merge mainline into ahci
This commit is contained in:
Vladimir 'phcoder' Serbinenko
commit
de2690be7c
984 changed files with 85724 additions and 20016 deletions
593
grub-core/disk/ata.c
Normal file
593
grub-core/disk/ata.c
Normal file
|
|
@ -0,0 +1,593 @@
|
|||
/* ata.c - ATA disk access. */
|
||||
/*
|
||||
* GRUB -- GRand Unified Bootloader
|
||||
* Copyright (C) 2007, 2008, 2009 Free Software Foundation, Inc.
|
||||
*
|
||||
* GRUB is free software: you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License as published by
|
||||
* the Free Software Foundation, either version 3 of the License, or
|
||||
* (at your option) any later version.
|
||||
*
|
||||
* GRUB is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
|
||||
*/
|
||||
|
||||
#include <grub/ata.h>
|
||||
#include <grub/dl.h>
|
||||
#include <grub/disk.h>
|
||||
#include <grub/mm.h>
|
||||
#include <grub/scsi.h>
|
||||
|
||||
static grub_ata_dev_t grub_ata_dev_list;
|
||||
|
||||
/* Byteorder has to be changed before strings can be read. */
|
||||
static void
|
||||
grub_ata_strncpy (char *dst, char *src, grub_size_t len)
|
||||
{
|
||||
grub_uint16_t *src16 = (grub_uint16_t *) src;
|
||||
grub_uint16_t *dst16 = (grub_uint16_t *) dst;
|
||||
unsigned int i;
|
||||
|
||||
for (i = 0; i < len / 2; i++)
|
||||
*(dst16++) = grub_be_to_cpu16 (*(src16++));
|
||||
dst[len] = '\0';
|
||||
}
|
||||
|
||||
static void
|
||||
grub_ata_dumpinfo (struct grub_ata *dev, char *info)
|
||||
{
|
||||
char text[41];
|
||||
|
||||
/* The device information was read, dump it for debugging. */
|
||||
grub_ata_strncpy (text, info + 20, 20);
|
||||
grub_dprintf ("ata", "Serial: %s\n", text);
|
||||
grub_ata_strncpy (text, info + 46, 8);
|
||||
grub_dprintf ("ata", "Firmware: %s\n", text);
|
||||
grub_ata_strncpy (text, info + 54, 40);
|
||||
grub_dprintf ("ata", "Model: %s\n", text);
|
||||
|
||||
if (! dev->atapi)
|
||||
{
|
||||
grub_dprintf ("ata", "Addressing: %d\n", dev->addr);
|
||||
grub_dprintf ("ata", "Sectors: %lld\n", (unsigned long long) dev->size);
|
||||
}
|
||||
}
|
||||
|
||||
static grub_err_t
|
||||
grub_atapi_identify (struct grub_ata *dev)
|
||||
{
|
||||
struct grub_disk_ata_pass_through_parms parms;
|
||||
char *info;
|
||||
grub_err_t err;
|
||||
|
||||
info = grub_malloc (GRUB_DISK_SECTOR_SIZE);
|
||||
if (! info)
|
||||
return grub_errno;
|
||||
|
||||
grub_memset (&parms, 0, sizeof (parms));
|
||||
parms.taskfile.disk = 0;
|
||||
parms.taskfile.cmd = GRUB_ATA_CMD_IDENTIFY_PACKET_DEVICE;
|
||||
|
||||
err = dev->dev->readwrite (dev, &parms);
|
||||
if (err)
|
||||
return err;
|
||||
|
||||
if (parms.size != GRUB_DISK_SECTOR_SIZE)
|
||||
return grub_error (GRUB_ERR_UNKNOWN_DEVICE,
|
||||
"device cannot be identified");
|
||||
|
||||
dev->atapi = 1;
|
||||
|
||||
grub_ata_dumpinfo (dev, info);
|
||||
|
||||
grub_free (info);
|
||||
|
||||
return GRUB_ERR_NONE;
|
||||
}
|
||||
|
||||
static grub_err_t
|
||||
grub_ata_identify (struct grub_ata *dev)
|
||||
{
|
||||
struct grub_disk_ata_pass_through_parms parms;
|
||||
char *info;
|
||||
grub_uint16_t *info16;
|
||||
grub_err_t err;
|
||||
|
||||
info = grub_malloc (GRUB_DISK_SECTOR_SIZE);
|
||||
if (! info)
|
||||
return grub_errno;
|
||||
|
||||
info16 = (grub_uint16_t *) info;
|
||||
grub_memset (&parms, 0, sizeof (parms));
|
||||
parms.buffer = info;
|
||||
parms.taskfile.disk = 0;
|
||||
|
||||
parms.taskfile.cmd = GRUB_ATA_CMD_IDENTIFY_DEVICE;
|
||||
|
||||
err = dev->dev->readwrite (dev, &parms);
|
||||
if (err)
|
||||
return err;
|
||||
|
||||
if (parms.size != GRUB_DISK_SECTOR_SIZE)
|
||||
{
|
||||
grub_uint8_t sts = parms.taskfile.status;
|
||||
grub_free (info);
|
||||
if ((sts & (GRUB_ATA_STATUS_BUSY | GRUB_ATA_STATUS_DRQ
|
||||
| GRUB_ATA_STATUS_ERR)) == GRUB_ATA_STATUS_ERR
|
||||
&& (parms.taskfile.error & 0x04 /* ABRT */))
|
||||
/* Device without ATA IDENTIFY, try ATAPI. */
|
||||
return grub_atapi_identify (dev);
|
||||
|
||||
else if (sts == 0x00)
|
||||
/* No device, return error but don't print message. */
|
||||
return GRUB_ERR_UNKNOWN_DEVICE;
|
||||
|
||||
else
|
||||
/* Other Error. */
|
||||
return grub_error (GRUB_ERR_UNKNOWN_DEVICE,
|
||||
"device cannot be identified");
|
||||
}
|
||||
|
||||
/* Now it is certain that this is not an ATAPI device. */
|
||||
dev->atapi = 0;
|
||||
|
||||
/* CHS is always supported. */
|
||||
dev->addr = GRUB_ATA_CHS;
|
||||
|
||||
/* Check if LBA is supported. */
|
||||
if (info16[49] & (1 << 9))
|
||||
{
|
||||
/* Check if LBA48 is supported. */
|
||||
if (info16[83] & (1 << 10))
|
||||
dev->addr = GRUB_ATA_LBA48;
|
||||
else
|
||||
dev->addr = GRUB_ATA_LBA;
|
||||
}
|
||||
|
||||
/* Determine the amount of sectors. */
|
||||
if (dev->addr != GRUB_ATA_LBA48)
|
||||
dev->size = grub_le_to_cpu32(*((grub_uint32_t *) &info16[60]));
|
||||
else
|
||||
dev->size = grub_le_to_cpu64(*((grub_uint64_t *) &info16[100]));
|
||||
|
||||
/* Read CHS information. */
|
||||
dev->cylinders = info16[1];
|
||||
dev->heads = info16[3];
|
||||
dev->sectors_per_track = info16[6];
|
||||
|
||||
grub_ata_dumpinfo (dev, info);
|
||||
|
||||
grub_free(info);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static grub_err_t
|
||||
grub_ata_setaddress (struct grub_ata *dev,
|
||||
struct grub_disk_ata_pass_through_parms *parms,
|
||||
grub_disk_addr_t sector,
|
||||
grub_size_t size)
|
||||
{
|
||||
switch (dev->addr)
|
||||
{
|
||||
case GRUB_ATA_CHS:
|
||||
{
|
||||
unsigned int cylinder;
|
||||
unsigned int head;
|
||||
unsigned int sect;
|
||||
|
||||
/* Calculate the sector, cylinder and head to use. */
|
||||
sect = ((grub_uint32_t) sector % dev->sectors_per_track) + 1;
|
||||
cylinder = (((grub_uint32_t) sector / dev->sectors_per_track)
|
||||
/ dev->heads);
|
||||
head = ((grub_uint32_t) sector / dev->sectors_per_track) % dev->heads;
|
||||
|
||||
if (sect > dev->sectors_per_track
|
||||
|| cylinder > dev->cylinders
|
||||
|| head > dev->heads)
|
||||
return grub_error (GRUB_ERR_OUT_OF_RANGE,
|
||||
"sector %d cannot be addressed "
|
||||
"using CHS addressing", sector);
|
||||
|
||||
parms->taskfile.disk = head;
|
||||
parms->taskfile.sectnum = sect;
|
||||
parms->taskfile.cyllsb = cylinder & 0xFF;
|
||||
parms->taskfile.cylmsb = cylinder >> 8;
|
||||
|
||||
break;
|
||||
}
|
||||
|
||||
case GRUB_ATA_LBA:
|
||||
if (size == 256)
|
||||
size = 0;
|
||||
parms->taskfile.disk = ((sector >> 24) & 0x0F);
|
||||
|
||||
parms->taskfile.sectors = size;
|
||||
parms->taskfile.lba_low = sector & 0xFF;
|
||||
parms->taskfile.lba_mid = (sector >> 8) & 0xFF;
|
||||
parms->taskfile.lba_high = (sector >> 16) & 0xFF;
|
||||
break;
|
||||
|
||||
case GRUB_ATA_LBA48:
|
||||
if (size == 65536)
|
||||
size = 0;
|
||||
|
||||
parms->taskfile.disk = 0;
|
||||
|
||||
/* Set "Previous". */
|
||||
parms->taskfile.sectors = size & 0xFF;
|
||||
parms->taskfile.lba_low = sector & 0xFF;
|
||||
parms->taskfile.lba_mid = (sector >> 8) & 0xFF;
|
||||
parms->taskfile.lba_high = (sector >> 16) & 0xFF;
|
||||
|
||||
/* Set "Current". */
|
||||
parms->taskfile.sectors48 = (size >> 8) & 0xFF;
|
||||
parms->taskfile.lba48_low = (sector >> 24) & 0xFF;
|
||||
parms->taskfile.lba48_mid = (sector >> 32) & 0xFF;
|
||||
parms->taskfile.lba48_high = (sector >> 40) & 0xFF;
|
||||
|
||||
break;
|
||||
}
|
||||
|
||||
return GRUB_ERR_NONE;
|
||||
}
|
||||
|
||||
static grub_err_t
|
||||
grub_ata_readwrite (grub_disk_t disk, grub_disk_addr_t sector,
|
||||
grub_size_t size, char *buf, int rw)
|
||||
{
|
||||
struct grub_ata *ata = disk->data;
|
||||
|
||||
grub_ata_addressing_t addressing = ata->addr;
|
||||
grub_size_t batch;
|
||||
int cmd, cmd_write;
|
||||
|
||||
grub_dprintf("ata", "grub_ata_readwrite (size=%llu, rw=%d)\n",
|
||||
(unsigned long long) size, rw);
|
||||
|
||||
if (addressing == GRUB_ATA_LBA48 && ((sector + size) >> 28) != 0)
|
||||
{
|
||||
batch = 65536;
|
||||
cmd = GRUB_ATA_CMD_READ_SECTORS_EXT;
|
||||
cmd_write = GRUB_ATA_CMD_WRITE_SECTORS_EXT;
|
||||
}
|
||||
else
|
||||
{
|
||||
if (addressing == GRUB_ATA_LBA48)
|
||||
addressing = GRUB_ATA_LBA;
|
||||
if (addressing != GRUB_ATA_CHS)
|
||||
batch = 256;
|
||||
else
|
||||
batch = 1;
|
||||
cmd = GRUB_ATA_CMD_READ_SECTORS;
|
||||
cmd_write = GRUB_ATA_CMD_WRITE_SECTORS;
|
||||
}
|
||||
|
||||
grub_size_t nsectors = 0;
|
||||
while (nsectors < size)
|
||||
{
|
||||
struct grub_disk_ata_pass_through_parms parms;
|
||||
grub_err_t err;
|
||||
|
||||
if (size - nsectors < batch)
|
||||
batch = size - nsectors;
|
||||
|
||||
grub_dprintf("ata", "rw=%d, sector=%llu, batch=%llu\n", rw, (unsigned long long) sector, (unsigned long long) batch);
|
||||
grub_memset (&parms, 0, sizeof (parms));
|
||||
grub_ata_setaddress (ata, &parms, sector, batch);
|
||||
parms.taskfile.cmd = (! rw ? cmd : cmd_write);
|
||||
parms.buffer = buf;
|
||||
parms.size = batch * GRUB_DISK_SECTOR_SIZE;
|
||||
|
||||
err = ata->dev->readwrite (ata, &parms);
|
||||
if (err)
|
||||
return err;
|
||||
if (parms.size != batch * GRUB_DISK_SECTOR_SIZE)
|
||||
return grub_error (GRUB_ERR_READ_ERROR, "incomplete read");
|
||||
buf += GRUB_DISK_SECTOR_SIZE * batch;
|
||||
sector += batch;
|
||||
nsectors += batch;
|
||||
}
|
||||
|
||||
return GRUB_ERR_NONE;
|
||||
}
|
||||
|
||||
|
||||
|
||||
static inline void
|
||||
grub_ata_real_close (struct grub_ata *ata)
|
||||
{
|
||||
if (ata->dev->close)
|
||||
ata->dev->close (ata);
|
||||
}
|
||||
|
||||
static struct grub_ata *
|
||||
grub_ata_real_open (int id, int bus)
|
||||
{
|
||||
struct grub_ata *ata;
|
||||
grub_ata_dev_t p;
|
||||
|
||||
ata = grub_malloc (sizeof (*ata));
|
||||
if (!ata)
|
||||
return NULL;
|
||||
for (p = grub_ata_dev_list; p; p = p->next)
|
||||
{
|
||||
grub_err_t err;
|
||||
if (p->open (id, bus, ata))
|
||||
{
|
||||
grub_errno = GRUB_ERR_NONE;
|
||||
continue;
|
||||
}
|
||||
ata->dev = p;
|
||||
/* Use the IDENTIFY DEVICE command to query the device. */
|
||||
err = grub_ata_identify (ata);
|
||||
if (err)
|
||||
{
|
||||
grub_free (ata);
|
||||
return NULL;
|
||||
}
|
||||
return ata;
|
||||
}
|
||||
grub_free (ata);
|
||||
grub_error (GRUB_ERR_UNKNOWN_DEVICE, "no such ATA device");
|
||||
return NULL;
|
||||
}
|
||||
|
||||
static int
|
||||
grub_ata_iterate (int (*hook_in) (const char *name))
|
||||
{
|
||||
auto int hook (int id, int bus);
|
||||
int hook (int id, int bus)
|
||||
{
|
||||
struct grub_ata *ata;
|
||||
int ret;
|
||||
char devname[40];
|
||||
|
||||
ata = grub_ata_real_open (id, bus);
|
||||
|
||||
if (!ata)
|
||||
{
|
||||
grub_errno = GRUB_ERR_NONE;
|
||||
return 0;
|
||||
}
|
||||
if (ata->atapi)
|
||||
{
|
||||
grub_ata_real_close (ata);
|
||||
return 0;
|
||||
}
|
||||
grub_snprintf (devname, sizeof (devname),
|
||||
"%s%d", grub_scsi_names[id], bus);
|
||||
ret = hook_in (devname);
|
||||
grub_ata_real_close (ata);
|
||||
return ret;
|
||||
}
|
||||
|
||||
grub_ata_dev_t p;
|
||||
|
||||
for (p = grub_ata_dev_list; p; p = p->next)
|
||||
if (p->iterate && p->iterate (hook))
|
||||
return 1;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static grub_err_t
|
||||
grub_ata_open (const char *name, grub_disk_t disk)
|
||||
{
|
||||
unsigned id, bus;
|
||||
struct grub_ata *ata;
|
||||
|
||||
for (id = 0; id < GRUB_SCSI_NUM_SUBSYSTEMS; id++)
|
||||
if (grub_strncmp (grub_scsi_names[id], name,
|
||||
grub_strlen (grub_scsi_names[id])) == 0
|
||||
&& grub_isdigit (name[grub_strlen (grub_scsi_names[id])]))
|
||||
break;
|
||||
if (id == GRUB_SCSI_NUM_SUBSYSTEMS)
|
||||
return grub_error (GRUB_ERR_UNKNOWN_DEVICE, "not an ATA harddisk");
|
||||
bus = grub_strtoul (name + grub_strlen (grub_scsi_names[id]), 0, 0);
|
||||
ata = grub_ata_real_open (id, bus);
|
||||
if (!ata)
|
||||
return grub_errno;
|
||||
|
||||
if (ata->atapi)
|
||||
return grub_error (GRUB_ERR_UNKNOWN_DEVICE, "not an ATA harddisk");
|
||||
|
||||
disk->total_sectors = ata->size;
|
||||
|
||||
disk->id = grub_make_scsi_id (id, bus, 0);
|
||||
|
||||
disk->data = ata;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void
|
||||
grub_ata_close (grub_disk_t disk)
|
||||
{
|
||||
struct grub_ata *ata = disk->data;
|
||||
grub_ata_real_close (ata);
|
||||
}
|
||||
|
||||
static grub_err_t
|
||||
grub_ata_read (grub_disk_t disk, grub_disk_addr_t sector,
|
||||
grub_size_t size, char *buf)
|
||||
{
|
||||
return grub_ata_readwrite (disk, sector, size, buf, 0);
|
||||
}
|
||||
|
||||
static grub_err_t
|
||||
grub_ata_write (grub_disk_t disk,
|
||||
grub_disk_addr_t sector,
|
||||
grub_size_t size,
|
||||
const char *buf)
|
||||
{
|
||||
return grub_ata_readwrite (disk, sector, size, (char *) buf, 1);
|
||||
}
|
||||
|
||||
static struct grub_disk_dev grub_atadisk_dev =
|
||||
{
|
||||
.name = "ATA",
|
||||
.id = GRUB_DISK_DEVICE_ATA_ID,
|
||||
.iterate = grub_ata_iterate,
|
||||
.open = grub_ata_open,
|
||||
.close = grub_ata_close,
|
||||
.read = grub_ata_read,
|
||||
.write = grub_ata_write,
|
||||
.next = 0
|
||||
};
|
||||
|
||||
|
||||
|
||||
/* ATAPI code. */
|
||||
|
||||
static grub_err_t
|
||||
grub_atapi_read (struct grub_scsi *scsi, grub_size_t cmdsize, char *cmd,
|
||||
grub_size_t size, char *buf)
|
||||
{
|
||||
struct grub_ata *dev = scsi->data;
|
||||
struct grub_disk_ata_pass_through_parms parms;
|
||||
grub_err_t err;
|
||||
|
||||
grub_dprintf("ata", "grub_atapi_read (size=%llu)\n", (unsigned long long) size);
|
||||
grub_memset (&parms, 0, sizeof (parms));
|
||||
|
||||
parms.taskfile.disk = 0;
|
||||
parms.taskfile.features = 0;
|
||||
parms.taskfile.atapi_ireason = 0;
|
||||
parms.taskfile.atapi_cnthigh = size >> 8;
|
||||
parms.taskfile.atapi_cntlow = size & 0xff;
|
||||
parms.taskfile.cmd = GRUB_ATA_CMD_PACKET;
|
||||
parms.cmd = cmd;
|
||||
parms.cmdsize = cmdsize;
|
||||
|
||||
parms.size = size;
|
||||
parms.buffer = buf;
|
||||
|
||||
err = dev->dev->readwrite (dev, &parms);
|
||||
if (err)
|
||||
return err;
|
||||
|
||||
if (parms.size != size)
|
||||
return grub_error (GRUB_ERR_READ_ERROR, "incomplete ATAPI read");
|
||||
return GRUB_ERR_NONE;
|
||||
}
|
||||
|
||||
static grub_err_t
|
||||
grub_atapi_write (struct grub_scsi *scsi __attribute__((unused)),
|
||||
grub_size_t cmdsize __attribute__((unused)),
|
||||
char *cmd __attribute__((unused)),
|
||||
grub_size_t size __attribute__((unused)),
|
||||
char *buf __attribute__((unused)))
|
||||
{
|
||||
// XXX: scsi.mod does not use write yet.
|
||||
return grub_error (GRUB_ERR_NOT_IMPLEMENTED_YET, "ATAPI write not implemented");
|
||||
}
|
||||
|
||||
static grub_err_t
|
||||
grub_atapi_open (int id, int bus, struct grub_scsi *scsi)
|
||||
{
|
||||
struct grub_ata *ata;
|
||||
|
||||
ata = grub_ata_real_open (id, bus);
|
||||
if (!ata)
|
||||
return grub_errno;
|
||||
|
||||
if (! ata->atapi)
|
||||
return grub_error (GRUB_ERR_UNKNOWN_DEVICE, "no such ATAPI device");
|
||||
|
||||
scsi->data = ata;
|
||||
|
||||
return GRUB_ERR_NONE;
|
||||
}
|
||||
|
||||
static int
|
||||
grub_atapi_iterate (int (*hook_in) (int id, int bus, int luns))
|
||||
{
|
||||
auto int hook (int id, int bus);
|
||||
int hook (int id, int bus)
|
||||
{
|
||||
struct grub_ata *ata;
|
||||
int ret;
|
||||
|
||||
ata = grub_ata_real_open (id, bus);
|
||||
|
||||
if (!ata)
|
||||
{
|
||||
grub_errno = GRUB_ERR_NONE;
|
||||
return 0;
|
||||
}
|
||||
if (!ata->atapi)
|
||||
{
|
||||
grub_ata_real_close (ata);
|
||||
return 0;
|
||||
}
|
||||
ret = hook_in (id, bus, 1);
|
||||
grub_ata_real_close (ata);
|
||||
return ret;
|
||||
}
|
||||
|
||||
grub_ata_dev_t p;
|
||||
|
||||
for (p = grub_ata_dev_list; p; p = p->next)
|
||||
if (p->iterate && p->iterate (hook))
|
||||
return 1;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void
|
||||
grub_atapi_close (grub_scsi_t disk)
|
||||
{
|
||||
struct grub_ata *ata = disk->data;
|
||||
grub_ata_real_close (ata);
|
||||
}
|
||||
|
||||
|
||||
void
|
||||
grub_ata_dev_register (grub_ata_dev_t dev)
|
||||
{
|
||||
dev->next = grub_ata_dev_list;
|
||||
grub_ata_dev_list = dev;
|
||||
}
|
||||
|
||||
void
|
||||
grub_ata_dev_unregister (grub_ata_dev_t dev)
|
||||
{
|
||||
grub_ata_dev_t *p, q;
|
||||
|
||||
for (p = &grub_ata_dev_list, q = *p; q; p = &(q->next), q = q->next)
|
||||
if (q == dev)
|
||||
{
|
||||
*p = q->next;
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
static struct grub_scsi_dev grub_atapi_dev =
|
||||
{
|
||||
.iterate = grub_atapi_iterate,
|
||||
.open = grub_atapi_open,
|
||||
.close = grub_atapi_close,
|
||||
.read = grub_atapi_read,
|
||||
.write = grub_atapi_write,
|
||||
.next = 0
|
||||
};
|
||||
|
||||
|
||||
|
||||
GRUB_MOD_INIT(ata)
|
||||
{
|
||||
grub_disk_dev_register (&grub_atadisk_dev);
|
||||
|
||||
/* ATAPI devices are handled by scsi.mod. */
|
||||
grub_scsi_dev_register (&grub_atapi_dev);
|
||||
}
|
||||
|
||||
GRUB_MOD_FINI(ata)
|
||||
{
|
||||
grub_scsi_dev_unregister (&grub_atapi_dev);
|
||||
grub_disk_dev_unregister (&grub_atadisk_dev);
|
||||
}
|
||||
Loading…
Add table
Add a link
Reference in a new issue