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path: root/include/linux/pci.h
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2005-10-28[PATCH] PCI: Block config access during BISTBrian King
Some PCI adapters (eg. ipr scsi adapters) have an exposure today in that they issue BIST to the adapter to reset the card. If, during the time it takes to complete BIST, userspace attempts to access PCI config space, the host bus bridge will master abort the access since the ipr adapter does not respond on the PCI bus for a brief period of time when running BIST. On PPC64 hardware, this master abort results in the host PCI bridge isolating that PCI device from the rest of the system, making the device unusable until Linux is rebooted. This patch is an attempt to close that exposure by introducing some blocking code in the PCI code. When blocked, writes will be humored and reads will return the cached value. Ben Herrenschmidt has also mentioned that he plans to use this in PPC power management. Signed-off-by: Brian King <brking@us.ibm.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> drivers/pci/access.c | 89 ++++++++++++++++++++++++++++++++++++++++++++++++ drivers/pci/pci-sysfs.c | 20 +++++----- drivers/pci/pci.h | 7 +++ drivers/pci/proc.c | 28 +++++++-------- drivers/pci/syscall.c | 14 +++---- include/linux/pci.h | 7 +++ 6 files changed, 134 insertions(+), 31 deletions(-)
2005-09-09Remove "must_check" attributes in PCI-landLinus Torvalds
Don't just irritate all other kernel developers. Fix the users first, then you can re-introduce the must-check infrastructure to avoid new cases creeping in. Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-09-09Merge master.kernel.org:/pub/scm/linux/kernel/git/gregkh/pci-2.6 Linus Torvalds
2005-09-09[PATCH] PCI: Small rearrangement of PCI probing codePaul Mackerras
This patch makes some small rearrangements of the PCI probing code in order to make it possible for arch code to set up the PCI tree without needing to duplicate code from the PCI layer unnecessarily. PPC64 will use this to set up the PCI tree from the Open Firmware device tree, which we need to do on logically-partitioned pSeries systems. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2005-09-09[PATCH] yenta: share code with PCI coreDominik Brodowski
Share code between setup-bus.c and yenta_socket.c: use the write-out code of resources to the bridge also in yenta_socket.c, as it provides useful debug output. In addition, it fixes the bug that the CPU-centric resource view might need to be transferred to the PCI-centric view: setup-bus.c does that, while yenta-socket.c did not. Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-09-09[PATCH] must_check attributes for PCI layer.Dave Jones
Self explanatory really. Some newer gcc's print a warning if a function is used and we don't check its result. We do this for a bunch of things in the kernel already, this extends that to the PCI layer. Based on a patch originally from Arjan van de Ven. Signed-off-by: Dave Jones <davej@redhat.com> Signed-off-by: Arjan van de Ven <arjan@infradead.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2005-09-08[PATCH] PCI/libata INTx cleanupBrett M Russ
Simple cleanup to eliminate X copies of the pci_enable_intx() function in libata. Moved ahci.c's pci_intx() to pci.c and use it throughout libata and msi.c. Signed-off-by: Brett Russ <russb@emc.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2005-09-08[PATCH] PCI: Support PCM PM CAP version 3Daniel Ritz
- support PCI PM CAP version 3 (as defined in PCI PM Interface Spec v1.2) - pci/probe.c sets the PM state initially to 4 which is D3cold. add a PCI_UNKNOWN - minor cleanups Signed-off-by: Daniel Ritz <daniel.ritz@gmx.ch> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2005-09-08[PATCH] PCI: Add pci_walk_bus function to PCI core (nonrecursive)Paul Mackerras
The PCI error recovery infrastructure needs to be able to contact all the drivers affected by a PCI error event, which may mean traversing all the devices under a given PCI-PCI bridge. This patch adds a function to the PCI core that traverses all the PCI devices on a PCI bus and under any PCI-PCI bridges on that bus (and so on), calling a given function for each device. This provides a way for the error recovery code to iterate through all devices that are affected by an error event. This version is not implemented as a recursive function. Instead, when we reach a PCI-PCI bridge, we set the pointers to start doing the devices on the bus under the bridge, and when we reach the end of a bus's devices, we use the bus->self pointer to go back up to the next higher bus and continue doing its devices. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2005-09-08[PATCH] PCI: restore BAR values after D3hot->D0 for devices that need itJohn W. Linville
Some PCI devices (e.g. 3c905B, 3c556B) lose all configuration (including BARs) when transitioning from D3hot->D0. This leaves such a device in an inaccessible state. The patch below causes the BARs to be restored when enabling such a device, so that its driver will be able to access it. The patch also adds pci_restore_bars as a new global symbol, and adds a correpsonding EXPORT_SYMBOL_GPL for that. Some firmware (e.g. Thinkpad T21) leaves devices in D3hot after a (re)boot. Most drivers call pci_enable_device very early, so devices left in D3hot that lose configuration during the D3hot->D0 transition will be inaccessible to their drivers. Drivers could be modified to account for this, but it would be difficult to know which drivers need modification. This is especially true since often many devices are covered by the same driver. It likely would be necessary to replicate code across dozens of drivers. The patch below should trigger only when transitioning from D3hot->D0 (or at boot), and only for devices that have the "no soft reset" bit cleared in the PM control register. I believe it is safe to include this patch as part of the PCI infrastructure. The cleanest implementation of pci_restore_bars was to call pci_update_resource. Unfortunately, that does not currently exist for the sparc64 architecture. The patch below includes a null implemenation of pci_update_resource for sparc64. Some have expressed interest in making general use of the the pci_restore_bars function, so that has been exported to GPL licensed modules. Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2005-09-08[PATCH] PCI: clean up pci.h and split pci register info to separate header file.Greg Kroah-Hartman
This cleans up some of the #ifdef CONFIG_PCI stuff up, and moves the pci register info out to a separate file, where it belongs. Eventually we can stop including this file from within pci.h, but lots of code needs to be audited first. Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2005-09-08[PATCH] PCI: remove CONFIG_PCI_NAMESAdrian Bunk
This patch removes CONFIG_PCI_NAMES. Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2005-09-08[PATCH] PCI: Move PCI fixup data into r/o sectionakpm@osdl.org
Make PCI fixup data const, so it'll end up in a r/o section. This also fixes the conversion into ECOFF which gets broken by too many changes between r/w and r/o sections. Call it a hack but it's a change that's correct by itself. Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2005-08-16[PATCH] PCI: 6700/6702PXH quirkKristen Accardi
On the 6700/6702 PXH part, a MSI may get corrupted if an ACPI hotplug driver and SHPC driver in MSI mode are used together. This patch will prevent MSI from being enabled for the SHPC as part of an early pci quirk, as well as on any pci device which sets the no_msi bit. Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-08-08Revert "[PATCH] PCI: restore BAR values..."Linus Torvalds
Revert commit fec59a711eef002d4ef9eb8de09dd0a26986eb77, which is breaking sparc64 that doesn't have a working pci_update_resource. We'll re-do this after 2.6.13 when we'll do it all properly.
2005-08-04[PATCH] PCI: restore BAR values after D3hot->D0 for devices that need itJohn W. Linville
Some PCI devices (e.g. 3c905B, 3c556B) lose all configuration (including BARs) when transitioning from D3hot->D0. This leaves such a device in an inaccessible state. The patch below causes the BARs to be restored when enabling such a device, so that its driver will be able to access it. The patch also adds pci_restore_bars as a new global symbol, and adds a correpsonding EXPORT_SYMBOL_GPL for that. Some firmware (e.g. Thinkpad T21) leaves devices in D3hot after a (re)boot. Most drivers call pci_enable_device very early, so devices left in D3hot that lose configuration during the D3hot->D0 transition will be inaccessible to their drivers. Drivers could be modified to account for this, but it would be difficult to know which drivers need modification. This is especially true since often many devices are covered by the same driver. It likely would be necessary to replicate code across dozens of drivers. The patch below should trigger only when transitioning from D3hot->D0 (or at boot), and only for devices that have the "no soft reset" bit cleared in the PM control register. I believe it is safe to include this patch as part of the PCI infrastructure. The cleanest implementation of pci_restore_bars was to call pci_update_resource. Unfortunately, that does not currently exist for the sparc64 architecture. The patch below includes a null implemenation of pci_update_resource for sparc64. Some have expressed interest in making general use of the the pci_restore_bars function, so that has been exported to GPL licensed modules. Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-07-29[PATCH] PCI: fix up errors after dma bursting patch and CONFIG_PCI=n -- bug?Kumar Gala
In the patch from: http://www.uwsg.iu.edu/hypermail/linux/kernel/0506.3/0985.html Is the the following line suppose inside the if CONFIG_PCI=n #define pci_dma_burst_advice(pdev, strat, strategy_parameter) do { } while (0) Signed-off-by: Kumar Gala <kumar.gala@freescale.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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>
2005-07-01[PATCH] PCI: Increase the number of PCI bus resourcesrajesh.shah@intel.com
This patch increases the number of resource pointers in the pci_bus structure. This is needed to store >4 resource ranges for host bridges and transparent PCI bridges. With this change, all PCI buses will have more resource pointers, but most PCI buses will only use the first 3 or 4, the remaining being NULL. The PCI core already deals with this correctly. Signed-off-by: Rajesh Shah <rajesh.shah@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2005-06-27[PATCH] PCI: fix up errors after dma bursting patch and CONFIG_PCI=nAndrew Morton
With CONFIG_PCI=n: In file included from include/linux/pci.h:917, from lib/iomap.c:6: include/asm/pci.h:104: warning: `enum pci_dma_burst_strategy' declared inside parameter list include/asm/pci.h:104: warning: its scope is only this definition or declaration, which is probably not what you want. include/asm/pci.h: In function `pci_dma_burst_advice': include/asm/pci.h:106: dereferencing pointer to incomplete type include/asm/pci.h:106: `PCI_DMA_BURST_INFINITY' undeclared (first use in this function) include/asm/pci.h:106: (Each undeclared identifier is reported only once include/asm/pci.h:106: for each function it appears in.) make[1]: *** [lib/iomap.o] Error 1 Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2005-06-27[PATCH] PCI: DMA bursting adviceDavid S. Miller
After seeing, at best, "guesses" as to the following kind of information in several drivers, I decided that we really need a way for platforms to specifically give advice in this area for what works best with their PCI controller implementation. Basically, this new interface gives DMA bursting advice on PCI. There are three forms of the advice: 1) Burst as much as possible, it is not necessary to end bursts on some particular boundary for best performance. 2) Burst on some byte count multiple. A DMA burst to some multiple of number of bytes may be done, but it is important to end the burst on an exact multiple for best performance. The best example of this I am aware of are the PPC64 PCI controllers, where if you end a burst mid-cacheline then chip has to refetch the data and the IOMMU translations which hurts performance a lot. 3) Burst on a single byte count multiple. Bursts shall end exactly on the next multiple boundary for best performance. Sparc64 and Alpha's PCI controllers operate this way. They disconnect any device which tries to burst across a cacheline boundary. Actually, newer sparc64 PCI controllers do not have this behavior. That is why the "pdev" is passed into the interface, so I can add code later to check which PCI controller the system is using and give advice accordingly. Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2005-06-27[PATCH] PCI: fix-pci-mmap-on-ppc-and-ppc64.patchMichael Ellerman
This is an updated version of Ben's fix-pci-mmap-on-ppc-and-ppc64.patch which is in 2.6.12-rc4-mm1. It fixes the patch to work on PPC iSeries, removes some debug printks at Ben's request, and incorporates your fix-pci-mmap-on-ppc-and-ppc64-fix.patch also. Originally from Benjamin Herrenschmidt <benh@kernel.crashing.org> This patch was discussed at length on linux-pci and so far, the last iteration of it didn't raise any comment. It's effect is a nop on architecture that don't define the new pci_resource_to_user() callback anyway. It allows architecture like ppc who put weird things inside of PCI resource structures to convert to some different value for user visible ones. It also fixes mmap'ing of IO space on those archs. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2005-06-27[PATCH] acpi bridge hotadd: ACPI based root bridge hot-addRajesh Shah
When you hot-plug a (root) bridge hierarchy, it may have p2p bridges and devices attached to it that have not been configured by firmware. In this case, we need to configure the devices before starting them. This patch separates device start from device scan so that we can introduce the configuration step in the middle. I kept the existing semantics for pci_scan_bus() since there are a huge number of callers to that function. Also, I have no way of testing the changes I made to the parisc files, so this needs review by those folks. Sorry for the massive cross-post, this touches files in many different places. Signed-off-by: Rajesh Shah <rajesh.shah@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2005-05-03[PATCH] PCI: drivers/pci/pci.c: remove pci_dac_set_dma_maskAdrian Bunk
pci_dac_set_dma_mask is currently completely unused. Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2005-05-03[PATCH] PCI: Add pci shutdown abilityGreg KH
Now pci drivers can know when the system is going down without having to add a reboot notifier event. Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2005-04-16[PATCH] pm_message_t: more fixes in common and i386Pavel Machek
I thought I'm done with fixing u32 vs. pm_message_t ... unfortunately that turned out not to be the case as Russel King pointed out. Here are fixes for Documentation and common code (mainly system devices). Signed-off-by: Pavel Machek <pavel@suse.cz> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-04-16Linux-2.6.12-rc2Linus Torvalds
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!