kernel/linux.git - Linux kernel stable tree (mirror)

Age	Commit message (Collapse)	Author	Files	Lines
2020-05-02	net: ipa: do not cache channel state	Alex Elder	1	-2/+1
	It is possible for a GSI channel's state to be changed as a result of an action by a different execution environment. Specifically, the modem is able to issue a GSI generic command that causes a state change on a GSI channel associated with the AP. A channel's state only needs to be known when a channel is allocated or deallocaed, started or stopped, or reset. So there is little value in caching the state anyway. Stop recording a copy of the channel's last known state, and instead fetch the true state from hardware whenever it's needed. In such cases, do record the state in a local variable, in case an error message reports it (so the value reported is the value seen). Signed-off-by: Alex Elder <elder@linaro.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-03-09	soc: qcom: ipa: GSI headers	Alex Elder	1	-0/+257
	The Generic Software Interface is a layer of the IPA driver that abstracts the underlying hardware. The next patch includes the main code for GSI (including some additional documentation). This patch just includes three GSI header files. - "gsi.h" is the top-level GSI header file. This structure is is embedded within the IPA structure. The main abstraction implemented by the GSI code is the channel, and this header exposes several operations that can be performed on a GSI channel. - "gsi_private.h" exposes some definitions that are intended to be private, used only by the main GSI code and the GSI transaction code (defined in an upcoming patch). - Like "ipa_reg.h", "gsi_reg.h" defines the offsets of the 32-bit registers used by the GSI layer, along with masks that define the position and width of fields less than 32 bits located within these registers. Signed-off-by: Alex Elder <elder@linaro.org> Signed-off-by: David S. Miller <davem@davemloft.net>