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path: root/drivers/slimbus/qcom-ngd-ctrl.c
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2021-08-13slimbus: ngd: reset dma setup during runtime pmSrinivas Kandagatla
During suspend/resume NGD remote instance is power cycled along with remotely controlled bam dma engine. So Reset the dma configuration during this suspend resume path so that we are not dealing with any stale dma setup. Without this transactions timeout after first suspend resume path. Fixes: 917809e2280b ("slimbus: ngd: Add qcom SLIMBus NGD driver") Cc: <stable@vger.kernel.org> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Link: https://lore.kernel.org/r/20210809082428.11236-5-srinivas.kandagatla@linaro.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-08-13slimbus: ngd: set correct device for pmSrinivas Kandagatla
For some reason we ended up using wrong device in some places for pm_runtime calls. Fix this so that NGG driver can do runtime pm correctly. Fixes: 917809e2280b ("slimbus: ngd: Add qcom SLIMBus NGD driver") Cc: <stable@vger.kernel.org> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Link: https://lore.kernel.org/r/20210809082428.11236-4-srinivas.kandagatla@linaro.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-11-27slimbus: qcom-ngd-ctrl: remove redundant out of memory messagesSrinivas Kandagatla
Failure of dma_alloc_coherent will already throw a error message, so addition message is really redundant here. Remove it! Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Link: https://lore.kernel.org/r/20201127102451.17114-8-srinivas.kandagatla@linaro.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-11-27slimbus: qcom-ngd-ctrl: Avoid sending power requests without QMIBjorn Andersson
Attempting to send a power request during PM operations, when the QMI handle isn't initialized results in a NULL pointer dereference. So check if the QMI handle has been initialized before attempting to post the power requests. Fixes: 917809e2280b ("slimbus: ngd: Add qcom SLIMBus NGD driver") Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Link: https://lore.kernel.org/r/20201127102451.17114-7-srinivas.kandagatla@linaro.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-11-27slimbus: qcom-ngd-ctrl: Constify static structsRikard Falkeborn
qcom_slim_qmi_msg_handlers[] and qcom_slim_ngd_qmi_svc_event_ops are only used as input arguments to qmi_handle_init() which accepts const pointers to both qmi_ops and qmi_msg_handler. Make them const to allow the compiler to put them in read-only memory. Signed-off-by: Rikard Falkeborn <rikard.falkeborn@gmail.com> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Link: https://lore.kernel.org/r/20201127102451.17114-6-srinivas.kandagatla@linaro.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-11-27slimbus: qcom-ngd-ctrl: add Protection Domain Restart SupportSrinivas Kandagatla
Add support to protection domain restart. Protection domain restart would also restart the service just like SSR. Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Link: https://lore.kernel.org/r/20201127102451.17114-4-srinivas.kandagatla@linaro.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-11-27slimbus: qcom-ngd-ctrl: add Sub System Restart supportSrinivas Kandagatla
This patch adds SSR(SubSystem Restart) support which includes, synchronisation between SSR and QMI server notifications. Also with this patch now NGD is taken down by SSR instead of QMI server down notification. NGD up path now relies on both SSR and QMI notifications and particularly sequence of SSR up followed by QMI server up notification. Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Link: https://lore.kernel.org/r/20201127102451.17114-3-srinivas.kandagatla@linaro.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-09-25slimbus: qcom-ngd-ctrl: disable ngd in qmi server down callbackSrinivas Kandagatla
In QMI new server notification we enable the NGD however during delete server notification we do not disable the NGD. This can lead to multiple instances of NGD being enabled, so make sure that we disable NGD in delete server callback to fix this issue! Fixes: 917809e2280b ("slimbus: ngd: Add qcom SLIMBus NGD driver") Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Link: https://lore.kernel.org/r/20200925095520.27316-4-srinivas.kandagatla@linaro.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-04-28slimbus: ngd: remove redundant assignmentSrinivas Kandagatla
remove redundant assignment, as this is already done fewlines lines before. Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Link: https://lore.kernel.org/r/20200417093914.22052-1-srinivas.kandagatla@linaro.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-04-28slimbus: ngd: get drvdata from correct deviceSrinivas Kandagatla
Get drvdata directly from parent instead of ngd dev, as ngd dev can probe defer and previously set drvdata will become null. Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Link: https://lore.kernel.org/r/20200417093618.7929-1-srinivas.kandagatla@linaro.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-03-12slimbus: ngd: add v2.1.0 compatibleSrinivas Kandagatla
This patch adds compatible for SlimBus Controller on SDM845. Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Link: https://lore.kernel.org/r/20200312152510.12224-1-srinivas.kandagatla@linaro.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-01-14slimbus: qcom-ngd-ctrl: Use dma_request_chan() instead ↵Peter Ujfalusi
dma_request_slave_channel() dma_request_slave_channel() is a wrapper on top of dma_request_chan() eating up the error code. By using dma_request_chan() directly the driver can support deferred probing against DMA. Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Link: https://lore.kernel.org/r/20200109103148.5612-3-srinivas.kandagatla@linaro.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-08-18slimbus: qcom-ngd-ctrl: Add of_node_put() before returnNishka Dasgupta
Each iteration of for_each_available_child_of_node puts the previous node, but in the case of a return from the middle of the loop, there is no put, thus causing a memory leak. Hence add an of_node_put before the return in two places. Issue found with Coccinelle. Signed-off-by: Nishka Dasgupta <nishkadg.linux@gmail.com> Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Link: https://lore.kernel.org/r/20190818093902.29993-2-srinivas.kandagatla@linaro.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-04-25slimbus: fix a potential NULL pointer dereference in of_qcom_slim_ngd_registerKangjie Lu
In case platform_device_alloc fails, the fix returns an error code to avoid the NULL pointer dereference. Signed-off-by: Kangjie Lu <kjlu@umn.edu> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-12-06slimbus: ngd: fix spelling mistake "exeeds" -> "exceeds"Colin Ian King
There is a spelling mistake in a dev_err message, fix this. Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-11-27slimbus: ngd: Fix build error on x86Srinivas Kandagatla
on non DT platforms like x86 of_match_node is set to NULL, dereferencing directly would throw an error. Fix this by doing this in two steps, get the match then the data. Reported-by: Greg KH <gregkh@linuxfoundation.org> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-11-07slimbus: ngd: remove unnecessary checkSrinivas Kandagatla
SLIM_MSG_CLK_PAUSE_SEQ_FLG is never set in any of the slim core, so performing a check in ngd driver is totally unnecessary. Also this patch fixes warning about mc field overflow reported with CoverityScan. Making clk pause feature optional will be added to slim core in next development cycle. Reported-by: Colin Ian King <colin.king@canonical.com> Fixes: 917809e2280b ("slimbus: ngd: Add qcom SLIMBus NGD driver") Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-09-25slimbus: ngd: validate logical address assigned by remoteSrinivas Kandagatla
Validate logical address assigned by remote, in failure cases this value is all zeors. Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-09-25silmbus: ngd: register controller after power up.Srinivas Kandagatla
Register slimbus controller only after finishing powerup sequnce so that we do not endup in situation where core starts sending transactions before the controller is ready. Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-09-25slimbus: ngd: return proper error code instead of zeroSrinivas Kandagatla
It looks like there is a typo in probe return. Fix it. Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-09-25slimbus: ngd: register ngd driver only once.Srinivas Kandagatla
Move ngd platform driver out of loop so that it registers only once. Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-09-14slimbus: ngd: mark PM functions as __maybe_unusedArnd Bergmann
qcom_slim_ngd_runtime_suspend is protected by an #ifdef, qcom_slim_ngd_runtime_idle is now, which causes a build time warning: drivers/slimbus/qcom-ngd-ctrl.c:1470:12: error: 'qcom_slim_ngd_runtime_idle' defined but not used [-Werror=unused-function] Marking both as __maybe_unused lets us get rid of the warning as well as the #ifdef. Fixes: 917809e2280b ("slimbus: ngd: Add qcom SLIMBus NGD driver") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-07-07slimbus: ngd: add stream supportSrinivas Kandagatla
This patch adds support to stream support, this involve implementing user specific implementation of Data channel management and channel management SLIMbus messages. Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-07-07slimbus: ngd: Add qcom SLIMBus NGD driverSrinivas Kandagatla
This patch adds suppor to Qualcomm SLIMBus Non-Generic Device (NGD) controller driver. This is light-weight SLIMBus controller driver responsible for communicating with slave HW directly over the bus using messaging interface, and communicating with master component residing on ADSP for bandwidth and data-channel management Based on intial work from Karthikeyan Ramasubramanian <kramasub@codeaurora.org> and Sagar Dharia <sdharia@codeaurora.org> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Tested-by: Craig Tatlor <ctatlor97@gmail.com> Reviewed-by: Vinod Koul <vkoul@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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