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* Merge branch 'linux-next' of ↵Linus Torvalds2012-03-23119-1701/+1649
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci Pull PCI changes (including maintainer change) from Jesse Barnes: "This pull has some good cleanups from Bjorn and Yinghai, as well as some more code from Yinghai to better handle resource re-allocation when enabled. There's also a new initcall_debug feature from Arjan which will print out quirk timing information to help identify slow quirks for fixing or refinement (Yinghai sent in a few patches to do just that once the new debug code landed). Beyond that, I'm handing off PCI maintainership to Bjorn Helgaas. He's been a core PCI and Linux contributor for some time now, and has kindly volunteered to take over. I just don't feel I have the time for PCI review and work that it deserves lately (I've taken on some other projects), and haven't been as responsive lately as I'd like, so I approached Bjorn asking if he'd like to manage things. He's going to give it a try, and I'm confident he'll do at least as well as I have in keeping the tree managed, patches flowing, and keeping things stable." Fix up some fairly trivial conflicts due to other cleanups (mips device resource fixup cleanups clashing with list handling cleanup, ppc iseries removal clashing with pci_probe_only cleanup etc) * 'linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci: (112 commits) PCI: Bjorn gets PCI hotplug too PCI: hand PCI maintenance over to Bjorn Helgaas unicore32/PCI: move <asm-generic/pci-bridge.h> include to asm/pci.h sparc/PCI: convert devtree and arch-probed bus addresses to resource powerpc/PCI: allow reallocation on PA Semi powerpc/PCI: convert devtree bus addresses to resource powerpc/PCI: compute I/O space bus-to-resource offset consistently arm/PCI: don't export pci_flags PCI: fix bridge I/O window bus-to-resource conversion x86/PCI: add spinlock held check to 'pcibios_fwaddrmap_lookup()' PCI / PCIe: Introduce command line option to disable ARI PCI: make acpihp use __pci_remove_bus_device instead PCI: export __pci_remove_bus_device PCI: Rename pci_remove_behind_bridge to pci_stop_and_remove_behind_bridge PCI: Rename pci_remove_bus_device to pci_stop_and_remove_bus_device PCI: print out PCI device info along with duration PCI: Move "pci reassigndev resource alignment" out of quirks.c PCI: Use class for quirk for usb host controller fixup PCI: Use class for quirk for ti816x class fixup PCI: Use class for quirk for intel e100 interrupt fixup ...
| * PCI: Bjorn gets PCI hotplug tooJesse Barnes2012-03-211-1/+1
| | | | | | | | | | | | | | Though we may as well just merge this entry with the main PCI one at this point. Unless Alex returns one day at least... Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
| * PCI: hand PCI maintenance over to Bjorn HelgaasJesse Barnes2012-03-201-1/+1
| | | | | | | | | | | | | | | | | | | | I find I have less and less time to manage PCI patches and so I've been looking for a replacement. Bjorn has been substitute maintainer several times, and acts as de-facto maintainer for certain portions anyway. He's kindly agreed to take over in my stead; this makes it official. Acked-by: Bjorn Helgaas <bhelgaas@google.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org.
| * unicore32/PCI: move <asm-generic/pci-bridge.h> include to asm/pci.hBjorn Helgaas2012-03-202-1/+1
| | | | | | | | | | | | | | | | Move this include to be consistent with other architectures. CC: Guan Xuetao <gxt@mprc.pku.edu.cn> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
| * sparc/PCI: convert devtree and arch-probed bus addresses to resourceBjorn Helgaas2012-03-201-35/+25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Normal PCI enumeration via PCI config space uses __pci_read_base(), where the PCI core applies any bus-to-resource offset. But sparc sometimes reads PCI config space itself, and sometimes it gets addresses from the device tree. In ac1edcc579b6, I converted sparc to use the PCI core bus-to-resource conversion, but I missed these sparc-specific paths. I don't have a way to test it, but I think sparc is broken between that commit and this one. This patch replaces the sparc-specific pci_resource_adjust() with the generic pcibios_bus_to_resource() in the following paths: pci_cfg_fake_ranges() (addresses read from PCI config) apb_fake_ranges() (addresses computed based on PCI config) of_scan_pci_bridge() (addresses from OF "ranges" property) N.B.: Resources of non-P2P bridge devices are set in pci_parse_of_addrs() and, as far as I can see, never converted to CPU addresses. I do not understand why these would be treated differently than bridge windows. CC: "David S. Miller" <davem@davemloft.net> CC: sparclinux@vger.kernel.org Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
| * powerpc/PCI: allow reallocation on PA SemiBjorn Helgaas2012-03-201-3/+0
| | | | | | | | | | | | | | | | | | | | | | | | We believe there's no reason to prevent reallocation on PA Semi, so revert to the default of "allow reallocation if necessary." Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> CC: linuxppc-dev@lists.ozlabs.org Tested-by: Olof Johansson <olof@lixom.net> Acked-by: Olof Johansson <olof@lixom.net> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
| * powerpc/PCI: convert devtree bus addresses to resourceBjorn Helgaas2012-03-201-4/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Normal PCI enumeration via PCI config space uses __pci_read_base(), where the PCI core applies any bus-to-resource offset. But powerpc doesn't use that path when enumerating via the device tree. In 6c5705fec63d, I converted powerpc to use the PCI core bus-to-resource conversion, but I missed these powerpc-specific paths. Some powerpc platforms fail to boot ("Cannot allocate resource region," "device not available," etc.) between that commit and this one. This adds the corresponding bus-to-resource conversion in the paths that read BAR values from the OF device tree. CC: Anton Blanchard <anton@samba.org> CC: Benjamin Herrenschmidt <benh@kernel.crashing.org> CC: linuxppc-dev@lists.ozlabs.org Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
| * powerpc/PCI: compute I/O space bus-to-resource offset consistentlyBjorn Helgaas2012-03-204-6/+11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Make sure we compute CPU addresses (resource start/end) the same way both when we set up the I/O aperture (hose->io_resource) and when we use pcibios_bus_to_resource() to convert BAR values into resources. This fixes a build failure ("cast from pointer to integer of different size" in configs where resource_size_t is 64 bits but pointers are 32 bits) I introduced in 6c5705fec63d. Acked-By: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
| * arm/PCI: don't export pci_flagsBjorn Helgaas2012-03-201-1/+0
| | | | | | | | | | | | | | | | | | | | | | There's no need to export pci_flags; it's not exported by any other architecture, and no modules reference it. CC: Rob Herring <rob.herring@calxeda.com> CC: Russell King <linux@arm.linux.org.uk> CC: linux-arm-kernel@lists.infradead.org Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
| * PCI: fix bridge I/O window bus-to-resource conversionBjorn Helgaas2012-03-201-0/+1
| | | | | | | | | | | | | | | | | | | | In 5bfa14ed9f3c, I forgot to initialize res2.flags before calling pcibios_bus_to_resource(), which depends on the resource type to locate the correct aperture. This bug won't hurt x86, which currently never has an offset between bus and CPU addresses, but will affect other architectures. Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
| * x86/PCI: add spinlock held check to 'pcibios_fwaddrmap_lookup()'Myron Stowe2012-03-021-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | 'pcibios_fwaddrmap_lookup()' is used to maintain FW-assigned BIOS BAR values for reinstatement when normal resource assignment attempts fail and must be called with the 'pcibios_fwaddrmap_lock' spinlock held. This patch adds a WARN_ON notification if the spinlock is not currently held by the caller. Signed-off-by: Myron Stowe <myron.stowe@redhat.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
| * PCI / PCIe: Introduce command line option to disable ARIRafael J. Wysocki2012-03-012-1/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There are PCIe devices on the market that report ARI support but then fail to initialize correctly when ARI is actually used. This leads to situations in which kernels 2.6.34 and newer fail to handle systems where the previous kernels worked without any apparent problems. Unfortunately, it is currently unknown how many such devices are there. For this reason, introduce a new kernel command line option, pci=noari, allowing users to disable PCIe ARI altogether if they see problems with PCIe device initialization. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
| * PCI: make acpihp use __pci_remove_bus_device insteadYinghai Lu2012-02-271-1/+1
| | | | | | | | | | | | | | pci_stop_bus_device gets called before in the same loop. Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
| * PCI: export __pci_remove_bus_deviceYinghai Lu2012-02-272-1/+4
| | | | | | | | | | | | | | | | | | | | | | Don't switch to pci_remove_bus_device yet, keep the __ prefix for now (the behavior is still the same: remove without stopping first). This allows other out of tree users or pending patches to get notified from compiler warning. Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
| * PCI: Rename pci_remove_behind_bridge to pci_stop_and_remove_behind_bridgeYinghai Lu2012-02-273-5/+6
| | | | | | | | | | | | | | | | | | | | The old pci_remove_behind_bridge actually do stop and remove. Make the name reflect that to reduce confusion. Suggested-by: Jesse Barnes <jbarnes@virtuousgeek.org> Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
| * PCI: Rename pci_remove_bus_device to pci_stop_and_remove_bus_deviceYinghai Lu2012-02-2722-31/+31
| | | | | | | | | | | | | | | | | | | | | | | | | | The old pci_remove_bus_device actually did stop and remove. Make the name reflect that to reduce confusion. This patch is done by sed scripts and changes back some incorrect __pci_remove_bus_device changes. Suggested-by: Jesse Barnes <jbarnes@virtuousgeek.org> Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
| * PCI: print out PCI device info along with durationYinghai Lu2012-02-241-3/+4
| | | | | | | | | | | | | | | | | | Makes it a little easier to figure out which device may have caused a slow quirk. Signed-off-by: Yinghai Lu <yinghai@kernel.org> Cc: Arjan van de Ven <arjan@infradead.org> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
| * PCI: Move "pci reassigndev resource alignment" out of quirks.cYinghai Lu2012-02-245-71/+66
| | | | | | | | | | | | | | | | This isn't really a quirk; calling it directly from pci_add_device makes more sense. Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
| * PCI: Use class for quirk for usb host controller fixupYinghai Lu2012-02-241-1/+2
| | | | | | | | | | Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
| * PCI: Use class for quirk for ti816x class fixupYinghai Lu2012-02-241-5/+4
| | | | | | | | | | Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
| * PCI: Use class for quirk for intel e100 interrupt fixupYinghai Lu2012-02-241-1/+2
| | | | | | | | | | Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
| * PCI: Use class for quirk for netmos class fixupYinghai Lu2012-02-241-3/+3
| | | | | | | | | | Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
| * PCI: Use class for quirk for legacy ATA NO_D3Yinghai Lu2012-02-241-7/+10
| | | | | | | | | | Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
| * PCI: Use class for quirk for cardbus_legacyYinghai Lu2012-02-241-4/+4
| | | | | | | | | | Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
| * PCI: Use class for quirk for host bridge mmio_always_onYinghai Lu2012-02-241-3/+3
| | | | | | | | | | Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
| * PCI: Use class for quirk for pci_fixup_videoYinghai Lu2012-02-241-4/+2
| | | | | | | | | | Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
| * PCI: Use class quirk for intel fix_transparent_bridgeYinghai Lu2012-02-241-3/+3
| | | | | | | | | | Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
| * PCI: Use class for quirk for via_no_dacYinghai Lu2012-02-241-2/+3
| | | | | | | | | | Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
| * PCI: Add class support in quirk handlingYinghai Lu2012-02-242-16/+59
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Recently added support to allow quirks to report duration also make the boot log very crowded when initcall_debug is specified. One thing we can to do mitigate this is to not call quirks unnecessarily by adding a new quirk declaration macro that takes a class argument. The new macro takes a class value and a class shift value (since it can vary) so that quirks will be limited to certain device classes, greatly reducing the number we call on every PCI device addition. -v2: fix v1 that left over of sparated patch. -v3: according to Jesse, change cls to class, cls_shift, to class_shift. Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
| * Merge branch 'pci-next+probe_only+bus2res-fb127cb' of ↵Jesse Barnes2012-02-2472-1120/+397
| |\ | | | | | | | | | git://github.com/bjorn-helgaas/linux into linux-next
| | * PCI: collapse pcibios_resource_to_busBjorn Helgaas2012-02-2313-53/+15
| | | | | | | | | | | | | | | | | | | | | Everybody uses the generic pcibios_resource_to_bus() supplied by the core now, so remove the ARCH_HAS_GENERIC_PCI_OFFSETS used during conversion. Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
| | * xtensa/PCI: get rid of device resource fixupsBjorn Helgaas2012-02-231-16/+1
| | | | | | | | | | | | | | | | | | | | | | | | Tell the PCI core about host bridge address translation so it can take care of bus-to-resource conversion for us. CC: Chris Zankel <chris@zankel.net> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
| | * sparc/PCI: get rid of device resource fixupsBjorn Helgaas2012-02-234-96/+13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Tell the PCI core about host bridge address translation so it can take care of bus-to-resource conversion for us. N.B. Leon apparently never uses initial BAR values, so it didn't matter that we never fixed up the I/O resources from bus address to CPU addresses. Other sparc uses pci_of_scan_bus(), which sets device resources directly to CPU addresses, not bus addresses, so it didn't need pcibios_fixup_bus() either. But by telling the core about the offsets, we can nuke pcibios_resource_to_bus(). CC: "David S. Miller" <davem@davemloft.net> CC: sparclinux@vger.kernel.org Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
| | * sh/PCI: get rid of device resource fixupsBjorn Helgaas2012-02-232-69/+12
| | | | | | | | | | | | | | | | | | | | | | | | Tell the PCI core about host bridge address translation so it can take care of bus-to-resource conversion for us. CC: Paul Mundt <lethal@linux-sh.org> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
| | * powerpc/PCI: get rid of device resource fixupsBjorn Helgaas2012-02-232-81/+6
| | | | | | | | | | | | | | | | | | | | | | | | Tell the PCI core about host bridge address translation so it can take care of bus-to-resource conversion for us. CC: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
| | * parisc/PCI: get rid of device resource fixupsBjorn Helgaas2012-02-234-135/+13
| | | | | | | | | | | | | | | | | | | | | | | | Tell the PCI core about host bridge address translation so it can take care of bus-to-resource conversion for us. CC: linux-parisc@vger.kernel.org Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
| | * mn10300/PCI: get rid of device resource fixupsBjorn Helgaas2012-02-232-68/+10
| | | | | | | | | | | | | | | | | | | | | | | | Tell the PCI core about host bridge address translation so it can take care of bus-to-resource conversion for us. CC: David Howells <dhowells@redhat.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
| | * mips/PCI: get rid of device resource fixupsBjorn Helgaas2012-02-233-133/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Tell the PCI core about host bridge address translation so it can take care of bus-to-resource conversion for us. Here's the wrinkle on Cobalt: we can't generate normal I/O port addresses on PCI because the GT-64111 doesn't do any address translation, so we have this: CPU I/O port addresses [io 0x0000-0xffffff] PCI bus I/O port addresses [io 0x10000000-0x10ffffff] Legacy-mode IDE controllers start out with the legacy bus addresses, e.g., 0x1f0, assigned by pci_setup_device(). These are outside the range of addresses GT-64111 can generate on PCI, but pcibios_fixup_device_resources() converted them to CPU addresses anyway by adding io_offset. Therefore, we had to pre-adjust them in cobalt_legacy_ide_fixup(). With io_offset = 0xf0000000, we had this: res->start = 0x1f0 initialized in pci_setup_device() res->start = 0x100001f0 -= io_offset in cobalt_legacy_ide_fixup() res->start = 0x1f0 += io_offset in pcibios_fixup_device_resources() The difference after this patch is that the generic pci_bus_to_resource() only adds the offset if the bus address is inside a host bridge window. Since 0x1f0 is not a valid bus address and is not inside any windows, it is unaffected, so we now have this: region->start = 0x1f0 initialized in pci_setup_device() res->start = 0x1f0 no offset by pci_bus_to_resource() That means we can remove both pcibios_fixup_device_resources() and cobalt_legacy_ide_fixup(). I would *rather* set the host bridge offset to zero (which corresponds to what the GT-64111 actually does), and have both CPU and PCI addresses of [io 0x10000000-0x10ffffff]. However, that would require changes to generic code that assumes legacy I/O addresses, such as pic1_io_resource ([io 0x0020-0x00021]), and we'd have to keep a Cobalt IDE fixup. Of course, none of this changes the fact that references to I/O port 0x1f0 actually go to port 0x100001f0, not 0x1f0, on the Cobalt PCI bus. Fortunately the VT82C586 IDE controller only decodes the low 24 address bits, so it does work. CC: Ralf Baechle <ralf@linux-mips.org> CC: Yoichi Yuasa <yuasa@linux-mips.org> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
| | * microblaze/PCI: get rid of device resource fixupsBjorn Helgaas2012-02-232-73/+4
| | | | | | | | | | | | | | | | | | | | | | | | Tell the PCI core about host bridge address translation so it can take care of bus-to-resource conversion for us. CC: Michal Simek <monstr@monstr.eu> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
| | * ia64/PCI: get rid of device resource fixupsBjorn Helgaas2012-02-233-59/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | Tell the PCI core about host bridge address translation so it can take care of bus-to-resource conversion for us. CC: Tony Luck <tony.luck@intel.com> CC: Jack Steiner <steiner@sgi.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
| | * ia64/PCI: SN: convert to pci_scan_root_bus() for correct root bus resourcesBjorn Helgaas2012-02-231-5/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Convert from pci_scan_bus() to pci_scan_root_bus(). Supply the root bus resources from bussoft. When we move the resource adjustment from pcibios_fixup_resources() to the PCI core, it will be important to have the root bus resources correct from the beginning. CC: Tony Luck <tony.luck@intel.com> CC: Jack Steiner <steiner@sgi.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
| | * arm/PCI: get rid of device resource fixupsBjorn Helgaas2012-02-2319-117/+57
| | | | | | | | | | | | | | | | | | | | | | | | Tell the PCI core about host bridge address translation so it can take care of bus-to-resource conversion for us. CC: Russell King <linux@arm.linux.org.uk> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
| | * alpha/PCI: get rid of device resource fixupsBjorn Helgaas2012-02-232-72/+5
| | | | | | | | | | | | | | | | | | | | | | | | Tell the PCI core about host bridge address translation so it can take care of bus-to-resource conversion for us. CC: linux-alpha@vger.kernel.org Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
| | * PCI: add generic pcibios_resource_to_bus()Bjorn Helgaas2012-02-233-23/+21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This replaces the generic versions of pcibios_resource_to_bus() and pcibios_bus_to_resource() in asm-generic/pci.h with versions that use pci_resource_to_bus() and pci_bus_to_resource(). The replacements are equivalent except that they can apply host bridge window offsets when the arch has supplied them by using pci_add_resource_offset(). Each arch can convert to using pci_add_resource_offset() individually by removing its device resource fixups from pcibios_fixup_bus() and supplying ARCH_HAS_GENERIC_PCI_OFFSETS. ARCH_HAS_GENERIC_PCI_OFFSETS can be removed after all have converted. Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
| | * PCI: convert bus addresses to resource when reading BARsBjorn Helgaas2012-02-231-25/+104
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Some PCI host bridges translate CPU addresses to PCI bus addresses. Previously, we initialized pci_dev resources with PCI bus addresses, then converted them to CPU addresses later in arch-specific code (pcibios_fixup_resources()), which leaves a window of time where the pci_dev resources are incorrect. This patch adds support in the core for this address translation. When the arch creates the root bus, it can supply the host bridge address translation information, and the core can use it to set the pci_dev resources correctly from the beginning. This gives us a way to fix the problem that quirks that run between device discovery and pcibios_fixup_resources() fail because they use pci_dev resources that haven't been converted. The reference below is to one such problem that affected ARM and ia64. Note that this patch has no effect until an arch starts using pci_add_resource_offset() with a non-zero offset: before that, all all host bridge windows have a zero offset and pci_bus_to_resource() copies the pci_bus_region directly to the struct resource. Reference: https://lkml.org/lkml/2009/10/12/405 Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
| | * PCI: add struct pci_host_bridge_window with CPU/bus address offsetBjorn Helgaas2012-02-233-20/+51
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Some PCI host bridges apply an address offset, so bus addresses on PCI are different from CPU addresses. This patch adds a way for architectures to tell the PCI core about this offset. For example: LIST_HEAD(resources); pci_add_resource_offset(&resources, host->io_space, host->io_offset); pci_add_resource_offset(&resources, host->mem_space, host->mem_offset); pci_scan_root_bus(parent, bus, ops, sysdata, &resources); Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
| | * PCI: add struct pci_host_bridge and a list of all bridges foundBjorn Helgaas2012-02-232-5/+39
| | | | | | | | | | | | | | | | | | | | | This adds a list of all PCI host bridges we find and a way to look up the host bridge from a pci_dev. Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
| | * PCI: don't publish new root bus until it's fully initializedBjorn Helgaas2012-02-231-4/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When pci_create_root_bus() adds the new struct pci_bus to the global pci_root_buses list, the bus becomes visible to other parts of the kernel, so it should be fully initialized. This patch delays adding the bus to the pci_root_buses list until after all the struct pci_bus initialization is finished. Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
| | * PCI: make pci_flags non-weakBjorn Helgaas2012-02-231-1/+1
| | | | | | | | | | | | | | | | | | | | | No architecture defines its own pci_flags, so the core symbol does not need to be weak. Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
| | * unicore32/PCI: use pci_flags PCI_PROBE_ONLY instead of arm-specific flagBjorn Helgaas2012-02-231-3/+3
| | | | | | | | | | | | | | | CC: Guan Xuetao <gxt@mprc.pku.edu.cn> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
generated by cgit v1.2.3 (git 2.25.1) at 2024-10-21 10:32:44 +0000