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From: "Russell King (Oracle)" <linux@armlinux.org.uk>
To: Andrew Lunn <andrew@lunn.ch>
Cc: Alexandre Torgue <alexandre.torgue@foss.st.com>,
	Andrew Lunn <andrew+netdev@lunn.ch>,
	AngeloGioacchino Del Regno
	<angelogioacchino.delregno@collabora.com>,
	Chen-Yu Tsai <wens@kernel.org>,
	"David S. Miller" <davem@davemloft.net>,
	Eric Dumazet <edumazet@google.com>, Frank Li <Frank.Li@nxp.com>,
	imx@lists.linux.dev, Jakub Kicinski <kuba@kernel.org>,
	Jan Petrous <jan.petrous@oss.nxp.com>,
	Jonathan Hunter <jonathanh@nvidia.com>,
	linux-arm-kernel@lists.infradead.org,
	linux-arm-msm@vger.kernel.org,
	linux-mediatek@lists.infradead.org,
	linux-stm32@st-md-mailman.stormreply.com,
	linux-sunxi@lists.linux.dev, linux-tegra@vger.kernel.org,
	Maxime Chevallier <maxime.chevallier@bootlin.com>,
	Mohd Ayaan Anwar <mohd.anwar@oss.qualcomm.com>,
	netdev@vger.kernel.org, Paolo Abeni <pabeni@redhat.com>,
	Pengutronix Kernel Team <kernel@pengutronix.de>,
	s32@nxp.com, Samuel Holland <samuel@sholland.org>,
	Sascha Hauer <s.hauer@pengutronix.de>, Yao Zi <me@ziyao.cc>
Subject: [PATCH net-next v2 0/7] net: stmmac: start to shrink memory usage
Date: Mon, 9 Mar 2026 09:38:26 +0000	[thread overview]
Message-ID: <aa6VEsmBK-S9eNYU@shell.armlinux.org.uk> (raw)

Hi,

Start shrinking stmmac's memory usage by avoiding using "int" for
members that are only used for 0/1 (boolean) values, or values that
can't be larger than 255.

In addition, as struct stmmac_dma_cfg is approximately a cache line,
shrinks below a cache line as a result of this patch set, and is
required, there is no point separately allocating this from
struct plat_stmmacenet_data. Embed it into the end of this struct
and set the existing pointer to avoid large wide-spread changes.

Lastly, add documentation for struct stmmac_dma_cfg, and document
the stmmac clocks as best we can given the driver history.

v2:
- fix error in commit message for patch 5
- fix typo in comment in patch 6

 drivers/net/ethernet/stmicro/stmmac/common.h       |   4 +-
 .../ethernet/stmicro/stmmac/dwmac-dwc-qos-eth.c    |   2 +-
 drivers/net/ethernet/stmicro/stmmac/dwmac-imx.c    |   2 +-
 drivers/net/ethernet/stmicro/stmmac/dwmac-intel.c  |   7 +-
 .../net/ethernet/stmicro/stmmac/dwmac-loongson.c   |   6 +-
 .../net/ethernet/stmicro/stmmac/dwmac-mediatek.c   |   8 +-
 .../net/ethernet/stmicro/stmmac/dwmac-motorcomm.c  |   4 -
 .../ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c    |   4 +-
 drivers/net/ethernet/stmicro/stmmac/dwmac-s32.c    |   2 +-
 .../net/ethernet/stmicro/stmmac/dwmac-socfpga.c    |   2 +-
 drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c  |   4 +-
 drivers/net/ethernet/stmicro/stmmac/dwmac-sunxi.c  |   2 +-
 drivers/net/ethernet/stmicro/stmmac/dwmac-tegra.c  |   2 +-
 .../net/ethernet/stmicro/stmmac/dwmac1000_core.c   |   2 +-
 .../net/ethernet/stmicro/stmmac/dwmac100_core.c    |   2 +-
 drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c  |   4 +-
 .../net/ethernet/stmicro/stmmac/dwxgmac2_core.c    |   4 +-
 drivers/net/ethernet/stmicro/stmmac/hwif.h         |   2 +-
 drivers/net/ethernet/stmicro/stmmac/stmmac.h       |   2 +-
 drivers/net/ethernet/stmicro/stmmac/stmmac_main.c  | 227 +++++++++++----------
 drivers/net/ethernet/stmicro/stmmac/stmmac_pci.c   |  11 +-
 .../net/ethernet/stmicro/stmmac/stmmac_platform.c  |  43 ++--
 include/linux/stmmac.h                             |  93 +++++++--
 23 files changed, 239 insertions(+), 200 deletions(-)

-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
FTTP is here! 80Mbps down 10Mbps up. Decent connectivity at last!

             reply	other threads:[~2026-03-09  9:38 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-03-09  9:38 Russell King (Oracle) [this message]
2026-03-09  9:39 ` [PATCH net-next v2 1/7] net: stmmac: provide plat_dat->dma_cfg in stmmac_plat_dat_alloc() Russell King (Oracle)
2026-03-09 11:08   ` Mohd Ayaan Anwar
2026-03-09  9:39 ` [PATCH net-next v2 2/7] net: stmmac: convert plat_stmmacenet_data booleans to type bool Russell King (Oracle)
2026-03-09 11:09   ` Mohd Ayaan Anwar
2026-03-09  9:39 ` [PATCH net-next v2 3/7] net: stmmac: reorder structs to reduce memory consumption Russell King (Oracle)
2026-03-09  9:39 ` [PATCH net-next v2 4/7] net: stmmac: use u8 for ?x_queues_to_use and number_?x_queues Russell King (Oracle)
2026-03-09 11:19   ` Mohd Ayaan Anwar
2026-03-09  9:39 ` [PATCH net-next v2 5/7] net: stmmac: use u8 for host_dma_width and similar struct members Russell King (Oracle)
2026-03-09 11:10   ` Mohd Ayaan Anwar
2026-03-09  9:39 ` [PATCH net-next v2 6/7] net: stmmac: add documentation for stmmac_dma_cfg members Russell King (Oracle)
2026-03-09  9:39 ` [PATCH net-next v2 7/7] net: stmmac: add documentation for clocks Russell King (Oracle)
2026-03-09 11:06 ` [PATCH net-next v2 0/7] net: stmmac: start to shrink memory usage Mohd Ayaan Anwar
2026-03-11  3:00 ` patchwork-bot+netdevbpf

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