[PATCH v2 00/22] SMMU enablement for NXP LS1043A and LS1046A

[laurentiu . tudor]

From: Laurentiu Tudor <laurentiu.tudor@xxxxxxx>

This patch series adds SMMU support for NXP LS1043A and LS1046A chips
and consists mostly in important driver fixes and the required device
tree updates. It touches several subsystems and consists of three main
parts:
 - changes in soc/drivers/fsl/qbman drivers adding iommu mapping of
   reserved memory areas, fixes and defered probe support
 - changes in drivers/net/ethernet/freescale/dpaa_eth drivers
   consisting in misc dma mapping related fixes and probe ordering
 - addition of the actual arm smmu device tree node together with
   various adjustments to the device trees

Performance impact

    Running iperf benchmarks in a back-to-back setup (both sides
    having smmu enabled) on a 10GBps port show an important
    networking performance degradation of around 40% (9.48Gbps
    linerate vs 5.45Gbps) and around 30%-35% with iommu.strict=1.
    If you need performance but without SMMU support you can use
    "iommu.passthrough=1" to disable SMMU.

The patch set is based on net-next so, if generally agreed, I'd suggest
to get the patches through the netdev tree after getting all the Acks.

Changes in v2:
 - dropped confusing comments in smmu interrupt property (Robin)
 - add an intermediate simple-bus for usb to fix dma size issue (Robin)
 - use defines instead of numbers in smmu interrupt definition
 - drop redundant double iommu_get_domain_for_dev() call in few qbman
   patches

Laurentiu Tudor (22):
  soc/fsl/qman: fixup liodns only on ppc targets
  soc/fsl/bman: map FBPR area in the iommu
  soc/fsl/qman: map FQD and PFDR areas in the iommu
  soc/fsl/qman-portal: map CENA area in the iommu
  soc/fsl/qbman: add APIs to retrieve the probing status
  soc/fsl/qman_portals: defer probe after qman's probe
  soc/fsl/bman_portals: defer probe after bman's probe
  soc/fsl/qbman_portals: add APIs to retrieve the probing status
  fsl/fman: backup and restore ICID registers
  fsl/fman: add API to get the device behind a fman port
  dpaa_eth: defer probing after qbman
  dpaa_eth: base dma mappings on the fman rx port
  dpaa_eth: fix iova handling for contiguous frames
  dpaa_eth: fix iova handling for sg frames
  dpaa_eth: fix SG frame cleanup
  arm64: dts: ls1046a: add smmu node
  arm64: dts: ls1043a: add smmu node
  arm64: dts: ls104xa: set mask to drop TBU ID from StreamID
  arm64: dts: ls104x: add missing dma ranges property
  arm64: dts: ls104x: add iommu-map to pci controllers
  arm64: dts: ls104x: make dma-coherent global to the SoC
  arm64: dts: ls104x: use a pseudo-bus to constrain usb dma size

 .../arm64/boot/dts/freescale/fsl-ls1043a.dtsi | 106 ++++++++++----
 .../arm64/boot/dts/freescale/fsl-ls1046a.dtsi | 102 ++++++++++---
 .../net/ethernet/freescale/dpaa/dpaa_eth.c    | 136 ++++++++++++------
 drivers/net/ethernet/freescale/fman/fman.c    |  35 ++++-
 drivers/net/ethernet/freescale/fman/fman.h    |   4 +
 .../net/ethernet/freescale/fman/fman_port.c   |  14 ++
 .../net/ethernet/freescale/fman/fman_port.h   |   2 +
 drivers/soc/fsl/qbman/bman_ccsr.c             |  22 +++
 drivers/soc/fsl/qbman/bman_portal.c           |  20 ++-
 drivers/soc/fsl/qbman/qman_ccsr.c             |  28 ++++
 drivers/soc/fsl/qbman/qman_portal.c           |  35 +++++
 include/soc/fsl/bman.h                        |  16 +++
 include/soc/fsl/qman.h                        |  17 +++
 13 files changed, 438 insertions(+), 99 deletions(-)

-- 
2.17.1