linux-kernel - [PATCH net-next v2 0/4] net: lan966x: Add support for FDMA

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Message-ID: <20220318204750.1864134-1-horatiu.vultur@microchip.com>
Date:   Fri, 18 Mar 2022 21:47:46 +0100
From:   Horatiu Vultur <horatiu.vultur@...rochip.com>
To:     <linux-kernel@...r.kernel.org>, <netdev@...r.kernel.org>
CC:     <davem@...emloft.net>, <kuba@...nel.org>, <michael@...le.cc>,
        <UNGLinuxDriver@...rochip.com>,
        Horatiu Vultur <horatiu.vultur@...rochip.com>
Subject: [PATCH net-next v2 0/4] net: lan966x: Add support for FDMA

Currently when injecting or extracting a frame from CPU, the frame
is given to the HW each word at a time. There is another way to
inject/extract frames from CPU using FDMA(Frame Direct Memory Access).
In this way the entire frame is given to the HW. This improves both
RX and TX bitrate.

v1->v2:
- fix typo in commit message in last patch
- remove first patch as the changes are already there
- make sure that there is space in skb to put the FCS
- move skb_tx_timestamp closer to the handover of the frame to the HW

Horatiu Vultur (4):
  net: lan966x: Add registers that are used for FDMA.
  net: lan966x: Expose functions that are needed by FDMA
  net: lan966x: Add FDMA functionality
  net: lan966x: Update FDMA to change MTU.

 .../net/ethernet/microchip/lan966x/Makefile   |   2 +-
 .../ethernet/microchip/lan966x/lan966x_fdma.c | 775 ++++++++++++++++++
 .../ethernet/microchip/lan966x/lan966x_main.c |  44 +-
 .../ethernet/microchip/lan966x/lan966x_main.h | 120 +++
 .../ethernet/microchip/lan966x/lan966x_port.c |   3 +
 .../ethernet/microchip/lan966x/lan966x_regs.h | 106 +++
 6 files changed, 1038 insertions(+), 12 deletions(-)
 create mode 100644 drivers/net/ethernet/microchip/lan966x/lan966x_fdma.c

-- 
2.33.0