ide: remove stale comments from ide-dma.c (take 2) (204f47c5) · Commits · 戴 / test

drivers/ide/ide-dma.c

+4 −48

Original line number	Diff line number	Diff line
		/*
		* IDE DMA support (including IDE PCI BM-DMA).
		*
		* Copyright (C) 1995-1998 Mark Lord
		* Copyright (C) 1999-2000 Andre Hedrick <andre@linux-ide.org>
		* Copyright (C) 2004, 2007 Bartlomiej Zolnierkiewicz
		*
		* May be copied or modified under the terms of the GNU General Public License
		*
		* DMA is supported for all IDE devices (disk drives, cdroms, tapes, floppies).
		*/

		/*
		@@ -11,49 +15,6 @@
		*/

		/*
		* This module provides support for the bus-master IDE DMA functions
		* of various PCI chipsets, including the Intel PIIX (i82371FB for
		* the 430 FX chipset), the PIIX3 (i82371SB for the 430 HX/VX and
		* 440 chipsets), and the PIIX4 (i82371AB for the 430 TX chipset)
		* ("PIIX" stands for "PCI ISA IDE Xcellerator").
		*
		* Pretty much the same code works for other IDE PCI bus-mastering chipsets.
		*
		* DMA is supported for all IDE devices (disk drives, cdroms, tapes, floppies).
		*
		* By default, DMA support is prepared for use, but is currently enabled only
		* for drives which already have DMA enabled (UltraDMA or mode 2 multi/single),
		* or which are recognized as "good" (see table below). Drives with only mode0
		* or mode1 (multi/single) DMA should also work with this chipset/driver
		* (eg. MC2112A) but are not enabled by default.
		*
		* Use "hdparm -i" to view modes supported by a given drive.
		*
		* The hdparm-3.5 (or later) utility can be used for manually enabling/disabling
		* DMA support, but must be (re-)compiled against this kernel version or later.
		*
		* To enable DMA, use "hdparm -d1 /dev/hd?" on a per-drive basis after booting.
		* If problems arise, ide.c will disable DMA operation after a few retries.
		* This error recovery mechanism works and has been extremely well exercised.
		*
		* IDE drives, depending on their vintage, may support several different modes
		* of DMA operation. The boot-time modes are indicated with a "*" in
		* the "hdparm -i" listing, and can be changed with knowledgeable use of
		* the "hdparm -X" feature. There is seldom a need to do this, as drives
		* normally power-up with their "best" PIO/DMA modes enabled.
		*
		* Testing has been done with a rather extensive number of drives,
		* with Quantum & Western Digital models generally outperforming the pack,
		* and Fujitsu & Conner (and some Seagate which are really Conner) drives
		* showing more lackluster throughput.
		*
		* Keep an eye on /var/adm/messages for "DMA disabled" messages.
		*
		* Some people have reported trouble with Intel Zappa motherboards.
		* This can be fixed by upgrading the AMI BIOS to version 1.00.04.BS0,
		* available from ftp://ftp.intel.com/pub/bios/10004bs0.exe
		* (thanks to Glen Morrell <glen@spin.Stanford.edu> for researching this).
		*
		* Thanks to "Christopher J. Reimer" <reimer@doe.carleton.ca> for
		* fixing the problem with the BIOS on some Acer motherboards.
		*
		@@ -65,11 +26,6 @@
		*
		* Most importantly, thanks to Robert Bringman <rob@mars.trion.com>
		* for supplying a Promise UDMA board & WD UDMA drive for this work!
		*
		* And, yes, Intel Zappa boards really do use both PIIX IDE ports.
		*
		* ATA-66/100 and recovery functions, I forgot the rest......
		*
		*/

		#include <linux/module.h>

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