archive mirror
 help / color / mirror / Atom feed
From: Georgi Djakov <>
Subject: [PATCH v2 0/2] interconnect: Add path tagging support
Date: Tue, 18 Jun 2019 12:17:22 +0300	[thread overview]
Message-ID: <> (raw)

SoCs that have multiple coexisting CPUs and DSPs, may have shared
interconnect buses between them. In such cases, each CPU/DSP may have
different bandwidth needs, depending on whether it is active or sleeping.
This means that we have to keep different bandwidth configurations for
the CPU (active/sleep). In such systems, usually there is a way to
communicate and synchronize this information with some firmware or pass
it to another processor responsible for monitoring and switching the
interconnect configurations based on the state of each CPU/DSP.

The above problem can be solved by introducing the path tagging concept,
that allows consumers to optionally attach a tag to each path they use.
This tag is used to differentiate between the aggregated bandwidth values
for each state. The tag is generic and how it's handled is up to the
platform specific interconnect provider drivers.

- Store tag with the request. (Evan)
- Reorganize the code to save bandwidth values into buckets and use the
  tag as a bitfield. (Evan)
- Clear the aggregated values after icc_set().


David Dai (1):
  interconnect: qcom: Add tagging and wake/sleep support for sdm845

Georgi Djakov (1):
  interconnect: Add support for path tags

 drivers/interconnect/core.c           |  24 ++++-
 drivers/interconnect/qcom/sdm845.c    | 131 +++++++++++++++++++-------
 include/linux/interconnect-provider.h |   4 +-
 include/linux/interconnect.h          |   5 +
 4 files changed, 129 insertions(+), 35 deletions(-)

             reply	other threads:[~2019-06-18  9:17 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-06-18  9:17 Georgi Djakov [this message]
2019-06-18  9:17 ` [PATCH v2 1/2] interconnect: Add support for path tags Georgi Djakov
2019-07-11 17:06   ` Evan Green
2019-06-18  9:17 ` [PATCH v2 2/2] interconnect: qcom: Add tagging and wake/sleep support for sdm845 Georgi Djakov
2019-07-11 17:06   ` Evan Green
2019-07-15 23:34     ` David Dai
2019-07-16 20:15       ` Evan Green
2019-07-18 17:59         ` David Dai
2019-07-30 22:54           ` Evan Green
2019-07-31  0:37             ` David Dai
2019-07-31 19:06               ` Evan Green
2019-08-02 16:22                 ` Georgi Djakov
2019-08-05 15:33                   ` [PATCH] interconnect: Add pre_aggregate() callback Georgi Djakov
2019-08-05 16:04                     ` Evan Green

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \ \ \ \ \ \ \ \ \ \ \ \ \ \

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).