From ade2daf9c6e57845fe83a24e0a9fa1c03c6e91b1 Mon Sep 17 00:00:00 2001 From: Bartlomiej Zolnierkiewicz Date: Sat, 26 Jan 2008 20:13:07 +0100 Subject: ide: make remaining built-in only IDE host drivers modular (take 2) * Make remaining built-in only IDE host drivers modular, add ide-scan-pci.c file for probing PCI host drivers registered with IDE core (special case for built-in IDE and CONFIG_IDEPCI_PCIBUS_ORDER=y) and then take care of the ordering in which all IDE host drivers are probed when IDE is built-in during link time. * Move probing of gayle, falconide, macide, q40ide and buddha (m68k arch specific) host drivers, before PCI ones (no PCI on m68k), ide-cris (cris arch specific), cmd640 (x86 arch specific) and pmac (ppc arch specific). * Move probing of ide-cris (cris arch specific) host driver before cmd640 (x86 arch specific). * Move probing of mpc8xx (ppc specific) host driver before ide-pnp (depends on ISA and none of ppc platform that use mpc8xx supports ISA) and ide-h8300 (h8300 arch specific). * Add "probe_vlb" kernel parameter to cmd640 host driver and update Documentation/ide.txt accordingly. * Make IDE_ARM config option visible so it can also be disabled if needed. * Remove bogus comment from ide.c while at it. v2: * Fix two issues spotted by Sergei: - replace ENOMEM error value by ENOENT in ide-h8300 host driver - fix MODULE_PARM_DESC() in cmd640 host driver Cc: Sergei Shtylyov Cc: Mikael Starvik Cc: Geert Uytterhoeven Cc: Roman Zippel Cc: Benjamin Herrenschmidt Signed-off-by: Bartlomiej Zolnierkiewicz --- Documentation/ide.txt | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) (limited to 'Documentation') diff --git a/Documentation/ide.txt b/Documentation/ide.txt index 1d50f23..b29ccb4 100644 --- a/Documentation/ide.txt +++ b/Documentation/ide.txt @@ -30,7 +30,7 @@ *** *** The CMD640 is also used on some Vesa Local Bus (VLB) cards, and is *NOT* *** automatically detected by Linux. For safe, reliable operation with such -*** interfaces, one *MUST* use the "ide0=cmd640_vlb" kernel option. +*** interfaces, one *MUST* use the "cmd640.probe_vlb" kernel option. *** *** Use of the "serialize" option is no longer necessary. @@ -292,9 +292,6 @@ The following are valid ONLY on ide0, which usually corresponds to the first ATA interface found on the particular host, and the defaults for the base,ctl ports must not be altered. - "ide0=cmd640_vlb" : *REQUIRED* for VLB cards with the CMD640 chip - (not for PCI -- automatically detected) - "ide=doubler" : probe/support IDE doublers on Amiga There may be more options than shown -- use the source, Luke! @@ -310,6 +307,10 @@ i.e. to enable probing for ALI M14xx chipsets (ali14xx host driver) use: * "probe" module parameter when ali14xx driver is compiled as module ("modprobe ali14xx probe") +Also for legacy CMD640 host driver (cmd640) you need to use "probe_vlb" +kernel paremeter to enable probing for VLB version of the chipset (PCI ones +are detected automatically). + ================================================================================ IDE ATAPI streaming tape driver -- cgit v1.1 From 9e47be0c97f7357b80e91dc0632e9cce2eb025e0 Mon Sep 17 00:00:00 2001 From: Bartlomiej Zolnierkiewicz Date: Sat, 26 Jan 2008 20:13:09 +0100 Subject: ide: remove broken disk byte-swapping support Remove broken disk byte-swapping support: - it can cause a data corruption on SMP (or if using PREEMPT on UP) - all data coming from disk are byte-swapped by taskfile_*_data() which results in incorrect identify data being reported by /proc/ide/ and IOCTLs - "hdx=bswap/byteswap" kernel parameter has been broken on m68k host drivers (including Atari/Q40 ones) since 2.5.x days (because of 'hwif' zero-ing) - byte-swapping is limited to PIO transfers (for working with TiVo disks on x86 machines using user-space solutions or dm-byteswap should result in much better performance because DMA can be used) For previous discussions please see: http://www.ussg.iu.edu/hypermail/linux/kernel/0201.0/0768.html http://lkml.org/lkml/2004/2/28/111 [ I have dm-byteswap device mapper target if somebody is interested (patch is for 2.6.4 though but I'll dust it off if needed). ] Acked-by: Sergei Shtylyov Signed-off-by: Bartlomiej Zolnierkiewicz --- Documentation/ide.txt | 4 ---- 1 file changed, 4 deletions(-) (limited to 'Documentation') diff --git a/Documentation/ide.txt b/Documentation/ide.txt index b29ccb4..94e2e3b 100644 --- a/Documentation/ide.txt +++ b/Documentation/ide.txt @@ -244,10 +244,6 @@ Summary of ide driver parameters for kernel command line "hdx=nodma" : disallow DMA - "hdx=swapdata" : when the drive is a disk, byte swap all data - - "hdx=bswap" : same as above.......... - "hdx=scsi" : the return of the ide-scsi flag, this is useful for allowing ide-floppy, ide-tape, and ide-cdrom|writers to use ide-scsi emulation on a device specific option. -- cgit v1.1