| Message ID | 1291231032-21150-6-git-send-email-agraf@suse.de |
|---|---|
| State | New |
| Headers | show |
On Wed, Dec 1, 2010 at 7:17 PM, Alexander Graf <agraf@suse.de> wrote: > From: Roland Elek <elek.roland@gmail.com> > > I modified ide_identify() to include the zero-based queue length > value in word 75, and set bit 8 in word 76 to signal NCQ support > in the identify data for AHCI SATA drives. > > Signed-off-by: Roland Elek <elek.roland@gmail.com> > --- > hw/ide/core.c | 7 +++++++ > hw/ide/internal.h | 2 ++ > 2 files changed, 9 insertions(+), 0 deletions(-) Reviewed-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
diff --git a/hw/ide/core.c b/hw/ide/core.c index 1680a38..cac209e 100644 --- a/hw/ide/core.c +++ b/hw/ide/core.c @@ -147,6 +147,13 @@ static void ide_identify(IDEState *s) put_le16(p + 66, 120); put_le16(p + 67, 120); put_le16(p + 68, 120); + + if (s->ncq_queues) { + put_le16(p + 75, s->ncq_queues - 1); + /* NCQ supported */ + put_le16(p + 76, (1 << 8)); + } + put_le16(p + 80, 0xf0); /* ata3 -> ata6 supported */ put_le16(p + 81, 0x16); /* conforms to ata5 */ /* 14=NOP supported, 5=WCACHE supported, 0=SMART supported */ diff --git a/hw/ide/internal.h b/hw/ide/internal.h index 1b5e738..85cb938 100644 --- a/hw/ide/internal.h +++ b/hw/ide/internal.h @@ -452,6 +452,8 @@ struct IDEState { int smart_errors; uint8_t smart_selftest_count; uint8_t *smart_selftest_data; + /* AHCI */ + int ncq_queues; }; /* This struct represents a device that uses an IDE bus, but requires