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SCSI >2TiB support.

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* grub-core/disk/scsi.c (grub_scsi_read16): New function.
	(grub_scsi_write16): Likewise.
	(grub_scsi_read): Use read16 when necessary.
	(grub_scsi_write): Likewise.
	* include/grub/scsicmd.h (grub_scsi_read16): New struct.
	(grub_scsi_write16): Likewise.
	(grub_scsi_cmd_t): Add READ16 and WRITE16.
This commit is contained in:
Vladimir 'phcoder' Serbinenko 2012-01-30 12:47:26 +01:00
parent cc774926f1
commit bc8d0f45a5
3 changed files with 111 additions and 3 deletions
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12
ChangeLog
View file

@ -1,3 +1,15 @@
2012-01-30 Vladimir Serbinenko <phcoder@gmail.com>
SCSI >2TiB support.
* grub-core/disk/scsi.c (grub_scsi_read16): New function.
(grub_scsi_write16): Likewise.
(grub_scsi_read): Use read16 when necessary.
(grub_scsi_write): Likewise.
* include/grub/scsicmd.h (grub_scsi_read16): New struct.
(grub_scsi_write16): Likewise.
(grub_scsi_cmd_t): Add READ16 and WRITE16.
2012-01-30 Vladimir Serbinenko <phcoder@gmail.com>
SCSI write support (for usbms mainly).

74
grub-core/disk/scsi.c
View file

@ -253,6 +253,38 @@ grub_scsi_read12 (grub_disk_t disk, grub_disk_addr_t sector,
return err;
}
/* Send a SCSI request for DISK: read SIZE sectors starting with
sector SECTOR to BUF. */
static grub_err_t
grub_scsi_read16 (grub_disk_t disk, grub_disk_addr_t sector,
grub_size_t size, char *buf)
{
grub_scsi_t scsi;
struct grub_scsi_read16 rd;
grub_err_t err;
grub_err_t err_sense;
scsi = disk->data;
rd.opcode = grub_scsi_cmd_read16;
rd.lun = scsi->lun << GRUB_SCSI_LUN_SHIFT;
rd.lba = grub_cpu_to_be64 (sector);
rd.size = grub_cpu_to_be32 (size);
rd.reserved = 0;
rd.control = 0;
err = scsi->dev->read (scsi, sizeof (rd), (char *) &rd, size * scsi->blocksize, buf);
/* Each SCSI command should be followed by Request Sense.
If not so, many devices STALLs or definitely freezes. */
err_sense = grub_scsi_request_sense (scsi);
if (err_sense != GRUB_ERR_NONE)
grub_errno = err;
/* err_sense is ignored for now and Request Sense Data also... */
return err;
}
/* Send a SCSI request for DISK: write the data stored in BUF to SIZE
sectors starting with SECTOR. */
static grub_err_t
@ -321,6 +353,39 @@ grub_scsi_write12 (grub_disk_t disk, grub_disk_addr_t sector,
}
#endif
/* Send a SCSI request for DISK: write the data stored in BUF to SIZE
sectors starting with SECTOR. */
static grub_err_t
grub_scsi_write16 (grub_disk_t disk, grub_disk_addr_t sector,
grub_size_t size, const char *buf)
{
grub_scsi_t scsi;
struct grub_scsi_write16 wr;
grub_err_t err;
grub_err_t err_sense;
scsi = disk->data;
wr.opcode = grub_scsi_cmd_write16;
wr.lun = scsi->lun << GRUB_SCSI_LUN_SHIFT;
wr.lba = grub_cpu_to_be64 (sector);
wr.size = grub_cpu_to_be32 (size);
wr.reserved = 0;
wr.control = 0;
err = scsi->dev->write (scsi, sizeof (wr), (char *) &wr, size * scsi->blocksize, buf);
/* Each SCSI command should be followed by Request Sense.
If not so, many devices STALLs or definitely freezes. */
err_sense = grub_scsi_request_sense (scsi);
if (err_sense != GRUB_ERR_NONE)
grub_errno = err;
/* err_sense is ignored for now and Request Sense Data also... */
return err;
}
static int
grub_scsi_iterate (int (*hook) (const char *name),
@ -540,12 +605,18 @@ grub_scsi_read (grub_disk_t disk, grub_disk_addr_t sector,
switch (scsi->devtype)
{
case grub_scsi_devtype_direct:
if (sector >> 32)
err = grub_scsi_read16 (disk, sector, len, buf);
else
err = grub_scsi_read10 (disk, sector, len, buf);
if (err)
return err;
break;
case grub_scsi_devtype_cdrom:
if (sector >> 32)
err = grub_scsi_read16 (disk, sector, len, buf);
else
err = grub_scsi_read12 (disk, sector, len, buf);
if (err)
return err;
@ -617,6 +688,9 @@ grub_scsi_write (grub_disk_t disk __attribute((unused)),
switch (scsi->devtype)
{
case grub_scsi_devtype_direct:
if (sector >> 32)
err = grub_scsi_write16 (disk, sector, len, buf);
else
err = grub_scsi_write10 (disk, sector, len, buf);
if (err)
return err;

22
include/grub/scsicmd.h
View file

@ -124,6 +124,16 @@ struct grub_scsi_read12
grub_uint8_t control;
} __attribute__((packed));
struct grub_scsi_read16
{
grub_uint8_t opcode;
grub_uint8_t lun;
grub_uint64_t lba;
grub_uint32_t size;
grub_uint8_t reserved;
grub_uint8_t control;
} __attribute__((packed));
struct grub_scsi_write10
{
grub_uint8_t opcode;
@ -145,6 +155,16 @@ struct grub_scsi_write12
grub_uint8_t control;
} __attribute__((packed));
struct grub_scsi_write16
{
grub_uint8_t opcode;
grub_uint8_t lun;
grub_uint64_t lba;
grub_uint32_t size;
grub_uint8_t reserved;
grub_uint8_t control;
} __attribute__((packed));
typedef enum
{
grub_scsi_cmd_test_unit_ready = 0x00,
@ -153,6 +173,8 @@ typedef enum
grub_scsi_cmd_read_capacity = 0x25,
grub_scsi_cmd_read10 = 0x28,
grub_scsi_cmd_write10 = 0x2a,
grub_scsi_cmd_read16 = 0x88,
grub_scsi_cmd_write16 = 0x8a,
grub_scsi_cmd_read12 = 0xa8,
grub_scsi_cmd_write12 = 0xaa,
} grub_scsi_cmd_t;