- 24 May, 2015 40 commits
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Sudeep Dutt authored
The SCIF hardware bus abstracts the low level hardware driver details like interrupts and mapping remote memory so that the same SCIF driver can work without any changes with the MIC host or card driver as long as the hardware bus operations are implemented. The SCIF hardware device is registered by the host and card drivers on the SCIF hardware bus resulting in probing the SCIF driver. Reviewed-by:
Nikhil Rao <nikhil.rao@intel.com> Reviewed-by:
Ashutosh Dixit <ashutosh.dixit@intel.com> Signed-off-by:
Sudeep Dutt <sudeep.dutt@intel.com> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Sudeep Dutt authored
SCIF ring buffer is a single producer, single consumer byte stream ring buffer optimized for avoiding reads across the PCIe bus while adding the required barriers and hardware workarounds for the MIC Coprocessor. The ring buffer is used to implement a receive queue for SCIF driver messaging between two nodes and for byte stream messaging between SCIF endpoints. The existing in-kernel ring buffer was not reused since it has not been designed for our use across the PCIe bus where each node runs an independent OS. Each SCIF node has a receive queue for every other SCIF node, and each connected endpoint has a receive queue for messages from its peer. This pair of receive queues is referred to as a SCIF queue pair. Reviewed-by:
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Sudeep Dutt authored
This patch introduces the SCIF documentation in the header file and describes the IOCTL interface for user mode. mic_overview.txt is updated with documentation on SCIF and a new document describing SCIF in more details is available in scif_overview.txt. Reviewed-by:
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Ira Snyder authored
The CARMA project has ended, and the hardware has all been moved into storage. It is unlikely to ever be used again. Remove the drivers so that there is no more maintenance burden from ongoing upstream kernel changes. Signed-off-by:
Ira W. Snyder <ira.snyder@gmail.com> Signed-off-by:
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Tal Shorer authored
Remove trailing whitespace from several lines in drivers/char/misc.c This was done using scripts/cleanfile Signed-off-by:
Tal Shorer <tal.shorer@gmail.com> Signed-off-by:
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Matt Campbell authored
This patch provides support for the DS28EA00 digital thermometer. The DS28EA00 provides an additional two pins for implementing a sequence detection algorithm. This feature allows you to determine the physical location of the chip in the 1-wire bus without needing pre-existing knowledge of the bus ordering. Support is provided through the sysfs w1_seq file. The file will contain a single line with an integer value representing the device index in the bus starting at 0. Signed-off-by:
Matt Campbell <mattrcampbell@gmail.com> Acked-by:
Evgeniy Polyakov <zbr@ioremap.net> Signed-off-by:
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David Fries authored
A temperature conversion can take 750 ms and when possible the w1_therm slave driver drops the bus_mutex to allow other bus operations, but that includes operations such as a periodic slave search, which can remove this slave when it is no longer detected. If that happens the sl->family_data will be freed and set to NULL causing w1_slave_show to crash when it wakes up. Signed-off-by:
David Fries <David@Fries.net> Reported-By:
Thorsten Bschorr <thorsten@bschorr.de> Tested-by:
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Dmitry Khromov authored
Some of 1-Wire devices commonly associated with physical access control systems are attached/generate presence for as short as 100 ms - hence the tens-to-hundreds milliseconds scan intervals are required. Signed-off-by:
Dmitry Khromov <dk@icelogic.net> Acked-by:
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Krzysztof Kolasa authored
Sometimes, on x86_64, decompression fails with the following error: Decompressing Linux... Decoding failed -- System halted This condition is not needed for a 64bit kernel(from commit d5e7cafd): if( ... || (op + COPYLENGTH) > oend) goto _output_error macro LZ4_SECURE_COPY() tests op and does not copy any data when op exceeds the value. added by analogy to lz4_uncompress_unknownoutputsize(...) Signed-off-by:
Krzysztof Kolasa <kkolasa@winsoft.pl> Tested-by:
Alexander Kuleshov <kuleshovmail@gmail.com> Tested-by:
Caleb Jorden <cjorden@gmail.com> Signed-off-by:
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Richard Weinberger authored
Not all architectures have io memory. Fixes: drivers/built-in.o: In function `spmi_pmic_arb_probe': spmi-pmic-arb.c:(.text+0x1ed399): undefined reference to `devm_ioremap_resource' Signed-off-by:
Richard Weinberger <richard@nod.at> Signed-off-by:
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Stephen Hemminger authored
UIO base driver should only free_irq that it has requested. UIO supports drivers without interrupts (irq == 0) or custom handlers. This fixes warnings like: WARNING: CPU: 1 PID: 5478 at kernel/irq/manage.c:1244 __free_irq+0xa9/0x1e0() Trying to free already-free IRQ 0 Signed-off-by:
Stephen Hemminger <stephen@networkplumber.org> Signed-off-by:
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Tomas Winkler authored
Signed-off-by:
Tomas Winkler <tomas.winkler@intel.com> Signed-off-by:
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Tomas Winkler authored
Cc: Samuel Ortiz <sameo@linux.intel.com> Signed-off-by:
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Tomas Winkler authored
1. mei_nfc_hci_hdr and mei_nfc_hdr are just the same thing so drop one 2. use mei_nfc_hdr structure as the member of the command and the reply instead of replicating all header fields. 3. dump the header for easier debugging Cc: Samuel Ortiz <sameo@linux.intel.com> Signed-off-by:
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Tomas Winkler authored
since we move all nfc hanling to the mei_phy module we can kill mei_cl_ops Cc: Samuel Ortiz <sameo@linux.intel.com> Signed-off-by:
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Tomas Winkler authored
move nfc logic to mei_phy module, we prefer as much as possible not to deal with a particualr client protocol in the mei generic infrasutcutre Cc: Samuel Ortiz <sameo@linux.intel.com> Signed-off-by:
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Tomas Winkler authored
Export name and uuid via sysfs and uevent Cc: linux-api@vger.kernel.org Signed-off-by:
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Tomas Winkler authored
In order to automate modules matching add device uuid which is reported in client enumeration, keep also the name that is needed in for nfc distinguishing radio vendor Report mei:name:uuid Cc: linux-api@vger.kernel.org Cc: Samuel Ortiz <sameo@linux.intel.com> Signed-off-by:
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Tomas Winkler authored
The io callback is clear from write_waitling_list after we receive interrupt from the hw to ack the write completion. We need to wait for this interrupt deliver before we try to enter low power state Signed-off-by:
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Alexander Usyskin authored
On longer non-blocking write might not complete at the end of autosuspend expiration, therefore we request autosuspend again on the write completion. Signed-off-by:
Alexander Usyskin <alexander.usyskin@intel.com> Signed-off-by:
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Alexander Usyskin authored
Consume the write flow control on the first chunk of the write instead of on the buffer completion. We can safely assume that the consequent chunks have the flow control granted. This addresses two issues: 1. Blocks other callbacks from the same client riding on the client's flow control and prevents interleaving of messages as FW cannot distinguish between two messages from the same client. 2. Fixes single buffer flow control arbitration in a clean way, without connection/disconnection book keeping Signed-off-by:
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Alexander Usyskin authored
Add client info to debug prints in the read function to ease on debugging efforts. Signed-off-by:
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Tomas Winkler authored
Remove spurious blank Signed-off-by:
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Alexander Usyskin authored
We can receive mtu with one call now, no need to store it. Signed-off-by:
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Alexander Usyskin authored
This should be used for debug only. The feaure is gated by "allow_fixed_address" control exposed in debugfs. Signed-off-by:
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Alexander Usyskin authored
Fixed address is simplified FW client that doesn't require connection and doesn't support flow control. So it can be only one host client per fixed FW client. Fixed client access is available only for drivers on mei bus, connection from user-space is blocked. Signed-off-by:
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Alexander Usyskin authored
For ME clients that use single receiving buffer the driver tracks credentials on mei_me_clients structure for all connections. The driver needs to book keep the shared resource correctly and track the connections, particularly the credit has to be cleaned when there is no active connection to a particular me client. This solves issue when subsequent connection will not get an ill impression that it can write. We add active connection counter the particular ME client and when the counter reach zero, we clear the credits. Signed-off-by:
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Alexander Usyskin authored
Keep a pointer to associated me client in the host client object to eliminate me client searches. Check if the me client is active in the firmware by checking if its is linked on the me clients list Add accessors for the me client properties from host client. Signed-off-by:
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Tomas Winkler authored
Simplify connect state machine by changing the logic around Connection request in progress - only check if we have a callback in relevant queue. Extract common code into mei_cl_send_connect() function Signed-off-by:
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Tomas Winkler authored
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:
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Tomas Winkler authored
HW has to be in known state before the initialisation sequence is started. The polling step for settling aliveness was set to 200ms while in practise this can be done in up to 30msecs. Cc: <stable@vger.kernel.org> #3.18+ Signed-off-by:
Barak Yoresh <barak.yoresh@intel.com> Signed-off-by:
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Pratik Patel authored
This driver manages Qualcomm CoreSight Replicator device, which resides on the AMBA bus. Replicator has been made programmable to allow software to turn of the replicator branch to sink that is not being used. This avoids trace traffic to the unused/non-current sink from causing back pressure that results in overflows at the source. Signed-off-by:
Pratik Patel <pratikp@codeaurora.org> Signed-off-by:
Ivan T. Ivanov <ivan.ivanov@linaro.org> Signed-off-by:
Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by:
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Pankaj Dubey authored
fixes obvious typo in of_coresight.c %s/non-configuable/non-configurable Signed-off-by:
Pankaj Dubey <pankaj.dubey@samsung.com> Signed-off-by:
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Linus Walleij authored
Put in a blurb in the device tree bindings indicating that coresight blocks may have an optional ATCLK. Signed-off-by:
Linus Walleij <linus.walleij@linaro.org> Signed-off-by:
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Linus Walleij authored
As can be seen from the datasheet of the CoreSight Components, DDI0314 table A-4 the funnel has a clock signal apart from the AHB interconnect ("amba_pclk", that we're already handling) called ATCLK, ARM Trace Clock, that SoC implementers may provide from an entirely different clock source. So to model this correctly create an optional path for handling ATCLK alongside the PCLK so we don't break old platforms that only define PCLK ("amba_pclk") but still makes it possible for SoCs that have both clock signals (such as the DB8500) to fetch and prepare/enable/disable/ unprepare both clocks. The ATCLK is enabled and disabled using the runtime PM callbacks. As the replicator is a platform device, the code is a bit different from the other CoreSight components and the bus core does not activate runtime PM by default, so we need a few extra calls. Reviewed-by:Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by:
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Linus Walleij authored
As can be seen from the datasheet of the CoreSight Components, DDI0314 table A-6 the funnel has a clock signal apart from the AHB interconnect ("amba_pclk", that we're already handling) called ATCLK, ARM Trace Clock, that SoC implementers may provide from an entirely different clock source. So to model this correctly create an optional path for handling ATCLK alongside the PCLK so we don't break old platforms that only define PCLK ("amba_pclk") but still makes it possible for SoCs that have both clock signals (such as the DB8500) to fetch and prepare/enable/disable/ unprepare both clocks. The ATCLK is enabled and disabled using the runtime PM callbacks. Reviewed-by: -
Linus Walleij authored
As can be seen from the datasheet of the CoreSight Components, DDI0314 table A-8 the ETB has a clock signal apart from the AHB interconnect ("amba_pclk", that we're already handling) called ATCLK, ARM Trace Clock, that SoC implementers may provide from an entirely different clock source. So to model this correctly create an optional path for handling ATCLK alongside the PCLK so we don't break old platforms that only define PCLK ("amba_pclk") but still makes it possible for SoCs that have both clock signals (such as the DB8500) to fetch and prepare/enable/disable/ unprepare both clocks. The ATCLK is enabled and disabled using the runtime PM callbacks. Reviewed-by: -
Linus Walleij authored
As can be seen from the datasheet of the CoreSight Components, DDI0314H page A-19 the TPIU has a clock signal apart from the AHB interconnect ("amba_pclk", that we're already handling) called ATCLK, ARM Trace Clock, that SoC implementers may provide from an entirely different clock source. So to model this correctly create an optional path for handling ATCLK alongside the PCLK so we don't break old platforms that only define PCLK ("amba_pclk") but still makes it possible for SoCs that have both clock signals (such as the DB8500) to fetch and prepare/enable/disable/ unprepare both clocks in conjunction. The ATCLK is enabled and disabled using the runtime PM callbacks. Reviewed-by: -
Linus Walleij authored
As can be seen from the datasheet of the CoreSight Components, DDI0401C A.1.1 the ETM has a clock signal apart from the AHB interconnect ("amba_pclk", that we're already handling) called ATCLK, ARM Trace Clock, that SoC implementers may provide from an entirely different clock source. So to model this correctly create an optional path for handling ATCLK alongside the PCLK so we don't break old platforms that only define PCLK ("amba_pclk") but still makes it possible for SoCs that have both clock signals (such as the DB8500) to fetch and prepare/enable/disable/ unprepare both clocks. The ATCLK is enabled and disabled using the runtime PM callbacks. Reviewed-by: -
Linus Walleij authored
This uses runtime PM to manage the PCLK ("amba_pclk") instead of screwing around with the framework by going in and taking a copy from the amba device. The amba bus core will unprepare and disable the clock when the device is unused when CONFIG_PM is selected, else the clock will be always on. Prior to this patch, as the AMBA primecell bus code enables the PCLK, it would be left on after probe as the clk_prepare_enable() and clk_disable_unprepare() was called and thus just increase and decreas the refcount by one, without it reaching zero and actually disabling the clock. Now the runtime PM callbacks will make sure the PCLK is properly disabled after probe. Reviewed-by:
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