freebsd-skq/sys/dev/isci
Steven Hartland 85c9dd9d89 Prevent overflow issues in timeout processing
Previously, any timeout value for which (timeout * hz) will overflow the
signed integer, will give weird results, since callout(9) routines will
convert negative values of ticks to '1'. For unsigned integer overflow we
will get sufficiently smaller timeout values than expected.

Switch from callout_reset, which requires conversion to int based ticks
to callout_reset_sbt to avoid this.

Also correct isci to correctly resolve ccb timeout.

This was based on the original work done by Eygene Ryabinkin
<rea@freebsd.org> back in 5 Aug 2011 which used a macro to help avoid
the overlow.

Differential Revision:	https://reviews.freebsd.org/D1157
Reviewed by:	mav, davide
MFC after:	1 month
Sponsored by:	Multiplay
2014-11-21 21:01:24 +00:00
..
scil
environment.h
isci_controller.c In rare cases, a SATA drive can stop responding to commands and trigger a 2014-06-30 01:01:54 +00:00
isci_domain.c
isci_interrupt.c
isci_io_request.c Prevent overflow issues in timeout processing 2014-11-21 21:01:24 +00:00
isci_logger.c
isci_oem_parameters.c
isci_remote_device.c
isci_sysctl.c In rare cases, a SATA drive can stop responding to commands and trigger a 2014-06-30 01:01:54 +00:00
isci_task_request.c In rare cases, a SATA drive can stop responding to commands and trigger a 2014-06-30 01:01:54 +00:00
isci_timer.c Prevent overflow issues in timeout processing 2014-11-21 21:01:24 +00:00
isci.c
isci.h In rare cases, a SATA drive can stop responding to commands and trigger a 2014-06-30 01:01:54 +00:00
README
sci_environment.h
types.h

FreeBSD Driver for Intel(R) C600 SAS Controller
===============================================

This driver has been developed for use with FreeBSD, version 9.0 and later.

This driver uses an OS-agnostic abstraction layer library named SCIL that is
published by Intel specifically for the C600 SAS controller.  The SAS
controller has no firmware, so the driver is extensive and using SCIL
minimizes the development and maintenance cost of the driver.

The FreeBSD implementation files are in the isci directory, and SCIL files
are in the isci/scil subdirectory.  As Intel publishes new versions of SCIL
(to add features or fix bugs), the isci/scil subdirectory will be updated
appropriately.