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path: root/drivers/rpmsg/qcom_glink_rpm.c
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2018-06-04rpmsg: glink: Switch to SPDX license identifierSuman Anna1-9/+1
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>
2017-08-30rpmsg: glink: Make RX FIFO peak accessor to take an offsetBjorn Andersson1-1/+4
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>
2017-08-30rpmsg: glink: Add support for TX intentsSricharan R1-1/+2
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>
2017-08-30rpmsg: glink: Add support for transport version negotiationSricharan R1-1/+3
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>
2017-08-30rpmsg: glink: Allow unaligned data accessBjorn Andersson1-1/+21
Glink protocol requires that each message is aligned on a 8 byte offset. This is purely a restriction from glink, so in order to support clients which do not adher to this, allow data packets of any size, but align the head index accordingly, effectively removing the alignment restriction. 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>
2017-08-30rpmsg: glink: Move the common glink protocol implementation to glink_native.cBjorn Andersson1-992/+3
Move the common part of glink core protocol implementation to glink_native.c that can be shared with the smem based glink transport in the later patches. 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>
2017-08-30rpmsg: glink: Split rpm_probe to reuse the common codeBjorn Andersson1-36/+49
There is quite some code common in glink_rpm_probe that can reused for glink-smem based transport as well. So split the function and move the code to glink_native_probe that can be used later when we add the support for glink-smem based transport. Also reuse driver's remove as well. 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>
2017-08-30rpmsg: glink: Associate indirections for pipe fifo accessor'sBjorn Andersson1-38/+106
With the intention of reusing the glink core protocol commands and code across both rpm and smem based transports, the only thing different is way of accessing the shared-memory of the transport (FIFO). So put the fifo accessor's of the transport's pipe (rx/tx) behind indirections, so that the rest of the code can be shared. For this, have a qcom_glink_pipe that can be used in the common code containing the indirections and wrap it with glink_rpm_pipe that contains the transport specific members. 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>
2017-08-30rpmsg: glink: Rename glink_rpm_xx functions to qcom_glink_xxBjorn Andersson1-120/+128
Renaming the glink_rpm_xx functions and structs to qcom_glink_xx equivalents helps to reuse the core glink protocol while adding support for smem based glink transport in the later patches. 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>
2017-05-31rpmsg: Introduce Qualcomm RPM glink driverBjorn Andersson1-0/+1233
This introduces a basic driver for communicating over "native glink" with the RPM found in Qualcomm platforms. Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>