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SCSI write support (for usbms mainly).

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* grub-core/disk/scsi.c (grub_scsi_write10): Uncomment. Make buffer
	a const pointer.
	(grub_scsi_write): Implement.
	* include/grub/scsi.h (grub_scsi_dev): Make write buffer a const pointer
This commit is contained in:
Vladimir 'phcoder' Serbinenko 2012-01-30 12:26:11 +01:00
parent 67639fd75e
commit cc774926f1
5 changed files with 47 additions and 12 deletions
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42
grub-core/disk/scsi.c
View file

@ -253,12 +253,11 @@ grub_scsi_read12 (grub_disk_t disk, grub_disk_addr_t sector,
return err;
}
#if 0
/* Send a SCSI request for DISK: write the data stored in BUF to SIZE
sectors starting with SECTOR. */
static grub_err_t
grub_scsi_write10 (grub_disk_t disk, grub_disk_addr_t sector,
grub_size_t size, char *buf)
grub_size_t size, const char *buf)
{
grub_scsi_t scsi;
struct grub_scsi_write10 wr;
@ -287,6 +286,8 @@ grub_scsi_write10 (grub_disk_t disk, grub_disk_addr_t sector,
return err;
}
#if 0
/* Send a SCSI request for DISK: write the data stored in BUF to SIZE
sectors starting with SECTOR. */
static grub_err_t
@ -595,13 +596,38 @@ grub_scsi_write (grub_disk_t disk __attribute((unused)),
grub_size_t size __attribute((unused)),
const char *buf __attribute((unused)))
{
#if 0
/* XXX: Not tested yet! */
grub_scsi_t scsi;
/* XXX: This should depend on the device type? */
return grub_scsi_write10 (disk, sector, size, buf);
#endif
return GRUB_ERR_NOT_IMPLEMENTED_YET;
scsi = disk->data;
if (scsi->devtype == grub_scsi_devtype_cdrom)
return grub_error (GRUB_ERR_IO, "no CD burning");
while (size)
{
/* PATA doesn't support more than 32K reads.
Not sure about AHCI and USB. If it's confirmed that either of
them can do bigger reads reliably this value can be moved to 'scsi'
structure. */
grub_size_t len = 32768 >> disk->log_sector_size;
grub_err_t err;
if (len > size)
len = size;
/* Depending on the type, select a read function. */
switch (scsi->devtype)
{
case grub_scsi_devtype_direct:
err = grub_scsi_write10 (disk, sector, len, buf);
if (err)
return err;
break;
}
size -= len;
sector += len;
buf += len << disk->log_sector_size;
}
return GRUB_ERR_NONE;
}