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2012-01-23kernel-doc: fix new warnings in pciRandy Dunlap
Fix new kernel-doc warnings: Warning(drivers/pci/pci.c:2811): No description found for parameter 'dev' Warning(drivers/pci/pci.c:2811): Excess function parameter 'pdev' description in 'pci_intx_mask_supported' Warning(drivers/pci/pci.c:2894): No description found for parameter 'dev' Warning(drivers/pci/pci.c:2894): Excess function parameter 'pdev' description in 'pci_check_and_mask_intx' Warning(drivers/pci/pci.c:2908): No description found for parameter 'dev' Warning(drivers/pci/pci.c:2908): Excess function parameter 'pdev' description in 'pci_check_and_unmask_intx' Signed-off-by: Randy Dunlap <rdunlap@xenotime.net> Cc: Jesse Barnes <jbarnes@virtuousgeek.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-01-14Merge branch 'for-linus' of git://selinuxproject.org/~jmorris/linux-securityLinus Torvalds
* 'for-linus' of git://selinuxproject.org/~jmorris/linux-security: capabilities: remove __cap_full_set definition security: remove the security_netlink_recv hook as it is equivalent to capable() ptrace: do not audit capability check when outputing /proc/pid/stat capabilities: remove task_ns_* functions capabitlies: ns_capable can use the cap helpers rather than lsm call capabilities: style only - move capable below ns_capable capabilites: introduce new has_ns_capabilities_noaudit capabilities: call has_ns_capability from has_capability capabilities: remove all _real_ interfaces capabilities: introduce security_capable_noaudit capabilities: reverse arguments to security_capable capabilities: remove the task from capable LSM hook entirely selinux: sparse fix: fix several warnings in the security server cod selinux: sparse fix: fix warnings in netlink code selinux: sparse fix: eliminate warnings for selinuxfs selinux: sparse fix: declare selinux_disable() in security.h selinux: sparse fix: move selinux_complete_init selinux: sparse fix: make selinux_secmark_refcount static SELinux: Fix RCU deref check warning in sel_netport_insert() Manually fix up a semantic mis-merge wrt security_netlink_recv(): - the interface was removed in commit fd7784615248 ("security: remove the security_netlink_recv hook as it is equivalent to capable()") - a new user of it appeared in commit a38f7907b926 ("crypto: Add userspace configuration API") causing no automatic merge conflict, but Eric Paris pointed out the issue.
2012-01-13module_param: make bool parameters really bool (drivers & misc)Rusty Russell
module_param(bool) used to counter-intuitively take an int. In fddd5201 (mid-2009) we allowed bool or int/unsigned int using a messy trick. It's time to remove the int/unsigned int option. For this version it'll simply give a warning, but it'll break next kernel version. Acked-by: Mauro Carvalho Chehab <mchehab@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2012-01-11Merge branch 'linux-next' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci * 'linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci: (80 commits) x86/PCI: Expand the x86_msi_ops to have a restore MSIs. PCI: Increase resource array mask bit size in pcim_iomap_regions() PCI: DEVICE_COUNT_RESOURCE should be equal to PCI_NUM_RESOURCES PCI: pci_ids: add device ids for STA2X11 device (aka ConneXT) PNP: work around Dell 1536/1546 BIOS MMCONFIG bug that breaks USB x86/PCI: amd: factor out MMCONFIG discovery PCI: Enable ATS at the device state restore PCI: msi: fix imbalanced refcount of msi irq sysfs objects PCI: kconfig: English typo in pci/pcie/Kconfig PCI/PM/Runtime: make PCI traces quieter PCI: remove pci_create_bus() xtensa/PCI: convert to pci_scan_root_bus() for correct root bus resources x86/PCI: convert to pci_create_root_bus() and pci_scan_root_bus() x86/PCI: use pci_scan_bus() instead of pci_scan_bus_parented() x86/PCI: read Broadcom CNB20LE host bridge info before PCI scan sparc32, leon/PCI: convert to pci_scan_root_bus() for correct root bus resources sparc/PCI: convert to pci_create_root_bus() sh/PCI: convert to pci_scan_root_bus() for correct root bus resources powerpc/PCI: convert to pci_create_root_bus() powerpc/PCI: split PHB part out of pcibios_map_io_space() ... Fix up conflicts in drivers/pci/msi.c and include/linux/pci_regs.h due to the same patches being applied in other branches.
2012-01-10Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommuLinus Torvalds
* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu: (53 commits) iommu/amd: Set IOTLB invalidation timeout iommu/amd: Init stats for iommu=pt iommu/amd: Remove unnecessary cache flushes in amd_iommu_resume iommu/amd: Add invalidate-context call-back iommu/amd: Add amd_iommu_device_info() function iommu/amd: Adapt IOMMU driver to PCI register name changes iommu/amd: Add invalid_ppr callback iommu/amd: Implement notifiers for IOMMUv2 iommu/amd: Implement IO page-fault handler iommu/amd: Add routines to bind/unbind a pasid iommu/amd: Implement device aquisition code for IOMMUv2 iommu/amd: Add driver stub for AMD IOMMUv2 support iommu/amd: Add stat counter for IOMMUv2 events iommu/amd: Add device errata handling iommu/amd: Add function to get IOMMUv2 domain for pdev iommu/amd: Implement function to send PPR completions iommu/amd: Implement functions to manage GCR3 table iommu/amd: Implement IOMMUv2 TLB flushing routines iommu/amd: Add support for IOMMUv2 domain mode iommu/amd: Add amd_iommu_domain_direct_map function ...
2012-01-10Merge branch 'stable/for-linus-3.3' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen * 'stable/for-linus-3.3' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen: (37 commits) xen/pciback: Expand the warning message to include domain id. xen/pciback: Fix "device has been assigned to X domain!" warning xen/pciback: Move the PCI_DEV_FLAGS_ASSIGNED ops to the "[un|]bind" xen/xenbus: don't reimplement kvasprintf via a fixed size buffer xenbus: maximum buffer size is XENSTORE_PAYLOAD_MAX xen/xenbus: Reject replies with payload > XENSTORE_PAYLOAD_MAX. Xen: consolidate and simplify struct xenbus_driver instantiation xen-gntalloc: introduce missing kfree xen/xenbus: Fix compile error - missing header for xen_initial_domain() xen/netback: Enable netback on HVM guests xen/grant-table: Support mappings required by blkback xenbus: Use grant-table wrapper functions xenbus: Support HVM backends xen/xenbus-frontend: Fix compile error with randconfig xen/xenbus-frontend: Make error message more clear xen/privcmd: Remove unused support for arch specific privcmp mmap xen: Add xenbus_backend device xen: Add xenbus device driver xen: Add privcmd device driver xen/gntalloc: fix reference counts on multi-page mappings ...
2012-01-09Merge branches 'iommu/fixes', 'arm/omap' and 'x86/amd' into nextJoerg Roedel
Conflicts: drivers/pci/hotplug/acpiphp_glue.c
2012-01-08Merge branch 'for-linus2' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs * 'for-linus2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (165 commits) reiserfs: Properly display mount options in /proc/mounts vfs: prevent remount read-only if pending removes vfs: count unlinked inodes vfs: protect remounting superblock read-only vfs: keep list of mounts for each superblock vfs: switch ->show_options() to struct dentry * vfs: switch ->show_path() to struct dentry * vfs: switch ->show_devname() to struct dentry * vfs: switch ->show_stats to struct dentry * switch security_path_chmod() to struct path * vfs: prefer ->dentry->d_sb to ->mnt->mnt_sb vfs: trim includes a bit switch mnt_namespace ->root to struct mount vfs: take /proc/*/mounts and friends to fs/proc_namespace.c vfs: opencode mntget() mnt_set_mountpoint() vfs: spread struct mount - remaining argument of next_mnt() vfs: move fsnotify junk to struct mount vfs: move mnt_devname vfs: move mnt_list to struct mount vfs: switch pnode.h macros to struct mount * ...
2012-01-06x86/PCI: Expand the x86_msi_ops to have a restore MSIs.Konrad Rzeszutek Wilk
The MSI restore function will become a function pointer in an x86_msi_ops struct. It defaults to the implementation in the io_apic.c and msi.c. We piggyback on the indirection mechanism introduced by "x86: Introduce x86_msi_ops". Cc: x86@kernel.org Cc: Thomas Gleixner <tglx@linutronix.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: linux-pci@vger.kernel.org Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2012-01-06Merge branch 'x86-apic-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip * 'x86-apic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86: Skip cpus with apic-ids >= 255 in !x2apic_mode x86, x2apic: Allow "nox2apic" to disable x2apic mode setup by BIOS x86, x2apic: Fallback to xapic when BIOS doesn't setup interrupt-remapping x86, acpi: Skip acpi x2apic entries if the x2apic feature is not present x86, apic: Add probe() for apic_flat x86: Simplify code by removing a !SMP #ifdefs from 'struct cpuinfo_x86' x86: Convert per-cpu counter icr_read_retry_count into a member of irq_stat x86: Add per-cpu stat counter for APIC ICR read tries pci, x86/io-apic: Allow PCI_IOAPIC to be user configurable on x86 x86: Fix the !CONFIG_NUMA build of the new CPU ID fixup code support x86: Add NumaChip support x86: Add x86_init platform override to fix up NUMA core numbering x86: Make flat_init_apic_ldr() available
2012-01-06PCI: Enable ATS at the device state restoreHao, Xudong
During S3 or S4 resume or PCI reset, ATS regs aren't restored correctly. This patch enables ATS at the device state restore if PCI device has ATS capability. Signed-off-by: Xudong Hao <xudong.hao@intel.com> Signed-off-by: Xiantao Zhang <xiantao.zhang@intel.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2012-01-06PCI: msi: fix imbalanced refcount of msi irq sysfs objectsNeil Horman
This warning was recently reported to me: ------------[ cut here ]------------ WARNING: at lib/kobject.c:595 kobject_put+0x50/0x60() Hardware name: VMware Virtual Platform kobject: '(null)' (ffff880027b0df40): is not initialized, yet kobject_put() is being called. Modules linked in: vmxnet3(+) vmw_balloon i2c_piix4 i2c_core shpchp raid10 vmw_pvscsi Pid: 630, comm: modprobe Tainted: G W 3.1.6-1.fc16.x86_64 #1 Call Trace: [<ffffffff8106b73f>] warn_slowpath_common+0x7f/0xc0 [<ffffffff8106b836>] warn_slowpath_fmt+0x46/0x50 [<ffffffff810da293>] ? free_desc+0x63/0x70 [<ffffffff812a9aa0>] kobject_put+0x50/0x60 [<ffffffff812e4c25>] free_msi_irqs+0xd5/0x120 [<ffffffff812e524c>] pci_enable_msi_block+0x24c/0x2c0 [<ffffffffa017c273>] vmxnet3_alloc_intr_resources+0x173/0x240 [vmxnet3] [<ffffffffa0182e94>] vmxnet3_probe_device+0x615/0x834 [vmxnet3] [<ffffffff812d141c>] local_pci_probe+0x5c/0xd0 [<ffffffff812d2cb9>] pci_device_probe+0x109/0x130 [<ffffffff8138ba2c>] driver_probe_device+0x9c/0x2b0 [<ffffffff8138bceb>] __driver_attach+0xab/0xb0 [<ffffffff8138bc40>] ? driver_probe_device+0x2b0/0x2b0 [<ffffffff8138bc40>] ? driver_probe_device+0x2b0/0x2b0 [<ffffffff8138a8ac>] bus_for_each_dev+0x5c/0x90 [<ffffffff8138b63e>] driver_attach+0x1e/0x20 [<ffffffff8138b240>] bus_add_driver+0x1b0/0x2a0 [<ffffffffa0188000>] ? 0xffffffffa0187fff [<ffffffff8138c246>] driver_register+0x76/0x140 [<ffffffff815ca414>] ? printk+0x51/0x53 [<ffffffffa0188000>] ? 0xffffffffa0187fff [<ffffffff812d2996>] __pci_register_driver+0x56/0xd0 [<ffffffffa018803a>] vmxnet3_init_module+0x3a/0x3c [vmxnet3] [<ffffffff81002042>] do_one_initcall+0x42/0x180 [<ffffffff810aad71>] sys_init_module+0x91/0x200 [<ffffffff815dccc2>] system_call_fastpath+0x16/0x1b ---[ end trace 44593438a59a9558 ]--- Using INTx interrupt, #Rx queues: 1. It occurs when populate_msi_sysfs fails, which in turn causes free_msi_irqs to be called. Because populate_msi_sysfs fails, we never registered any of the msi irq sysfs objects, but free_msi_irqs still calls kobject_del and kobject_put on each of them, which gets flagged in the above stack trace. The fix is pretty straightforward. We can key of the parent pointer in the kobject. It is only set if the kobject_init_and_add succededs in populate_msi_sysfs. If anything fails there, each kobject has its parent reset to NULL Signed-off-by: Neil Horman <nhorman@tuxdriver.com> CC: Bjorn Helgaas <bhelgaas@google.com> CC: Greg Kroah-Hartman <gregkh@suse.de> CC: linux-pci@vger.kernel.org Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2012-01-06PCI: kconfig: English typo in pci/pcie/KconfigP. Christeas
Just fix this help text. Signed-off-by: P. Christeas <xrg@linux.gr> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2012-01-06PCI/PM/Runtime: make PCI traces quieterVincent Palatin
When the runtime PM is activated on PCI, if a device switches state frequently (e.g. an EHCI controller with autosuspending USB devices connected) the PCI configuration traces might be very verbose in the kernel log. Let's guard those traces with DEBUG condition. Acked-by: "Rafael J. Wysocki" <rjw@sisk.pl> Signed-off-by: Vincent Palatin <vpalatin@chromium.org> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2012-01-06PCI: remove pci_create_bus()Bjorn Helgaas
All users of pci_create_bus() have been converted to pci_create_root_bus(), so remove it. Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2012-01-06PCI: deprecate pci_scan_bus_parented()Bjorn Helgaas
Users of pci_scan_bus_parented() should be converted to use either pci_scan_root_bus() (preferred, but also calls pci_bus_add_devices) or pci_create_root_bus() pci_scan_child_bus() Since pci_scan_bus_parented(), I'm marking it deprecated now and will actually remove it later. Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2012-01-06PCI: convert pci_scan_bus_parented() to use pci_create_root_bus()Bjorn Helgaas
This converts pci_scan_bus_parented() to use pci_create_root_bus() instead of pci_create_bus(). The new bus still has the default (incorrect) resources, so this patch doesn't help fix that problem, but it does remove one more use of pci_create_bus(). Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2012-01-06PCI: convert pci_scan_bus() to use pci_create_root_bus()Bjorn Helgaas
I plan to deprecate pci_scan_bus_parented(), so use pci_create_root_bus() directly instead. pci_scan_bus() itself will be removed as soon as all callers are gone, so this is just an interim step. v2: export pci_scan_bus Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2012-01-06PCI: add pci_scan_root_bus() that accepts resource listBjorn Helgaas
"Early" and "header" quirks often use incorrect bus resources because they see the default resources assigned by pci_create_bus(), before the architecture fixes them up (typically in pcibios_fixup_bus()). Regions reserved by these quirks end up with the wrong parents. Here's the standard path for scanning a PCI root bus: pci_scan_bus or pci_scan_bus_parented pci_create_bus <-- A create with default resources pci_scan_child_bus pci_scan_slot pci_scan_single_device pci_scan_device pci_setup_device pci_fixup_device(early) <-- B pci_device_add pci_fixup_device(header) <-- C pcibios_fixup_bus <-- D fill in correct resources Early and header quirks at B and C use the default (incorrect) root bus resources rather than those filled in at D. This patch adds a new pci_scan_root_bus() function that sets the bus resources correctly from a supplied list of resources. I intend to remove pci_scan_bus() and pci_scan_bus_parented() after fixing all callers. Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2012-01-06PCI: add pci_create_root_bus() that accepts resource listBjorn Helgaas
pci_create_bus() assigns ioport_resource and iomem_resource as the default bus resources, i.e., the entire address space. Architectures fix these later, typically in pcibios_fixup_bus() or after pci_scan_bus_parented() returns, but code that runs in the interim sees incorrect resource information. This patch adds a new pci_create_root_bus() that sets the bus resources correctly from a supplied list of resources. I intend to remove pci_create_bus() after changing all callers. Based on original patch by Deng-Cheng Zhu. Reference: http://www.spinics.net/lists/mips/msg41654.html Reference: https://lkml.org/lkml/2011/8/26/88 Signed-off-by: Deng-Cheng Zhu <dczhu@mips.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2012-01-06PCI: show host bridges and root bus resourcesBjorn Helgaas
Show the bus number and resources for every root bus we create. This will become more interesting when we supply the correct resources instead of using the defaults (ioport_resource and iomem_resource). Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2012-01-06PCI: add helpers for building PCI bus resource listsBjorn Helgaas
We'd like to supply a list of resources when we create a new PCI bus, e.g., the root bus under a PCI host bridge. These are helpers for constructing that list. These are exported because the plan is to replace this exported interface: pci_scan_bus_parented() with this one: pci_add_resource(resources, ...) pci_scan_root_bus(..., resources) Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2012-01-06PCI: delay configuration of SRIOV capabilityRam Pai
The SRIOV capability, namely page size and total_vfs of a device are configured during enumeration phase of the device. This can potentially interfere with the PCI operations of the platform, if the IOV capability of the device is not enabled. The following patch postpones the configuration of the IOV capability of the device to a later point, when the IOV capability is explicitly enabled by the device driver. The patch is tested on x86 and power platform. Tested-by: Donald Dutile <ddutile@redhat.com> Signed-off-by: Ram Pai <linuxram@us.ibm.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2012-01-06PCI: Only call pci_stop_bus_device() one time for child devices at removeYinghai Lu
During debugging pcie hotplug with SRIOV with pcie switch, I found pci_stop_bus_device() is called several times for some child devices. So change original pci_remove_bus_device() to __pci_remove_bus_device(), and make it only do remove work, and add a new pci_remove_bus_device that calls pci_stop_bus_device() one time, and then call __pci_remove_bus_device(). Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2012-01-06PCI: latency timer doesn't apply to PCIeMyron Stowe
The latency timer is read-only and hardwired to zero for all PCIe devices, both Type 0 and Type 1, so don't bother trying to update it and cluttering the dmesg log with meaningless "setting latency timer to 64" messages. Signed-off-by: Myron Stowe <myron.stowe@redhat.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2012-01-06PCI: Pull PCI 'latency timer' setup up into the coreMyron Stowe
The 'latency timer' of PCI devices, both Type 0 and Type 1, is setup in architecture-specific code [see: 'pcibios_set_master()']. There are two approaches being taken by all the architectures - check if the 'latency timer' is currently set between 16 and 255 and if not bring it within bounds, or, do nothing (and then there is the gratuitously different PA-RISC implementation). There is nothing architecture-specific about PCI's 'latency timer' so this patch pulls its setup functionality up into the PCI core by creating a generic 'pcibios_set_master()' function using the '__weak' attribute which can be used by all architectures as a default which, if necessary, can then be over-ridden by architecture-specific code. No functional change. Signed-off-by: Myron Stowe <myron.stowe@redhat.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2012-01-06PCI: Introduce INTx check & mask APIJan Kiszka
These new PCI services allow to probe for 2.3-compliant INTx masking support and then use the feature from PCI interrupt handlers. The services are properly synchronized with concurrent config space access via sysfs or on device reset. This enables generic PCI device drivers like uio_pci_generic or KVM's device assignment to implement the necessary kernel-side IRQ handling without any knowledge about device-specific interrupt status and control registers. Acked-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2012-01-06PCI: Rework config space blocking servicesJan Kiszka
pci_block_user_cfg_access was designed for the use case that a single context, the IPR driver, temporarily delays user space accesses to the config space via sysfs. This assumption became invalid by the time pci_dev_reset was added as locking instance. Today, if you run two loops in parallel that reset the same device via sysfs, you end up with a kernel BUG as pci_block_user_cfg_access detect the broken assumption. This reworks the pci_block_user_cfg_access to a sleeping service pci_cfg_access_lock and an atomic-compatible variant called pci_cfg_access_trylock. The former not only blocks user space access as before but also waits if access was already locked. The latter service just returns false in this case, allowing the caller to resolve the conflict instead of raising a BUG. Adaptions of the ipr driver were originally written by Brian King. Acked-by: Brian King <brking@linux.vnet.ibm.com> Acked-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2012-01-06PCI: fix a brace coding style issue in probe.cZac Storer
Fixed a brace coding style issue. Signed-off-by: Zac Storer <zac.3.14159@gmail.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2012-01-06PCI: pci_has_legacy_pm_support add driver and device to WARNDavid Fries
Include the driver name and device in warning when a pci driver supports both legacy pm and new framework as just the stack trace gives no way to identify the driver. Signed-off-by: David Fries <David@Fries.net> Acked-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2012-01-06PCI: msi: Disable msi interrupts when we initialize a pci deviceEric W. Biederman
I traced a nasty kexec on panic boot failure to the fact that we had screaming msi interrupts and we were not disabling the msi messages at kernel startup. The booting kernel had not enabled those interupts so was not prepared to handle them. I can see no reason why we would ever want to leave the msi interrupts enabled at boot if something else has enabled those interrupts. The pci spec specifies that msi interrupts should be off by default. Drivers are expected to enable the msi interrupts if they want to use them. Our interrupt handling code reprograms the interrupt handlers at boot and will not be be able to do anything useful with an unexpected interrupt. This patch applies cleanly all of the way back to 2.6.32 where I noticed the problem. Cc: stable@kernel.org Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2012-01-06PCI/ACPI/PM: Avoid resuming devices that don't signal PMERafael J. Wysocki
Modify pci_acpi_wake_dev() to avoid resuming PME-capable devices whose PME Status bits are not set, which may happen currently if several devices are associated with the same wakeup GPE and all of them are notified whenever at least one of them signals PME. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2012-01-06PCI: pciehp: Handle push button event asynchronouslyKenji Kaneshige
Use non-ordered workqueue for attention button events. Attention button events on each slot can be handled asynchronously. So we should use non-ordered workqueue. This patch also removes ordered workqueue in pciehp as a result. Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2012-01-06PCI: pciehp: Fix wrong workqueue cleanupKenji Kaneshige
Fix improper workqueue cleanup. In the current pciehp, pcied_cleanup() calls destroy_workqueue() before calling pcie_port_service_unregister(). This causes kernel oops because flush_workqueue() is called in the pcie_port_service_unregister() code path after the workqueue was destroyed. So pcied_cleanup() must call pcie_port_service_unregister() first before calling destroy_workqueue(). Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2012-01-06PCI: Rework ASPM disable codeMatthew Garrett
Right now we forcibly clear ASPM state on all devices if the BIOS indicates that the feature isn't supported. Based on the Microsoft presentation "PCI Express In Depth for Windows Vista and Beyond", I'm starting to think that this may be an error. The implication is that unless the platform grants full control via _OSC, Windows will not touch any PCIe features - including ASPM. In that case clearing ASPM state would be an error unless the platform has granted us that control. This patch reworks the ASPM disabling code such that the actual clearing of state is triggered by a successful handoff of PCIe control to the OS. The general ASPM code undergoes some changes in order to ensure that the ability to clear the bits isn't overridden by ASPM having already been disabled. Further, this theoretically now allows for situations where only a subset of PCIe roots hand over control, leaving the others in the BIOS state. It's difficult to know for sure that this is the right thing to do - there's zero public documentation on the interaction between all of these components. But enough vendors enable ASPM on platforms and then set this bit that it seems likely that they're expecting the OS to leave them alone. Measured to save around 5W on an idle Thinkpad X220. Signed-off-by: Matthew Garrett <mjg@redhat.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2012-01-06PCI: Fix PRI and PASID consistencyAlex Williamson
These are extended capabilities, rename and move to proper group for consistency. Signed-off-by: Alex Williamson <alex.williamson@redhat.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2012-01-06PCI/sysfs: add per pci device msi[x] irq listing (v5)Neil Horman
This patch adds a per-pci-device subdirectory in sysfs called: /sys/bus/pci/devices/<device>/msi_irqs This sub-directory exports the set of msi vectors allocated by a given pci device, by creating a numbered sub-directory for each vector beneath msi_irqs. For each vector various attributes can be exported. Currently the only attribute is called mode, which tracks the operational mode of that vector (msi vs. msix) Acked-by: Greg Kroah-Hartman <gregkh@suse.de> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2012-01-05capabilities: reverse arguments to security_capableEric Paris
security_capable takes ns, cred, cap. But the LSM capable() hook takes cred, ns, cap. The capability helper functions also take cred, ns, cap. Rather than flip argument order just to flip it back, leave them alone. Heck, this should be a little faster since argument will be in the right place! Signed-off-by: Eric Paris <eparis@redhat.com>
2012-01-04Xen: consolidate and simplify struct xenbus_driver instantiationJan Beulich
The 'name', 'owner', and 'mod_name' members are redundant with the identically named fields in the 'driver' sub-structure. Rather than switching each instance to specify these fields explicitly, introduce a macro to simplify this. Eliminate further redundancy by allowing the drvname argument to DEFINE_XENBUS_DRIVER() to be blank (in which case the first entry from the ID table will be used for .driver.name). Also eliminate the questionable xenbus_register_{back,front}end() wrappers - their sole remaining purpose was the checking of the 'owner' field, proper setting of which shouldn't be an issue anymore when the macro gets used. v2: Restore DRV_NAME for the driver name in xen-pciback. Signed-off-by: Jan Beulich <jbeulich@suse.com> Cc: Jens Axboe <axboe@kernel.dk> Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com> Cc: Florian Tobias Schandinat <FlorianSchandinat@gmx.de> Cc: Ian Campbell <ian.campbell@citrix.com> Cc: David S. Miller <davem@davemloft.net> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
2012-01-03switch ->is_visible() to returning umode_tAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-12-18pci: Fix hotplug of Express Module with pci bridgesYinghai Lu
I noticed that hotplug of one setup does not work with recent change in pci tree. After checking the bridge conf setup, I noticed that the bridges get assigned but do not get enabled. The reason is the following commit, while simply ignores bridge resources when enabling a pci device: | commit bbef98ab0f019f1b0c25c1acdf1683c68933d41b | Author: Ram Pai <linuxram@us.ibm.com> | Date: Sun Nov 6 10:33:10 2011 +0800 | | PCI: defer enablement of SRIOV BARS |... | NOTE: Note, there is subtle change in the pci_enable_device() API. Any | driver that depends on SRIOV BARS to be enabled in pci_enable_device() | can fail. Put back bridge resource and ROM resource checking to fix the problem. That should fix regression like BIOS does not assign correct resource to bridge. Discussion can be found at: http://www.spinics.net/lists/linux-pci/msg12874.html Signed-off-by: Yinghai Lu <yinghai@kernel.org> Acked-by: Jesse Barnes <jbarnes@virtuousgeek.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-12-14PCI: Set device power state to PCI_D0 for device without native PM supportAjaykumar Hotchandani
During test of one IB card with guest VM, found that, msi is not initialized properly. It turns out __write_msi_msg will do nothing if device current_state is not PCI_D0. And, that pci device does not have pm_cap in guest VM. There is an error in setting of power state to PCI_D0 in pci_enable_device(), but error is not returned for this. Following is code flow: pci_enable_device() --> __pci_enable_device_flags() --> do_pci_enable_device() --> pci_set_power_state() --> __pci_start_power_transition() We have following condition inside __pci_start_power_transition(): if (platform_pci_power_manageable(dev)) { error = platform_pci_set_power_state(dev, state); if (!error) pci_update_current_state(dev, state); } else { error = -ENODEV; /* Fall back to PCI_D0 if native PM is not supported */ if (!dev->pm_cap) dev->current_state = PCI_D0; } Here, from platform_pci_set_power_state(), acpi_pci_set_power_state() is getting called and that is failing with ENODEV because of following condition: if (!handle || ACPI_SUCCESS(acpi_get_handle(handle, "_EJ0",&tmp))) return -ENODEV; Because of that, pci_update_current_state() is not getting called. With this patch, if device power state can not be set via platform_pci_set_power_state and that device does not have native pm support, then PCI device power state will be set to PCI_D0. -v2: This also reverts 47e9037ac16637cd7f12b8790ea7ce6680e42168, as it's not needed after this change. Acked-by: "Rafael J. Wysocki" <rjw@sisk.pl> Signed-off-by: Ajaykumar Hotchandani<ajaykumar.hotchandani@oracle.com> Signed-off-by: Yinghai Lu<yinghai.lu@oracle.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2011-12-13PCI hotplug: Always allow acpiphp to handle non-PCIe bridgesRafael J. Wysocki
Commit 0d52f54e2ef64c189dedc332e680b2eb4a34590a (PCI / ACPI: Make acpiphp ignore root bridges using PCIe native hotplug) added code that made the acpiphp driver completely ignore PCIe root complexes for which the kernel had been granted control of the native PCIe hotplug feature by the BIOS through _OSC. Unfortunately, however, this was a mistake, because on some systems there were PCI bridges supporting PCI (non-PCIe) hotplug under such root complexes and those bridges should have been handled by acpiphp. For this reason, revert the changes made by the commit mentioned above and make register_slot() in drivers/pci/hotplug/acpiphp_glue.c avoid registering hotplug slots for PCIe ports that belong to root complexes with native PCIe hotplug enabled (which means that the BIOS has granted the kernel control of this feature for the given root complex). This is reported to address the original issue fixed by commit 0d52f54e2ef64c189dedc332e680b2eb4a34590a and to work on the system where that commit broke things. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2011-12-06pci, x86/io-apic: Allow PCI_IOAPIC to be user configurable on x86Jan Beulich
This adjusts PCI_IOAPIC to be user configurable (possibly as a module) on x86, since the base architecture code for adding IO-APICs dynamically isn't there yet (and hence having the code present everywhere is pretty pointless). To make this consistent, a MODULE_DEVICE_TABLE() declaration gets added, the class specifications get corrected (by properly using PCI_DEVICE_CLASS() intended for purposes like this), and the probe and remove functions get their sections adjusted. Signed-off-by: Jan Beulich <jbeulich@suse.com> Acked-by: Jesse Barnes <jbarnes@virtuousgeek.org> Cc: Bjorn Helgaas <bhelgaas@google.com> Link: http://lkml.kernel.org/r/4EDDD71A02000078000659F1@nat28.tlf.novell.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-12-05PCI: fix ats compile failureJames Bottomley
I get this compile failure on parisc: drivers/pci/ats.c: In function 'ats_alloc_one': drivers/pci/ats.c:29: error: implicit declaration of function 'kzalloc' drivers/pci/ats.c:29: warning: assignment makes pointer from integer without a cast drivers/pci/ats.c: In function 'ats_free_one': drivers/pci/ats.c:45: error: implicit declaration of function 'kfree' Because ats.c is missing linux/slab.h as an include. This patch fixes it Signed-off-by: James Bottomley <JBottomley@Parallels.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2011-12-05PCI: defer enablement of SRIOV BARSRam Pai
All the PCI BARs of a device are enabled when the device is enabled using pci_enable_device(). This unnecessarily enables SRIOV BARs of the device. On some platforms, which do not support SRIOV as yet, the pci_enable_device() fails to enable the device if its SRIOV BARs are not allocated resources correctly. The following patch fixes the above problem. The SRIOV BARs are now enabled when IOV capability of the device is enabled in sriov_enable(). NOTE: Note, there is subtle change in the pci_enable_device() API. Any driver that depends on SRIOV BARS to be enabled in pci_enable_device() can fail. The patch has been touch tested on power and x86 platform. Tested-by: Michael Wang <wangyun@linux.vnet.ibm.com> Signed-off-by: Ram Pai <linuxram@us.ibm.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2011-12-05PCI: More PRI/PASID cleanupAlex Williamson
More consistency cleanups. Drop the _OFF, separate and indent CTRL/CAP/STATUS bit definitions. This helped find the previous mis-use of bit 0 in the PASID capability register. Reviewed-by: Joerg Roedel <joerg.roedel@amd.com> Tested-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Alex Williamson <alex.williamson@redhat.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2011-12-05PCI: Enable is not exposed as a PASID capabilityAlex Williamson
The PASID ECN indicates bit 0 is reserved in the capability register. Switch pci_enable_pasid() to error if PASID is already enabled and don't expose enable as a feature in pci_pasid_features(). Reviewed-by: Joerg Roedel <joerg.roedel@amd.com> Tested-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Alex Williamson <alex.williamson@redhat.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2011-12-05PCI: msi: Disable msi interrupts when we initialize a pci deviceEric W. Biederman
I traced a nasty kexec on panic boot failure to the fact that we had screaming msi interrupts and we were not disabling the msi messages at kernel startup. The booting kernel had not enabled those interupts so was not prepared to handle them. I can see no reason why we would ever want to leave the msi interrupts enabled at boot if something else has enabled those interrupts. The pci spec specifies that msi interrupts should be off by default. Drivers are expected to enable the msi interrupts if they want to use them. Our interrupt handling code reprograms the interrupt handlers at boot and will not be be able to do anything useful with an unexpected interrupt. This patch applies cleanly all of the way back to 2.6.32 where I noticed the problem. Cc: stable@kernel.org Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2011-12-05PCI/ACPI/PM: Avoid resuming devices that don't signal PMERafael J. Wysocki
Modify pci_acpi_wake_dev() to avoid resuming PME-capable devices whose PME Status bits are not set, which may happen currently if several devices are associated with the same wakeup GPE and all of them are notified whenever at least one of them signals PME. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>