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2005-08-18[PATCH] serverworks: add support for new southbridge IDENarendra Sankar
BCM5785 (HT1000) is a Opteron Southbridge from Serverworks/Broadcom that incorporates a single channel ATA100 IDE controller that is functionally identical to the Serverworks CSB6 IDE controller. This patch adds support for the new PCI device ID and also the support for this controller. Signed-off-by: Narendra Sankar <nsankar@broadcom.com> Acked-by: Jeff Garzik <jgarzik@pobox.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@elka.pw.edu.pl>
2005-08-18[PATCH] ide: add support for Netcell Revolution to pci-ide generic driverMatt Gillette
Adds support for Netcell Revolution to pci-ide generic driver by including it in the list of devices matched. Includes the Revolution in the list of simplex devices forced into DMA mode. Signed-off-by: Matt Gillette <matt.gillette@netcell.com> Cc: Bartlomiej Zolnierkiewicz <B.Zolnierkiewicz@elka.pw.edu.pl> Cc: Jeff Garzik <jgarzik@pobox.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@elka.pw.edu.pl>
2005-08-18[PATCH] ide: fix PCI_DEVIEC_ID_APPLE_UNI_N_ATA spellingGrant Coady
Signed-off-by: Grant Coady <gcoady@gmail.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@elka.pw.edu.pl>
2005-08-18[PATCH] ide: fix the BLK_DEV_IDEDMA_PCI dependency for drivers/ide/ppc/pmac.cJuha-Matti Tapio
drivers/ide/ppc/pmac.c uses symbols ide_build_sglist, __ide_dma_off_quietly, __ide_dma_on and __ide_dma_timeout when CONFIG_BLK_DEV_IDEDMA_PMAC is defined. The declarations for these symbols (in ide.h) depend on CONFIG_BLK_DEV_IDEDMA_PCI. There is a missing dependency for this in drivers/ide/Kconfig which causes drivers/ide/ppc/pmac.c to fail to build if CONFIG_BLK_DEV_IDEDMA_PMAC is selected but CONFIG_BLK_DEV_IDEDMA_PCI is not. Signed-off-by: Juha-Matti Tapio <jmtapio@verkkotelakka.net> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@elka.pw.edu.pl>
2005-08-18[PATCH] ide-floppy: fix IDEFLOPPY_TICKS_DELAYBartlomiej Zolnierkiewicz
* IDEFLOPPY_TICKS_DELAY assumed HZ == 100, fix it * increase the delay to 50ms (to match comment in the code) Thanks to Manfred Scherer <manfred.scherer.mhm@t-online.de> for reporting the problem and testing the patch. Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@elka.pw.edu.pl>
2005-08-09[PATCH] Fix ide-disk.c oops caused by hwif == NULLChristoph Lameter
1. Move hwif_to_node to ide.h 2. Use hwif_to_node in ide-disk.c Signed-off-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-08-04[PATCH] ide: fix kmalloc_node breakage in ide driverRavikiran G Thirumalai
Patch fixes oops caused by ide interfaces not on pci. pcibus_to_node causes the kernel to crash otherwise. Patch also adds a BUG_ON to check if hwif is NULL. Signed-off-by: Christoph Lameter <christoph@lameter.com> Signed-off-by: Shai Fultheim <shai@scalex86.org> Signed-off-by: Ravikiran Thirumalai <kiran@scalex86.org> Cc: Andi Kleen <ak@muc.de> Cc: Bartlomiej Zolnierkiewicz <B.Zolnierkiewicz@elka.pw.edu.pl> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-08-01[PATCH] pcmcia: defer ide-cs initialization after other IDE drivers started upDominik Brodowski
Avoid registering PCMCIA CF cards before other IDE stuff. This means the risk of /dev/hd* being re-ordered is lessened. The _sane_ thing to assert any ordering is to use udev, nameif and so on, of course. Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-07-28[PATCH] pcmcia: fix many device IDsKomuro
If the product-id-string contains the '+' , '&' ,'_', it was not converted properly from the /etc/pcmcia/config(pcmcia-cs config file). Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-07-28[PATCH] pcmcia: ide-cs id_table updatePavel Roskin
SanDisk ConnectPlus has two functions. Function 0 is prism2 card, currently only supported by HostAP (not in the kernel). Function 1 is 128M flash, supported by ide-cs. This patch adds an entry for function 1 to ide-cs.c. Signed-off-by: Pavel Roskin <proski@gnu.org> Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-07-27[PATCH] Update CREDITS entry and listings in source files for Jesper JuhlJesper Juhl
a) update entry in CREDITS for Jesper Juhl b) remove email address from source files so it's only listed in credits. Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-07-27[PATCH] clean up inline static vs static inlineJesper Juhl
`gcc -W' likes to complain if the static keyword is not at the beginning of the declaration. This patch fixes all remaining occurrences of "inline static" up with "static inline" in the entire kernel tree (140 occurrences in 47 files). While making this change I came across a few lines with trailing whitespace that I also fixed up, I have also added or removed a blank line or two here and there, but there are no functional changes in the patch. Signed-off-by: Jesper Juhl <juhl-lkml@dif.dk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-07-27[PATCH] CRIS IDE driverMikael Starvik
* Added abstraction layer for subarchs. * Added v32 support. * Renamed driver. Signed-off-by: Mikael Starvik <starvik@axis.com> Acked-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-07-12[PATCH] quiet ide-cd warningMatt Mackall
This shuts up a potential uninitialized variable warning. Signed-off-by: Matt Mackall <mpm@selenic.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-07-07[PATCH] pcmcia: remove references to pcmcia/version.hDominik Brodowski
As a follow-up, remove the inclusion of pcmcia/version.h in many files. Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-07-07[PATCH] pcmcia: move event handlerDominik Brodowski
Move the "event handler" to struct pcmcia_driver -- the unified event handler will disappear really soon, but switching it to struct pcmcia_driver in the meantime allows for better "step-by-step" patches. Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-07-06[PATCH] openfirmware: generate device table for userspaceJeff Mahoney
This converts the usage of struct of_match to struct of_device_id, similar to pci_device_id. This allows a device table to be generated, which can be parsed by depmod(8) to generate a map file for module loading. In order for hotplug to work with macio devices, patches to module-init-tools and hotplug must be applied. Those patches are available at: ftp://ftp.suse.com/pub/people/jeffm/linux/macio-hotplug/ Signed-off-by: Jeff Mahoney <jeffm@suse.com> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-07-05Merge master.kernel.org:/pub/scm/linux/kernel/git/gregkh/pci-2.6Linus Torvalds
2005-07-03[PATCH] drivers/ide/Makefile: kill dead CONFIG_BLK_DEV_IDE_TCQ entryAdrian Bunk
This patch kills the dead CONFIG_BLK_DEV_IDE_TCQ entry. Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@elka.pw.edu.pl>
2005-07-03[PATCH] amd74xx: support MCP55 device IDsRob Punkunus
From: Rob Punkunus <rpunkunus@nvidia.com> Rob Punkunus recently submitted a patch to enable support for MCP51/MCP55 in the amd74xx driver. This patch was whitespace-corrupted and didn't apply to 2.6.12 since MCP51 support was merged in the 2.6.12-rc series. Gentoo would like to support this hardware for our upcoming release media, so I fixed the patch, and here it is :) Signed-off-by: Daniel Drake <dsd@gentoo.org> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@elka.pw.edu.pl>
2005-07-03[PATCH] ide: fix line break in ide messagesDenis Vlasenko
From: Denis Vlasenko <vda@ilport.com.ua> * printk("\n") is misplaced, resulting in stray empty line in kernel log * cleanups nerby: some back-to-back printks are combined, etc Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@elka.pw.edu.pl>
2005-07-03[PATCH] ide: hotplug mark __devinit via82cxxx.cHerbert Xu
From: Herbert Xu <herbert@gondor.apana.org.au> mark the __init section __devinit. Splitted up from the Debian kernel patch. Signed-off-by: maximilian attems <janitor@sternwelten.at> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@elka.pw.edu.pl>
2005-07-03[PATCH] ide: hotplug mark __devinit triflex.cHerbert Xu
From: Herbert Xu <herbert@gondor.apana.org.au> mark the __init section __devinit. Splitted up from the Debian kernel patch. Signed-off-by: maximilian attems <janitor@sternwelten.at> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@elka.pw.edu.pl>
2005-07-03[PATCH] ide: hotplug mark __devinit slc90e66.cHerbert Xu
From: Herbert Xu <herbert@gondor.apana.org.au> mark the __init section __devinit. Splitted up from the Debian kernel patch. Signed-off-by: maximilian attems <janitor@sternwelten.at> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@elka.pw.edu.pl>
2005-07-03[PATCH] ide: hotplug mark __devinit sl82c105.cHerbert Xu
From: Herbert Xu <herbert@gondor.apana.org.au> mark the __init section __devinit. Splitted up from the Debian kernel patch. Signed-off-by: maximilian attems <janitor@sternwelten.at> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@elka.pw.edu.pl>
2005-07-03[PATCH] ide: hotplug mark __devinit sc1200.cHerbert Xu
From: Herbert Xu <herbert@gondor.apana.org.au> mark the __init section __devinit. Splitted up from the Debian kernel patch. Signed-off-by: maximilian attems <janitor@sternwelten.at> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@elka.pw.edu.pl>
2005-07-03[PATCH] ide: hotplug mark __devinit opti621.cHerbert Xu
From: Herbert Xu <herbert@gondor.apana.org.au> mark the __init section __devinit. Splitted up from the Debian kernel patch. Signed-off-by: maximilian attems <janitor@sternwelten.at> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@elka.pw.edu.pl>
2005-07-03[PATCH] ide: hotplug mark __devinit ns87415.cHerbert Xu
From: Herbert Xu <herbert@gondor.apana.org.au> mark the __init section __devinit. Splitted up from the Debian kernel patch. Signed-off-by: maximilian attems <janitor@sternwelten.at> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@elka.pw.edu.pl>
2005-07-03[PATCH] ide: hotplug mark __devinit it8172.cHerbert Xu
From: Herbert Xu <herbert@gondor.apana.org.au> mark the __init section __devinit. Splitted up from the Debian kernel patch. Signed-off-by: maximilian attems <janitor@sternwelten.at> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@elka.pw.edu.pl>
2005-07-03[PATCH] ide: hotplug mark __devinit cy82c693.cHerbert Xu
From: Herbert Xu <herbert@gondor.apana.org.au> mark the __init section __devinit. Splitted up from the Debian kernel patch. Signed-off-by: maximilian attems <janitor@sternwelten.at> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@elka.pw.edu.pl>
2005-07-03[PATCH] ide: hotplug mark __devinit cs5530.cHerbert Xu
From: Herbert Xu <herbert@gondor.apana.org.au> mark the __init section __devinit. Splitted up from the Debian kernel patch. Signed-off-by: maximilian attems <janitor@sternwelten.at> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@elka.pw.edu.pl>
2005-07-03[PATCH] ide: hotplug mark __devinit amd74xx.cHerbert Xu
From: Herbert Xu <herbert@gondor.apana.org.au> mark the __init section __devinit. Splitted up from the Debian kernel patch. Signed-off-by: maximilian attems <janitor@sternwelten.at> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@elka.pw.edu.pl>
2005-07-03[PATCH] ide: hotplug mark __devinit alim15x3.cHerbert Xu
From: Herbert Xu <herbert@gondor.apana.org.au> mark the __init section __devinit. Splitted up from the Debian kernel patch. see the thread about the pci hotplug crash on a stratus box. http://marc.theaimsgroup.com/?l=linux-kernel&m=111930108613386&w=2 Signed-off-by: maximilian attems <janitor@sternwelten.at> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@elka.pw.edu.pl>
2005-07-01[PATCH] PCI: clean up dynamic pci id logicGreg Kroah-Hartman
The dynamic pci id logic has been bothering me for a while, and now that I started to look into how to move some of this to the driver core, I thought it was time to clean it all up. It ends up making the code smaller, and easier to follow, and fixes a few bugs at the same time (dynamic ids were not being matched everywhere, and so could be missed on some call paths for new devices, semaphore not needed to be grabbed when adding a new id and calling the driver core, etc.) I also renamed the function pci_match_device() to pci_match_id() as that's what it really does. Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2005-06-30[PATCH] x86: i8253/i8259A lock cleanupIngo Molnar
Introduce proper declarations for i8253_lock and i8259A_lock. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-06-27[PATCH] pcmcia: more IDs for ide_csDominik Brodowski
Add another ID for ide-cs Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-06-27[PATCH] pcmcia: id_table for ide_cs.cDominik Brodowski
Add pcmcia_device_id table. Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-06-27[PATCH] ide: it8212 backport for Bartlomiej IDEAlan Cox
This lets you throw out the iteraid stuff that has ended up back in due to stupid goings on in the IDE world. Its the same heavily tested code shipped in Fedora/Red Hat products but without the other dependancies on the Bartlomiej IDE layer. Pre-requisite: the ide-disk patch I sent to handle pure LBA devices. Obviously you lose things like hot unplug with the Bartlomiej IDE layer at the moment but that won't matter to most users. The patch does the following - Add IT8211/12 to pci_ids.h - Add Makefile/Kconfig entry - Add it8212 driver No core IDE code is touched by this diff Embedded system testing and the ability to force raid mode off by David Howells Made possible by the ite reference code, documentation and also several clarifications and pieces of assistance provided by ITE themselves Signed-off-by: Alan Cox <alan@redhat.com> Acked-by: Bartlomiej Zolnierkiewicz <B.Zolnierkiewicz@elka.pw.edu.pl> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-06-27[PATCH] ide: fix crashes with hotplug serverworksAlan Cox
You can't install the base kernel on a Stratus box because of the overuse of __init. Affects both IDE layers identically. It isn't the only misuser of __init so more review of other drivers (or fixing ide_register code to know about hotplug v non-hotplug chipsets) would be good. Original issue found by Stratus and their patch was the inspiration for this trivial one. Signed-off-by: Alan Cox <alan@redhat.com> Acked-by: Bartlomiej Zolnierkiewicz <B.Zolnierkiewicz@elka.pw.edu.pl> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-06-27[PATCH] ide: fix the HPT366 driver layerAlan Cox
The highpoint driver is unreadable, buggy and crashes on some chipsets. The -ac one is more readable (but not ideal) and doesn't crash all over the place. Been in Fedora for some time. Backported from the Fedora one to the old Bartlomiej IDE core. No other dependencies. Signed-off-by: Alan Cox <alan@redhat.com> Acked-by: Bartlomiej Zolnierkiewicz <B.Zolnierkiewicz@elka.pw.edu.pl> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-06-27[PATCH] ide: ide-generic, allow for capture of other unsupported devicesAlan Cox
The ide-generic driver gives you DMA at bios tuned speed so can actually run a lot of unsupported devices quite well. It has a pci table so that it doesn't grab disks owned by other drivers but no way to override this. The patch adds an option ide-generic-all which makes the driver grab everything going that is IDE class. The diff is messy because I put the special case as case 0 to make the if conditional and long term maintenance easier. This has been in Fedora for some time. Signed-off-by: Alan Cox <alan@redhat.com> Acked-by: Bartlomiej Zolnierkiewicz <B.Zolnierkiewicz@elka.pw.edu.pl> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-06-27[PATCH] ide: IDE timing violation on resetAlan Cox
Pretty much theoretical for non MMIO thankfully. We _must_ use OUTBSYNC for commands or they may be posted and thus ruin the 400nS required delay. Signed-off-by: Alan Cox <alan@redhat.com> Acked-by: Bartlomiej Zolnierkiewicz <B.Zolnierkiewicz@elka.pw.edu.pl> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-06-27[PATCH] ide: samsung SN-124 works perfectly well with DMAAlan Cox
Been in Red Hat products for ages Signed-off-by: Alan Cox <alan@redhat.com> Acked-by: Bartlomiej Zolnierkiewicz <B.Zolnierkiewicz@elka.pw.edu.pl> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-06-27[PATCH] ide: fix ide-disk inability to handle LBA only devices.Alan Cox
Years old bug, has to be fixed for it8212 to work Signed-off-by: Alan Cox <alan@redhat.com> Acked-by: Bartlomiej Zolnierkiewicz <B.Zolnierkiewicz@elka.pw.edu.pl> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-06-27[PATCH] ppc32: Remove CONFIG_PMAC_PBOOKBenjamin Herrenschmidt
This patch removes CONFIG_PMAC_PBOOK (PowerBook support). This is now split into CONFIG_PMAC_MEDIABAY for the actual hotswap bay that some powerbooks have, CONFIG_PM for power management related code, and just left out of any CONFIG_* option for some generally useful stuff that can be used on non-laptops as well. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-06-23[PATCH] IDE CD reports current speedEric Piel
The current ide-cd driver reports the CDROM speed (as found in /proc/sys/dev/cdrom/info) as the current speed when loading the driver. Changing the speed of the cdrom drive (by "eject -x" for instance) doesn't update the speed reported by the kernel. Updating the info could be valuable for the user as it's the only way to know if the drive accepted the request or discarded it. It could even be used to list all the available speeds of the drive. The attached patch modifies the ide-cd driver so that after every speed change request the new speed is updated. Please note that the actual modification is very little but I had to touch quite a few lines in order to avoid to pre-declare the sub-functions. Signed-off-by: Eric Piel <eric.piel@tremplin-utc.net> Acked-by: Jens Axboe <axboe@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-06-23[PATCH] ide-floppy adjustmentsJan Beulich
Fix a build problem when IDEFLOPPY_DEBUG_BUGS is turned off, and eliminate an access to memory that is no longer allocated (causing systems to fail booting when CONFIG_DEBUG_PAGEALLOC is turned on). Signed-off-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-06-23[PATCH] NUMA aware block device control structure allocationChristoph Lameter
Patch to allocate the control structures for for ide devices on the node of the device itself (for NUMA systems). The patch depends on the Slab API change patch by Manfred and me (in mm) and the pcidev_to_node patch that I posted today. Does some realignment too. Signed-off-by: Justin M. Forbes <jmforbes@linuxtx.org> Signed-off-by: Christoph Lameter <christoph@lameter.com> Signed-off-by: Pravin Shelar <pravin@calsoftinc.com> Signed-off-by: Shobhit Dayal <shobhit@calsoftinc.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-06-21[PATCH] ioc4: CONFIG splitBrent Casavant
The SGI IOC4 I/O controller chip drivers are currently all configured by CONFIG_BLK_DEV_SGIIOC4. This is undesirable as not all IOC4 hardware features are needed by all systems. This patch adds two configuration variables, CONFIG_SGI_IOC4 for core IOC4 driver support (see patch 1/3 in this series for further explanation) and CONFIG_SERIAL_SGI_IOC4 to independently enable serial port support. Signed-off-by: Brent Casavant <bcasavan@sgi.com> Acked-by: Pat Gefre <pfg@sgi.com> Acked-by: Jeremy Higdon <jeremy@sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-06-21[PATCH] ioc4: Core driver rewriteBrent Casavant
This series of patches reworks the configuration and internal structure of the SGI IOC4 I/O controller device drivers. These changes are motivated by several factors: - The IOC4 chip PCI resources are of mixed use between functions (i.e. multiple functions are handled in the same address range, sometimes within the same register), muddling resource ownership and initialization issues. Centralizing this ownership in a core driver is desirable. - The IOC4 chip implements multiple functions (serial, IDE, others not yet implemented in the mainline kernel) but is not a multifunction PCI device. In order to properly handle device addition and removal as well as module insertion and deletion, an intermediary IOC4-specific driver layer is needed to handle these operations cleanly. - All IOC4 drivers are currently enabled by a single CONFIG value. As not all systems need all IOC4 functions, it is desireable to enable these drivers independently. - The current IOC4 core driver will trigger loading of all function-level drivers, as it makes direct calls to them. This situation should be reversed (i.e. function-level drivers cause loading of core driver) in order to maintain a clear and least-surprise driver loading model. - IOC4 hardware design necessitates some driver-level dependency on the PCI bus clock speed. Current code assumes a 66MHz bus, but the speed should be autodetected and appropriate compensation taken. This patch series effects the above changes by a newly and better designed IOC4 core driver with which the function-level drivers can register and deregister themselves upon module insertion/removal. By tracking these modules, device addition/removal is also handled properly. PCI resource management and ownership issues are centralized in this core driver, and IOC4-wide configuration actions such as bus speed detection are also handled in this core driver. This patch: The SGI IOC4 I/O controller chip implements multiple functions, though it is not a multi-function PCI device. Additionally, various PCI resources of the IOC4 are shared by multiple hardware functions, and thus resource ownership by driver is not clearly delineated. Due to the current driver design, all core and subordinate drivers must be loaded, or none, which is undesirable if not all IOC4 hardware features are being used. This patch reorganizes the IOC4 drivers so that the core driver provides a subdriver registration service. Through appropriate callbacks the subdrivers can now handle device addition and removal, as well as module insertion and deletion (though the IOC4 IDE driver requires further work before module deletion will work). The core driver now takes care of allocating PCI resources and data which must be shared between subdrivers, to clearly delineate module ownership of these items. Signed-off-by: Brent Casavant <bcasavan@sgi.com> Acked-by: Pat Gefre <pfg@sgi.com Acked-by: Jeremy Higdon <jeremy@sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>