netdev - [PATCH net-next 0/2] net: dsa: mv88e6xxx: Improve indirect addressing performance

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Date:   Thu, 27 Jan 2022 00:12:37 +0100
From:   Tobias Waldekranz <tobias@...dekranz.com>
To:     davem@...emloft.net, kuba@...nel.org
Cc:     netdev@...r.kernel.org
Subject: [PATCH net-next 0/2] net: dsa: mv88e6xxx: Improve indirect addressing performance

The individual patches have all the details. This work was triggered
by recent work on a platform that took 16s (sic) to load the mv88e6xxx
module.

The first patch gets rid of most of that time by replacing a very long
delay with a tighter poll loop to wait for the busy bit to clear.

The second patch shaves off some more time by avoiding redundant
busy-bit-checks, saving 1 out of 4 MDIO operations for every register
read/write in the optimal case.

Tobias Waldekranz (2):
  net: dsa: mv88e6xxx: Improve performance of busy bit polling
  net: dsa: mv88e6xxx: Improve indirect addressing performance

 drivers/net/dsa/mv88e6xxx/chip.c |  8 ++++----
 drivers/net/dsa/mv88e6xxx/chip.h |  1 +
 drivers/net/dsa/mv88e6xxx/smi.c  | 32 ++++++++++++++++++--------------
 3 files changed, 23 insertions(+), 18 deletions(-)

-- 
2.25.1