summaryrefslogtreecommitdiffstats
path: root/drivers/pci/setup-bus.c
Commit message (Collapse)AuthorAgeFilesLines
* PCI: Refactor pbus_size_mem()Gavin Shan2012-09-111-13/+23
| | | | | | | | | The original idea comes from Ram Pai. This patch puts the chunk of code for calculating the minimal alignment of memory window into a separate inline function. Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
* PCI: Align P2P windows using pcibios_window_alignment()Gavin Shan2012-09-111-9/+6
| | | | | | | | | | This patch changes pbus_size_io() and pbus_size_mem() to do window (I/O, memory and prefetchable memory) reassignment based on the minimal alignments for the P2P bridge, which was retrieved by window_alignment(). [bhelgaas: changelog] Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
* PCI: Add weak pcibios_window_alignment() interfaceGavin Shan2012-09-111-0/+32
| | | | | | | | | | | | This patch implements a weak function to return the default I/O or memory window alignment for a P2P bridge. By default, I/O windows are aligned to 4KiB or 1KiB and memory windows are aligned to 4MiB. Some platforms, e.g., powernv, have special alignment requirements and can override pcibios_window_alignment(). [bhelgaas: changelog] Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
* Merge tag 'for-3.6' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pciLinus Torvalds2012-07-241-21/+44
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull PCI changes from Bjorn Helgaas: "Host bridge hotplug: - Add MMCONFIG support for hot-added host bridges (Jiang Liu) Device hotplug: - Move fixups from __init to __devinit (Sebastian Andrzej Siewior) - Call FINAL fixups for hot-added devices, too (Myron Stowe) - Factor out generic code for P2P bridge hot-add (Yinghai Lu) - Remove all functions in a slot, not just those with _EJx (Amos Kong) Dynamic resource management: - Track bus number allocation (struct resource tree per domain) (Yinghai Lu) - Make P2P bridge 1K I/O windows work with resource reassignment (Bjorn Helgaas, Yinghai Lu) - Disable decoding while updating 64-bit BARs (Bjorn Helgaas) Power management: - Add PCIe runtime D3cold support (Huang Ying) Virtualization: - Add VFIO infrastructure (ACS, DMA source ID quirks) (Alex Williamson) - Add quirks for devices with broken INTx masking (Jan Kiszka) Miscellaneous: - Fix some PCI Express capability version issues (Myron Stowe) - Factor out some arch code with a weak, generic, pcibios_setup() (Myron Stowe)" * tag 'for-3.6' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (122 commits) PCI: hotplug: ensure a consistent return value in error case PCI: fix undefined reference to 'pci_fixup_final_inited' PCI: build resource code for M68K architecture PCI: pciehp: remove unused pciehp_get_max_lnk_width(), pciehp_get_cur_lnk_width() PCI: reorder __pci_assign_resource() (no change) PCI: fix truncation of resource size to 32 bits PCI: acpiphp: merge acpiphp_debug and debug PCI: acpiphp: remove unused res_lock sparc/PCI: replace pci_cfg_fake_ranges() with pci_read_bridge_bases() PCI: call final fixups hot-added devices PCI: move final fixups from __init to __devinit x86/PCI: move final fixups from __init to __devinit MIPS/PCI: move final fixups from __init to __devinit PCI: support sizing P2P bridge I/O windows with 1K granularity PCI: reimplement P2P bridge 1K I/O windows (Intel P64H2) PCI: disable MEM decoding while updating 64-bit MEM BARs PCI: leave MEM and IO decoding disabled during 64-bit BAR sizing, too PCI: never discard enable/suspend/resume_early/resume fixups PCI: release temporary reference in __nv_msi_ht_cap_quirk() PCI: restructure 'pci_do_fixups()' ...
| * Merge branch 'pci/bjorn-p2p-bridge-windows' into nextBjorn Helgaas2012-07-101-8/+31
| |\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * pci/bjorn-p2p-bridge-windows: sparc/PCI: replace pci_cfg_fake_ranges() with pci_read_bridge_bases() PCI: support sizing P2P bridge I/O windows with 1K granularity PCI: reimplement P2P bridge 1K I/O windows (Intel P64H2) PCI: allow P2P bridge windows starting at PCI bus address zero Conflicts: drivers/pci/probe.c include/linux/pci.h
| | * PCI: support sizing P2P bridge I/O windows with 1K granularityYinghai Lu2012-07-091-6/+22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Some bridges support I/O windows with 1K alignment, not just the 4K alignment defined by the PCI spec. For example, see the IOBL_ADR register and the EN1K bit in the CNF register in the Intel 82870P2 (P64H2). This patch adds support for sizing the window in 1K increments based on the requirements of downstream devices. [bhelgaas: changelog, comment] Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
| | * PCI: reimplement P2P bridge 1K I/O windows (Intel P64H2)Bjorn Helgaas2012-07-091-2/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 9d265124d051 and 15a260d53f7c added quirks for P2P bridges that support I/O windows that start/end at 1K boundaries, not just the 4K boundaries defined by the PCI spec. For details, see the IOBL_ADR register and the EN1K bit in the CNF register in the Intel 82870P2 (P64H2). These quirks complicate the code that reads P2P bridge windows (pci_read_bridge_io() and pci_cfg_fake_ranges()) because the bridge I/O resource is updated in the HEADER quirk, in pci_read_bridge_io(), in pci_setup_bridge(), and again in the FINAL quirk. This is confusing and makes it impossible to reassign the bridge windows after FINAL quirks are run. This patch adds support for 1K windows in the generic paths, so the HEADER quirk only has to enable this support. The FINAL quirk, which used to undo damage done by pci_setup_bridge(), is no longer needed. This removes "if (!res->start) res->start = ..." from pci_read_bridge_io(); that was part of 9d265124d051 to avoid overwriting the resource filled in by the quirk. Since pci_read_bridge_io() itself now knows about granularity, the quirk no longer updates the resource and this test is no longer needed. Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
| * | Merge branch 'topic/bjorn-trivial' into nextBjorn Helgaas2012-06-221-1/+1
| |\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * topic/bjorn-trivial: PCI: remove useless pcix_set_mmrbc() dev->bus check PCI: acpiphp: check whether _ADR evaluation succeeded PCI: shpchp: remove dead code PCI: fix P2P bridge I/O port window sign extension PCI: fix upstream P2P bridge checks when enabling OBFF and LTR PCI: use __weak consistently PCI: cleanup assign_requested_resources_sorted() kernel-doc warning sparc/PCI: remove unused pcibios_assign_resource() definition
| | * | PCI: cleanup assign_requested_resources_sorted() kernel-doc warningWanpeng Li2012-06-201-1/+1
| | |/ | | | | | | | | | | | | | | | | | | Warning(drivers/pci/setup-bus.c:277): No description found for parameter 'fail_head' Warning(drivers/pci/setup-bus.c:277): Excess function parameter 'failed_list' description in 'assign_requested_resources_sorted' Signed-off-by: Wanpeng Li <liwp.linux@gmail.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
| * | PCI: replace struct pci_bus secondary/subordinate with busn_resYinghai Lu2012-06-131-12/+12
| |/ | | | | | | | | | | | | | | | | Replace the struct pci_bus secondary/subordinate members with the struct resource busn_res. Later we'll build a resource tree of these bus numbers. [bhelgaas: changelog] Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
* | pci: hotplug: Fix typo in pciMasanari Iida2012-07-241-1/+1
|/ | | | | | | Correct spelling typo in drivers/pci/hotplug. Signed-off-by: Masanari Iida <standby24x7@gmail.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
* Merge branch 'pci-next+probe_only+bus2res-fb127cb' of ↵Jesse Barnes2012-02-241-0/+3
|\ | | | | | | git://github.com/bjorn-helgaas/linux into linux-next
| * 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>
| * PCI: make pci_flags always availableBjorn Helgaas2012-02-231-0/+3
| | | | | | | | | | | | | | | | | | | | | | If we move resource assignment functions into the core, we'll still need a way for architectures to prevent reassignment, e.g., the "pci_probe_only" functionality, and we'll need a generic, always available way the core can test for that. The "pci_flags" arrangement used by several architectures seems like a convenient way to do this. Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
* | PCI: add a PCI resource reallocation config optionYinghai Lu2012-02-241-0/+28
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Add a new config option, PCI_REALLOC_ENABLE_AUTO, which will automatically try to re-allocate PCI resources if PCI_IOV support is enabled and the SR-IOV resources are unassigned. Behavior can still be controlled using the pci=realloc= parameter. -v2: According to Jesse, adding one CONFIG option for distribution to disable it or enable it. -v3: update Kconfig text (jbarnes) Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
* | PCI: print out suggestion about using pci=reallocYinghai Lu2012-02-241-0/+3
| | | | | | | | | | | | | | | | | | | | let user know they could try if pci=realloc could help. -v2: update suggestion text. Suggested-by: Jesse Barnes <jbarnes@virtuousgeek.org> Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
* | PCI: prepare pci=realloc for multiple optionsYinghai Lu2012-02-241-7/+27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Let the user could enable and disable with pci=realloc=on or pci=realloc=off Also 1. move variable and functions near the place they are used. 2. change macro to function 3. change related functions and variable to static and _init 4. update parameter description accordingly. This will let us add a config option to control default behavior, and still allow the user to turn off automatic reallocation if it fails on their platform until a permanent solution is found. -v2: still honor pci=realloc, and treat it as pci=realloc=on also use enum instead of ... -v3: update kernel-paramenters.txt according to Jesse. Signed-off-by: Yinghai Lu <yinghai@kernel.org> Acked-by: Jesse Barnes <jbarnes@virtuousgeek.org> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
* | PCI: Retry on IORESOURCE_IO type allocationsYinghai Lu2012-02-241-11/+1
|/ | | | | | | | | | | | | | | | | | | | | | | | | | | | When enabling pci reallocation for a pci bridge, we clear the small size in in bridge and re-assign with requested + optional size for first several tries, but Ram mention could have problem with one case: https://bugzilla.kernel.org/show_bug.cgi?id=15960 After checking the booting log in https://lkml.org/lkml/2010/4/19/44 [regression, bisected] Xonar DX invalid PCI I/O range since 977d17bb174 We should not stop too early for io ports. Apr 19 10:19:38 [kernel] pci 0000:04:00.0: BAR 7: can't assign io (size 0x4000) Apr 19 10:19:38 [kernel] pci 0000:05:01.0: BAR 8: assigned [mem 0x80400000-0x805fffff] Apr 19 10:19:38 [kernel] pci 0000:05:01.0: BAR 7: can't assign io (size 0x2000) Apr 19 10:19:38 [kernel] pci 0000:05:02.0: BAR 7: can't assign io (size 0x1000) Apr 19 10:19:38 [kernel] pci 0000:05:03.0: BAR 7: can't assign io (size 0x1000) Apr 19 10:19:38 [kernel] pci 0000:08:00.0: BAR 7: can't assign io (size 0x1000) Apr 19 10:19:38 [kernel] pci 0000:09:04.0: BAR 0: can't assign io (size 0x100) and clear 00:1c.0 to retry again. This patch removes IORESOUCE_IO checking, and tries one more time. It gives us a chance to get an allocation for the 00:1c.0 io port range because the range from 0x4000 to 0x8000 will be freed and we can use it. Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
* PCI: Skip cardbus assigned resource reset during pci bus rescanYinghai Lu2012-02-231-0/+14
| | | | | | | | | Otherwise when rescan is used for cardbus, assigned resources will get cleared. Signed-off-by: Yinghai Lu <yinghai@kernel.org> Tested-by: Dominik Brodowski <linux@dominikbrodowski.net> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
* PCI: Fix "cardbus bridge resources as optional" size handlingYinghai Lu2012-02-231-28/+37
| | | | | | | | | | | | | | | | | We should not set the requested size to -2; that will confuse the resource list sorting with align when SIZEALIGN is used. Change to STARTALIGN and pass align from start; we are safe to do that just as we do that regular pci bridge. In the long run, we should just treat cardbus like a regular pci bridge. Also fix the case when realloc_head is not passed: we should keep the requested size. Signed-off-by: Yinghai Lu <yinghai@kernel.org> Tested-by: Dominik Brodowski <linux@dominikbrodowski.net> Acked-by: Ram Pai <linuxram@us.ibm.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
* PCI: Disable cardbus bridge MEM1 prefetchable bitYinghai Lu2012-02-231-0/+8
| | | | | | | | | | | | | Some BIOSes enable prefetch on both MEM0 and MEM1. But the cardbus code assumes MEM1 is non-pref... Discussion could be found at: https://lkml.org/lkml/2012/1/12/1 https://bugzilla.kernel.org/show_bug.cgi?id=41622#c23 Signed-off-by: Yinghai Lu <yinghai@kernel.org> Tested-by: Dominik Brodowski <linux@dominikbrodowski.net> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
* PCI: remove add_to_failed_list()Yinghai Lu2012-02-141-10/+4
| | | | | | | Only one user; just use add_to_list instead. Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
* PCI: add debug print out for add_sizeYinghai Lu2012-02-141-6/+18
| | | | | | | For use in debugging resource reallocation. Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
* PCI: make free_list() into a functionYinghai Lu2012-02-141-17/+19
| | | | | | | | After merging struct pci_dev_resource_x and pci_dev_resource, We can use a function instead of macro now. Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
* PCI: Rename dev_res_x to add_res or fail_resYinghai Lu2012-02-141-55/+55
| | | | | | | | | | Linus says don't use dev_res_x because it doesn't communicate anything about usage. Rename them to add_res or fail_res etc according to context. Suggested-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
* PCI: Merge pci_dev_resource_x and pci_dev_resourceYinghai Lu2012-02-141-21/+15
| | | | | | | | | | | | | | | pci_dev_resource_x is a superset of pci_dev_resource and they're just temp structs used during resource reallocation. pci_dev_resource usage is quite limted. So just use pci_dev_resource_x, and rename it as new pci_dev_resource. -v2: According to Linus, Separate free_list change to another patch Suggested-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
* PCI: Replace resource_list with generic listYinghai Lu2012-02-141-192/+182
| | | | | | | | | | | | So we can use helper functions for generic list. This makes the resource re-allocation code much more readable. -v2: Use list_add_tail instead of adding list_insert_before, Pointed out by Linus. Suggested-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
* PCI: Move struct resource_list to setup-bus.cYinghai Lu2012-02-141-0/+6
| | | | | | | | | No user outside of setup-bus.c now. Later patches will convert resource_list to a regular list. Suggested-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
* PCI: Move pdev_sort_resources() to setup-bus.cYinghai Lu2012-02-141-0/+46
| | | | | | | | | This allows us to move the definition of struct resource_list to setup_bus.c and later convert resource_list to a regular list. Suggested-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
* PCI: make re-allocation try harder by reassigning ranges higher in the heirarchyYinghai Lu2012-02-141-18/+28
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | On a system with devices that support SRIOV connected to a pcie switch to pcie root port: +-[0000:80]-+-00.0-[81-8f]-- | +-01.0-[90-9f]-- | +-02.0-[a0-af]----00.0-[a1-a3]--+-02.0-[a2]--+-00.0 Oracle Corporation Device 207a | | \-03.0-[a3]--+-00.0 Oracle Corporation Device 207a | +-02.2-[b0-bf]----00.0-[b1-b3]--+-02.0-[b2]--+-00.0 Oracle Corporation Device 207a | | \-03.0-[b3]--+-00.0 Oracle Corporation Device 207a When the BIOS does not assign resources for SRIOV BARs, kernel pci reallocation only goes up one bridge and then gives up, failing to to get resources for all sSRIOV BARs, even though the range is large enough in the peer root bus. Specifically, only the bridge at the a1:02.0 level has its resources cleared and reallocated. The kernel does not go up to clear the bridge at the 80:02.0 level. To make it go to upper levels, during retry, we need to treat "good to have" resources as "must have". Only on the last try will we treat good to have resources as optional. At that time, parent bridge resources will already have been released so we'll have a chance to get everything assigned with must_have plus good_to_have for all child devices. Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
* PCI: Make pci_rescan_bus handle add_listYinghai Lu2012-02-141-0/+39
| | | | | | | | | | | | This allows us to allocate resources to hotplug bridges during remove/rescan. We need to move the function to setup-bus.c so it can use __pci_bus_size_bridges and __pci_bus_assign_resources directly to take the add_list resource tracking list. Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
* PCI: Use add_list in pcie hotplug path.Yinghai Lu2012-02-141-6/+12
| | | | | | | | | | | We need add size for hot plug path when pluging in hotplug chassis without cards. -v2: change descriptions. make it applicable after "pci: Check bridge resources after resource allocation." Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
* PCI: try to assign required+option size firstYinghai Lu2012-02-141-1/+82
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We found reassignment can not find a range for one resource, even if the total available range is large enough. bridge b1:02.0 will need 2M+3M bridge b1:03.0 will need 2M+3M so bridge b0:00.0 will get assigned: 4M : [f8000000-f83fffff] later is reassigned to 10M : [f8000000-f9ffffff] b1:02.0 is assigned to 2M : [f8000000-f81fffff] b1:03.0 is assigned to 2M : [f8200000-f83fffff] After that b1:03.0 get chance to be reassigned to [f8200000-f86fffff], but b1:02.0 will not have chance to expand, because b1:03.0 is using in middle one. [ 187.911401] pci 0000:b1:02.0: bridge window [mem 0x00100000-0x002fffff] to [bus b2-b2] add_size 300000 [ 187.920764] pci 0000:b1:03.0: bridge window [mem 0x00100000-0x002fffff] to [bus b3-b3] add_size 300000 [ 187.930129] pci 0000:b1:02.0: [mem 0x00100000-0x002fffff] get_res_add_size add_size 300000 [ 187.938500] pci 0000:b1:03.0: [mem 0x00100000-0x002fffff] get_res_add_size add_size 300000 [ 187.946857] pci 0000:b0:00.0: bridge window [mem 0x00100000-0x004fffff] to [bus b1-b3] add_size 600000 [ 187.956206] pci 0000:b0:00.0: BAR 14: assigned [mem 0xf8000000-0xf83fffff] [ 187.963102] pci 0000:b0:00.0: BAR 15: assigned [mem 0xf5000000-0xf51fffff pref] [ 187.970434] pci 0000:b0:00.0: BAR 14: reassigned [mem 0xf8000000-0xf89fffff] [ 187.977497] pci 0000:b1:02.0: BAR 14: assigned [mem 0xf8000000-0xf81fffff] [ 187.984383] pci 0000:b1:02.0: BAR 15: assigned [mem 0xf5000000-0xf50fffff pref] [ 187.991695] pci 0000:b1:03.0: BAR 14: assigned [mem 0xf8200000-0xf83fffff] [ 187.998576] pci 0000:b1:03.0: BAR 15: assigned [mem 0xf5100000-0xf51fffff pref] [ 188.005888] pci 0000:b1:03.0: BAR 14: reassigned [mem 0xf8200000-0xf86fffff] [ 188.012939] pci 0000:b1:02.0: BAR 14: can't assign mem (size 0x200000) [ 188.019471] pci 0000:b1:02.0: failed to add 300000 to res=[mem 0xf8000000-0xf81fffff] [ 188.027326] pci 0000:b2:00.0: reg 184: [mem 0x00000000-0x00003fff 64bit] [ 188.034071] pci 0000:b2:00.0: reg 18c: [mem 0x00000000-0x000fffff 64bit] [ 188.040795] pci 0000:b2:00.0: BAR 2: assigned [mem 0xf8000000-0xf80fffff 64bit] [ 188.048119] pci 0000:b2:00.0: BAR 2: set to [mem 0xf8000000-0xf80fffff 64bit] (PCI address [0xf8000000-0xf80fffff]) [ 188.058550] pci 0000:b2:00.0: BAR 6: assigned [mem 0xf5000000-0xf50fffff pref] [ 188.065802] pci 0000:b2:00.0: BAR 0: assigned [mem 0xf8100000-0xf8103fff 64bit] [ 188.073125] pci 0000:b2:00.0: BAR 0: set to [mem 0xf8100000-0xf8103fff 64bit] (PCI address [0xf8100000-0xf8103fff]) [ 188.083596] pci 0000:b2:00.0: reg 18c: [mem 0x00000000-0x000fffff 64bit] [ 188.090310] pci 0000:b2:00.0: BAR 9: can't assign mem (size 0x300000) [ 188.096773] pci 0000:b2:00.0: reg 184: [mem 0x00000000-0x00003fff 64bit] [ 188.103479] pci 0000:b2:00.0: BAR 7: assigned [mem 0xf8104000-0xf810ffff 64bit] [ 188.110801] pci 0000:b2:00.0: BAR 7: set to [mem 0xf8104000-0xf810ffff 64bit] (PCI address [0xf8104000-0xf810ffff]) [ 188.121256] pci 0000:b1:02.0: PCI bridge to [bus b2-b2] [ 188.126512] pci 0000:b1:02.0: bridge window [mem 0xf8000000-0xf81fffff] [ 188.133328] pci 0000:b1:02.0: bridge window [mem 0xf5000000-0xf50fffff pref] [ 188.140608] pci 0000:b3:00.0: reg 184: [mem 0x00000000-0x00003fff 64bit] [ 188.147341] pci 0000:b3:00.0: reg 18c: [mem 0x00000000-0x000fffff 64bit] [ 188.154076] pci 0000:b3:00.0: BAR 2: assigned [mem 0xf8200000-0xf82fffff 64bit] [ 188.161417] pci 0000:b3:00.0: BAR 2: set to [mem 0xf8200000-0xf82fffff 64bit] (PCI address [0xf8200000-0xf82fffff]) [ 188.171865] pci 0000:b3:00.0: BAR 6: assigned [mem 0xf5100000-0xf51fffff pref] [ 188.179090] pci 0000:b3:00.0: BAR 0: assigned [mem 0xf8300000-0xf8303fff 64bit] [ 188.186431] pci 0000:b3:00.0: BAR 0: set to [mem 0xf8300000-0xf8303fff 64bit] (PCI address [0xf8300000-0xf8303fff]) [ 188.196884] pci 0000:b3:00.0: reg 18c: [mem 0x00000000-0x000fffff 64bit] [ 188.203591] pci 0000:b3:00.0: BAR 9: assigned [mem 0xf8400000-0xf86fffff 64bit] [ 188.210909] pci 0000:b3:00.0: BAR 9: set to [mem 0xf8400000-0xf86fffff 64bit] (PCI address [0xf8400000-0xf86fffff]) [ 188.221379] pci 0000:b3:00.0: reg 184: [mem 0x00000000-0x00003fff 64bit] [ 188.228089] pci 0000:b3:00.0: BAR 7: assigned [mem 0xf8304000-0xf830ffff 64bit] [ 188.235407] pci 0000:b3:00.0: BAR 7: set to [mem 0xf8304000-0xf830ffff 64bit] (PCI address [0xf8304000-0xf830ffff]) [ 188.245843] pci 0000:b1:03.0: PCI bridge to [bus b3-b3] [ 188.251107] pci 0000:b1:03.0: bridge window [mem 0xf8200000-0xf86fffff] [ 188.257922] pci 0000:b1:03.0: bridge window [mem 0xf5100000-0xf51fffff pref] [ 188.265180] pci 0000:b0:00.0: PCI bridge to [bus b1-b3] [ 188.270443] pci 0000:b0:00.0: bridge window [mem 0xf8000000-0xf89fffff] [ 188.277250] pci 0000:b0:00.0: bridge window [mem 0xf5000000-0xf51fffff pref] [ 188.284512] pcieport 0000:80:02.2: PCI bridge to [bus b0-bf] [ 188.290184] pcieport 0000:80:02.2: bridge window [io 0xa000-0xbfff] [ 188.296735] pcieport 0000:80:02.2: bridge window [mem 0xf8000000-0xf8ffffff] [ 188.303963] pcieport 0000:80:02.2: bridge window [mem 0xf5000000-0xf5ffffff 64bit pref] Thus b2:00.0 BAR 9 does not get assigned... root cause: b1:02.0 can not be added more range, because b1:03.0 is just after it; no space between the required ranges. Solution: Try to assign required + optional all together at first, and if that fails, try again with just the required resources. -v2: seperate add_to_list change() to another patch according to Jesse. seperate get_res_add_size() moving to another patch according to Jesse. add !realloc_head->next check if the list is empty to bail early according to Jesse. Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
* PCI: Move get_res_add_size() functionYinghai Lu2012-02-141-14/+15
| | | | | | | | Need to call it from __assign_resources_sorted() later and we'd like to avoid a forward declaraion. Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
* PCI: Make add_to_list() return statusYinghai Lu2012-02-141-2/+4
| | | | | | | | Will be used for resource_list_x duplication when trying requested+optional at first. Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
* PCI : Calculate right add_sizeYinghai Lu2012-02-141-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | During debug of one SRIOV enabled hotplug device, we found found that add_size is not passed properly. The device has devices under two level bridges: +-[0000:80]-+-00.0-[81-8f]-- | +-01.0-[90-9f]-- | +-02.0-[a0-af]----00.0-[a1-a3]--+-02.0-[a2]--+-00.0 Oracle Corporation Device | | \-03.0-[a3]--+-00.0 Oracle Corporation Device Which means later the parent bridge will not try to add a big enough range: [ 557.455077] pci 0000:a0:00.0: BAR 14: assigned [mem 0xf9000000-0xf93fffff] [ 557.461974] pci 0000:a0:00.0: BAR 15: assigned [mem 0xf6000000-0xf61fffff pref] [ 557.469340] pci 0000:a1:02.0: BAR 14: assigned [mem 0xf9000000-0xf91fffff] [ 557.476231] pci 0000:a1:02.0: BAR 15: assigned [mem 0xf6000000-0xf60fffff pref] [ 557.483582] pci 0000:a1:03.0: BAR 14: assigned [mem 0xf9200000-0xf93fffff] [ 557.490468] pci 0000:a1:03.0: BAR 15: assigned [mem 0xf6100000-0xf61fffff pref] [ 557.497833] pci 0000:a1:03.0: BAR 14: can't assign mem (size 0x200000) [ 557.504378] pci 0000:a1:03.0: failed to add optional resources res=[mem 0xf9200000-0xf93fffff] [ 557.513026] pci 0000:a1:02.0: BAR 14: can't assign mem (size 0x200000) [ 557.519578] pci 0000:a1:02.0: failed to add optional resources res=[mem 0xf9000000-0xf91fffff] It turns out we did not calculate size1 properly. static resource_size_t calculate_memsize(resource_size_t size, resource_size_t min_size, resource_size_t size1, resource_size_t old_size, resource_size_t align) { if (size < min_size) size = min_size; if (old_size == 1 ) old_size = 0; if (size < old_size) size = old_size; size = ALIGN(size + size1, align); return size; } We should not pass add_size with min_size in calculate_memsize since that will make add_size not contribute final add_size. So just pass add_size with size1 to calculate_memsize(). With this change, we should have chance to remove extra addon in pci_reassign_resource. Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
* PCI: Make pci_setup_bridge() non-static for use by arch codeBenjamin Herrenschmidt2011-10-141-1/+1
| | | | | | | | | | | | | | The "powernv" platform of the powerpc architecture needs to assign PCI resources using a specific algorithm to fit some HW constraints of the IBM "IODA" architecture (related to the ability to create error handling domains that encompass specific segments of MMIO space). For doing so, it wants to call pci_setup_bridge() from architecture specific resource management in order to configure bridges after all resources have been assigned. So make it non-static. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
* PCI: code and comments cleanupRam Pai2011-08-011-55/+55
| | | | | | | | | a) adjust_resource_sorted() is now called reassign_resource_sorted() b) nice-to-have is now called optional c) add_list is now called realloc_list. Signed-off-by: Ram Pai <linuxram@us.ibm.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
* PCI: make cardbus-bridge resources optionalRam Pai2011-08-011-9/+32
| | | | | | | | | Allocate resources to cardbus bridge only after all other genuine resources requests are satisfied. Dont retry if resource allocation for cardbus-bridges fail. Signed-off-by: Ram Pai <linuxram@us.ibm.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
* PCI: make SRIOV resources optionalYinghai Lu2011-08-011-0/+10
| | | | | | | | | | | | From: Yinghai Lu <yinghai@kernel.org> Allocate resources to SRIOV BARs only after all other required resource-requests are satisfied. Dont retry if resource allocation for SRIOV BARs fail. Signed-off-by: Ram Pai <linuxram@us.ibm.com> Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
* PCI : ability to relocate assigned pci-resourcesRam Pai2011-08-011-10/+17
| | | | | | | | | | | | | | | | | Currently pci-bridges are allocated enough resources to satisfy their immediate requirements. Any additional resource-requests fail if additional free space, contiguous to the one already allocated, is not available. This behavior is not reasonable since sufficient contiguous resources, that can satisfy the request, are available at a different location. This patch provides the ability to expand and relocate a allocated resource. v2: Changelog: Fixed size calculation in pci_reassign_resource() v3: Changelog : Split this patch. The resource.c changes are already upstream. All the pci driver changes are in here. Signed-off-by: Ram Pai <linuxram@us.ibm.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
* PCI: honor child buses add_size in hot plug configurationYinghai Lu2011-08-011-0/+26
| | | | | | | | | | | | | | | | | | | | git commit c8adf9a3e873eddaaec11ac410a99ef6b9656938 "PCI: pre-allocate additional resources to devices only after successful allocation of essential resources." fails to take into consideration the optional-resources needed by children devices while calculating the optional-resource needed by the bridge. This can be a problem on some setup. For example, if a hotplug bridge has 8 children hotplug bridges, the bridge should have enough resources to accomodate the hotplug requirements for each of its children hotplug bridges. Currently this is not the case. This patch fixes the problem. Signed-off-by: Yinghai Lu <yinghai@kernel.org> Reviewed-by: Ram Pai <linuxram@us.ibm.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
* PCI: remove printks about disabled bridge windowsBjorn Helgaas2011-07-221-3/+0
| | | | | | | | I don't think there's enough value in the fact of a bridge window being disabled to justify cluttering the dmesg log with it. Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
* PCI: conditional resource-reallocation through kernel parameter pci=reallocRam Pai2011-07-081-0/+15
| | | | | | | | | | | | | | | Multiple attempts to dynamically reallocate pci resources have unfortunately lead to regressions. Though we continue to fix the regressions and fine tune the dynamic-reallocation behavior, we have not reached a acceptable state yet. This patch provides a interim solution. It disables dynamic reallocation by default, but adds the ability to enable it through pci=realloc kernel command line parameter. Tested-by: Oliver Hartkopp <socketcan@hartkopp.net> Signed-off-by: Ram Pai <linuxram@us.ibm.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
* Merge branch 'linux-next' of ↵Linus Torvalds2011-05-231-8/+117
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6 * 'linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6: (27 commits) PCI: Don't use dmi_name_in_vendors in quirk PCI: remove unused AER functions PCI/sysfs: move bus cpuaffinity to class dev_attrs PCI: add rescan to /sys/.../pci_bus/.../ PCI: update bridge resources to get more big ranges when allocating space (again) KVM: Use pci_store/load_saved_state() around VM device usage PCI: Add interfaces to store and load the device saved state PCI: Track the size of each saved capability data area PCI/e1000e: Add and use pci_disable_link_state_locked() x86/PCI: derive pcibios_last_bus from ACPI MCFG PCI: add latency tolerance reporting enable/disable support PCI: add OBFF enable/disable support PCI: add ID-based ordering enable/disable support PCI hotplug: acpiphp: assume device is in state D0 after powering on a slot. PCI: Set PCIE maxpayload for card during hotplug insertion PCI/ACPI: Report _OSC control mask returned on failure to get control x86/PCI: irq and pci_ids patch for Intel Panther Point DeviceIDs PCI: handle positive error codes PCI: check pci_vpd_pci22_wait() return PCI: Use ICH6_GPIO_EN in ich6_lpc_acpi_gpio ... Fix up trivial conflicts in include/linux/pci_ids.h: commit a6e5e2be4461 moved the intel SMBUS ID definitons to the i2c-i801.c driver.
| * PCI: update bridge resources to get more big ranges when allocating space ↵Yinghai Lu2011-05-211-8/+117
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | (again) With Ram's fixes, this should be safe to do again. So let's give it another try. BIOS separates IO ranges between several IOHs, and on some slots, BIOS assigns resources to a bridge, but stops assigning resources to the device under that bridge, because the device needs a big resource. So: 1. allocate resources and record the failed device resources 2. clear the BIOS assigned resources of the parent bridge of failing device 3. go back and call pci assign unassigned 4. if it still fails, go up the tree, clear more bridges. and try again Now Ram's allocate requested resource already got into mainline. could put this one again. Reviewed-by: Ram Pai <linuxram@us.ibm.com> Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
* | PCI: Clear bridge resource flags if requested size is 0Yinghai Lu2011-05-161-2/+2
|/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | During pci remove/rescan testing found: pci 0000:c0:03.0: PCI bridge to [bus c4-c9] pci 0000:c0:03.0: bridge window [io 0x1000-0x0fff] pci 0000:c0:03.0: bridge window [mem 0xf0000000-0xf00fffff] pci 0000:c0:03.0: bridge window [mem 0xfc180000000-0xfc197ffffff 64bit pref] pci 0000:c0:03.0: device not available (can't reserve [io 0x1000-0x0fff]) pci 0000:c0:03.0: Error enabling bridge (-22), continuing pci 0000:c0:03.0: enabling bus mastering pci 0000:c0:03.0: setting latency timer to 64 pcieport 0000:c0:03.0: device not available (can't reserve [io 0x1000-0x0fff]) pcieport: probe of 0000:c0:03.0 failed with error -22 This bug was caused by commit c8adf9a3e873 ("PCI: pre-allocate additional resources to devices only after successful allocation of essential resources.") After that commit, pci_hotplug_io_size is changed to additional_io_size from minium size. So it will not go through resource_size(res) != 0 path, and will not be reset. The root cause is: pci_bridge_check_ranges will set RESOURCE_IO flag for pci bridge, and later if children do not need IO resource. those bridge resources will not need to be allocated. but flags is still there. that will confuse the the pci_enable_bridges later. related code: static void assign_requested_resources_sorted(struct resource_list *head, struct resource_list_x *fail_head) { struct resource *res; struct resource_list *list; int idx; for (list = head->next; list; list = list->next) { res = list->res; idx = res - &list->dev->resource[0]; if (resource_size(res) && pci_assign_resource(list->dev, idx)) { ... reset_resource(res); } } } At last, We have to clear the flags in pbus_size_mem/io when requested size == 0 and !add_head. becasue this case it will not go through adjust_resources_sorted(). Just make size1 = size0 when !add_head. it will make flags get cleared. At the same time when requested size == 0, add_size != 0, will still have in head and add_list. because we do not clear the flags for it. After this, we will get right result: pci 0000:c0:03.0: PCI bridge to [bus c4-c9] pci 0000:c0:03.0: bridge window [io disabled] pci 0000:c0:03.0: bridge window [mem 0xf0000000-0xf00fffff] pci 0000:c0:03.0: bridge window [mem 0xfc180000000-0xfc197ffffff 64bit pref] pci 0000:c0:03.0: enabling bus mastering pci 0000:c0:03.0: setting latency timer to 64 pcieport 0000:c0:03.0: setting latency timer to 64 pcieport 0000:c0:03.0: irq 160 for MSI/MSI-X pcieport 0000:c0:03.0: Signaling PME through PCIe PME interrupt pci 0000:c4:00.0: Signaling PME through PCIe PME interrupt pcie_pme 0000:c0:03.0:pcie01: service driver pcie_pme loaded aer 0000:c0:03.0:pcie02: service driver aer loaded pciehp 0000:c0:03.0:pcie04: Hotplug Controller: v3: more simple fix. also fix one typo in pbus_size_mem Signed-off-by: Yinghai Lu <yinghai@kernel.org> Reviewed-by: Ram Pai <linuxram@us.ibm.com> Cc: Jesse Barnes <jbarnes@virtuousgeek.org> Cc: Bjorn Helgaas <bhelgaas@google.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* pci: fix PCI bus allocation alignment handlingLinus Torvalds2011-04-111-2/+2
| | | | | | | | | | | | | | | | | | In commit 13583b16592a ("PCI: refactor io size calculation code") Ram had a thinko in the refactorization of the code: the end result used the variable 'align' for the bus alignment, but the original code used 'min_align'. Since then, another use of that 'align' variable got introduced by commit c8adf9a3e873 ("PCI: pre-allocate additional resources to devices only after successful allocation of essential resources.") Fix both of those uses to use 'min_align' as they should. Daniel Hellstrom <daniel@gaisler.com> Acked-by: Ram Pai <linuxram@us.ibm.com> Acked-by: Jesse Barnes <jbarnes@virtuousgeek.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* PCI: pre-allocate additional resources to devices only after successful ↵Ram Pai2011-03-041-47/+184
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | allocation of essential resources. Linux tries to pre-allocate minimal resources to hotplug bridges. This works fine as long as there are enough resources to satisfy all other genuine resource requirements. However if enough resources are not available to satisfy any of these nice-to-have pre-allocations, the resource-allocator reports errors and returns failure. This patch distinguishes between must-have resource from nice-to-have resource. Any failure to allocate nice-to-have resources are ignored. This behavior can be particularly useful to trigger automatic reallocation when the OS discovers genuine allocation-conflicts or genuine unallocated-requests caused by buggy allocation behavior of the native BIOS/uEFI. https://bugzilla.kernel.org/show_bug.cgi?id=15960 captures the movitation behind the patch. This patch is verified to resolve the above bug. changelog v2: o fixed a bug where pci_assign_resource() was called on a resource of zero resource size. changelog v3: addressed Bjorn's comment o "Please don't indent and right-justify the changelog". o removed add_size from struct resource. The additional size is now tracked using a linked list. changelog v4: o moved freeing up of elements in head list from assign_requested_resources_sorted() to __assign_resources_sorted(). o removed a wrong reference to 'add_size' in pbus_size_mem(). o some code optimizations in adjust_resources_sorted() and assign_requested_resources_sorted() changelog v5: o moved freeing up of elements in head list from assign_requested_resources_sorted() to __assign_resources_sorted(). o removed a wrong reference to 'add_size' in pbus_size_mem(). o some code optimizations in adjust_resources_sorted() and assign_requested_resources_sorted() changelog v5: o factored out common code and made them into separate independent patches o added comments in kdoc format o added a BUG_ON in pci_assign_unassigned_resources() to catch for memory leak. Signed-off-by: Ram Pai <linuxram@us.ibm.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
* PCI: introduce reset_resource()Ram Pai2011-03-041-3/+8
| | | | | | | Introduce reset_resource() which factors out resource reset logic. Signed-off-by: Ram Pai <linuxram@us.ibm.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
OpenPOWER on IntegriCloud