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DMA ATA commands support

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Vladimir 'phcoder' Serbinenko committed 2010-12-25 02:53:20 +01:00
1 parent 908a8fc37a
commit 51f7e1acb7
4 files changed
+33 -5
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grub-core/disk/ahci.c
+1
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;
}
grub-core/disk/ata.c
+23 -5
View File
@@ -255,8 +255,16 @@ grub_ata_readwrite (grub_disk_t disk, grub_disk_addr_t sector,
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;
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
{
@@ -266,9 +274,17 @@ grub_ata_readwrite (grub_disk_t disk, grub_disk_addr_t sector,
batch = 256;
else
batch = 1;
cmd = GRUB_ATA_CMD_READ_SECTORS;
cmd_write = GRUB_ATA_CMD_WRITE_SECTORS;
}
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)
grub-core/disk/pata.c
+1
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;
}