[RFC v2 0/3] Introduce DMA enqueue/dequeue operations

[pbhagavatula at marvell.com]

From: Pavan Nikhilesh <pbhagavatula at marvell.com>

Introduce DMA enqueue/dequeue operations to the DMA device library.

The enqueue/dequeue operations allow applications to communicate with the
DMA device using the rte_dma_op structure, providing a more flexible and
efficient way to manage DMA operations.

The programming model for the enqueue/dequeue operations is as follows:

* Query DMA devices capability for RTE_DMA_CAPA_OPS_ENQ_DEQ through
  rte_dma_info::dev_capa.
* Enable enqueue/dequeue operations on DMA device by enabling
  rte_dma_conf::enable_enq_deq during device configuration.
* Allocate a mempool for rte_dma_ops with object size of
  rte_dma_op + (sizeof(struct rte_dma_sge) * rte_dma_info::max_sges * 2).
* Configure vchans and start the dma device.
* Get an rte_dma_op from the mempool, fill it with the necessary
  information and use rte_dma_enqueue() to enqueue the operation.
* Call rte_dma_dequeue() operation to get the array of finished operations.
* Free the rte_dma_op back to the mempool.

The enqueue dequeue operations are not compatible with rte_dma_copy,
rte_dma_copy_sg, rte_dma_fill, rte_dma_submit, rte_dma_completed and
rte_dma_completed_status range of APIs.

Pavan Nikhilesh (3):
  dmadev: add enqueue dequeue operations
  dma/cnxk: implement enqueue dequeue ops
  eventdev: refactor DMA adapter ops

 app/test-eventdev/test_perf_common.c          |   6 +-
 app/test-eventdev/test_perf_common.h          |   4 +-
 app/test/test_event_dma_adapter.c             |   6 +-
 .../prog_guide/eventdev/event_dma_adapter.rst |   6 +-
 drivers/dma/cnxk/cnxk_dmadev.c                |  27 +++-
 drivers/dma/cnxk/cnxk_dmadev.h                |   7 +
 drivers/dma/cnxk/cnxk_dmadev_fp.c             | 152 +++++++++++++++++-
 lib/dmadev/rte_dmadev.c                       |  18 +++
 lib/dmadev/rte_dmadev.h                       | 145 +++++++++++++++++
 lib/dmadev/rte_dmadev_core.h                  |  10 ++
 lib/dmadev/rte_dmadev_trace_fp.h              |  20 +++
 lib/dmadev/rte_dmadev_trace_points.c          |   6 +
 lib/eventdev/rte_event_dma_adapter.c          |  18 +--
 lib/eventdev/rte_event_dma_adapter.h          |  57 -------
 14 files changed, 397 insertions(+), 85 deletions(-)

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2.43.0