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nexedi
linux
Commits
e564e72b
Commit
e564e72b
authored
Nov 04, 2002
by
Alan Cox
Committed by
Dave Jones
Nov 04, 2002
Browse files
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[PATCH] fd_mcs finish up I hope
parent
6fc80776
Changes
2
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Showing
2 changed files
with
92 additions
and
95 deletions
+92
-95
drivers/scsi/fd_mcs.c
drivers/scsi/fd_mcs.c
+91
-94
drivers/scsi/fd_mcs.h
drivers/scsi/fd_mcs.h
+1
-1
No files found.
drivers/scsi/fd_mcs.c
View file @
e564e72b
...
...
@@ -1325,118 +1325,115 @@ static int fd_mcs_host_reset(Scsi_Cmnd * SCpnt)
return
FAILED
;
}
static
int
fd_mcs_device_reset
(
Scsi_Cmnd
*
SCpnt
)
{
return
FAILED
;
}
static
int
fd_mcs_device_reset
(
Scsi_Cmnd
*
SCpnt
)
{
return
FAILED
;
}
static
int
fd_mcs_bus_reset
(
Scsi_Cmnd
*
SCpnt
)
{
struct
Scsi_Host
*
shpnt
=
SCpnt
->
host
;
unsigned
long
flags
;
static
int
fd_mcs_bus_reset
(
Scsi_Cmnd
*
SCpnt
)
{
struct
Scsi_Host
*
shpnt
=
SCpnt
->
host
;
#if DEBUG_RESET
static
int
called_once
=
0
;
static
int
called_once
=
0
;
#endif
#if ERRORS_ONLY
if
(
SCpnt
)
printk
(
"fd_mcs: SCSI Bus Reset
\n
"
);
if
(
SCpnt
)
printk
(
"fd_mcs: SCSI Bus Reset
\n
"
);
#endif
#if DEBUG_RESET
if
(
called_once
)
fd_mcs_print_info
(
current_SC
);
called_once
=
1
;
if
(
called_once
)
fd_mcs_print_info
(
current_SC
);
called_once
=
1
;
#endif
spin_lock_irqsave
(
shpnt
->
host_lock
,
flags
);
outb
(
1
,
SCSI_Cntl_port
);
do_pause
(
2
);
outb
(
0
,
SCSI_Cntl_port
);
do_pause
(
115
);
outb
(
0
,
SCSI_Mode_Cntl_port
);
outb
(
PARITY_MASK
,
TMC_Cntl_port
);
/* Unless this is the very first call (i.e., SCPnt == NULL), everything
is probably hosed at this point. We will, however, try to keep
things going by informing the high-level code that we need help. */
outb
(
1
,
SCSI_Cntl_port
);
do_pause
(
2
);
outb
(
0
,
SCSI_Cntl_port
);
do_pause
(
115
);
outb
(
0
,
SCSI_Mode_Cntl_port
);
outb
(
PARITY_MASK
,
TMC_Cntl_port
);
spin_unlock_irqrestore
(
shpnt
->
host_lock
,
flags
);
/* Unless this is the very first call (i.e., SCPnt == NULL), everything
is probably hosed at this point. We will, however, try to keep
things going by informing the high-level code that we need help. */
return
SUCCESS
;
}
}
#include <scsi/scsi_ioctl.h>
static
int
fd_mcs_biosparam
(
Scsi_Disk
*
disk
,
struct
block_device
*
bdev
,
sector_t
capacity
,
int
*
info_array
)
{
unsigned
char
buf
[
512
+
sizeof
(
int
)
*
2
];
int
size
=
capacity
;
int
*
sizes
=
(
int
*
)
buf
;
unsigned
char
*
data
=
(
unsigned
char
*
)
(
sizes
+
2
);
unsigned
char
do_read
[]
=
{
READ_6
,
0
,
0
,
0
,
1
,
0
};
int
retcode
;
/* BIOS >= 3.4 for MCA cards */
/* This algorithm was provided by Future Domain (much thanks!). */
sizes
[
0
]
=
0
;
/* zero bytes out */
sizes
[
1
]
=
512
;
/* one sector in */
memcpy
(
data
,
do_read
,
sizeof
(
do_read
));
retcode
=
kernel_scsi_ioctl
(
disk
->
device
,
SCSI_IOCTL_SEND_COMMAND
,
(
void
*
)
buf
);
if
(
!
retcode
/* SCSI command ok */
&&
data
[
511
]
==
0xaa
&&
data
[
510
]
==
0x55
/* Partition table valid */
&&
data
[
0x1c2
])
{
/* Partition type */
/* The partition table layout is as follows:
Start: 0x1b3h
Offset: 0 = partition status
1 = starting head
2 = starting sector and cylinder (word, encoded)
4 = partition type
5 = ending head
6 = ending sector and cylinder (word, encoded)
8 = starting absolute sector (double word)
c = number of sectors (double word)
Signature: 0x1fe = 0x55aa
So, this algorithm assumes:
1) the first partition table is in use,
2) the data in the first entry is correct, and
3) partitions never divide cylinders
Note that (1) may be FALSE for NetBSD (and other BSD flavors),
as well as for Linux. Note also, that Linux doesn't pay any
attention to the fields that are used by this algorithm -- it
only uses the absolute sector data. Recent versions of Linux's
fdisk(1) will fill this data in correctly, and forthcoming
versions will check for consistency.
Checking for a non-zero partition type is not part of the
Future Domain algorithm, but it seemed to be a reasonable thing
to do, especially in the Linux and BSD worlds. */
info_array
[
0
]
=
data
[
0x1c3
]
+
1
;
/* heads */
info_array
[
1
]
=
data
[
0x1c4
]
&
0x3f
;
/* sectors */
static
int
fd_mcs_biosparam
(
struct
scsi_device
*
disk
,
struct
block_device
*
bdev
,
sector_t
capacity
,
int
*
info_array
)
{
unsigned
char
buf
[
512
+
sizeof
(
int
)
*
2
];
int
size
=
capacity
;
int
*
sizes
=
(
int
*
)
buf
;
unsigned
char
*
data
=
(
unsigned
char
*
)
(
sizes
+
2
);
unsigned
char
do_read
[]
=
{
READ_6
,
0
,
0
,
0
,
1
,
0
};
int
retcode
;
/* BIOS >= 3.4 for MCA cards */
/* This algorithm was provided by Future Domain (much thanks!). */
sizes
[
0
]
=
0
;
/* zero bytes out */
sizes
[
1
]
=
512
;
/* one sector in */
memcpy
(
data
,
do_read
,
sizeof
(
do_read
));
retcode
=
kernel_scsi_ioctl
(
disk
,
SCSI_IOCTL_SEND_COMMAND
,
(
void
*
)
buf
);
if
(
!
retcode
/* SCSI command ok */
&&
data
[
511
]
==
0xaa
&&
data
[
510
]
==
0x55
/* Partition table valid */
&&
data
[
0x1c2
])
{
/* Partition type */
/* The partition table layout is as follows:
Start: 0x1b3h
Offset: 0 = partition status
1 = starting head
2 = starting sector and cylinder (word, encoded)
4 = partition type
5 = ending head
6 = ending sector and cylinder (word, encoded)
8 = starting absolute sector (double word)
c = number of sectors (double word)
Signature: 0x1fe = 0x55aa
So, this algorithm assumes:
1) the first partition table is in use,
2) the data in the first entry is correct, and
3) partitions never divide cylinders
Note that (1) may be FALSE for NetBSD (and other BSD flavors),
as well as for Linux. Note also, that Linux doesn't pay any
attention to the fields that are used by this algorithm -- it
only uses the absolute sector data. Recent versions of Linux's
fdisk(1) will fill this data in correctly, and forthcoming
versions will check for consistency.
Checking for a non-zero partition type is not part of the
Future Domain algorithm, but it seemed to be a reasonable thing
to do, especially in the Linux and BSD worlds. */
info_array
[
0
]
=
data
[
0x1c3
]
+
1
;
/* heads */
info_array
[
1
]
=
data
[
0x1c4
]
&
0x3f
;
/* sectors */
}
else
{
/* Note that this new method guarantees that there will always be
less than 1024 cylinders on a platter. This is good for drives
up to approximately 7.85GB (where 1GB = 1024 * 1024 kB). */
if
((
unsigned
int
)
size
>=
0x7e0000U
)
{
info_array
[
0
]
=
0xff
;
/* heads = 255 */
info_array
[
1
]
=
0x3f
;
/* sectors = 63 */
}
else
if
((
unsigned
int
)
size
>=
0x200000U
)
{
info_array
[
0
]
=
0x80
;
/* heads = 128 */
info_array
[
1
]
=
0x3f
;
/* sectors = 63 */
}
else
{
/* Note that this new method guarantees that there will always be
less than 1024 cylinders on a platter. This is good for drives
up to approximately 7.85GB (where 1GB = 1024 * 1024 kB). */
if
((
unsigned
int
)
size
>=
0x7e0000U
)
{
info_array
[
0
]
=
0xff
;
/* heads = 255 */
info_array
[
1
]
=
0x3f
;
/* sectors = 63 */
}
else
if
((
unsigned
int
)
size
>=
0x200000U
)
{
info_array
[
0
]
=
0x80
;
/* heads = 128 */
info_array
[
1
]
=
0x3f
;
/* sectors = 63 */
}
else
{
info_array
[
0
]
=
0x40
;
/* heads = 64 */
info_array
[
1
]
=
0x20
;
/* sectors = 32 */
}
info_array
[
0
]
=
0x40
;
/* heads = 64 */
info_array
[
1
]
=
0x20
;
/* sectors = 32 */
}
/* For both methods, compute the cylinders */
info_array
[
2
]
=
(
unsigned
int
)
size
/
(
info_array
[
0
]
*
info_array
[
1
]);
}
/* For both methods, compute the cylinders */
info_array
[
2
]
=
(
unsigned
int
)
size
/
(
info_array
[
0
]
*
info_array
[
1
]);
return
0
;
}
/* Eventually this will go into an include file, but this will be later */
static
Scsi_Host_Template
driver_template
=
FD_MCS
;
...
...
drivers/scsi/fd_mcs.h
View file @
e564e72b
...
...
@@ -30,7 +30,7 @@ static int fd_mcs_bus_reset(Scsi_Cmnd *);
static
int
fd_mcs_device_reset
(
Scsi_Cmnd
*
);
static
int
fd_mcs_host_reset
(
Scsi_Cmnd
*
);
static
int
fd_mcs_queue
(
Scsi_Cmnd
*
,
void
(
*
done
)
(
Scsi_Cmnd
*
));
static
int
fd_mcs_biosparam
(
Disk
*
,
struct
block_device
*
,
static
int
fd_mcs_biosparam
(
struct
scsi_device
*
,
struct
block_device
*
,
sector_t
,
int
*
);
static
int
fd_mcs_proc_info
(
char
*
,
char
**
,
off_t
,
int
,
int
,
int
);
static
const
char
*
fd_mcs_info
(
struct
Scsi_Host
*
);
...
...
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