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path: root/drivers/rpmsg/qcom_glink_smem.c
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2019-10-11rpmsg: glink: Set tail pointer to 0 at end of FIFOChris Lew
When wrapping around the FIFO, the remote expects the tail pointer to be reset to 0 on the edge case where the tail equals the FIFO length. Fixes: caf989c350e8 ("rpmsg: glink: Introduce glink smem based transport") Cc: stable@vger.kernel.org Signed-off-by: Chris Lew <clew@codeaurora.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2019-09-17rpmsg: glink-smem: Name the edge based on parent remoteprocBjorn Andersson
Naming the glink edge device on the parent of_node short name causes collisions when multiple remoteproc instances with only different unit address are described on the platform_bus in DeviceTree. Base the edge's name on the parent remoteproc's name instead, to ensure that it's unique. Reviewed-by: Niklas Cassel <niklas.cassel@linaro.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2018-10-03rpmsg: glink: smem: Support rx peak for size less than 4 bytesArun Kumar Neelakantam
The current rx peak function fails to read the data if size is less than 4bytes. Use memcpy_fromio to support data reads of size less than 4 bytes. Cc: stable@vger.kernel.org Fixes: f0beb4ba9b18 ("rpmsg: glink: Remove chunk size word align warning") Signed-off-by: Arun Kumar Neelakantam <aneela@codeaurora.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2018-08-27rpmsg: Convert to using %pOFn instead of device_node.nameRob Herring
In preparation to remove the node name pointer from struct device_node, convert printf users to use the %pOFn format specifier. Cc: Ohad Ben-Cohen <ohad@wizery.com> Cc: Bjorn Andersson <bjorn.andersson@linaro.org> Cc: linux-remoteproc@vger.kernel.org Signed-off-by: Rob Herring <robh@kernel.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2018-06-03rpmsg: glink: Switch to SPDX license identifierSuman Anna
Use the appropriate SPDX license identifier in various rpmsg glink driver source files and drop the previous boilerplate license text. Signed-off-by: Suman Anna <s-anna@ti.com> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2018-03-17rpmsg: glink: use put_device() if device_register failArvind Yadav
if device_register() returned an error! Always use put_device() to give up the reference initialized. And unregister device for other return error. Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2017-12-18rpmsg: glink: smem: Ensure ordering during txBjorn Andersson
Ensure the ordering of the fifo write and the update of the write index, so that the index is not updated before the data has landed in the fifo. Acked-By: Chris Lew <clew@codeaurora.org> Reported-by: Arun Kumar Neelakantam <aneela@codeaurora.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2017-12-06drivers: rpmsg: remove duplicate includesPravin Shedge
These duplicate includes have been found with scripts/checkincludes.pl but they have been removed manually to avoid removing false positives. Signed-off-by: Pravin Shedge <pravin.shedge4linux@gmail.com> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2017-08-29rpmsg: glink: Make RX FIFO peak accessor to take an offsetBjorn Andersson
To fully read the received rx data from FIFO both the command and data has to be read. Currently we read command, data separately and process them. By adding an offset parameter to RX FIFO peak accessor, command and data can be read together, simplifying things. So introduce this. Acked-by: Arun Kumar Neelakantam <aneela@codeaurora.org> Signed-off-by: Sricharan R <sricharan@codeaurora.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2017-08-29rpmsg: glink: Add support for TX intentsSricharan R
Intents are nothing but pre-allocated buffers of appropriate size that are allocated on the local side and communicated to the remote side and the remote stores the list of intent ids that it is informed. Later when remote side is intenting to send data, it picks up a right intent (based on the size) and sends the data buffer and the intent id. Local side receives the data and copies it to the local intent buffer. The whole idea is to avoid stalls on the transport for allocating memory, used for copy based transports. When the remote request to allocate buffers using CMD_RX_INTENT_REQ, we allocate buffers of requested size, store the buffer id locally and also communicate the intent id to the remote. Acked-by: Arun Kumar Neelakantam <aneela@codeaurora.org> Signed-off-by: Sricharan R <sricharan@codeaurora.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2017-08-29rpmsg: glink: Add support for transport version negotiationSricharan R
G-link supports a version number and feature flags for each transport. A combination of the version number and feature flags enable/disable: (*) G-Link software updates for each edge (*) Individual features for each edge Endpoints negotiate both the version and the supported flags when the transport is opened and they cannot be changed after negotiation has been completed. Each full implementation of G-Link must support a minimum of the current version, the previous version, and the base negotiation version called v0. Acked-by: Arun Kumar Neelakantam <aneela@codeaurora.org> Signed-off-by: Sricharan R <sricharan@codeaurora.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2017-08-29rpmsg: glink: Introduce glink smem based transportBjorn Andersson
The glink protocol supports different types of transports (shared memory). With the core protocol remaining the same, the way the transport's memory is probed and accessed is different. So add support for glink's smem based transports. Adding a new smem transport register function and the fifo accessors for the same. Acked-by: Arun Kumar Neelakantam <aneela@codeaurora.org> Signed-off-by: Sricharan R <sricharan@codeaurora.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>