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authorAlex Elder <elder@linaro.org>2020-03-06 07:28:21 +0300
committerDavid S. Miller <davem@davemloft.net>2020-03-09 08:07:09 +0300
commit650d1603825d8bac13557d1c0e971e9f93b386f3 (patch)
tree4de0f92876c081b84d157af09dff8dd768529161 /tools/perf/scripts/python/export-to-postgresql.py
parentca48b27be7c637b9840257e7f7befe6cabb96433 (diff)
downloadlinux-650d1603825d8bac13557d1c0e971e9f93b386f3.tar.xz
soc: qcom: ipa: the generic software interface
This patch includes "gsi.c", which implements the generic software interface (GSI) for IPA. The generic software interface abstracts channels, which provide a means of transferring data either from the AP to the IPA, or from the IPA to the AP. A ring buffer of "transfer elements" (TREs) is used to describe data transfers to perform. The AP writes a doorbell register associated with a channel to let it know it has added new entries (for an AP->IPA channel) or has finished processing entries (for an IPA->AP channel). Each channel also has an event ring buffer, used by the IPA to communicate information about events related to a channel (for example, the completion of TREs). The IPA writes its own doorbell register, which triggers an interrupt on the AP, to signal that new event information has arrived. Signed-off-by: Alex Elder <elder@linaro.org> Signed-off-by: David S. Miller <davem@davemloft.net>
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