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path: root/drivers/pci/pci-label.c
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2015-04-08PCI: Make a shareable UUID for PCI firmware ACPI _DSMAaron Lu
The PCI Firmware Specification, r3.0, sec 4.6.4.1.3, defines a single UUID for an ACPI _DSM method to provide device-specific control functions. This _DSM method support several functions, including PCI Express Slot Information, PCI Express Slot Number, PCI Bus Capabilities, etc. Move the UUID definition from pci/pci-label.c, where it could be used only for one function, to pci/pci-acpi.c where it can be shared for all these functions. [bhelgaas: changelog] Signed-off-by: Aaron Lu <aaron.lu@intel.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-07-02ACPI / PCI: Fix sysfs acpi_index and label errorsSimone Gotti
Fix errors in handling "device label" _DSM return values. If _DSM returns a Unicode string, the ACPI type is ACPI_TYPE_BUFFER, not ACPI_TYPE_STRING. Fix dsm_label_utf16s_to_utf8s() to convert UTF-16 from acpi_object->buffer instead of acpi_object->string. Prior to v3.14, we accepted Unicode labels (ACPI_TYPE_BUFFER return values). But after 1d0fcef73283, we accepted only ASCII (ACPI_TYPE_STRING) (and we incorrectly tried to convert those ASCII labels from UTF-16 to UTF-8). Rejecting Unicode labels made us return -EPERM when reading sysfs "acpi_index" or "label" files, which in turn caused on-board network interfaces on a Dell PowerEdge E420 to be renamed (by udev net_id internal) from eno1/eno2 to enp2s0f0/enp2s0f1. Fix this by accepting either ACPI_TYPE_STRING (and treating it as ASCII) or ACPI_TYPE_BUFFER (and converting from UTF-16 to UTF-8). [bhelgaas: changelog] Fixes: 1d0fcef73283 ("ACPI / PCI: replace open-coded _DSM code with helper functions") Signed-off-by: Simone Gotti <simone.gotti@gmail.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Jiang Liu <jiang.liu@linux.intel.com> CC: stable@vger.kernel.org # v3.14+
2014-06-10PCI: Whitespace cleanupRyan Desfosses
Fix various whitespace errors. No functional change. [bhelgaas: fix other similar problems] Signed-off-by: Ryan Desfosses <ryan@desfo.org> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2014-01-24Merge tag 'pm+acpi-3.14-rc1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm Pull ACPI and power management updates from Rafael Wysocki: "As far as the number of commits goes, the top spot belongs to ACPI this time with cpufreq in the second position and a handful of PM core, PNP and cpuidle updates. They are fixes and cleanups mostly, as usual, with a couple of new features in the mix. The most visible change is probably that we will create struct acpi_device objects (visible in sysfs) for all devices represented in the ACPI tables regardless of their status and there will be a new sysfs attribute under those objects allowing user space to check that status via _STA. Consequently, ACPI device eject or generally hot-removal will not delete those objects, unless the table containing the corresponding namespace nodes is unloaded, which is extremely rare. Also ACPI container hotplug will be handled quite a bit differently and cpufreq will support CPU boost ("turbo") generically and not only in the acpi-cpufreq driver. Specifics: - ACPI core changes to make it create a struct acpi_device object for every device represented in the ACPI tables during all namespace scans regardless of the current status of that device. In accordance with this, ACPI hotplug operations will not delete those objects, unless the underlying ACPI tables go away. - On top of the above, new sysfs attribute for ACPI device objects allowing user space to check device status by triggering the execution of _STA for its ACPI object. From Srinivas Pandruvada. - ACPI core hotplug changes reducing code duplication, integrating the PCI root hotplug with the core and reworking container hotplug. - ACPI core simplifications making it use ACPI_COMPANION() in the code "glueing" ACPI device objects to "physical" devices. - ACPICA update to upstream version 20131218. This adds support for the DBG2 and PCCT tables to ACPICA, fixes some bugs and improves debug facilities. From Bob Moore, Lv Zheng and Betty Dall. - Init code change to carry out the early ACPI initialization earlier. That should allow us to use ACPI during the timekeeping initialization and possibly to simplify the EFI initialization too. From Chun-Yi Lee. - Clenups of the inclusions of ACPI headers in many places all over from Lv Zheng and Rashika Kheria (work in progress). - New helper for ACPI _DSM execution and rework of the code in drivers that uses _DSM to execute it via the new helper. From Jiang Liu. - New Win8 OSI blacklist entries from Takashi Iwai. - Assorted ACPI fixes and cleanups from Al Stone, Emil Goode, Hanjun Guo, Lan Tianyu, Masanari Iida, Oliver Neukum, Prarit Bhargava, Rashika Kheria, Tang Chen, Zhang Rui. - intel_pstate driver updates, including proper Baytrail support, from Dirk Brandewie and intel_pstate documentation from Ramkumar Ramachandra. - Generic CPU boost ("turbo") support for cpufreq from Lukasz Majewski. - powernow-k6 cpufreq driver fixes from Mikulas Patocka. - cpufreq core fixes and cleanups from Viresh Kumar, Jane Li, Mark Brown. - Assorted cpufreq drivers fixes and cleanups from Anson Huang, John Tobias, Paul Bolle, Paul Walmsley, Sachin Kamat, Shawn Guo, Viresh Kumar. - cpuidle cleanups from Bartlomiej Zolnierkiewicz. - Support for hibernation APM events from Bin Shi. - Hibernation fix to avoid bringing up nonboot CPUs with ACPI EC disabled during thaw transitions from Bjørn Mork. - PM core fixes and cleanups from Ben Dooks, Leonardo Potenza, Ulf Hansson. - PNP subsystem fixes and cleanups from Dmitry Torokhov, Levente Kurusa, Rashika Kheria. - New tool for profiling system suspend from Todd E Brandt and a cpupower tool cleanup from One Thousand Gnomes" * tag 'pm+acpi-3.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (153 commits) thermal: exynos: boost: Automatic enable/disable of BOOST feature (at Exynos4412) cpufreq: exynos4x12: Change L0 driver data to CPUFREQ_BOOST_FREQ Documentation: cpufreq / boost: Update BOOST documentation cpufreq: exynos: Extend Exynos cpufreq driver to support boost cpufreq / boost: Kconfig: Support for software-managed BOOST acpi-cpufreq: Adjust the code to use the common boost attribute cpufreq: Add boost frequency support in core intel_pstate: Add trace point to report internal state. cpufreq: introduce cpufreq_generic_get() routine ARM: SA1100: Create dummy clk_get_rate() to avoid build failures cpufreq: stats: create sysfs entries when cpufreq_stats is a module cpufreq: stats: free table and remove sysfs entry in a single routine cpufreq: stats: remove hotplug notifiers cpufreq: stats: handle cpufreq_unregister_driver() and suspend/resume properly cpufreq: speedstep: remove unused speedstep_get_state platform: introduce OF style 'modalias' support for platform bus PM / tools: new tool for suspend/resume performance optimization ACPI: fix module autoloading for ACPI enumerated devices ACPI: add module autoloading support for ACPI enumerated devices ACPI: fix create_modalias() return value handling ...
2014-01-13PCI: Reorder so actual code comes before stubsBjorn Helgaas
Consistently use the: #ifdef CONFIG_PCI_FOO int pci_foo(...); #else static inline int pci_foo(...) { return -1; } #endif pattern, instead of sometimes using "#ifndef CONFIG_PCI_FOO". No functional change. Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2014-01-12Merge branch 'acpi-dsm'Rafael J. Wysocki
* acpi-dsm: ACPI / extlog: replace open-coded _DSM code with helper functions ACPI / nouveau: replace open-coded _DSM code with helper functions nouveau / ACPI: fix memory leak in ACPI _DSM related code ACPI / i915: replace open-coded _DSM code with helper functions ACPI / i2c-hid: replace open-coded _DSM code with helper functions ACPI / TPM: detect PPI features by checking availability of _DSM functions ACPI / TPM: replace open-coded _DSM code with helper functions ACPI / TPM: match node name instead of full path when searching for TPM device PCI / pci-label: treat PCI label with index 0 as valid label ACPI / PCI: replace open-coded _DSM code with helper functions PCI / pci-label: release allocated ACPI object on error recovery path ACPI: introduce helper interfaces for _DSM method
2014-01-05PCI / pci-label: treat PCI label with index 0 as valid labelJiang Liu
Current pci-label driver detects ACPI label by checking label index returned by ACPI _DSM method, and treats it as valid if label index is positive. According to ACPI Firmware specification 3.1, zero is also an valid label index. So change code to detect availability of ACPI slot label by checking availaiblity of ACPI _DSM function for PCI label. Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-01-05ACPI / PCI: replace open-coded _DSM code with helper functionsJiang Liu
Use helper functions to simplify _DSM related code in pci-label driver. Also enforce more strict checks on objects returned by _DSM method. Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-01-05PCI / pci-label: release allocated ACPI object on error recovery pathJiang Liu
Function dsm_get_label() leaks the returned ACPI object if obj->package.count is not 2, so fix the possible memory leak. Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-12-07ACPI: Clean up inclusions of ACPI header filesLv Zheng
Replace direct inclusions of <acpi/acpi.h>, <acpi/acpi_bus.h> and <acpi/acpi_drivers.h>, which are incorrect, with <linux/acpi.h> inclusions and remove some inclusions of those files that aren't necessary. First of all, <acpi/acpi.h>, <acpi/acpi_bus.h> and <acpi/acpi_drivers.h> should not be included directly from any files that are built for CONFIG_ACPI unset, because that generally leads to build warnings about undefined symbols in !CONFIG_ACPI builds. For CONFIG_ACPI set, <linux/acpi.h> includes those files and for CONFIG_ACPI unset it provides stub ACPI symbols to be used in that case. Second, there are ordering dependencies between those files that always have to be met. Namely, it is required that <acpi/acpi_bus.h> be included prior to <acpi/acpi_drivers.h> so that the acpi_pci_root declarations the latter depends on are always there. And <acpi/acpi.h> which provides basic ACPICA type declarations should always be included prior to any other ACPI headers in CONFIG_ACPI builds. That also is taken care of including <linux/acpi.h> as appropriate. Signed-off-by: Lv Zheng <lv.zheng@intel.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Matthew Garrett <mjg59@srcf.ucam.org> Cc: Tony Luck <tony.luck@intel.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Acked-by: Bjorn Helgaas <bhelgaas@google.com> (drivers/pci stuff) Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> (Xen stuff) Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-11-14ACPI: Eliminate the DEVICE_ACPI_HANDLE() macroRafael J. Wysocki
Since DEVICE_ACPI_HANDLE() is now literally identical to ACPI_HANDLE(), replace it with the latter everywhere and drop its definition from include/acpi.h. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-01-03switch ->is_visible() to returning umode_tAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-07-26pci-label.c: size_t misspelled as mode_tAl Viro
no, really, strlen() and snprintf() do not return mode_t values... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-03-16PCI: label: remove #include of ACPI header to avoid warningsShyam_Iyer@Dell.com
I found that including acpi/apci_drivers.h is not necessary and introduces these warnings: In file included from drivers/pci/pci-label.c:32: include/acpi/acpi_drivers.h:103: warning: ‘struct acpi_device’ declared inside parameter list include/acpi/acpi_drivers.h:103: warning: its scope is only this definition or declaration, which is probably not what you want include/acpi/acpi_drivers.h:107: warning: ‘struct acpi_pci_root’ declared inside parameter list Signed-off-by: Shyam Iyer <shyam_iyer@dell.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2011-03-16PCI: label: Fix compilation error when CONFIG_ACPI is unsetNarendra_K@Dell.com
This patch fixes compilation error descibed below introduced by the commit 6058989bad05b82e78baacce69ec14f27a11b5fd drivers/pci/pci-label.c: In function ‘pci_create_firmware_label_files’: drivers/pci/pci-label.c:366:2: error: implicit declaration of function ‘device_has_dsm’ Signed-off-by: Narendra K <narendra_k@dell.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2011-03-04PCI: Export ACPI _DSM provided firmware instance number and string name to sysfsNarendra_K@Dell.com
This patch exports ACPI _DSM (Device Specific Method) provided firmware instance number and string name of PCI devices as defined by 'PCI Firmware Specification Revision 3.1' section 4.6.7.( DSM for Naming a PCI or PCI Express Device Under Operating Systems) to sysfs. New files created are: /sys/bus/pci/devices/.../label which contains the firmware name for the device in question, and /sys/bus/pci/devices/.../acpi_index which contains the firmware device type instance for the given device. cat /sys/devices/pci0000:00/0000:00:01.0/0000:01:00.0/acpi_index 1 cat /sys/devices/pci0000:00/0000:00:01.0/0000:01:00.0/label Embedded Broadcom 5709C NIC 1 cat /sys/devices/pci0000:00/0000:00:01.0/0000:01:00.1/acpi_index 2 cat /sys/devices/pci0000:00/0000:00:01.0/0000:01:00.1/label Embedded Broadcom 5709C NIC 2 The ACPI _DSM provided firmware 'instance number' and 'string name' will be given priority if the firmware also provides 'SMBIOS type 41 device type instance and string'. Signed-off-by: Matthew Garrett <mjg@redhat.com> Signed-off-by: Jordan Hargrave <jordan_hargrave@dell.com> Signed-off-by: Narendra K <narendra_k@dell.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2010-08-04PCI: update for owner removal from struct device_attributeStephen Rothwell
Fixes the build. Acked-by: Guenter Roeck <guenter.roeck@ericsson.com> Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2010-07-30PCI: export SMBIOS provided firmware instance and label to sysfsNarendra K
This patch exports SMBIOS provided firmware instance and label of onboard PCI devices to sysfs. New files are: /sys/bus/pci/devices/.../label which contains the firmware name for the device in question, and /sys/bus/pci/devices/.../index which contains the firmware device type instance for the given device. Signed-off-by: Jordan Hargrave <jordan_hargrave@dell.com> Signed-off-by: Narendra K <narendra_k@dell.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>