Event ring priorities have remained out of use and are set to 1 by default.
This series brings about an enum entry expanding use of the priority field by
adding high priority tasklet scheduling to the menu.
In some cases, tasklet scheduling delays can be a nuisance. An example would be
ath11k adding a610f3c65d3b ("bus: mhi: Wait for M2 state during system resume")
in response to it. This issue can be potentially avoided if the controller uses
a dedicated event ring for control packets with high priority tasklet scheduling
in place.
There are no functional changes added to the controller (pci_generic or ath11k)
drivers with this series and the only changes there are use of the enum in place
of a harcoded value of "1". In the future, controllers can opt in to have any
event ring scheduled in high priority.
Tested on: X86_64 architecture with SDX65 on Ubuntu 18.04 distribution.
Bhaumik Bhatt (3):
bus: mhi: pci_generic: Use enum entry for event ring priority
ath11k: Use enum entry for event ring priority
bus: mhi: core: Enable support for event ring priorities
Hemant Kumar (1):
bus: mhi: core: Add support for processing priority of event ring
drivers/bus/mhi/core/init.c | 3 +-
drivers/bus/mhi/core/internal.h | 2 +-
drivers/bus/mhi/core/main.c | 19 ++++++++--
drivers/bus/mhi/pci_generic.c | 66 +++++++++++++++++------------------
drivers/net/wireless/ath/ath11k/mhi.c | 4 +--
include/linux/mhi.h | 14 ++++++--
6 files changed, 65 insertions(+), 43 deletions(-)
--
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