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| author |   Jens Axboe <jens.axboe@oracle.com> | 2008-09-24 13:05:10 +0200 |
|---|---|---|
| committer | Jens Axboe <jens.axboe@oracle.com> | 2008-10-09 08:56:19 +0200 |
| commit | 8bff7c6b0f63c7ee9c5e3a076338d74125b8debb (patch) | |
| tree | 0863c7e0d09592ee9f4d568625348ef12e4a30df /include/linux/ata.h | |
| parent | block: add queue flag for SSD/non-rotational devices (diff) | |
| download | linux-dev-8bff7c6b0f63c7ee9c5e3a076338d74125b8debb.tar.xz linux-dev-8bff7c6b0f63c7ee9c5e3a076338d74125b8debb.zip | |
libata: set queue SSD flag for SSD devices
SSD devices should give an RPM setting of 1 in word 217 of the ID
page. If we see such a device, tell the block layer about it.
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'include/linux/ata.h')
| -rw-r--r-- | include/linux/ata.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/ata.h b/include/linux/ata.h index 8a12d718c169..c1c8b4a4ba26 100644 --- a/include/linux/ata.h +++ b/include/linux/ata.h @@ -88,6 +88,7 @@ enum { ATA_ID_DLF = 128, ATA_ID_CSFO = 129, ATA_ID_CFA_POWER = 160, + ATA_ID_ROT_SPEED = 217, ATA_ID_PIO4 = (1 << 1), ATA_ID_SERNO_LEN = 20, @@ -691,6 +692,11 @@ static inline int ata_id_is_cfa(const u16 *id) return 0; } +static inline int ata_id_is_ssd(const u16 *id) +{ + return id[ATA_ID_ROT_SPEED] == 0x01; +} + static inline int ata_drive_40wire(const u16 *dev_id) { if (ata_id_is_sata(dev_id)) |