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* [PATCH v1 0/4] MHI event ring priority updates
@ 2021-06-17 21:30 Bhaumik Bhatt
  2021-06-17 21:30 ` [PATCH v1 1/4] bus: mhi: core: Add support for processing priority of event ring Bhaumik Bhatt
                   ` (3 more replies)
  0 siblings, 4 replies; 11+ messages in thread
From: Bhaumik Bhatt @ 2021-06-17 21:30 UTC (permalink / raw)
  To: manivannan.sadhasivam
  Cc: linux-arm-msm, hemantk, jhugo, linux-kernel, carl.yin,
	naveen.kumar, loic.poulain, Bhaumik Bhatt

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(-)

-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project


^ permalink raw reply	[flat|nested] 11+ messages in thread

end of thread, other threads:[~2021-06-18 17:43 UTC | newest]

Thread overview: 11+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-06-17 21:30 [PATCH v1 0/4] MHI event ring priority updates Bhaumik Bhatt
2021-06-17 21:30 ` [PATCH v1 1/4] bus: mhi: core: Add support for processing priority of event ring Bhaumik Bhatt
2021-06-18  7:03   ` Manivannan Sadhasivam
2021-06-18 17:17     ` Bhaumik Bhatt
2021-06-18 17:31       ` Manivannan Sadhasivam
2021-06-18 17:43         ` Bhaumik Bhatt
2021-06-17 21:30 ` [PATCH v1 2/4] bus: mhi: pci_generic: Use enum entry for event ring priority Bhaumik Bhatt
2021-06-17 22:21   ` Hemant Kumar
2021-06-17 21:30 ` [PATCH v1 3/4] ath11k: " Bhaumik Bhatt
2021-06-17 21:30 ` [PATCH v1 4/4] bus: mhi: core: Enable support for event ring priorities Bhaumik Bhatt
2021-06-17 22:20   ` Hemant Kumar

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