net: stmmac: Clean-up and tune-up

This targets to uniformize the handling of the different GMAC versions in stmmac_main.c file and also tune-up the HW.

Currently there are some if/else conditions in the main source file which calls different callbacks depending on the ID of GMAC.

With the introducion of a generic HW interface handling which automatically selects the GMAC callbacks to be used, it is now unpleasant to see if conditions in the main code because this should be completely agnostic of the GMAC version.

This series removes most of these conditions. There are some if conditions that remain untouched but the callbacks handling are now uniformized.

Tested in GMAC5, hope I didn't break any previous versions.

Please check [1] for performance analisys of patches 3-12.

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David,

This will probably generate a merge conflict with [2] (which was not merged yet). I'm waiting for Corentin input and then, if this series is merged before, I will rebase [2]. Or the other way around if you prefer :D

Thanks
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[1] https://marc.info/?l=linux-netdev&m=152656352607905&w=2
[2] https://patchwork.ozlabs.org/patch/915286/

Jose Abreu (12):
net: stmmac: Enable OSP for GMAC4
net: stmmac: Do not keep rearming the coalesce timer in stmmac_xmit
net: stmmac: Let descriptor code set skbuff address
net: stmmac: Let descriptor code clear the descriptor
net: stmmac: Uniformize the use of dma_{rx/tx}_mode callbacks
net: stmmac: Remove uneeded checks for GMAC version
net: stmmac: Move PTP and MMC base address calculation to hwif.c
net: stmmac: Uniformize the use of dma_init_* callbacks
net: stmmac: Remove uneeded check for GMAC version in stmmac_xmit
net: stmmac: Uniformize set_rx_owner()
net: stmmac: Let descriptor code get skbuff address
net: stmmac: Remove if condition by taking advantage of hwif return
code

 drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c  |   82 +++++---
 .../net/ethernet/stmicro/stmmac/dwmac1000_dma.c    |   92 ++++++----
 drivers/net/ethernet/stmicro/stmmac/dwmac100_dma.c |   35 +++--
 drivers/net/ethernet/stmicro/stmmac/dwmac4_descs.c |   34 +++-
 drivers/net/ethernet/stmicro/stmmac/dwmac4_dma.c   |    7 +-
 drivers/net/ethernet/stmicro/stmmac/dwmac4_dma.h   |    1 -
 drivers/net/ethernet/stmicro/stmmac/enh_desc.c     |   20 ++-
 drivers/net/ethernet/stmicro/stmmac/hwif.c         |   34 ++++
 drivers/net/ethernet/stmicro/stmmac/hwif.h         |   27 ++-
 drivers/net/ethernet/stmicro/stmmac/norm_desc.c    |   20 ++-
 drivers/net/ethernet/stmicro/stmmac/stmmac.h       |    1 +
 drivers/net/ethernet/stmicro/stmmac/stmmac_main.c  |  198 +++++++-------------
 12 files changed, 323 insertions(+), 228 deletions(-)