[PATCH 00/23] Consolidate bus driver infrastructure

[David Marchand <david.marchand@redhat.com>]

This is a continuation of the work I started on the bus infrastructure,
but this time, a lot of the changes were done by a AI "friend".
It is still an unfinished topic as the current series focuses on probing
only. The detaching/cleanup aspect is postponed to another release/time.

My AI "friend" really *sucked* at git and at separating unrelated changes,
so it required quite a lot of massage/polishing afterwards.
But it seems good enough now for upstream submission.

I would like to see this series merged in 26.07, so that we have enough
time to stabilize it before the next LTS.
And seeing how it affects drivers, it is probably better to merge it
the sooner possible (so Thomas does not have to solve too many conflicts
when pulling next-* subtrees after, especially wrt the last patch).


This series refactors the DPDK bus infrastructure to consolidate common
operations and reduce code duplication across all bus drivers.
Currently, each bus implements its own specific device/driver lists,
probe logic, and lookup functions.
This series moves these common patterns into the EAL bus layer,
providing generic helpers that all buses can use.

The refactoring removes approximately 1,400 lines of duplicated code across
the codebase while maintaining full functional equivalence.

Key changes:
- Factorize device and driver lists into struct rte_bus
- Implement generic probe, device/driver lookup, and iteration helpers in EAL
- Introduce conversion macros (RTE_BUS_DEVICE, RTE_BUS_DRIVER, RTE_CLASS_TO_BUS_DEVICE)
  to safely convert between generic and bus-specific types
- Remove bus-specific device/driver types from most driver code
- Move probe logic from individual buses to rte_bus_generic_probe()
- Separate NXP-specific metadata from generic bus structures

Benefits:
- Significant code reduction (~1,400 lines removed)
- Consistent behavior across all bus types
- Simplified bus driver implementation
- Easier maintenance and future enhancements

The series is structured as a progressive refactoring:
- Remove redundant checks and helpers (patches 1-5)
- Add conversion macros and factorize lists (patches 6-8)
- Consolidate device/driver lookup and iteration (patches 9-11)
- Refactor probe logic (patches 12-15)
- Remove bus-specific types from drivers (patches 16-23)

Note on ABI:
This series breaks the ABI for drivers (changes to rte_pci_device,
rte_pci_driver, and similar structures for other buses). However, the DPDK
ABI policy does not provide guarantees for driver-level interfaces.


-- 
David Marchand

David Marchand (23):
  bus/ifpga: remove unused AFU lookup helper
  crypto/octeontx: remove check on driver in remove
  bus: remove device and driver checks in DMA map/unmap
  drivers/bus: remove device and driver checks in unplug
  drivers/bus: remove device and driver checks in plug
  bus: add bus conversion macros
  bus: factorize driver list
  bus: factorize device list
  bus: consolidate device lookup
  bus: consolidate device iteration
  bus: factorize driver lookup
  bus: refactor device probe
  bus: support multiple probe
  drivers/bus: initialize NXP bus specifics in scan
  bus: implement probe in EAL
  bus: factorize driver reference
  drivers: rely on generic driver
  drivers/bus: remove bus-specific driver references
  dma/idxd: remove specific bus type
  drivers/bus: separate specific bus metadata for NXP drivers
  drivers/bus: remove specific bus types
  eventdev: rename dev field to device
  bus: add class device conversion macro

 app/test/test_vdev.c                          |   6 +-
 drivers/baseband/acc/rte_acc100_pmd.c         |   4 +-
 drivers/baseband/acc/rte_vrb_pmd.c            |   2 +-
 .../fpga_5gnr_fec/rte_fpga_5gnr_fec.c         |   4 +-
 drivers/baseband/fpga_lte_fec/fpga_lte_fec.c  |   2 +-
 drivers/bus/auxiliary/auxiliary_common.c      | 256 +++-----------
 drivers/bus/auxiliary/auxiliary_params.c      |  65 ----
 drivers/bus/auxiliary/bus_auxiliary_driver.h  |  17 +-
 drivers/bus/auxiliary/linux/auxiliary.c       |  12 +-
 drivers/bus/auxiliary/meson.build             |   5 +-
 drivers/bus/auxiliary/private.h               |  45 +--
 drivers/bus/cdx/bus_cdx_driver.h              |  17 -
 drivers/bus/cdx/cdx.c                         | 259 +++-----------
 drivers/bus/cdx/private.h                     |   9 -
 drivers/bus/dpaa/bus_dpaa_driver.h            |  10 +-
 drivers/bus/dpaa/dpaa_bus.c                   | 317 ++++++-----------
 drivers/bus/fslmc/bus_fslmc_driver.h          |   7 +-
 drivers/bus/fslmc/fslmc_bus.c                 | 330 ++++++-----------
 drivers/bus/fslmc/fslmc_vfio.c                |  55 ++-
 drivers/bus/fslmc/portal/dpaa2_hw_dprc.c      |   4 +-
 drivers/bus/fslmc/private.h                   |  15 +-
 drivers/bus/ifpga/bus_ifpga_driver.h          |  32 +-
 drivers/bus/ifpga/ifpga_bus.c                 | 188 ++--------
 drivers/bus/pci/bsd/pci.c                     |  14 +-
 drivers/bus/pci/bus_pci_driver.h              |  15 +-
 drivers/bus/pci/linux/pci.c                   |  11 +-
 drivers/bus/pci/linux/pci_uio.c               |   6 +-
 drivers/bus/pci/pci_common.c                  | 331 +++++-------------
 drivers/bus/pci/pci_params.c                  |   9 +-
 drivers/bus/pci/private.h                     |  64 +---
 drivers/bus/pci/windows/pci.c                 |  11 +-
 drivers/bus/platform/bus_platform_driver.h    |  14 -
 drivers/bus/platform/meson.build              |   5 +-
 drivers/bus/platform/platform.c               | 191 +++-------
 drivers/bus/platform/platform_params.c        |  72 ----
 drivers/bus/platform/private.h                |  25 --
 drivers/bus/uacce/bus_uacce_driver.h          |  14 -
 drivers/bus/uacce/uacce.c                     | 241 +++----------
 drivers/bus/vdev/bus_vdev_driver.h            |  15 +-
 drivers/bus/vdev/meson.build                  |   5 +-
 drivers/bus/vdev/vdev.c                       | 212 +++++------
 drivers/bus/vdev/vdev_logs.h                  |  16 -
 drivers/bus/vdev/vdev_params.c                |  64 ----
 drivers/bus/vdev/vdev_private.h               |  28 --
 drivers/bus/vmbus/bus_vmbus_driver.h          |   3 -
 drivers/bus/vmbus/linux/vmbus_bus.c           |  11 +-
 drivers/bus/vmbus/private.h                   |  23 +-
 drivers/bus/vmbus/vmbus_common.c              | 190 +++-------
 drivers/common/mlx5/linux/mlx5_common_os.c    |   5 +-
 drivers/common/mlx5/mlx5_common.c             |   2 +-
 drivers/common/mlx5/mlx5_common_pci.c         |   2 +-
 drivers/common/mlx5/windows/mlx5_common_os.c  |   2 +-
 drivers/common/qat/qat_qp.c                   |   4 +-
 drivers/common/zsda/zsda_qp.c                 |   4 +-
 drivers/compress/octeontx/otx_zip.c           |   2 +-
 drivers/crypto/cnxk/cnxk_cryptodev_ops.c      |   2 +-
 drivers/crypto/dpaa2_sec/dpaa2_sec_dpseci.c   |   3 +-
 drivers/crypto/octeontx/otx_cryptodev.c       |   3 -
 drivers/crypto/octeontx/otx_cryptodev_ops.c   |   4 +-
 drivers/dma/idxd/idxd_bus.c                   | 114 ++----
 drivers/event/cnxk/cn10k_eventdev.c           |   8 +-
 drivers/event/cnxk/cn20k_eventdev.c           |   8 +-
 drivers/event/cnxk/cn9k_eventdev.c            |   6 +-
 drivers/event/cnxk/cnxk_eventdev.c            |   2 +-
 drivers/event/dlb2/pf/dlb2_pf.c               |   2 +-
 drivers/event/skeleton/skeleton_eventdev.c    |   2 +-
 drivers/net/ark/ark_ethdev.c                  |   2 +-
 drivers/net/atlantic/atl_ethdev.c             |  12 +-
 drivers/net/avp/avp_ethdev.c                  |  22 +-
 drivers/net/axgbe/axgbe_ethdev.c              |   4 +-
 drivers/net/bnx2x/bnx2x_ethdev.c              |   2 +-
 drivers/net/bnxt/bnxt_ethdev.c                |  12 +-
 drivers/net/bnxt/tf_ulp/bnxt_ulp.c            |   4 +-
 drivers/net/bonding/rte_eth_bond_args.c       |   4 +-
 drivers/net/cnxk/cnxk_ethdev.c                |   2 +-
 drivers/net/cnxk/cnxk_ethdev_ops.c            |   2 +-
 drivers/net/cxgbe/cxgbe_ethdev.c              |   4 +-
 drivers/net/cxgbe/cxgbevf_ethdev.c            |   4 +-
 drivers/net/dpaa/dpaa_ethdev.c                |  17 +-
 drivers/net/dpaa2/dpaa2_ethdev.c              |   8 +-
 drivers/net/dpaa2/dpaa2_recycle.c             |   8 +-
 drivers/net/ena/ena_ethdev.c                  |  10 +-
 drivers/net/enetc/enetc4_ethdev.c             |   4 +-
 drivers/net/enetc/enetc4_vf.c                 |   4 +-
 drivers/net/enetc/enetc_ethdev.c              |   2 +-
 drivers/net/enic/enic_ethdev.c                |   4 +-
 drivers/net/enic/enic_fm_flow.c               |   6 +-
 drivers/net/enic/enic_vf_representor.c        |   2 +-
 drivers/net/gve/gve_ethdev.c                  |   2 +-
 drivers/net/hinic/hinic_pmd_ethdev.c          |   8 +-
 drivers/net/hinic3/base/hinic3_hwdev.c        |   7 +-
 drivers/net/hinic3/hinic3_ethdev.c            |  16 +-
 drivers/net/hns3/hns3_cmd.c                   |   2 +-
 drivers/net/hns3/hns3_common.c                |   8 +-
 drivers/net/hns3/hns3_ethdev.c                |   6 +-
 drivers/net/hns3/hns3_ethdev_vf.c             |   6 +-
 drivers/net/hns3/hns3_rxtx.c                  |   4 +-
 drivers/net/intel/cpfl/cpfl_ethdev.c          |   4 +-
 drivers/net/intel/cpfl/cpfl_ethdev.h          |   2 +-
 drivers/net/intel/e1000/em_ethdev.c           |  12 +-
 drivers/net/intel/e1000/em_rxtx.c             |   2 +-
 drivers/net/intel/e1000/igb_ethdev.c          |  30 +-
 drivers/net/intel/e1000/igb_pf.c              |   2 +-
 drivers/net/intel/e1000/igc_ethdev.c          |  22 +-
 drivers/net/intel/fm10k/fm10k_ethdev.c        |  16 +-
 drivers/net/intel/i40e/i40e_ethdev.c          |  28 +-
 drivers/net/intel/i40e/i40e_ethdev.h          |   2 +-
 drivers/net/intel/iavf/iavf_ethdev.c          |   8 +-
 drivers/net/intel/ice/ice_dcf.c               |   6 +-
 drivers/net/intel/ice/ice_ethdev.c            |   6 +-
 drivers/net/intel/ice/ice_ethdev.h            |   2 +-
 drivers/net/intel/idpf/idpf_ethdev.h          |   2 +-
 drivers/net/intel/ipn3ke/ipn3ke_ethdev.h      |  13 -
 drivers/net/intel/ipn3ke/ipn3ke_representor.c |   6 +-
 drivers/net/intel/ixgbe/ixgbe_ethdev.c        |  40 +--
 drivers/net/intel/ixgbe/ixgbe_flow.c          |   4 +-
 drivers/net/intel/ixgbe/ixgbe_pf.c            |   2 +-
 drivers/net/intel/ixgbe/ixgbe_tm.c            |   2 +-
 .../net/intel/ixgbe/ixgbe_vf_representor.c    |   2 +-
 drivers/net/intel/ixgbe/rte_pmd_ixgbe.c       |  20 +-
 drivers/net/mlx5/linux/mlx5_os.c              |   9 +-
 drivers/net/mlx5/windows/mlx5_os.c            |   4 +-
 drivers/net/nbl/nbl_core.c                    |   2 +-
 drivers/net/nbl/nbl_dev/nbl_dev.c             |   6 +-
 drivers/net/netvsc/hn_ethdev.c                |   3 +-
 drivers/net/nfp/nfp_ethdev.c                  |   8 +-
 drivers/net/nfp/nfp_ethdev_vf.c               |   6 +-
 drivers/net/nfp/nfp_net_common.c              |   8 +-
 drivers/net/ngbe/ngbe_ethdev.c                |  20 +-
 drivers/net/ngbe/ngbe_ethdev_vf.c             |  16 +-
 drivers/net/ngbe/ngbe_pf.c                    |   2 +-
 drivers/net/ntnic/ntnic_ethdev.c              |   8 +-
 drivers/net/octeon_ep/otx_ep_ethdev.c         |   2 +-
 drivers/net/octeon_ep/otx_ep_mbox.c           |   6 +-
 drivers/net/qede/qede_ethdev.c                |   6 +-
 drivers/net/r8169/r8169_ethdev.c              |   6 +-
 drivers/net/rnp/rnp_ethdev.c                  |   6 +-
 drivers/net/sfc/sfc.c                         |   4 +-
 drivers/net/sfc/sfc_ethdev.c                  |   2 +-
 drivers/net/sfc/sfc_intr.c                    |  10 +-
 drivers/net/sfc/sfc_rx.c                      |   3 +-
 drivers/net/sfc/sfc_sriov.c                   |   2 +-
 drivers/net/sfc/sfc_tx.c                      |   3 +-
 drivers/net/thunderx/nicvf_ethdev.c           |   4 +-
 drivers/net/txgbe/txgbe_ethdev.c              |  26 +-
 drivers/net/txgbe/txgbe_ethdev_vf.c           |  16 +-
 drivers/net/txgbe/txgbe_flow.c                |   4 +-
 drivers/net/txgbe/txgbe_pf.c                  |   2 +-
 drivers/net/txgbe/txgbe_tm.c                  |   2 +-
 drivers/net/vdev_netvsc/vdev_netvsc.c         |   2 +-
 drivers/net/virtio/virtio_pci_ethdev.c        |  11 +-
 drivers/net/vmxnet3/vmxnet3_ethdev.c          |   4 +-
 drivers/net/xsc/xsc_ethdev.c                  |   2 +-
 drivers/net/zxdh/zxdh_ethdev.c                |   8 +-
 drivers/raw/cnxk_bphy/cnxk_bphy.c             |   2 +-
 drivers/raw/cnxk_bphy/cnxk_bphy_cgx.c         |   2 +-
 drivers/raw/cnxk_rvu_lf/cnxk_rvu_lf.c         |   2 +-
 drivers/raw/ifpga/afu_pmd_core.c              |   2 +-
 drivers/raw/ifpga/afu_pmd_n3000.c             |   4 +-
 drivers/raw/ifpga/ifpga_rawdev.c              |   4 +-
 drivers/raw/ntb/ntb.c                         |   2 +-
 lib/eal/common/eal_common_bus.c               | 186 +++++++++-
 lib/eal/common/eal_common_dev.c               |  45 ++-
 lib/eal/common/hotplug_mp.c                   |   4 +-
 lib/eal/include/bus_driver.h                  | 305 +++++++++++++++-
 lib/eal/include/dev_driver.h                  |   1 +
 lib/eal/linux/eal_dev.c                       |   3 +-
 lib/ethdev/ethdev_pci.h                       |   7 +-
 lib/ethdev/rte_ethdev.c                       |   2 +-
 lib/eventdev/eventdev_pmd.h                   |   2 +-
 lib/eventdev/eventdev_pmd_pci.h               |   4 +-
 lib/eventdev/eventdev_pmd_vdev.h              |   2 +-
 lib/eventdev/rte_eventdev.c                   |  14 +-
 173 files changed, 1661 insertions(+), 3012 deletions(-)
 delete mode 100644 drivers/bus/auxiliary/auxiliary_params.c
 delete mode 100644 drivers/bus/platform/platform_params.c
 delete mode 100644 drivers/bus/vdev/vdev_logs.h
 delete mode 100644 drivers/bus/vdev/vdev_params.c
 delete mode 100644 drivers/bus/vdev/vdev_private.h

-- 
2.53.0