commit cec85a37534fc8449308734c4d53fe8a31c2772c
Author: Matthew Dillon <dillon@apollo.backplane.com>
Date: Sat Jun 6 15:45:14 2009 -0700
AHCI - Hotplug. Increase timeout for BSY check, FIS adjusts for softreset, CAM
* Wait up to 3 seconds for BSY to clear. 1 second was not enough when
powering up an external 2.5" drive already connected to the port.
* It is unclear how other fields in the FIS should be initialized when
performing a soft reset. Zero the fields instead of inheriting whatever
junk was in the FIS from prior commands. This seems to fix random
errors from unplugging and plugging in a "My Book".
* Adjust the CAM devq to ensure that one ata_xfer remains available for error
processing. Do not clean out the devq when reducing the number of tags to
1 as we will not use NCQ in this case anyway and need the extra CCB for
error processing.
Summary of changes:
sys/dev/disk/ahci/ahci.c | 64 ++++++++++++++++++++++++++++++++---------
sys/dev/disk/ahci/ahci.h | 3 +-
sys/dev/disk/ahci/ahci_cam.c | 33 ++++++++++++++-------
sys/dev/disk/ahci/atascsi.h | 1 +
4 files changed, 75 insertions(+), 26 deletions(-)
http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/cec85a37534fc8449308734c4d53fe8a31c2772c
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