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* Merge tag 'char-misc-4.1-rc1' of ↵Linus Torvalds2015-04-21
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc Pull char/misc driver updates from Greg KH: "Here's the big char/misc driver patchset for 4.1-rc1. Lots of different driver subsystem updates here, nothing major, full details are in the shortlog. All of this has been in linux-next for a while" * tag 'char-misc-4.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (133 commits) mei: trace: remove unused TRACE_SYSTEM_STRING DTS: ARM: OMAP3-N900: Add lis3lv02d support Documentation: DT: lis302: update wakeup binding lis3lv02d: DT: add wakeup unit 2 and wakeup threshold lis3lv02d: DT: use s32 to support negative values Drivers: hv: hv_balloon: correctly handle num_pages>INT_MAX case Drivers: hv: hv_balloon: correctly handle val.freeram<num_pages case mei: replace check for connection instead of transitioning mei: use mei_cl_is_connected consistently mei: fix mei_poll operation hv_vmbus: Add gradually increased delay for retries in vmbus_post_msg() Drivers: hv: hv_balloon: survive ballooning request with num_pages=0 Drivers: hv: hv_balloon: eliminate jumps in piecewiese linear floor function Drivers: hv: hv_balloon: do not online pages in offline blocks hv: remove the per-channel workqueue hv: don't schedule new works in vmbus_onoffer()/vmbus_onoffer_rescind() hv: run non-blocking message handlers in the dispatch tasklet coresight: moving to new "hwtracing" directory coresight-tmc: Adding a status interface to sysfs coresight: remove the unnecessary configuration coresight-default-sink ...
| * mei: replace check for connection instead of transitioningTomas Winkler2015-04-03
| | | | | | | | | | | | | | | | | | | | The function mei_cl_is_transitioning is just opposite of mei_cl_is_connected. What we actually wanted to check is if we lost connection so we can discard the check for transition and check for 'not connected' Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| * mei: use mei_cl_is_connected consistentlyTomas Winkler2015-04-03
| | | | | | | | | | | | | | | | | | | | | | Replace open coded check for cl->state !=/== MEI_FILE_CONNECTED with mei_cl_is_connected function. Note that cl->state != MEI_FILE_CONNECTED is not the same as cl->state == MEI_FILE_DISCONNECTED Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| * mei: fix mei_poll operationTomas Winkler2015-04-03
| | | | | | | | | | | | | | | | | | mei_poll returned with POLLIN w/o checking whether the operation has really completed. remove redundant check and locking in amthif specific handler Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| * mei: allow read concurrencyTomas Winkler2015-03-01
| | | | | | | | | | | | | | | | | | Replace clunky read state machine with read stack implemented as per client read list, this is important mostly for mei drivers with unsolicited reads Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| * mei: simplify io callback disposalTomas Winkler2015-03-01
| | | | | | | | | | | | | | | | Simplify disposal of io callback by removing the callback implicitly from its lookup list inside mei_io_cb_free Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| * mei: add mei_cl_alloc_linked functionTomas Winkler2015-03-01
| | | | | | | | | | | | | | | | Add convenient wrapper mei_cl_alloc_linked to simplify error handling Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| * mei: always initialize the callback with the intended operation typeTomas Winkler2015-03-01
| | | | | | | | | | | | | | | | | | | | | | We set the operation type at initialization time as each cb is used only for a single type of operation As a byproduct we add a convenient wrapper for allocating cb with the data buffer. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| * mei: use only one buffer in callbackTomas Winkler2015-03-01
| | | | | | | | | | | | | | | | | | The callback structure is used exclusively for reading or writing therefore there is no reason to hold both response and request buffers in the callback structure Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| * mei: iamthif: use client write functionsTomas Winkler2015-03-01
| | | | | | | | | | | | | | | | | | | | Reduce code duplication in amthif code by reusing regular client write functions. Add completed flag to cb so amthif client can add rx credits on write completion Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| * mei: fix device reset on mei_cl_irq_read_msg allocation failureTomas Winkler2015-03-01
| | | | | | | | | | | | | | | | | | | | On memory allocation failure mei_cl_irq_read_msg will return with error that will cause device reset. Instead we should propagate error to caller and just clean the read queues. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | fs: move struct kiocb to fs.hChristoph Hellwig2015-03-25
|/ | | | | | | | struct kiocb now is a generic I/O container, so move it to fs.h. Also do a #include diet for aio.h while we're at it. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* mei: add reference counting for me clientsTomas Winkler2015-01-25
| | | | | | | | | | To support dynamic addition and removal of me clients we add reference counter. Update kdoc with locking requirements. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* mei: export fw status registers through sysfsTomas Winkler2014-11-26
| | | | | | | | | | | The interface is for applications that monitor the fw health. We use device_create_with_groups interface to register attribute with the mei class device Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* mei: fix KDoc documentation formattingAlexander Usyskin2014-09-29
| | | | | | | | | Fix Kdoc documentation formatting warnings genertaed by ./scripts/kernel-doc Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* mei: remove include to pci header from mei module filesTomas Winkler2014-09-29
| | | | | | | | | Remove inclusion of linux/pci.h in mei layer however we need to include the headers that before got included implicitly from linux/pci.h. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* mei: get rid of most of the pci dependencies in meiTomas Winkler2014-09-29
| | | | | | | | | | For purpose of adding testing HW we would like to get rid of pci dependency in generic mei code This patch provides only straight forward changes FW status and prob quirks need to be handled separately Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* mei: kill error message for allocation failureTomas Winkler2014-09-29
| | | | | | | | There is no need to log memory allocation errors as this is already done by the memory subsystem. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* mei: use connect_data on the stackTomas Winkler2014-09-24
| | | | | | | | | There is no need for dynamic allocation for connect_data. We can use variable on the stack and make code less error prone and simple Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* mei: enable adding more IOCTL handlersTomas Winkler2014-09-24
| | | | | | | | Handle ioctls in a switch statement so we can add more commands easily Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* mei: add mei_me_cl_by_uuid_id functionTomas Winkler2014-09-24
| | | | | | | | | | When handling dynamic clients there might be a race scenario in which two me clients with the same me address would be linked in the me clients list, therefore we need to search by both uuid and me address. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* mei: me_client lookup function to return me_client objectTomas Winkler2014-09-24
| | | | | | | | | | | | For support of dynamic addition and removal of me clients it is more convenient to use a list instead of static array as is use now. As the first step of the transition to the new data structure we change the lookup function so it returns me client address instead of an index. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* mei: move from misc to char deviceAlexander Usyskin2014-07-09
| | | | | | | | | | | | We need to support more then one mei interface hence the simple misc devices is not longer an option In order not break the user space a device with pci function 0 need to be linked to /dev/mei Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* mei: set connecting state just upon connection request is sent to the fwAlexander Usyskin2014-05-03
| | | | | | | | | | | | | | | | | | Adding power gating introduced new waiting state for client also during connection attempt, a connection request can be queued for later either due device is power gated or due to other on going connection. We setting client connection state before start of full connect procedure so in both cased the client state will be MEI_FILE_CONNECTING which create interlock between the two connection attempts, both detecting that another connection is in progress. The interlock is resolved by moving client to connecting state only upon connection request transmission, so the first cb in queue can be processed. Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* mei: ignore client writing state during cb completionAlexander Usyskin2014-04-16
| | | | | | | | | | | | | | | | | | Ignore client writing state during cb completion to fix a memory leak. When moving cbs to the completion list we should not look at writing_state as this state can be already overwritten by next write, the fact that a cb is on the write waiting list means that it was already written to the HW and we can safely complete it. Same pays for wait in poll handler, we do not have to check the state wake is done after completion list processing. Cc: stable@vger.kernel.org Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* mei: use cl_dbg where appropriateTomas Winkler2014-03-17
| | | | | | | | | | use cl_dbg for debug log messages in cl context this also removes checkpatch warning: quoted string split across lines Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* mei: report consistently copy_from/to_user failuresAlexander Usyskin2014-03-17
| | | | | | | | | Consistently display error on possible copy_from/to_user failures use dev_dbg so it cannot be abused to flood the kernel log Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* mei: drop pr_fmt macrosTomas Winkler2014-03-17
| | | | | | | | we are using dev_ logging facility so we don't need pr_fmt macros Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Reviewed-by: Alexander Usyskin <alexander.usyskin@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* mei: make me hw headers private to me hw.Tomas Winkler2014-03-17
| | | | | | | | | Remove includes of me-hw.h and me-hw-regs.h headers from the mei generic code. The mei layer should not depend on hw specific headers Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* mei: make return values consistent across the driverAlexander Usyskin2014-02-28
| | | | | | | | | | | | 1. Propagate ENOTTY to user space if the client is not present in the system 2. Use ETIME consistently on timeouts 3. Return EIO on write failures 4. Return ENODEV on recoverable device failures such as resets Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* mei: hbm: revamp client connect and disconnection statusAlexander Usyskin2014-02-18
| | | | | | | | | | | | | | | 1. Return -ENOTTY on client connect if the requested client was not found on the enumeration list or the client was internally disabled, in the later case FW will return NOT_FOUND. 2. Return -EBUSY if the client cannot be connected because of resource contention 3. Change response status enum to have MEI_CL_ prefix 4. Add function to translate response status to a string for more readable logging Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* mei: fix syntax in comments and debug outputAlexander Usyskin2014-01-08
| | | | | | | | Fix syntax errors in comments and debug strings Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* mei: revamp open handler countsTomas Winkler2013-10-03
| | | | | | | | | | | | | | | | | | | Make open counter to be incremented and decremented from mei_cl_link and mei_cl_unlik function respectively Nfc was assuming symmetric linking API and thus open handler count was never decreased. This patch fixes that. We need to add separate open hander count for amthif which is handled out of link/unlink functions and doesn't break the symmetric API. Last we do not waste clients slots if amthif or wd are not present in the device. we don't need to allocates slots ahead it is all covered by link/unlink before the devices is responding to user space connection and thus not racing on allocation Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* mei: simplify mei_open error handlingTomas Winkler2013-10-03
| | | | | | | | | 1. Perform simple checks first and only then attempt to allocate cl structure. 2. Remove open_handler_count test, this is already checked in mei_cl_link function 3. return -EMFILE instead of -ENOENT as expected by user space Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* Merge 3.12-rc3 into char-misc-nextGreg Kroah-Hartman2013-09-29
|\ | | | | | | | | | | | | We need/want the mei fixes in here so we can apply other updates that are depending on them. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| * mei: bus: stop wait for read during cl state transitionTomas Winkler2013-09-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Bus layer omitted check for client state transition while waiting for read completion The client state transition may occur for example as result of firmware initiated reset Add mei_cl_is_transitioning wrapper to reduce the code repetition.: Cc: <stable@vger.kernel.org> # 3.9+ Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | mei: mei_release: drop redundant check if cb is NULLTomas Winkler2013-09-26
| | | | | | | | | | | | | | mei_io_cb_free follows kfree design and check for NULL internally Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | mei: revamp read and write length checksTomas Winkler2013-09-26
| | | | | | | | | | | | | | | | | | | | | | | | | | 1. Return zero on zero length read and writes 2. For a too large write return -EFBIG as defined in man write(2) EFBIG An attempt was made to write a file that exceeds the implementation-defined maximum file size or the process's file size limit, or to write at a position past the maximum allowed offset. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | mei: mei_write correct checks for copy_from_userAlexander Usyskin2013-09-26
|/ | | | | | | | | 1. return -EFUALT when copy_from_user fails 2. display error message on failure in error level Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* mei: don't get stuck in select during resetTomas Winkler2013-07-26
| | | | | | | | | | | | Clear pending connection after hw reset but before hw start and wake up the waiting task in poll. Signal POLLERR in select when device went through reset. Add wrapper mei_cl_is_connected for checking if the device and client are connected. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* mei: fix read after read scenarioTomas Winkler2013-05-30
| | | | | | | | | | mei read always has to be preceded by write but 'write write read read' scenario should work as well. In this case the offset is not zero but new read should be initiated Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* mei: deprecate the mei_wd_state_independence_msgTomas Winkler2013-05-30
| | | | | | | wd independence is deprecated, remove it. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* mei: fix out of array access to me clients arrayTomas Winkler2013-05-21
| | | | | | | | | | | The patch 9f81abdac362: "mei: implement mei_cl_connect function" from Jan 8, 2013, leads to the following static checker warning: "drivers/misc/mei/main.c:522 mei_ioctl_connect_client() warn: check 'dev->me_clients[]' for negative offsets (-2)" Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* mei: fix reading large reposnesTomas Winkler2013-04-19
| | | | | | | | | | While writting to device is limitted to max_msg_length advertized in client properites the read can be much longer delivered consequiting chunks. We use krealloc to enlarge the buffer when needed. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* mei: revamp hbm state machineTomas Winkler2013-04-19
| | | | | | | | | | | | | | | | 1. Rename init_clients_state to hbm_state and use MEI_HBM_ prefix for HBM states 2. Remove recvd_msg and use hbm state for synchronizing hbm protocol has successful start. We can wake up the hbm event from start response handler and remove the hack from the interrupt thread 3. mei_hbm_start_wait function encapsulate start completion waiting Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* mei: add mei_cl_write functionTomas Winkler2013-04-08
| | | | | | | | | consolidate write code to a specific me client in mei_cl_write function the function is called from mei device write handler and from mei_cl bus send function Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* mei: add debugfs hooksTomas Winkler2013-04-05
| | | | | | | | debugfs exposes device state and list of me clients and their properties Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* mei: bus: Call bus routines from the core codeSamuel Ortiz2013-03-29
| | | | | | | | | Register the MEI bus type against the kernel core bus APIs and call the bus Rx handler from interrupt.c Signed-off-by: Samuel Ortiz <sameo@linux.intel.com> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* mei: move mei-me to separate moduleTomas Winkler2013-03-29
| | | | | | | | | | | mei layer provides host bus message layer, client management, and os interface mei-me - provides access to ME hardware through the pci bus Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* mei: rename to mei_host_buffer_is_empty to hbuf_is_readyTomas Winkler2013-02-06
| | | | | | | | | we rename the mei_host_buffer_is_empty to keep naming convention of hbuf and also make the query more generic to be correct also for other under laying hardware Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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