf, 1, tbc, uptr->fileref);
if (i < tbc) /* fill */
memset (&buf[i], 0, tbc-i);
if ((i == 0) && /* Reading at or past EOF? */
feof (uptr->fileref))
i = tbc; /* return 0's which have already been filled in buffer */
sectbytes = (i / ctx->sector_size) * ctx->sector_size;
if (i > sectbytes)
sectbytes += ctx->sector_size;
if (sectsread)
*sectsread += sectbytes / ctx->sector_size;
err = ferror (uptr->fileref);
if (err)
return SCPE_IOERR;
tbc -= sectbytes;
if ((tbc == 0) || (i == 0))
return SCPE_OK;
da += sectbytes;
buf += sectbytes;
}
return SCPE_OK;
}
t_stat sim_disk_rdsect (UNIT *uptr, t_lba lba, uint8 *buf, t_seccnt *sectsread, t_seccnt sects)
{
t_stat r;
struct disk_context *ctx = (struct disk_context *)uptr->disk_ctx;
uint32 f = DK_GET_FMT (uptr);
t_seccnt sread = 0;
uint8 *tbuf = NULL;
uint8 *rbuf;
sim_debug_unit (ctx->dbit, uptr, "sim_disk_rdsect(unit=%d, lba=0x%X, sects=%d)\n", (int)(uptr - ctx->dptr->units), lba, sects);
ctx->read_count++; /* record read operation */
if ((sects == 1) && /* Single sector reads */
(lba >= (uptr->capac*ctx->capac_factor)/(ctx->sector_size/((ctx->dptr->flags & DEV_SECTORS) ? ctx->sector_size : 1)))) {/* beyond the end of the disk */
memset (buf, '\0', ctx->sector_size); /* are bad block management efforts - zero buffer */
if (sectsread)
*sectsread = 1;
return SCPE_OK; /* return success */
}
if ((0 == (ctx->sector_size & (ctx->storage_sector_size - 1))) || /* Sector Aligned & whole sector transfers */
((0 == ((lba*ctx->sector_size) & (ctx->storage_sector_size - 1))) &&
(0 == ((sects*ctx->sector_size) & (ctx->storage_sector_size - 1)))) ||
(f == DKUF_F_STD) || (f == DKUF_F_VHD)) { /* or SIMH or VHD formats */
if (ctx->xfer_encode_size > DK_ENC_LONGLONG) {
tbuf = (uint8*) malloc (ctx->sector_size * sects);
if (tbuf == NULL)
return SCPE_MEM;
rbuf = tbuf;
}
else
rbuf = buf;
switch (f) { /* case on format */
case DKUF_F_STD: /* SIMH format */
r = _sim_disk_rdsect (uptr, lba, rbuf, &sread, sects);
break;
case DKUF_F_VHD: /* VHD format */
r = sim_vhd_disk_rdsect (uptr, lba, rbuf, &sread, sects);
break;
case DKUF_F_RAW: /* Raw Physical Disk Access */
r = sim_os_disk_rdsect (uptr, lba, rbuf, &sread, sects);
break;
default:
free (tbuf);
return SCPE_NOFNC;
}
if (sectsread)
*sectsread = sread;
if (ctx->xfer_encode_size > DK_ENC_LONGLONG) {
uint32 sbits = (ctx->xfer_encode_size >> DK_ENC_XFR_IN) & 0x7F;
t_bool sLSB = (((ctx->xfer_encode_size >> DK_ENC_XFR_IN) & DK_ENC_X_LSB) != 0);
uint32 dbits = (ctx->xfer_encode_size >> DK_ENC_XFR_OUT) & 0x7F;
t_bool dLSB = (((ctx->xfer_encode_size >> DK_ENC_XFR_OUT) & DK_ENC_X_LSB) != 0);
uint32 scount = ((sread * ctx->sector_size) * 8) / sbits;
sim_buf_pack_unpack (rbuf, /* source buffer pointer */
buf, /* destination buffer pointer */
sbits, /* source buffer element size in bits */
sLSB, /* source numbered using LSB ordering */
scount, /* count of source elements */
dbits, /* interesting bits of each destination element */
dLSB); /* destination numbered using LSB ordering */
}
else
sim_buf_swap_data (buf, ctx->xfer_encode_size, (sread * ctx->sector_size) / ctx->xfer_encode_size);
free (tbuf);
return r;
}
else { /* Unaligned and/or partial sector transfers in RAW mode */
size_t tbufsize = sects * ctx->sector_size + 2 * ctx->storage_sector_size;
uint8 *tbuf = (uint8*) malloc (tbufsize);
t_offset ssaddr = (lba * (t_offset)ctx->sector_size) & ~(t_offset)(ctx->storage_sector_size -1);
uint32 soffset = (uint32)((lba * (t_offset)ctx->sector_size) - ssaddr);
uint32 bytesread;
if (sectsread)
*sectsread = 0;
if (tbuf == NULL)
return SCPE_MEM;
r = sim_os_disk_read (uptr, ssaddr, tbuf, &bytesread, tbufsize & ~(ctx->storage_sector_size - 1));
sread = (bytesread - soffset) / ctx->sector_size;
if (sread > sects)
sread = sects;
if (sectsread)
*sectsread = sread;
if (ctx->xfer_encode_size > DK_ENC_LONGLONG) {
uint32 sbits = (ctx->xfer_encode_size >> DK_ENC_XFR_IN) & 0x7F;
t_bool sLSB = (((ctx->xfer_encode_size >> DK_ENC_XFR_IN) & DK_ENC_X_LSB) != 0);
uint32 dbits = (ctx->xfer_encode_size >> DK_ENC_XFR_OUT) & 0x7F;
t_bool dLSB = (((ctx->xfer_encode_size >> DK_ENC_XFR_OUT) & DK_ENC_X_LSB) != 0);
uint32 scount = ((sread * ctx->sector_size) * 8) / sbits;
sim_buf_pack_unpack (tbuf + soffset, /* source buffer pointer */
buf, /* destination buffer pointer */
sbits, /* source buffer element size in bits */
sLSB, /* source numbered using LSB ordering */
scount, /* count of source elements */
dbits, /* interesting bits of each destination element */
dLSB); /* destination numbered using LSB ordering */
}
else
sim_buf_copy_swapped (buf, tbuf + soffset, ctx->xfer_encode_size, (sread * ctx->sector_size) / ctx->xfer_encode_size);
free (tbuf);
return r;
}