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libata: implement protocol tests

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Implement protocol tests - ata_is_atapi(), ata_is_nodata(),
ata_is_pio(), ata_is_dma(), ata_is_ncq() and ata_is_data() and use
them to replace is_atapi_taskfile() and hard coded protocol tests.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Tejun Heo
2007-11-27 19:28:53 +09:00
committed by Jeff Garzik
parent f20ded38aa
commit 405e66b387
7 changed files with 82 additions and 65 deletions
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71
include/linux/ata.h
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@@ -324,6 +324,13 @@ enum {
ATA_TFLAG_LBA = (1 << 4), /* enable LBA */
ATA_TFLAG_FUA = (1 << 5), /* enable FUA */
ATA_TFLAG_POLLING = (1 << 6), /* set nIEN to 1 and use polling */
/* protocol flags */
ATA_PROT_FLAG_PIO = (1 << 0), /* is PIO */
ATA_PROT_FLAG_DMA = (1 << 1), /* is DMA */
ATA_PROT_FLAG_DATA = ATA_PROT_FLAG_PIO | ATA_PROT_FLAG_DMA,
ATA_PROT_FLAG_NCQ = (1 << 2), /* is NCQ */
ATA_PROT_FLAG_ATAPI = (1 << 3), /* is ATAPI */
};
enum ata_tf_protocols {
@@ -373,6 +380,63 @@ struct ata_taskfile {
u8 command; /* IO operation */
};
/*
* protocol tests
*/
static inline unsigned int ata_prot_flags(u8 prot)
{
switch (prot) {
case ATA_PROT_NODATA:
return 0;
case ATA_PROT_PIO:
return ATA_PROT_FLAG_PIO;
case ATA_PROT_DMA:
return ATA_PROT_FLAG_DMA;
case ATA_PROT_NCQ:
return ATA_PROT_FLAG_DMA | ATA_PROT_FLAG_NCQ;
case ATA_PROT_ATAPI_NODATA:
return ATA_PROT_FLAG_ATAPI;
case ATA_PROT_ATAPI:
return ATA_PROT_FLAG_ATAPI | ATA_PROT_FLAG_PIO;
case ATA_PROT_ATAPI_DMA:
return ATA_PROT_FLAG_ATAPI | ATA_PROT_FLAG_DMA;
}
return 0;
}
static inline int ata_is_atapi(u8 prot)
{
return ata_prot_flags(prot) & ATA_PROT_FLAG_ATAPI;
}
static inline int ata_is_nodata(u8 prot)
{
return !(ata_prot_flags(prot) & ATA_PROT_FLAG_DATA);
}
static inline int ata_is_pio(u8 prot)
{
return ata_prot_flags(prot) & ATA_PROT_FLAG_PIO;
}
static inline int ata_is_dma(u8 prot)
{
return ata_prot_flags(prot) & ATA_PROT_FLAG_DMA;
}
static inline int ata_is_ncq(u8 prot)
{
return ata_prot_flags(prot) & ATA_PROT_FLAG_NCQ;
}
static inline int ata_is_data(u8 prot)
{
return ata_prot_flags(prot) & ATA_PROT_FLAG_DATA;
}
/*
* id tests
*/
#define ata_id_is_ata(id) (((id)[0] & (1 << 15)) == 0)
#define ata_id_has_lba(id) ((id)[49] & (1 << 9))
#define ata_id_has_dma(id) ((id)[49] & (1 << 8))
@@ -594,13 +658,6 @@ static inline int atapi_command_packet_set(const u16 *dev_id)
return (dev_id[0] >> 8) & 0x1f;
}
static inline int is_atapi_taskfile(const struct ata_taskfile *tf)
{
return (tf->protocol == ATA_PROT_ATAPI) ||
(tf->protocol == ATA_PROT_ATAPI_NODATA) ||
(tf->protocol == ATA_PROT_ATAPI_DMA);
}
static inline int is_multi_taskfile(struct ata_taskfile *tf)
{
return (tf->command == ATA_CMD_READ_MULTI) ||