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DMA ATA commands support

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This commit is contained in:
Vladimir 'phcoder' Serbinenko 2010-12-25 02:53:20 +01:00
parent 908a8fc37a
commit 51f7e1acb7
4 changed files with 33 additions and 5 deletions
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1
grub-core/disk/ahci.c
View file

@ -398,6 +398,7 @@ grub_ahci_open (int id, int devnum, struct grub_ata *ata)
grub_dprintf ("ahci", "opening AHCI dev `ahci%d'\n", dev->num);
ata->data = dev;
ata->dma = 0;
return GRUB_ERR_NONE;
}

18
grub-core/disk/ata.c
View file

@ -255,9 +255,17 @@ grub_ata_readwrite (grub_disk_t disk, grub_disk_addr_t sector,
if (addressing == GRUB_ATA_LBA48 && ((sector + size) >> 28) != 0)
{
batch = 65536;
if (ata->dma)
{
cmd = GRUB_ATA_CMD_READ_SECTORS_DMA_EXT;
cmd_write = GRUB_ATA_CMD_WRITE_SECTORS_DMA_EXT;
}
else
{
cmd = GRUB_ATA_CMD_READ_SECTORS_EXT;
cmd_write = GRUB_ATA_CMD_WRITE_SECTORS_EXT;
}
}
else
{
if (addressing == GRUB_ATA_LBA48)
@ -266,9 +274,17 @@ grub_ata_readwrite (grub_disk_t disk, grub_disk_addr_t sector,
batch = 256;
else
batch = 1;
if (ata->dma)
{
cmd = GRUB_ATA_CMD_READ_SECTORS_DMA;
cmd_write = GRUB_ATA_CMD_WRITE_SECTORS_DMA;
}
else
{
cmd = GRUB_ATA_CMD_READ_SECTORS;
cmd_write = GRUB_ATA_CMD_WRITE_SECTORS;
}
}
grub_size_t nsectors = 0;
while (nsectors < size)
@ -285,6 +301,8 @@ grub_ata_readwrite (grub_disk_t disk, grub_disk_addr_t sector,
parms.taskfile.cmd = (! rw ? cmd : cmd_write);
parms.buffer = buf;
parms.size = batch * GRUB_DISK_SECTOR_SIZE;
if (ata->dma)
parms.dma = 1;
err = ata->dev->readwrite (ata, &parms);
if (err)

1
grub-core/disk/pata.c
View file

@ -474,6 +474,7 @@ grub_pata_open (int id, int devnum, struct grub_ata *ata)
return err;
ata->data = devfnd;
ata->dma = 0;
return GRUB_ERR_NONE;
}

8
include/grub/ata.h
View file

@ -82,6 +82,9 @@ enum grub_ata_commands
GRUB_ATA_CMD_PACKET = 0xa0,
GRUB_ATA_CMD_READ_SECTORS = 0x20,
GRUB_ATA_CMD_READ_SECTORS_EXT = 0x24,
GRUB_ATA_CMD_READ_SECTORS_DMA = 0xc8,
GRUB_ATA_CMD_READ_SECTORS_DMA_EXT = 0x25,
GRUB_ATA_CMD_SECURITY_FREEZE_LOCK = 0xf5,
GRUB_ATA_CMD_SET_FEATURES = 0xef,
GRUB_ATA_CMD_SLEEP = 0xe6,
@ -89,6 +92,8 @@ enum grub_ata_commands
GRUB_ATA_CMD_STANDBY_IMMEDIATE = 0xe0,
GRUB_ATA_CMD_WRITE_SECTORS = 0x30,
GRUB_ATA_CMD_WRITE_SECTORS_EXT = 0x34,
GRUB_ATA_CMD_WRITE_SECTORS_DMA_EXT = 0x35,
GRUB_ATA_CMD_WRITE_SECTORS_DMA = 0xca,
};
enum grub_ata_timeout_milliseconds
@ -151,6 +156,7 @@ struct grub_disk_ata_pass_through_parms
int write;
void *cmd;
int cmdsize;
int dma;
};
struct grub_ata
@ -171,6 +177,8 @@ struct grub_ata
/* Set to 0 for ATA, set to 1 for ATAPI. */
int atapi;
int dma;
void *data;
struct grub_ata_dev *dev;