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Subject[PATCH v5 00/11] mediatek: add support for MediaTek Ethernet MAC
Date
From: Bartosz Golaszewski <bgolaszewski@baylibre.com>

This series adds support for the STAR Ethernet Controller present on MediaTeK
SoCs from the MT8* family.

First we convert the existing DT bindings for the PERICFG controller to YAML
and add a new compatible string for mt8516 variant of it. Then we add the DT
bindings for the MAC.

Next we do some cleanup of the mediatek ethernet drivers directory.

The largest patch in the series adds the actual new driver.

The rest of the patches add DT fixups for the boards already supported
upstream.

v1 -> v2:
- add a generic helper for retrieving the net_device associated with given
private data
- fix several typos in commit messages
- remove MTK_MAC_VERSION and don't set the driver version
- use NET_IP_ALIGN instead of a magic number (2) but redefine it as it defaults
to 0 on arm64
- don't manually turn the carrier off in mtk_mac_enable()
- process TX cleanup in napi poll callback
- configure pause in the adjust_link callback
- use regmap_read_poll_timeout() instead of handcoding the polling
- use devres_find() to verify that struct net_device is managed by devres in
devm_register_netdev()
- add a patch moving all networking devres helpers into net/devres.c
- tweak the dma barriers: remove where unnecessary and add comments to the
remaining barriers
- don't reset internal counters when enabling the NIC
- set the net_device's mtu size instead of checking the framesize in
ndo_start_xmit() callback
- fix a race condition in waking up the netif queue
- don't emit log messages on OOM errors
- use dma_set_mask_and_coherent()
- use eth_hw_addr_random()
- rework the receive callback so that we reuse the previous skb if unmapping
fails, like we already do if skb allocation fails
- rework hash table operations: add proper timeout handling and clear bits when
appropriate

v2 -> v3:
- drop the patch adding priv_to_netdev() and store the netdev pointer in the
driver private data
- add an additional dma_wmb() after reseting the descriptor in
mtk_mac_ring_pop_tail()
- check the return value of dma_set_mask_and_coherent()
- improve the DT bindings for mtk-eth-mac: make the reg property in the example
use single-cell address and size, extend the description of the PERICFG
phandle and document the mdio sub-node
- add a patch converting the old .txt bindings for PERICFG to yaml
- limit reading the DMA memory by storing the mapped addresses in the driver
private structure
- add a patch documenting the existing networking devres helpers

v3 -> v4:
- drop the devres patches: they will be sent separately
- call netdev_sent_queue() & netdev_completed_queue() where appropriate
- don't redefine NET_IP_ALIGN: define a private constant in the driver
- fix a couple typos
- only disabe/enable the MAC in suspend/resume if netif is running
- drop the count field from the ring structure and instead calculate the number
of used descriptors from the tail and head indicies
- rework the locking used to protect the ring structures from concurrent
access: use cheaper spin_lock_bh() and completely disable the internal
spinlock used by regmap
- rework the interrupt handling to make it more fine-grained: onle re-enable
TX and RX interrupts while they're needed, process the stats updates in a
workqueue, not in napi context
- shrink the code responsible for unmapping and freeing skb memory
- rework the barriers as advised by Arnd

v4 -> v5:
- rename the driver to make it less confusing with the existing mtk_eth_soc
ethernet driver
- unregister the mdiobus at device's detachment
- open-code spin lock calls to avoid calling the _bh variants where unnecessary
- limit read-modify-write operations where possible when accessing descriptor
memory
- use READ_ONCE/WRITE_ONCE when modifying the status and data_ptr descriptor
fields

Bartosz Golaszewski (11):
dt-bindings: convert the binding document for mediatek PERICFG to yaml
dt-bindings: add new compatible to mediatek,pericfg
dt-bindings: net: add a binding document for MediaTek STAR Ethernet
MAC
net: ethernet: mediatek: rename Kconfig prompt
net: ethernet: mediatek: remove unnecessary spaces from Makefile
net: ethernet: mtk-star-emac: new driver
ARM64: dts: mediatek: add pericfg syscon to mt8516.dtsi
ARM64: dts: mediatek: add the ethernet node to mt8516.dtsi
ARM64: dts: mediatek: add an alias for ethernet0 for pumpkin boards
ARM64: dts: mediatek: add ethernet pins for pumpkin boards
ARM64: dts: mediatek: enable ethernet on pumpkin boards

.../arm/mediatek/mediatek,pericfg.txt | 36 -
.../arm/mediatek/mediatek,pericfg.yaml | 64 +
.../bindings/net/mediatek,eth-mac.yaml | 89 +
arch/arm64/boot/dts/mediatek/mt8516.dtsi | 17 +
.../boot/dts/mediatek/pumpkin-common.dtsi | 34 +
drivers/net/ethernet/mediatek/Kconfig | 9 +-
drivers/net/ethernet/mediatek/Makefile | 3 +-
drivers/net/ethernet/mediatek/mtk_star_emac.c | 1678 +++++++++++++++++
8 files changed, 1892 insertions(+), 38 deletions(-)
delete mode 100644 Documentation/devicetree/bindings/arm/mediatek/mediatek,pericfg.txt
create mode 100644 Documentation/devicetree/bindings/arm/mediatek/mediatek,pericfg.yaml
create mode 100644 Documentation/devicetree/bindings/net/mediatek,eth-mac.yaml
create mode 100644 drivers/net/ethernet/mediatek/mtk_star_emac.c

--
2.25.0

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