mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-05 08:07:10 +07:00
f629b38bed
Always use "fast" MWDMA support and remove dma_{black,white}_list
(they were based on completely bogus ->ide_dma_check implementation
which didn't set neither the host controller timings nor the device
for the desired transfer mode).
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
127 lines
4.1 KiB
Plaintext
127 lines
4.1 KiB
Plaintext
README for MIPS AU1XXX IDE driver - Released 2005-07-15
|
|
|
|
ABOUT
|
|
-----
|
|
This file describes the 'drivers/ide/mips/au1xxx-ide.c', related files and the
|
|
services they provide.
|
|
|
|
If you are short in patience and just want to know how to add your hard disc to
|
|
the white or black list, go to the 'ADD NEW HARD DISC TO WHITE OR BLACK LIST'
|
|
section.
|
|
|
|
|
|
LICENSE
|
|
-------
|
|
|
|
Copyright (c) 2003-2005 AMD, Personal Connectivity Solutions
|
|
|
|
This program is free software; you can redistribute it and/or modify it under
|
|
the terms of the GNU General Public License as published by the Free Software
|
|
Foundation; either version 2 of the License, or (at your option) any later
|
|
version.
|
|
|
|
THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
|
|
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
|
|
FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR
|
|
BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
POSSIBILITY OF SUCH DAMAGE.
|
|
|
|
You should have received a copy of the GNU General Public License along with
|
|
this program; if not, write to the Free Software Foundation, Inc.,
|
|
675 Mass Ave, Cambridge, MA 02139, USA.
|
|
|
|
Note: for more information, please refer "AMD Alchemy Au1200/Au1550 IDE
|
|
Interface and Linux Device Driver" Application Note.
|
|
|
|
|
|
FILES, CONFIGS AND COMPATABILITY
|
|
--------------------------------
|
|
|
|
Two files are introduced:
|
|
|
|
a) 'include/asm-mips/mach-au1x00/au1xxx_ide.h'
|
|
containes : struct _auide_hwif
|
|
timing parameters for PIO mode 0/1/2/3/4
|
|
timing parameters for MWDMA 0/1/2
|
|
|
|
b) 'drivers/ide/mips/au1xxx-ide.c'
|
|
contains the functionality of the AU1XXX IDE driver
|
|
|
|
Four configs variables are introduced:
|
|
|
|
CONFIG_BLK_DEV_IDE_AU1XXX_PIO_DBDMA - enable the PIO+DBDMA mode
|
|
CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA - enable the MWDMA mode
|
|
CONFIG_BLK_DEV_IDE_AU1XXX_BURSTABLE_ON - set Burstable FIFO in DBDMA
|
|
controller
|
|
CONFIG_BLK_DEV_IDE_AU1XXX_SEQTS_PER_RQ - maximum transfer size
|
|
per descriptor
|
|
|
|
|
|
SUPPORTED IDE MODES
|
|
-------------------
|
|
|
|
The AU1XXX IDE driver supported all PIO modes - PIO mode 0/1/2/3/4 - and all
|
|
MWDMA modes - MWDMA 0/1/2 -. There is no support for SWDMA and UDMA mode.
|
|
|
|
To change the PIO mode use the program hdparm with option -p, e.g.
|
|
'hdparm -p0 [device]' for PIO mode 0. To enable the MWDMA mode use the option
|
|
-X, e.g. 'hdparm -X32 [device]' for MWDMA mode 0.
|
|
|
|
|
|
PERFORMANCE CONFIGURATIONS
|
|
--------------------------
|
|
|
|
If the used system doesn't need USB support enable the following kernel configs:
|
|
|
|
CONFIG_IDE=y
|
|
CONFIG_BLK_DEV_IDE=y
|
|
CONFIG_IDE_GENERIC=y
|
|
CONFIG_BLK_DEV_IDEPCI=y
|
|
CONFIG_BLK_DEV_GENERIC=y
|
|
CONFIG_BLK_DEV_IDEDMA_PCI=y
|
|
CONFIG_IDEDMA_PCI_AUTO=y
|
|
CONFIG_BLK_DEV_IDE_AU1XXX=y
|
|
CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA=y
|
|
CONFIG_BLK_DEV_IDE_AU1XXX_SEQTS_PER_RQ=128
|
|
CONFIG_BLK_DEV_IDEDMA=y
|
|
CONFIG_IDEDMA_AUTO=y
|
|
|
|
Also define 'IDE_AU1XXX_BURSTMODE' in 'drivers/ide/mips/au1xxx-ide.c' to enable
|
|
the burst support on DBDMA controller.
|
|
|
|
If the used system need the USB support enable the following kernel configs for
|
|
high IDE to USB throughput.
|
|
|
|
CONFIG_BLK_DEV_IDEDISK=y
|
|
CONFIG_IDE_GENERIC=y
|
|
CONFIG_BLK_DEV_IDEPCI=y
|
|
CONFIG_BLK_DEV_GENERIC=y
|
|
CONFIG_BLK_DEV_IDEDMA_PCI=y
|
|
CONFIG_IDEDMA_PCI_AUTO=y
|
|
CONFIG_BLK_DEV_IDE_AU1XXX=y
|
|
CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA=y
|
|
CONFIG_BLK_DEV_IDE_AU1XXX_SEQTS_PER_RQ=128
|
|
CONFIG_BLK_DEV_IDEDMA=y
|
|
CONFIG_IDEDMA_AUTO=y
|
|
|
|
Also undefine 'IDE_AU1XXX_BURSTMODE' in 'drivers/ide/mips/au1xxx-ide.c' to
|
|
disable the burst support on DBDMA controller.
|
|
|
|
|
|
ACKNOWLEDGMENTS
|
|
---------------
|
|
|
|
These drivers wouldn't have been done without the base of kernel 2.4.x AU1XXX
|
|
IDE driver from AMD.
|
|
|
|
Additional input also from:
|
|
Matthias Lenk <matthias.lenk@amd.com>
|
|
|
|
Happy hacking!
|
|
Enrico Walther <enrico.walther@amd.com>
|