netdev - [PATCH 00/15] can: m_can: Optimizations for tcan and peripheral chips

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Date:   Wed, 16 Nov 2022 21:52:53 +0100
From:   Markus Schneider-Pargmann <msp@...libre.com>
To:     Chandrasekar Ramakrishnan <rcsekar@...sung.com>,
        Marc Kleine-Budde <mkl@...gutronix.de>,
        Wolfgang Grandegger <wg@...ndegger.com>
Cc:     linux-can@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Markus Schneider-Pargmann <msp@...libre.com>
Subject: [PATCH 00/15] can: m_can: Optimizations for tcan and peripheral chips

Hi,

this series is aimed at optimizing the driver code for tcan chips and
more generally for peripheral m_can chips.

I did different things to improve the performance:
- Reduce the number of SPI transfers.
- Reduce the number of interrupts.
- Enable use of FIFOs.

I am working with a tcan4550 in loopback mode attached to a beaglebone
black. I am currently working on optimizing the receive path as well
which will be submitted in another series once it is done.

Best,
Markus

Markus Schneider-Pargmann (15):
  can: m_can: Eliminate double read of TXFQS in tx_handler
  can: m_can: Wakeup net queue once tx was issued
  can: m_can: Cache tx putidx and transmits in flight
  can: m_can: Use transmit event FIFO watermark level interrupt
  can: m_can: Disable unused interrupts
  can: m_can: Avoid reading irqstatus twice
  can: m_can: Read register PSR only on error
  can: m_can: Count TXE FIFO getidx in the driver
  can: m_can: Count read getindex in the driver
  can: m_can: Batch acknowledge rx fifo
  can: m_can: Batch acknowledge transmit events
  can: tcan4x5x: Remove invalid write in clear_interrupts
  can: tcan4x5x: Fix use of register error status mask
  can: tcan4x5x: Fix register range of first block
  can: tcan4x5x: Specify separate read/write ranges

 drivers/net/can/m_can/m_can.c           | 140 +++++++++++++++---------
 drivers/net/can/m_can/m_can.h           |   5 +
 drivers/net/can/m_can/tcan4x5x-core.c   |  19 ++--
 drivers/net/can/m_can/tcan4x5x-regmap.c |  45 ++++++--
 4 files changed, 141 insertions(+), 68 deletions(-)


base-commit: 094226ad94f471a9f19e8f8e7140a09c2625abaa
prerequisite-patch-id: e9df6751d43bb0d1e3b8938d7e93bc1cfa22cef2
prerequisite-patch-id: dad9ec37af766bcafe54cb156f896267a0f47fe1
prerequisite-patch-id: f4e6f1a213a31df2741a5fa3baa87aa45ef6707a
-- 
2.38.1