git: AHCI/SILI - Send dummy SETXFER mode even though it is SATA
commit 69b3741eda7a43961baaf659f4c99e8ad054a899
Author: Matthew Dillon <dillon@apollo.backplane.com>
Date: Tue Nov 3 10:00:14 2009 -0800
AHCI/SILI - Send dummy SETXFER mode even though it is SATA
* If the identify structure contains a non-zero/non-FFFF dmamode field
we send a dummy SETXFER mode command to the device.
* Most SATA DISK devices set this field to 0 or FFFF and in this case no
SETXFER mode command is sent. SETXFER is non-applicable to SATA in
general.
Most ATAPI devices still initialize the dmamode field and some ATAPI
devices still require SETXFER to be sent even though they are native SATA.
SATA->PATA converters may require a SETXFER to be passed through before
the PATA devices will operate properly. In this case the dmamode field
will likely be initialized.
Summary of changes:
sys/dev/disk/ahci/ahci_cam.c | 67 ++++++++++++++++++++++++++++++++++++++++++
sys/dev/disk/ahci/atascsi.h | 1 +
sys/dev/disk/sili/atascsi.h | 1 +
sys/dev/disk/sili/sili_cam.c | 67 ++++++++++++++++++++++++++++++++++++++++++
4 files changed, 136 insertions(+), 0 deletions(-)
http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/69b3741eda7a43961baaf659f4c99e8ad054a899
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