Hello Chengwen, On Wed, 12 Aug 2026 at 11:29, Gagandeep Singh <[email protected]> wrote: > > 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
Please, could you have a look at this new DMA driver? -- David Marchand
