[PATCH v4 0/5] dma/imx_edma5: introduce NXP i.MX95 eDMA5 driver

[Gagandeep Singh <g.singh@nxp.com>]

[-- Warning: decoded text below may be mangled, UTF-8 assumed --]
[-- Attachment #1: Type: text/plain; charset=y, Size: 3945 bytes --]

V4-changes:
  - Removed the redundant local buffer "want"
  - Updated the comment for RTE_PMD_REGISTER_ALIAS
  - Removed stray extra blank line.

V3-changes:
 - Fixed below AI comments:
   - Dead quote-stripping removed (`of_device_is_compatible`)
   - Redundant `goto out` removed
   - New Features entry added for bus platform changes.
   - Scatter-gather doc corrected in both sections
   - Unused CH_MATTR macros removed
   - Fixed SG sub-transfer length cap (`imx_edma5_copy_sg`)
   - Updated Per-job timeout logic.
   - Updated `rte_mem_iova2virt` per-op in IOVA=VA mode logic
   - Updated comments and documentation as per the AI comments.

V2-changes:
 - Added dependent patch: bus/platform: match device by devicetree compatible string
 - Fixed multiple AI reported issues includes:
   - removed the alias from the driver, no need of it
   - removed imx_edma5_write32 from data-path, reported as coherency
     concern.
   - fix submit for previously enqueued jobs.
   - Added dsb in data path
   - Added a commnet for rte_mem_iova2virt() NULL behaviour.
   - Fixed: TCD NBYTES bits 31:30 are SMLOE/DMLOE — full 32-bit length corrupts them
   - Data path is fully synchronous: Acknowledged but intentionally deferred —
     the synchronous design is a deliberate simplification for the initial upstream submission.
     Noted in docs.
   - In-memory TCD64 pool is more complex than needed:
     Noted/deferred — the pool structure was retained for forward compatibility
     with hardware SG chaining.
   - Extended `imx_edma5_dump()` to read and print `CH_CSR` and `CH_ES` registers
     for every configured vchan.
   - Double and stary lines removed.

V1:
This patch series adds a new dmadev Poll-Mode Driver (PMD) for the NXP
i.MX95 eDMA5 (Enhanced DMA Type 5) controller.

Key features supported by this driver:
  - Memory-to-memory copy (RTE_DMA_OP_TYPE_MEMCPY)
  - Scatter-gather memory copy (RTE_DMA_OP_TYPE_SG)
  - 64-bit TCD (Transfer Control Descriptor) format
  - Non-coherent DMA with explicit cache clean/invalidate
  - Per-channel statistics and register dump for debug

Patch breakdown:
  [1/5] bus/platform: add dependent patch to detect device using
        compatible string.
  [2/5] Skeleton: bus probe/remove, dmadev registration, MAINTAINERS,
        doc index, and release notes for 26.11.
  [3/5] Device configuration: vchan setup, TCD ring allocation,
        start/stop, and capability reporting.
  [4/5] Data path: enqueue (copy and sg), doorbell, completion poll.
  [5/5] Statistics and dump: per-channel counters and register dump.

Tested on NXP i.MX95 EVK with vfio-platform.


Gagandeep Singh (5):
  bus/platform: match device by devicetree compatible string
  dma/imx_edma5: introduce eDMA5 dmadev skeleton
  dma/imx_edma5: add device configuration
  dma/imx_edma5: add data path
  dma/imx_edma5: add statistics and dump

 MAINTAINERS                                |    5 +
 doc/guides/dmadevs/imx_edma5.rst           |   69 ++
 doc/guides/dmadevs/index.rst               |    1 +
 doc/guides/rel_notes/release_26_11.rst     |   15 +
 drivers/bus/platform/bus_platform_driver.h |   11 +-
 drivers/bus/platform/platform.c            |   49 +-
 drivers/dma/imx_edma5/imx_edma5_dmadev.c   | 1190 ++++++++++++++++++++
 drivers/dma/imx_edma5/imx_edma5_dmadev.h   |  234 ++++
 drivers/dma/imx_edma5/imx_edma5_hw.h       |  143 +++
 drivers/dma/imx_edma5/imx_edma5_logs.h     |   16 +
 drivers/dma/imx_edma5/meson.build          |   10 +
 drivers/dma/meson.build                    |    1 +
 12 files changed, 1741 insertions(+), 3 deletions(-)
 create mode 100644 doc/guides/dmadevs/imx_edma5.rst
 create mode 100644 drivers/dma/imx_edma5/imx_edma5_dmadev.c
 create mode 100644 drivers/dma/imx_edma5/imx_edma5_dmadev.h
 create mode 100644 drivers/dma/imx_edma5/imx_edma5_hw.h
 create mode 100644 drivers/dma/imx_edma5/imx_edma5_logs.h
 create mode 100644 drivers/dma/imx_edma5/meson.build

-- 
2.25.1