DMA ATA commands support
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parent
908a8fc37a
commit
51f7e1acb7
4 changed files with 33 additions and 5 deletions
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@ -398,6 +398,7 @@ grub_ahci_open (int id, int devnum, struct grub_ata *ata)
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grub_dprintf ("ahci", "opening AHCI dev `ahci%d'\n", dev->num);
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ata->data = dev;
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ata->dma = 0;
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return GRUB_ERR_NONE;
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}
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@ -255,8 +255,16 @@ grub_ata_readwrite (grub_disk_t disk, grub_disk_addr_t sector,
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if (addressing == GRUB_ATA_LBA48 && ((sector + size) >> 28) != 0)
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{
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batch = 65536;
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cmd = GRUB_ATA_CMD_READ_SECTORS_EXT;
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cmd_write = GRUB_ATA_CMD_WRITE_SECTORS_EXT;
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if (ata->dma)
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{
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cmd = GRUB_ATA_CMD_READ_SECTORS_DMA_EXT;
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cmd_write = GRUB_ATA_CMD_WRITE_SECTORS_DMA_EXT;
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}
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else
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{
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cmd = GRUB_ATA_CMD_READ_SECTORS_EXT;
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cmd_write = GRUB_ATA_CMD_WRITE_SECTORS_EXT;
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}
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}
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else
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{
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@ -266,9 +274,17 @@ grub_ata_readwrite (grub_disk_t disk, grub_disk_addr_t sector,
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batch = 256;
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else
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batch = 1;
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cmd = GRUB_ATA_CMD_READ_SECTORS;
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cmd_write = GRUB_ATA_CMD_WRITE_SECTORS;
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}
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if (ata->dma)
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{
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cmd = GRUB_ATA_CMD_READ_SECTORS_DMA;
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cmd_write = GRUB_ATA_CMD_WRITE_SECTORS_DMA;
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}
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else
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{
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cmd = GRUB_ATA_CMD_READ_SECTORS;
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cmd_write = GRUB_ATA_CMD_WRITE_SECTORS;
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}
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}
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grub_size_t nsectors = 0;
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while (nsectors < size)
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@ -285,6 +301,8 @@ grub_ata_readwrite (grub_disk_t disk, grub_disk_addr_t sector,
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parms.taskfile.cmd = (! rw ? cmd : cmd_write);
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parms.buffer = buf;
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parms.size = batch * GRUB_DISK_SECTOR_SIZE;
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if (ata->dma)
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parms.dma = 1;
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err = ata->dev->readwrite (ata, &parms);
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if (err)
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@ -474,6 +474,7 @@ grub_pata_open (int id, int devnum, struct grub_ata *ata)
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return err;
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ata->data = devfnd;
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ata->dma = 0;
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return GRUB_ERR_NONE;
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}
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@ -82,6 +82,9 @@ enum grub_ata_commands
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GRUB_ATA_CMD_PACKET = 0xa0,
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GRUB_ATA_CMD_READ_SECTORS = 0x20,
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GRUB_ATA_CMD_READ_SECTORS_EXT = 0x24,
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GRUB_ATA_CMD_READ_SECTORS_DMA = 0xc8,
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GRUB_ATA_CMD_READ_SECTORS_DMA_EXT = 0x25,
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GRUB_ATA_CMD_SECURITY_FREEZE_LOCK = 0xf5,
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GRUB_ATA_CMD_SET_FEATURES = 0xef,
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GRUB_ATA_CMD_SLEEP = 0xe6,
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@ -89,6 +92,8 @@ enum grub_ata_commands
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GRUB_ATA_CMD_STANDBY_IMMEDIATE = 0xe0,
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GRUB_ATA_CMD_WRITE_SECTORS = 0x30,
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GRUB_ATA_CMD_WRITE_SECTORS_EXT = 0x34,
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GRUB_ATA_CMD_WRITE_SECTORS_DMA_EXT = 0x35,
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GRUB_ATA_CMD_WRITE_SECTORS_DMA = 0xca,
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};
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enum grub_ata_timeout_milliseconds
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@ -151,6 +156,7 @@ struct grub_disk_ata_pass_through_parms
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int write;
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void *cmd;
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int cmdsize;
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int dma;
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};
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struct grub_ata
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@ -171,6 +177,8 @@ struct grub_ata
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/* Set to 0 for ATA, set to 1 for ATAPI. */
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int atapi;
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int dma;
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void *data;
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struct grub_ata_dev *dev;
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