* Rename CMD_TBL_HDR to CMD_TBL_HDR_SZ as it's size not offset.
* Define MAX_CMDS and CMD_SZ and use them in calculation of other
constants.
* Define CMD_TBL_AR_SZ as product of CMD_TBL_SZ and MAX_CMDS, and use
it when calculating PRIV_DMA_SZ.
* CMD_SLOT_SZ is also dependent on MAX_CMDS but hasn't been changed
because I didn't want to change the value used by the original code
(32 commands). Later NCQ change will bump MAX_CMDS to 32 anyway and
the hard coded 32 can be changed to MAX_CMDS then.
* Reorder HOST_CAP_* flags.
---
drivers/scsi/ahci.c | 15 +++++++++------
1 files changed, 9 insertions(+), 6 deletions(-)
e24ebe47347cf08d2c2b57923b3948732e94b7f3
diff --git a/drivers/scsi/ahci.c b/drivers/scsi/ahci.c
index 680dd5b..1177ae5 100644
--- a/drivers/scsi/ahci.c
+++ b/drivers/scsi/ahci.c
@@ -56,12 +56,15 @@ enum {
AHCI_MAX_SG = 168, /* hardware max is 64K */
AHCI_DMA_BOUNDARY = 0xffffffff,
AHCI_USE_CLUSTERING = 0,
- AHCI_CMD_SLOT_SZ = 32 * 32,
+ AHCI_MAX_CMDS = 1,
+ AHCI_CMD_SZ = 32,
+ AHCI_CMD_SLOT_SZ = 32 * AHCI_CMD_SZ,
AHCI_RX_FIS_SZ = 256,
- AHCI_CMD_TBL_HDR = 0x80,
AHCI_CMD_TBL_CDB = 0x40,
- AHCI_CMD_TBL_SZ = AHCI_CMD_TBL_HDR + (AHCI_MAX_SG * 16),
- AHCI_PORT_PRIV_DMA_SZ = AHCI_CMD_SLOT_SZ + AHCI_CMD_TBL_SZ +
+ AHCI_CMD_TBL_HDR_SZ = 0x80,
+ AHCI_CMD_TBL_SZ = AHCI_CMD_TBL_HDR_SZ + (AHCI_MAX_SG * 16),
+ AHCI_CMD_TBL_AR_SZ = AHCI_CMD_TBL_SZ * AHCI_MAX_CMDS,
+ AHCI_PORT_PRIV_DMA_SZ = AHCI_CMD_SLOT_SZ + AHCI_CMD_TBL_AR_SZ +
AHCI_RX_FIS_SZ,
AHCI_IRQ_ON_SG = (1 << 31),
AHCI_CMD_ATAPI = (1 << 5),
@@ -89,8 +92,8 @@ enum {
HOST_AHCI_EN = (1 << 31), /* AHCI enabled */
/* HOST_CAP bits */
- HOST_CAP_64 = (1 << 31), /* PCI DAC (64-bit DMA) support */
HOST_CAP_CLO = (1 << 24), /* Command List Override support */
+ HOST_CAP_64 = (1 << 31), /* PCI DAC (64-bit DMA) support */
/* registers for each SATA port */
PORT_LST_ADDR = 0x00, /* command list DMA addr */
@@ -393,7 +396,7 @@ static int ahci_port_start(struct ata_po
pp->cmd_tbl = mem;
pp->cmd_tbl_dma = mem_dma;
- pp->cmd_tbl_sg = mem + AHCI_CMD_TBL_HDR;
+ pp->cmd_tbl_sg = mem + AHCI_CMD_TBL_HDR_SZ;
ap->private_data = pp;
--
1.2.4
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