freebsd-nq/sys/dev/isci
Andrew Gallatin a2fc8ade10 isci: use maxphys rather than 128KB to size s/g list
In the conversion into a tunable, we converted the
size of the s/g list used by the driver to be based
off of a hardcoded size of 128k rather than maxphys,
this caused performance problems for us.  Revert this
to use the maxphys tunable.

Note that this constant is used to size dynamically allocated
things, and not static data structs, so this is safe.

Reviewed By:    imp, kib, mav
Tested By:i     dhw
Differential Revision: https://reviews.freebsd.org/D28023
Sponsored by: Netflix
2021-01-07 12:45:46 -05:00
..
scil isci: use maxphys rather than 128KB to size s/g list 2021-01-07 12:45:46 -05:00
environment.h
isci_controller.c
isci_domain.c
isci_interrupt.c
isci_io_request.c
isci_logger.c
isci_oem_parameters.c
isci_remote_device.c
isci_sysctl.c
isci_task_request.c
isci_timer.c
isci.c
isci.h
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.