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path: root/drivers/misc/mei/mei_dev.h
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* mei: revamp client disconnection flowTomas Winkler2015-05-24
| | | | | | | | | | | | | Split disconnected state into two parts first reception disconnect response from the firmware and second actually setting of disconnected state. Book keeping data are needed for processing and after firmware disconnected the client and are cleaned when setting the disconnected state in mei_cl_set_disconneted() function. Add mei_cl_send_disconnect to reduce code duplication. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Alexander Usyskin <alexander.usyskin@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: 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 regular client read functionsTomas Winkler2015-03-01
| | | | | | | | | | | Reduce code duplication in amthif by reusing regular client read functions. The change also removes the need for amthif own buffering 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: iamthif: send flow control as a regular clientTomas Winkler2015-03-01
| | | | | | | | | | Reuse common client mechanism for sending flow control hbm message. Add new function mei_amthif_read_start similar to mei_cl_read_start that puts control flow request onto the control write queue and drop mei_amthif_irq_read function Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* mei: iamthif: remove useless iamthif_ioctl variableTomas Winkler2015-03-01
| | | | | | | | iamthif_ioctl is obsolete and can be safely dropped Currently it is set to true during driver runtime Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* mei: iamthif: fix device reset on mei_amthif_irq_read_msgTomas Winkler2015-03-01
| | | | | | | | | | | On failure mei_amthif_irq_read_msg returns an error that will cause device reset but the issue is software one so instead we should propagate error to caller and just clean the read queues. As a side effect also removes useless BUG_ONs 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>
* mei: revamp me clients list handlingTomas Winkler2015-03-01
| | | | | | | | | | | | 1. Use rw lock to access the me_clients list 2. Reuse already defined find functions also when removing particular me client 3. Add wrappers for addition and deletion Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* 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: bus: use ssize_t as the return type for send and receiveTomas Winkler2015-01-12
| | | | | | | | | Mei bus receive and send function may return either number of transmitted bytes or errno. It is better to use ssize_t type for that purpose that mixing size_t with int. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* Merge tag 'char-misc-3.19-rc1' of ↵Linus Torvalds2014-12-14
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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 update for 3.19-rc1 Lots of little things all over the place in different drivers, and a new subsystem, "coresight" has been added. Full details are in the shortlog" * tag 'char-misc-3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (73 commits) parport: parport_pc, do not remove parent devices early spmi: Remove shutdown/suspend/resume kernel-doc carma-fpga-program: drop videobuf dependency carma-fpga: drop videobuf dependency carma-fpga-program.c: fix compile errors i8k: Fix temperature bug handling in i8k_get_temp() cxl: Name interrupts in /proc/interrupt CXL: Return error to PSL if IRQ demultiplexing fails & print clearer warning coresight-replicator: remove .owner field for driver coresight: fixed comments in coresight.h coresight: fix typo in comment in coresight-priv.h coresight: bindings for coresight drivers coresight: Adding ABI documentation w1: support auto-load of w1_bq27000 module. w1: avoid potential u16 overflow cn: verify msg->len before making callback mei: export fw status registers through sysfs mei: read and print all six FW status registers mei: txe: add cherrytrail device id mei: kill cached host and me csr values ...
| * mei: read and print all six FW status registersAlexander Usyskin2014-11-26
| | | | | | | | | | | | | | | | | | ME devices prior to PCH8 (Lynx Point) have two FW status registers, on PCH8 and newer excluding txe there are six FW status registers. 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: nfc: clean nfc internal struct on host exitTomas Winkler2014-11-07
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | NFC internal structure cleaning was dropped by commit commit 487056932d372cc4f6c636f21a928d6667b151d7 Author: Tomas Winkler <tomas.winkler@intel.com> Date: Mon Feb 17 15:13:19 2014 +0200 mei: Remove all bus devices from the mei_dev list when stopping the MEI When stopping the MEI, we should remove and potentially unregister all bus devices queued on the mei_dev linked list. We allocate nfc_dev and free it across the reset so we do not keep it in dirty state Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | misc / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PMRafael J. Wysocki2014-12-04
|/ | | | | | | | | | | | | After commit b2b49ccbdd54 (PM: Kconfig: Set PM_RUNTIME if PM_SLEEP is selected) PM_RUNTIME is always set if PM is set, so #ifdef blocks depending on CONFIG_PM_RUNTIME may now be changed to depend on CONFIG_PM. Replace CONFIG_PM_RUNTIME with CONFIG_PM everywhere under drivers/misc/. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* mei: fix kernel-doc warningsAlexander Usyskin2014-09-29
| | | | | | | | Add missed parameters descriptions and return values descriptions 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 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: drop me_client_presentation_numAlexander Usyskin2014-09-29
| | | | | | | | | me_client_presentation_num field is not used for any particular purpose now, so it can be safely dropped. 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: push pci cfg structure me hwTomas Winkler2014-09-29
| | | | | | | | Device specific configurations are currently only needed by me hw so we can remove it from txe Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* mei: remove the reference to pdev from mei_deviceTomas Winkler2014-09-29
| | | | | | | | For purpose of adding testing HW we would like to get rid of pci dependency in generic mei code. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* mei: move fw_status back to hw ops handlersTomas Winkler2014-09-29
| | | | | | | | fw status retrieval has pci specific implementation so we push it back to the hw layer Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* mei: push all standard settings into mei_device_initTomas Winkler2014-09-29
| | | | | | | | | | | Setting of hw_ops and device has should be in mei_device_init. We add reference to the parent device and remove pci dependent cfg Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* mei: add hbm and pg state in devstate debugfs printAlexander Usyskin2014-09-29
| | | | | | | | | Add hbm state, pg enablement and state to devstate file in debugfs (<debugfs>/mei/devstate) 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: extract supported features from the hbm versionTomas Winkler2014-09-24
| | | | | | | extract supported hbm features and commands from the hbm version Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* mei: wait for hbm start non-interruptibleAlexander Usyskin2014-09-24
| | | | | | | | | | | | | | We cannot handle user interrupt in context of hbm start so we only wait for time out which is reasonably short. 1. Add kdoc 2. Rename state to better reflect its function 3. Simplify wait condition and rename wait_recvd_msg to wait_hbm_start 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 disconnect name consistentlyTomas Winkler2014-09-24
| | | | | | | | | Rename mei_cl_irq_close to mei_cl_irq_disconnect and MEI_FOP_CLOSE to MEI_FOP_DISCONNECT Remove unused MEI_FOP_OPEN 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: use list for me clients book keepingTomas Winkler2014-09-24
| | | | | | | | | To support dynamic addition/remove of clients it is more convenient to use list instead of static array Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* mei: drop unused hw dependent fw status functionsAlexander Usyskin2014-07-22
| | | | | | | | | | | | We introduced unified FW status function in patch mei: add per device configuration (lkml.org/lkml/2014/5/12/607) This change made hw_ops functions unused and obsolete therefore we remove these functions from source code. 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: 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: me: move probe quirk to cfg structureTomas Winkler2014-05-27
| | | | | | | | Move quirk FW type detector to cfg structure 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: add per device configurationAlexander Usyskin2014-05-27
| | | | | | | | | | Add mei_cfg structure that holds per device configuration data and hooks, as the first step we add firmware status register offsets 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: extract fw status registersAlexander Usyskin2014-05-03
| | | | | | | | | Fetch FW status registers, as they are important in in understanding of FW reset reasons 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: me: use runtime PG pm domain for non wakeable devicesTomas Winkler2014-05-03
| | | | | | | | | | | For non wakeable devices we can't use pci runtime framework as we are not able to wakeup from D3 states. Instead we create new pg runtime domain that only drives ME power gating protocol to reduce the power consumption. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* mei: add function to check write queuesTomas Winkler2014-05-03
| | | | | | | | | The driver needs to check whether the write queue idle before entering power gating Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* mei: expose hardware power gating state to mei layerTomas Winkler2014-05-03
| | | | | | | | | | | | | | | | | | Since the runtime pm and the internal power gating cannot be in complete sync in regards to I/O operations, we need to expose the device hardware internal power gating state to mei layer 2. We add pg_state handler that translate the hw internal pg state to mei layer 2. We add power gating event variable to keep power track of power gating transitions Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com> Reviewed-by: Alexander Usyskin <alexander.usyskin@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* mei: condition PGI support on HW and HBM versionTomas Winkler2014-05-03
| | | | | | | | | | | | | Enable power gating isolation only if hw and fw support it. This is indicated by ME_PGIC_HRA bit in ME_CSR_HA register and on HBM protocol version. The information is exported to MEI layer through new pg_is_enabled hw op. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* mei: implement power gating isolation hbm layerTomas Winkler2014-05-03
| | | | | | | | | | | | Add send message functions and receive dispatch stubs for power gating isolation hbm protocol. The protocol consist of requests for entering and exiting the power gating isolation state and their responses. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* mei: fix Unnecessary space after function pointer nameTomas Winkler2014-03-17
| | | | | | | | Fix checkpatch warining: Unnecessary space after function pointer name Signed-off-by: Tomas Winkler <tomas.winkler@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: revamp writing slot countingTomas Winkler2014-02-28
| | | | | | | | | | Since txe use doorbell and not circular buffer we have to cheat in write slot counting, txe always consume all the slots upon write. In order for it to work we need to track slots using mei_hbuf_empty_slots() instead of tracking it in mei layer Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* mei: add mei_hbuf_acquire wrapperTomas Winkler2014-02-28
| | | | | | | | | | | | A client has to acquire host buffer before writing, we add lock like wrapper to replace the code snippet if (dev->hbuf_is_ready) dev->hbuf_is_ready = false; Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* mei: wd and amthif use mei_cl_ api for dis/connectionTomas Winkler2014-02-18
| | | | | | | | | | | | | Connect wd and amthif through regular mei_cl_connect API as there is no reason to connect in asynchronous mode. Also use mei_cl_is_connected in order to protect flows instead of depending on wd_pending and amthif_timer Now we can remove all the special handling in hbm layer Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* mei: Remove all bus devices from the mei_dev list when stopping the MEITomas Winkler2014-02-18
| | | | | | | | When stopping the MEI, we should remove and potentially unregister all bus devices queued on the mei_dev linked list. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* mei: get rid of ext_msgTomas Winkler2014-02-14
| | | | | | | | Use more standard message writing for oob data. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* mei: rename MEI_FOP_IOCTL to MEI_FOP_CONNECTTomas Winkler2014-02-14
| | | | | | | | This operation actually only support connection and not a generic ioctl Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* mei: limit the number of consecutive resetsTomas Winkler2014-01-13
| | | | | | | | give up reseting after 3 unsuccessful tries Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* mei: revamp mei reset state machineTomas Winkler2014-01-13
| | | | | | | | | | | | | | | | | | | | | 1. MEI_DEV_RESETTING device state spans only hardware reset flow while starting dev state is saved into a local variable for further reference, this let us to reduce big if statements in case we are trying to avoid nested resets 2. During initializations if the reset ended in MEI_DEV_DISABLED device state we bail out with -ENODEV 3. Remove redundant interrupts_enabled parameter as this can be deduced from the starting dev_state 4. mei_reset propagates error code to the caller 5. Add mei_restart function to wrap the pci resume Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Alexander Usyskin <alexander.usyskin@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>
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