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2022-09-12mei: gsc: setup gsc extended operational memoryTomas Winkler1-0/+17
1. Retrieve extended operational memory physical pointers from the auxiliary device info. 2. Setup memory registers. 3. Notify firmware that the memory is ready by sending the memory ready command. 4. Disable PXP device if GSC is not in PXP mode. CC: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com> Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com> Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20220907215113.1596567-12-tomas.winkler@intel.com Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
2022-09-12mei: extend timeouts on slow devicesAlexander Usyskin1-1/+17
Parametrize operational timeouts in order to support slow firmware on some graphics devices. Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com> Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20220907215113.1596567-9-tomas.winkler@intel.com Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
2021-07-29mei: constify passed buffers and structuresKrzysztof Kozlowski1-1/+1
Buffers and structures passed to MEI bus and client API can be made const for safer code and clear indication that it is not modified. Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com> Link: https://lore.kernel.org/r/20210729102803.46289-1-krzysztof.kozlowski@canonical.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-02-06mei: implement client dma setup.Alexander Usyskin1-0/+15
Implement HBM message protocol to setup and tear down DMA buffer on behalf of an client. On top there DMA buffer allocation and its life time management. Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Link: https://lore.kernel.org/r/20210206144325.25682-5-tomas.winkler@intel.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-02-06mei: add support for client dma capabilityAlexander Usyskin1-0/+2
Client DMA capability indicates whether the firmware supports setting up a direct DMA channel between the host and me client. The DMA capabilities are supported from firmware HBM version 2.2 and newer. Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Link: https://lore.kernel.org/r/20210206144325.25682-3-tomas.winkler@intel.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-02-06mei: allow clients on bus to communicate in remove callbackAlexander Usyskin1-0/+1
Introduce new intermediate state to allow the clients on the bus to communicate with the firmware from the remove handler. This is to enable to perform a clean shutdown. Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Link: https://lore.kernel.org/r/20210206144325.25682-2-tomas.winkler@intel.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-12-07mei: bus: add vtag supportAlexander Usyskin1-2/+2
Add API to support vtag in communication on mei bus. Add mei_cldev_send_vtag, mei_cldev_recv_vtag and mei_cldev_recv_nonblock_vtag functions to allow sending a message with vtag set and to receive vtag of an incoming message. Cc: Sean Z Huang <sean.z.huang@intel.com> Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Link: https://lore.kernel.org/r/20201116125612.1660971-1-tomas.winkler@intel.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-08-18mei: add a vtag map for each clientAlexander Usyskin1-0/+17
Vtag map is a list of tuples of vtag and file pointer (struct mei_cl_vtag) associated with a particular me host client. Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Link: https://lore.kernel.org/r/20200818115147.2567012-8-tomas.winkler@intel.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-08-18mei: add a spin lock to protect rd_completed queueAlexander Usyskin1-0/+2
In order to support vtags we need to access read completed queue out of driver big lock. Add a spin lock to protect rd_completed queue. Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Link: https://lore.kernel.org/r/20200818115147.2567012-7-tomas.winkler@intel.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-08-18mei: add support for mei extended header.Tomas Winkler1-3/+8
Add an extend header beyond existing 4 bytes of the mei message header. The extension is of variable length, starting with meta header that contains the number of headers and the overall size of the extended headers excluding meta header itself followed by TLV list of extended headers. Currently only supported extension is the vtag. From the HW perspective the extended headers is already part of the payload. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com> Link: https://lore.kernel.org/r/20200818115147.2567012-5-tomas.winkler@intel.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-08-18mei: restrict vtag support to hbm version 2.2Alexander Usyskin1-0/+2
The vtag allows partitioning the mei messages into virtual groups/channels. Vtags are supported for firmwares with HBM version 2.2 and newer and only when a firmware confirms the support via capability handshake. This change only define vtag restrictions in order to make the series bisectable. Everything will be enabled when driver HBM version is set to 2.2. Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Link: https://lore.kernel.org/r/20200818115147.2567012-3-tomas.winkler@intel.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-08-18mei: hbm: add capabilities messageAlexander Usyskin1-0/+2
The new capabilities command in HBM version 2.2 allows performing capabilities handshake between the firmware and the host driver. The driver requests a capability by setting the appropriate bit in 24bit wide bitmask and the fw responses with the bit set providing the requested capability is supported. Bump copyright year in affected files. Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Link: https://lore.kernel.org/r/20200818115147.2567012-2-tomas.winkler@intel.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-07-29mei: add device kind to sysfsAlexander Usyskin1-0/+4
Some of the mei device heads are not generic and have a specific purpose, we need to announce it to the user space so it is possible to detect the correct device node via matching attributes. Generic heads are marked as 'mei' while special purpose heads have their own names. Currently we are adding 'itouch' string for Intel IPTS 1.0, 2.0 devices. This is done via new sysfs attribute 'kind'. Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Link: https://lore.kernel.org/r/20200728192242.3117779-1-tomas.winkler@intel.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-03-18misc: Replace zero-length array with flexible-array memberGustavo A. R. Silva1-1/+1
The current codebase makes use of the zero-length array language extension to the C90 standard, but the preferred mechanism to declare variable-length types such as these ones is a flexible array member[1][2], introduced in C99: struct foo { int stuff; struct boo array[]; }; By making use of the mechanism above, we will get a compiler warning in case the flexible array does not occur last in the structure, which will help us prevent some kind of undefined behavior bugs from being inadvertently introduced[3] to the codebase from now on. Also, notice that, dynamic memory allocations won't be affected by this change: "Flexible array members have incomplete type, and so the sizeof operator may not be applied. As a quirk of the original implementation of zero-length arrays, sizeof evaluates to zero."[1] This issue was found with the help of Coccinelle. [1] https://gcc.gnu.org/onlinedocs/gcc/Zero-Length.html [2] https://github.com/KSPP/linux/issues/21 [3] commit 76497732932f ("cxgb3/l2t: Fix undefined behaviour") Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com> Acked-by: Dimitri Sivanich <sivanich@hpe.com> Link: https://lore.kernel.org/r/20200226222240.GA14474@embeddedor Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-11-07mei: add trc detection register to sysfsAlexander Usyskin1-0/+10
The glitch detection HW (TRC) save it status information into TRC status register. Make it available to user-space via read-only sysfs file. The TRC register is availab for PCH15 gen and newer, for older platforms reading the sysfs file will fail with EOPNOTSUPP. Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Link: https://lore.kernel.org/r/20191107104445.19101-1-tomas.winkler@intel.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-11-07mei: abstract fw status register read.Tomas Winkler1-4/+4
This is to allow working with mei devices embedded within another pci device, where mei device is represented as a platform child device and fw status registers are not necessarily resident in the device pci config space. Bump the copyright year to 2019 on the modified files. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Link: https://lore.kernel.org/r/20191106223841.15802-4-tomas.winkler@intel.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-10-04mei: avoid FW version request on Ibex Peak and earlierAlexander Usyskin1-0/+4
The fixed MKHI client on PCH 6 gen platforms does not support fw version retrieval. The error is not fatal, but it fills up the kernel logs and slows down the driver start. This patch disables requesting FW version on GEN6 and earlier platforms. Fixes warning: [ 15.964298] mei mei::55213584-9a29-4916-badf-0fb7ed682aeb:01: Could not read FW version [ 15.964301] mei mei::55213584-9a29-4916-badf-0fb7ed682aeb:01: version command failed -5 Cc: <stable@vger.kernel.org> +v4.18 Cc: Paul Menzel <pmenzel@molgen.mpg.de> Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Link: https://lore.kernel.org/r/20191004181722.31374-1-tomas.winkler@intel.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-06-18mei: no need to check return value of debugfs_create functionsGreg Kroah-Hartman1-5/+2
When calling debugfs functions, there is no need to ever check the return value. The function can work or not, but the code logic should never do something different based on this. Cc: Tomas Winkler <tomas.winkler@intel.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: linux-kernel@vger.kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-04-25mei: expose device state in sysfsAlexander Usyskin1-1/+2
Expose mei device state to user-space through sysfs. This gives indication to applications that driver is in transition, usefully mostly to detect link reset state. 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>
2019-03-28mei: adjust the copyright notice in the files.Tomas Winkler1-1/+1
Use unified version of the copyright notice in the files Update copyright years according the year the files were touched, except this patch and SPDX conversions. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-03-28mei: convert to SPDX license tagsTomas Winkler1-11/+1
Replace boiler plate licenses texts with the SPDX license identifiers in the mei files header. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-11-26mei: dma ring: implement transmit flowTomas Winkler1-0/+2
Implement a circular buffer on allocated system memory. Read and write indices are stored on the control block which is also shared between the device and the host. Two new functions are exported from the DMA module: mei_dma_ring_write, and mei_dma_ring_empty_slots. The former simply copy a packet on the TX DMA circular buffer and later, returns the number of empty slots on the TX DMA circular buffer. 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>
2018-11-26mei: dma ring: implement rx circular buffer logicTomas Winkler1-1/+2
Implement circular buffer protocol over receive dma buffer. Add extension to the mei message header that holds length of the buffer on the dma buffer. 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>
2018-11-26mei: hw: add dma ring control blockTomas Winkler1-0/+1
The DMA ring control block contains write and read indices for host and device circular buffers. 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>
2018-11-26mei: dma ring buffers allocationTomas Winkler1-0/+20
Allocate DMA ring buffers from managed coherent memory. 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>
2018-08-02mei: restrict dma ring support to hbm version 2.1Tomas Winkler1-0/+2
Only a firmware with version 2.1 and above supports dma ring feature. 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>
2018-08-02mei: hbm: introduce dma bit in the message headerTomas Winkler1-2/+2
Add dma_ring bit in the mei message header for conveying that the message data itself are on the dma ring. 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>
2018-08-02mei: add support for variable length mei headers.Tomas Winkler1-6/+19
Remove header size knowledge from me and txe hw layers, this requires to change the write handler to accept header and its length as well as data and its length. HBM messages are fixed to use basic header, hence we add mei_hbm2slots() that converts HBM message length and mei message header, while mei_data2slots() converts data length directly to the slots. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-07-24mei: add mei_msg_hdr_init wrapper.Tomas Winkler1-2/+0
Wrap the mei header boilerplate initialization code in mei_msg_hdr_init function. On the way remove 'completed' field from mei_cl_cb structure as this information is already included in the header and is local to particular fragment. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-07-24mei: move hbuf_depth from the mei device to the hw modulesTomas Winkler1-7/+4
The host buffer depth is hardware specific so it's better to handle it inside the me and txe hw modules. In me the depth is read from register in txe it's a constant number. The value is now retrieved via mei_hbuf_depth accessor, while it replaces mei_hbuf_max_len. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-07-24mei: cleanup slots to data conversionsTomas Winkler1-3/+5
Cleanup conversions between slots and data. Define MEI_SLOT_SIZE instead of using 4 or sizeof(u32) across the source code. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-07-03mei: expose fw version to sysfsAlexander Usyskin1-1/+24
The ME FW version is constantly used by detection and update tools. To improve the reliability and simplify these tools provide a sysfs interface to access version of the platform ME firmware in the following format: <platform>:<major>.<minor>.<milestone>.<build>. There can be up to three such blocks for different FW components. 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>
2018-07-03mei: add optional timeout to internal bus recvAlexander Usyskin1-1/+1
Add optional timeout to internal bus recv function to enable break out of internal flows in case of no answer from FW. 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>
2018-03-14mei: limit the number of queued writesAlexander Usyskin1-0/+8
Limit the number of queued writes per client. Writes above this threshold are blocked till place in the transmit queue is available. The limit is configurable via sysfs and defaults to 50. The implementation should provide blocking I/O behavior. Prior to this change one would end up in the hands of OOM. 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>
2018-03-14mei: make module referencing local to the bus.cTomas Winkler1-2/+0
Module reference counting is relevant only to the mei client devices. Make the implementation clean and move it to bus.c Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-05-25mei: make mei_cl_bus_rescan staticAlexander Usyskin1-1/+0
mei_cl_bus_rescan is used only in bus.c, so make it local to the file and mark static. 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>
2017-04-08mei: drop amthif internal clientAlexander Usyskin1-51/+0
AMTHIF has special support in the mei drive, it handles multiplexing multiple user space connection above single me client connection. Since there is no additional addressing information there is a strict requirement on the traffic order on each connection and on the "read after write" order within the connection. This creates a lot of complexity mostly because the other client types do not necessarily fall under the same restriction. After carefully studying the use of the AMTHIF client, we came to conclusion that the multiplexing is not really utilized by any application and we may safely remove that support and significantly simplify the driver. 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>
2017-01-31mei: replace callback structures used as list head by list_headAlexander Usyskin1-10/+10
mei_dev structure used struct mei_cl_cb type variables as for holding callbacks list heads. Replace them by the actual struct list_head as there is no other info that is handled. This slims down the mei_dev structure and mostly streamline the 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>
2017-01-31mei: bus: prevent hardware module unload if device on bus is activeAlexander Usyskin1-0/+2
The hardware module should not be unloaded if the bus has active devices. Get get_/put_ bus parent module upon client device connection/disconnection, to prevent the hardware managing module to disappear underneath. 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>
2017-01-11mei: bus: enable OS version only for SPT and newerAlexander Usyskin1-0/+2
Sending OS version for support of TPM2_ChangeEPS() is required only for SPT FW (HMB version 2.0) and newer. On older platforms the command should be just ignored by the firmware but some older platforms misbehave so it's safer to send the command only if required. Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=192051 Fixes: 7279b238bade (mei: send OS type to the FW) Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Tested-by: Jan Niehusmann <jan@gondor.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-12-06mei: bus: enable non-blocking RXAlexander Usyskin1-1/+6
Enable non-blocking receive for drivers on mei bus, this allows checking for data availability by mei client drivers. This is most effective for fixed address clients, that lacks flow control. This function adds new API function mei_cldev_recv_nonblock(), it retuns -EGAIN if function will block. 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>
2016-12-06mei: synchronize irq before initiating a reset.Tomas Winkler1-1/+7
We need to synchronize irqs before issuing reset to make sure that the clients communication is concluded and doesn't leak to the reset flow and confusing the state machine. This issue is happening during suspend/resume stress testing. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-11-17mei: introduce host client uninitialized stateAlexander Usyskin1-1/+2
Introduce a new host client state, MEI_FILE_UNINITIALIZED, to distinguish client objects that was unlinked, but not destroyed and can be linked again. 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>
2016-11-15mei: constify buffer in the write functions callsTomas Winkler1-3/+2
The write buffer should not by modified so make it constant. Also hitchhike some style fixes on the way in the interface and rename mei_me_write_message to mei_me_hbuf_write for consistency. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-11-10mei: enable to set the internal flag for client writeAlexander Usyskin1-1/+14
Prepare the client write functions to set the internal flag in message header. Carry both blocking and internal modes inside the transmit cb, and call internal bus function __mei_cl_send() with send mode bit mask. The Internal flag should be added only on messages generated by the driver. 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>
2016-09-27mei: stop the stall timer worker if not neededAlexander Usyskin1-0/+1
The stall timer worker checks periodically if there is a stalled i/o transaction. The issue with the current implementation is that the timer is ticking also when there is no pending i/o transaction. This patch provides a simple change that prevents rescheduling of the delayed work when there is no pending i/o. Cc: Andy Lutomirski <luto@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>
2016-08-30mei: drop unused file transaction statesAlexander Usyskin1-3/+0
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>
2016-08-30mei: amthif: drop mei_amthif_readAlexander Usyskin1-3/+0
mei_amthif_read have only one difference from mei_read, it is not calling mei_read_start(). Make mei_read_start return immediately for amthif client and drop the special mei_amthif_read function. 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>
2016-08-30mei: use consistent naming for TX control flow creditsTomas Winkler1-4/+4
With the introduction of the receive control flow credits prefixed with rx_ we add tx_ prefix to the variables and function used for tracking the transmit control flow credits. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-08-30mei: rx flow control counterAlexander Usyskin1-2/+2
Use RX flow control counter in the host client structure to track the number of simultaneous outstanding reads. This eliminates search in queues and makes ground for enabling for parallel read. 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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