[net-next,v2,0/7] net: stmmac: start to shrink memory usage

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(-)
  

Hi Russell,
On Mon, Mar 09, 2026 at 09:38:26AM +0000, Russell King (Oracle) wrote:
> 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
> 

No issues found with v1 on QCS9100 Ride R3, so feel free to add:

Tested-by: Mohd Ayaan Anwar <mohd.anwar@oss.qualcomm.com>

	Ayaan
  

Hello:

This series was applied to netdev/net-next.git (main)
by Jakub Kicinski <kuba@kernel.org>:

On Mon, 9 Mar 2026 09:38:26 +0000 you wrote:
> 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.
> 
> [...]

Here is the summary with links:
  - [net-next,v2,1/7] net: stmmac: provide plat_dat->dma_cfg in stmmac_plat_dat_alloc()
    https://git.kernel.org/netdev/net-next/c/7a6387dec8ce
  - [net-next,v2,2/7] net: stmmac: convert plat_stmmacenet_data booleans to type bool
    https://git.kernel.org/netdev/net-next/c/c3d08424e025
  - [net-next,v2,3/7] net: stmmac: reorder structs to reduce memory consumption
    https://git.kernel.org/netdev/net-next/c/3357642e65e9
  - [net-next,v2,4/7] net: stmmac: use u8 for ?x_queues_to_use and number_?x_queues
    https://git.kernel.org/netdev/net-next/c/94808793fed7
  - [net-next,v2,5/7] net: stmmac: use u8 for host_dma_width and similar struct members
    https://git.kernel.org/netdev/net-next/c/758ed85aadd0
  - [net-next,v2,6/7] net: stmmac: add documentation for stmmac_dma_cfg members
    https://git.kernel.org/netdev/net-next/c/9fe167ab790b
  - [net-next,v2,7/7] net: stmmac: add documentation for clocks
    https://git.kernel.org/netdev/net-next/c/315bab9411f3

You are awesome, thank you!