summaryrefslogtreecommitdiff
path: root/include/linux
AgeCommit message (Collapse)Author
2012-02-18MFD: ucb1x00-core: add wakeup supportRussell King
Add genirq wakeup support for the ucb1x00 device. This allows an attached gpio_keys driver to wakeup the system. Touchscreen is also possible. When there are no wakeup sources, ask the platform to assert the reset signal to avoid any unexpected behaviour; this also puts the reset signal at the right level when power is removed from the device. Acked-by: Jochen Friedrich <jochen@scram.de> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2012-02-18MFD: ucb1x00: convert to use genirqRussell King
Convert the ucb1x00 driver to use genirq's interrupt services, rather than its own private implementation. This allows a wider range of drivers to use the GPIO interrupts (such as the gpio_keys driver) without being aware of the UCB1x00's private IRQ system. This prevents the UCB1x00 core driver from being built as a module, so adjust the configuration to add that restriction. Acked-by: Jochen Friedrich <jochen@scram.de> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2012-02-18MFD: mcp-core: remove legacy driver suspend/resume methodsRussell King
The legacy driver suspend/resume methods are no longer used, so get rid of them. Acked-by: Jochen Friedrich <jochen@scram.de> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2012-02-18MFD: ucb1x00-core: convert to use dev_pm_opsRussell King
Convert the ucb1x00-core driver to use dev_pm_ops rather than the legacy members in the mcp driver. Acked-by: Jochen Friedrich <jochen@scram.de> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2012-02-18MFD: ucb1x00-core: use mutexes instead of semaphoresRussell King
Convert the ucb1x00 driver to use mutexes rather than the depreciated semaphores for exclusive access to the ADC. Acked-by: Jochen Friedrich <jochen@scram.de> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2012-02-18MFD: ucb1x00-core: add handling for ucb1x00 resetRussell King
Provide a way to handle the software controlled ucb1x00 reset signal from the ucb1x00-core driver without having to code platform specifics into these drivers. Acked-by: Jochen Friedrich <jochen@scram.de> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2012-02-18MFD: mcp/ucb1x00: separate ucb1x00 driver data from the MCP dataRussell King
Patch taken from 5dd7bf59e0 (ARM: sa11x0: Implement autoloading of codec and codec pdata for mcp bus.) by Jochen Friedrich <jochen@scram.de>. This adds just the codec data part of the patch. Acked-by: Jochen Friedrich <jochen@scram.de> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2012-02-18slub: per cpu partial statistics changeAlex Shi
This patch split the cpu_partial_free into 2 parts: cpu_partial_node, PCP refilling times from node partial; and same name cpu_partial_free, PCP refilling times in slab_free slow path. A new statistic 'cpu_partial_drain' is added to get PCP drain to node partial times. These info are useful when do PCP tunning. The slabinfo.c code is unchanged, since cpu_partial_node is not on slow path. Signed-off-by: Alex Shi <alex.shi@intel.com> Acked-by: Christoph Lameter <cl@linux.com> Signed-off-by: Pekka Enberg <penberg@kernel.org>
2012-02-17nfsd41: implement NFS4_SHARE_WANT_NO_DELEG, NFS4_OPEN_DELEGATE_NONE_EXT, ↵Benny Halevy
why_no_deleg Respect client request for not getting a delegation in NFSv4.1 Appropriately return delegation "type" NFS4_OPEN_DELEGATE_NONE_EXT and WND4_NOT_WANTED reason. [nfsd41: add missing break when encoding op_why_no_deleg] Signed-off-by: Benny Halevy <bhalevy@tonian.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2012-02-17svcrdma: Cleanup sparse warnings in the svcrdma moduleTom Tucker
The svcrdma transport was un-marshalling requests in-place. This resulted in sparse warnings due to __beXX data containing both NBO and HBO data. The code has been restructured to do byte-swapping as the header is parsed instead of when the header is validated immediately after receipt. Also moved extern declarations for the workqueue and memory pools to the private header file. Signed-off-by: Tom Tucker <tom@ogc.us> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2012-02-17regmap: Add stub regmap calls as a build crutch for infrastructure usersMark Brown
Make life easier for subsystems which build infrastructure on top of the regmap API by providing stub definitions for most of the API so that users can at least build even if the regmap API is not enabled without having to add ifdefs if they don't want to. These stubs are not expected to be useful and should never actually get called, they just exist so that we can link so there are WARN_ONCE()s in the stubs. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2012-02-17PM: Add comment describing relationships between PM callbacks to pm.hRafael J. Wysocki
The UNIVERSAL_DEV_PM_OPS() macro is slightly misleading, because it may suggest that it's a good idea to point runtime PM callback pointers to the same routines as system suspend/resume callbacks .suspend() and .resume(), which is not the case. For this reason, add a comment to include/linux/pm.h, next to the definition of UNIVERSAL_DEV_PM_OPS(), describing how device PM callbacks are related to each other. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
2012-02-17PM / Sleep: Drop suspend_stats_update()Rafael J. Wysocki
Since suspend_stats_update() is only called from pm_suspend(), move its code directly into that function and remove the static inline definition from include/linux/suspend.h. Clean_up pm_suspend() in the process. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
2012-02-17NFS: include filelayout DS rpc stats in mountstatsWeston Andros Adamson
Include RPC statistics from all data servers in /proc/self/mountstats for pNFS filelayout mounts. Signed-off-by: Weston Andros Adamson <dros@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-02-17Merge branch 'tip/perf/core' of ↵Ingo Molnar
git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace into perf/core
2012-02-16regulator: fix wrong header name in descriptionKim, Milo
The 'mode' is defined in consumer.h. * patch base version : linux-3.2.4 Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2012-02-16net: sh_eth: change the condition of initializationYoshihiro Shimoda
The SH7757 has 2 Fast Ethernet and 2 Gigabit Ethernet, and the first Gigabit channel needs the initialization. So, this patch adds the parameter of "needs_init", and if the sh_eth_plat_data is set it to 1, the driver will initialize the channel. Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-02-16SUNRPC: Use KERN_DEFAULT for debugging printk'sChuck Lever
Our dprintk() debugging facility doesn't specify any verbosity level for it's printk() calls, but it should. The default verbosity for printk's is KERN_DEFAULT. You might argue that these are debugging printk's and thus the verbosity should be KERN_DEBUG. That would mean that to see NFS and SUNRPC debugging output an admin would also have to boost the syslog verbosity, which would be insufferably noisy. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-02-16SUNRPC: add sending,pending queue and max slot to xprt statsAndy Adamson
With static RPC slots, the xprt backlog queue stats were useful in showing when the transport (TCP) was starved by lack of RPC slots. The new dynamic RPC slot code, commit d9ba131d8f58c0d2ff5029e7002ab43f913b36f9, always provides an RPC slot and so only uses the xprt backlog queue when the tcp_max_slot_table_entries value has been hit or when an allocation error occurs. All requests are now placed on the xprt sending or pending queue which need to be monitored for debugging. The max_slot stat shows the maximum number of dynamic RPC slots reached which is useful when debugging performance issues. Add the new fields at the end of the mountstats xprt stanza so that mountstats outputs the previous correct values and ignores the new fields. Bump NFS_IOSTATS_VERS. Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-02-16irq_domain: constify irq_domain_opsGrant Likely
Make irq_domain_ops pointer a constant to make it safer for multiple instances to share the same ops pointer and change the irq_domain code so that it does not modify the ops. v4: Fix mismatched type reference in powerpc code Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Milton Miller <miltonm@bga.com> Tested-by: Olof Johansson <olof@lixom.net>
2012-02-16irq_domain: Create common xlate functions that device drivers can useGrant Likely
Rather than having each interrupt controller driver creating its own barely unique .xlate function for irq_domain, create a library of translators which any driver can use directly. v5: - Remove irq_domain_xlate_pci(). It was incorrect. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Cc: Rob Herring <rob.herring@calxeda.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Mark Salter <msalter@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Milton Miller <miltonm@bga.com> Tested-by: Olof Johansson <olof@lixom.net>
2012-02-16irq_domain: Remove irq_domain_add_simple()Grant Likely
irq_domain_add_simple() was a stop-gap measure until complete irq_domain support was complete. This patch removes the irq_domain_add_simple() interface. This patch also drops the explicit irq_domain initialization performed by the mach-versatile code because the versatile interrupt controller already has irq_domain support built into it. This was a bug that was hanging around quietly for a while, but with the full irq_domain which actually verifies that irq_domain ranges are available it would cause the registration to fail and the system wouldn't boot. v4: Fixed number of irqs in mx5 gpio code v2: Updated to pass in host_data pointer on irq_domain allocation. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Cc: Rob Herring <rob.herring@calxeda.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Milton Miller <miltonm@bga.com> Cc: Russell King <linux@arm.linux.org.uk> Tested-by: Olof Johansson <olof@lixom.net>
2012-02-16irq_domain: Remove 'new' irq_domain in favour of the ppc oneGrant Likely
This patch removes the simplistic implementation of irq_domains and enables the powerpc infrastructure for all irq_domain users. The powerpc infrastructure includes support for complex mappings between Linux and hardware irq numbers, and can manage allocation of irq_descs. This patch also converts the few users of irq_domain_add()/irq_domain_del() to call irq_domain_add_legacy() instead. v3: Fix bug that set up too many irqs in translation range. v2: Fix removal of irq_alloc_descs() call in gic driver Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Cc: Rob Herring <rob.herring@calxeda.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Milton Miller <miltonm@bga.com> Tested-by: Olof Johansson <olof@lixom.net>
2012-02-16of/address: add empty static inlines for !CONFIG_OFGrant Likely
As the title says, this patch adds empty implementations for the address translation functions so that they can be used when CONFIG_OF is disabled. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Cc: Rob Herring <rob.herring@calxeda.com>
2012-02-16irq_domain: Add support for base irq and hwirq in legacy mappingsGrant Likely
Add support for a legacy mapping where irq = (hwirq - first_hwirq + first_irq) so that a controller driver can allocate a fixed range of irq_descs and use a simple calculation to translate back and forth between linux and hw irq numbers. This is needed to use an irq_domain with many of the ARM interrupt controller drivers that manage their own irq_desc allocations. Ultimately the goal is to migrate those drivers to use the linear revmap, but doing it this way allows each driver to be converted separately which makes the migration path easier. This patch generalizes the IRQ_DOMAIN_MAP_LEGACY method to use (first_irq-first_hwirq) as the offset between hwirq and linux irq number, and adds checks to make sure that the hwirq number does not exceed range assigned to the controller. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Cc: Rob Herring <rob.herring@calxeda.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Milton Miller <miltonm@bga.com> Tested-by: Olof Johansson <olof@lixom.net>
2012-02-16irq_domain: Replace irq_alloc_host() with revmap-specific initializersGrant Likely
Each revmap type has different arguments for setting up the revmap. This patch splits up the generator functions so that each revmap type can do its own setup and the user doesn't need to keep track of how each revmap type handles the arguments. This patch also adds a host_data argument to the generators. There are cases where the host_data pointer will be needed before the function returns. ie. the legacy map calls the .map callback for each irq before returning. v2: - Add void *host_data argument to irq_domain_add_*() functions - fixed failure to compile - Moved IRQ_DOMAIN_MAP_* defines into irqdomain.c Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Cc: Rob Herring <rob.herring@calxeda.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Milton Miller <miltonm@bga.com> Tested-by: Olof Johansson <olof@lixom.net>
2012-02-16irq_domain: Move irq_domain code from powerpc to kernel/irqGrant Likely
This patch only moves the code. It doesn't make any changes, and the code is still only compiled for powerpc. Follow-on patches will generalize the code for other architectures. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Milton Miller <miltonm@bga.com> Tested-by: Olof Johansson <olof@lixom.net>
2012-02-16crypto: sha512 - use standard ror64()Alexey Dobriyan
Use standard ror64() instead of hand-written. There is no standard ror64, so create it. The difference is shift value being "unsigned int" instead of uint64_t (for which there is no reason). gcc starts to emit native ROR instructions which it doesn't do for some reason currently. This should make the code faster. Patch survives in-tree crypto test and ping flood with hmac(sha512) on. Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2012-02-16Yama: add PR_SET_PTRACER_ANYKees Cook
For a process to entirely disable Yama ptrace restrictions, it can use the special PR_SET_PTRACER_ANY pid to indicate that any otherwise allowed process may ptrace it. This is stronger than calling PR_SET_PTRACER with pid "1" because it includes processes in external pid namespaces. This is currently needed by the Chrome renderer, since its crash handler (Breakpad) runs external to the renderer's pid namespace. Signed-off-by: Kees Cook <keescook@chromium.org> Signed-off-by: James Morris <jmorris@namei.org>
2012-02-15Merge branch 'master' of ↵John W. Linville
git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless Conflicts: net/mac80211/debugfs_sta.c net/mac80211/sta_info.h
2012-02-15dt: add empty of_find_compatible_node functionShawn Guo
Add empty of_find_compatible_node function for !CONFIG_OF build. Signed-off-by: Shawn Guo <shawn.guo@linaro.org> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2012-02-15Merge branch 'fortglx/3.4/time' of git://git.linaro.org/people/jstultz/linux ↵Thomas Gleixner
into timers/core
2012-02-15Merge branch 'fortglx/3.4/clocksource' of ↵Thomas Gleixner
git://git.linaro.org/people/jstultz/linux into timers/core
2012-02-15block: exit_io_context() should call elevator_exit_icq_fn()Tejun Heo
While updating locking, b2efa05265 "block, cfq: unlink cfq_io_context's immediately" moved elevator_exit_icq_fn() invocation from exit_io_context() to the final ioc put. While this doesn't cause catastrophic failure, it effectively removes task exit notification to elevator and cause noticeable IO performance degradation with CFQ. On task exit, CFQ used to immediately expire the slice if it was being used by the exiting task as no more IO would be issued by the task; however, after b2efa05265, the notification is lost and disk could sit idle needlessly, leading to noticeable IO performance degradation for certain workloads. This patch renames ioc_exit_icq() to ioc_destroy_icq(), separates elevator_exit_icq_fn() invocation into ioc_exit_icq() and invokes it from exit_io_context(). ICQ_EXITED flag is added to avoid invoking the callback more than once for the same icq. Walking icq_list from ioc side and invoking elevator callback requires reverse double locking. This may be better implemented using RCU; unfortunately, using RCU isn't trivial. e.g. RCU protection would need to cover request_queue and queue_lock switch on cleanup makes grabbing queue_lock from RCU unsafe. Reverse double locking should do, at least for now. Signed-off-by: Tejun Heo <tj@kernel.org> Reported-and-bisected-by: Shaohua Li <shli@kernel.org> LKML-Reference: <CANejiEVzs=pUhQSTvUppkDcc2TNZyfohBRLygW5zFmXyk5A-xQ@mail.gmail.com> Tested-by: Shaohua Li <shaohua.li@intel.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2012-02-15block: replace icq->changed with icq->flagsTejun Heo
icq->changed was used for ICQ_*_CHANGED bits. Rename it to flags and access it under ioc->lock instead of using atomic bitops. ioc_get_changed() is added so that the changed part can be fetched and cleared as before. icq->flags will be used to carry other flags. Signed-off-by: Tejun Heo <tj@kernel.org> Tested-by: Shaohua Li <shaohua.li@intel.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2012-02-15usb: uac2: Add ACHeader and FormatType descriptorJassi Brar
Add missing, but needed, ACHeader and FormatType descriptor definitions. Signed-off-by: Yadi Brar <yadi.brar01@gmail.com> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org> Signed-off-by: Felipe Balbi <balbi@ti.com>
2012-02-15SUNRPC: Ensure that we can trace waitqueues when !defined(CONFIG_SYSCTL)Trond Myklebust
The tracepoint code relies on the queue->name being defined in order to be able to display the name of the waitqueue on which an RPC task is sleeping. Reported-by: Randy Dunlap <rdunlap@xenotime.net> Reported-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> Acked-by: Steven Rostedt <rostedt@goodmis.org> Acked-by: Randy Dunlap <rdunlap@xenotime.net>
2012-02-15Lockd: shutdown NLM hosts in network namespace contextStanislav Kinsbursky
Lockd now managed in network namespace context. And this patch introduces network namespace related NLM hosts shutdown in case of releasing per-net Lockd resources. Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-02-15LockD: make nlm hosts network namespace awareStanislav Kinsbursky
This object depends on RPC client, and thus on network namespace. So let's make it's allocation and lookup in network namespace context. Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-02-15Lockd: per-net up and down routines introducedStanislav Kinsbursky
This patch introduces per-net Lockd initialization and destruction routines. The logic is the same as in global Lockd up and down routines. Probably the solution is not the best one. But at least it looks clear. So per-net "up" routine are called only in case of lockd is running already. If per-net resources are not allocated yet, then service is being registered with local portmapper and lockd sockets created. Per-net "down" routine is called on every lockd_down() call in case of global users counter is not zero. Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-02-15SUNRPC: service destruction in network namespace contextStanislav Kinsbursky
v2: Added comment to BUG_ON's in svc_destroy() to make code looks clearer. This patch introduces network namespace filter for service destruction function. Nothing special here - just do exactly the same operations, but only for tranports in passed networks namespace context. BTW, BUG_ON() checks for empty service transports lists were returned into svc_destroy() function. This is because of swithing generic svc_close_all() to networks namespace dependable svc_close_net(). Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-02-15NFSv4.1: Add a module parameter to set the number of session slotsTrond Myklebust
Add the module parameter 'max_session_slots' to set the initial number of slots that the NFSv4.1 client will attempt to negotiate with the server. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-02-15NFSv4.1: Convert slotid from u8 to u32Trond Myklebust
It is perfectly legal to negotiate up to 2^32-1 slots in the protocol, and with 10GigE, we are already seeing that 255 slots is far too limiting. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-02-14regmap: add regmap_bulk_write() for register writeLaxman Dewangan
The bulk_write() supports the data transfer to multi register which takes the data into cpu_endianness format and does formatting of data to device format before sending to device. The transfer can be completed in single transfer or multiple transfer based on data formatting. Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2012-02-14irq_domain: Make irq_domain structure match powerpc's irq_hostGrant Likely
Part of the series to unify the irq remapping mechanisms in the kernel. A follow up patch will copy the powerpc implementation into kernel/irq/irqdomain.c, which will be a lot easier if the structures are identical. Where they differ, I've chose to use the powerpc names since there is a lot more code using those names. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Cc: Rob Herring <rob.herring@calxeda.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Milton Miller <miltonm@bga.com> Tested-by: Olof Johansson <olof@lixom.net>
2012-02-14posix_types: Remove fd_set macrosH. Peter Anvin
<asm/posix_types.h> includes a set of macros that operate on file descriptors. Way long ago those were exported to user space, but nowadays they are #ifdef __KERNEL__. However, they are nothing but standard (nonatomic) bit operations, and we already have optimized versions of bit operations in the kernel. We can't include <linux/bitops.h> in <asm/posix_types.h> but we can move the definitions to <linux/time.h> and define them there in terms of standard kernel bitops. [ v2: folds the following fixes in: a) Stray space in __FD_SET(), reported by Andrew Morton b) #include <linux/string.h> needed for memset(), reported by Tony Luck ] Signed-off-by: H. Peter Anvin <hpa@zytor.com> Link: http://lkml.kernel.org/r/1328677745-20121-22-git-send-email-hpa@zytor.com Cc: Arnd Bergmann <arnd@arndb.de> Cc: Tony Luck <tony.luck@intel.com> Cc: Andrew Morton <akpm@linux-foundation.org>
2012-02-14USB/xHCI: Support device-initiated USB 3.0 resume.Sarah Sharp
USB 3.0 hubs don't have a port suspend change bit (that bit is now reserved). Instead, when a host-initiated resume finishes, the hub sets the port link state change bit. When a USB 3.0 device initiates remote wakeup, the parent hubs with their upstream links in U3 will pass the LFPS up the chain. The first hub that has an upstream link in U0 (which may be the roothub) will reflect that LFPS back down the path to the device. However, the parent hubs in the resumed path will not set their link state change bit. Instead, the device that initiated the resume has to send an asynchronous "Function Wake" Device Notification up to the host controller. Therefore, we need a way to notify the USB core of a device resume without going through the normal hub URB completion method. First, make the xHCI roothub act like an external USB 3.0 hub and not pass up the port link state change bit when a device-initiated resume finishes. Introduce a new xHCI bit field, port_remote_wakeup, so that we can tell the difference between a port coming out of the U3Exit state (host-initiated resume) and the RExit state (ending state of device-initiated resume). Since the USB core can't tell whether a port on a hub has resumed by looking at the Hub Status buffer, we need to introduce a bitfield, wakeup_bits, that indicates which ports have resumed. When the xHCI driver notices a port finishing a device-initiated resume, we call into a new USB core function, usb_wakeup_notification(), that will set the right bit in wakeup_bits, and kick khubd for that hub. We also call usb_wakeup_notification() when the Function Wake Device Notification is received by the xHCI driver. This covers the case where the link between the roothub and the first-tier hub is in U0, and the hub reflects the resume signaling back to the device without giving any indication it has done so until the device sends the Function Wake notification. Change the code in khubd that handles the remote wakeup to look at the state the USB core thinks the device is in, and handle the remote wakeup if the port's wakeup bit is set. This patch only takes care of the case where the device is attached directly to the roothub, or the USB 3.0 hub that is attached to the root hub is the device sending the Function Wake Device Notification (e.g. because a new USB device was attached). The other cases will be covered in a second patch. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
2012-02-14USB/xHCI: Enable USB 3.0 hub remote wakeup.Sarah Sharp
USB 3.0 hubs have a different remote wakeup policy than USB 2.0 hubs. USB 2.0 hubs, once they have remote wakeup enabled, will always send remote wakes when anything changes on a port. However, USB 3.0 hubs have a per-port remote wake up policy that is off by default. The Set Feature remote wake mask can be changed for any port, enabling remote wakeup for a connect, disconnect, or overcurrent event, much like EHCI and xHCI host controller "wake on" port status bits. The bits are cleared to zero on the initial hub power on, or after the hub has been reset. Without this patch, when a USB 3.0 hub gets suspended, it will not send a remote wakeup on device connect or disconnect. This would show up to the user as "dead ports" unless they ran lsusb -v (since newer versions of lsusb use the sysfs files, rather than sending control transfers). Change the hub driver's suspend method to enable remote wake up for disconnect, connect, and overcurrent for all ports on the hub. Modify the xHCI driver's roothub code to handle that request, and set the "wake on" bits in the port status registers accordingly. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
2012-02-14PCI: Move struct resource_list to setup-bus.cYinghai Lu
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>
2012-02-14PCI: Move pdev_sort_resources() to setup-bus.cYinghai Lu
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>