[v12,0/6] support dmadev

  This patch set contains six patch for new add dmadev.

Chengwen Feng (6):
  dmadev: introduce DMA device library public APIs
  dmadev: introduce DMA device library internal header
  dmadev: introduce DMA device library PMD header
  dmadev: introduce DMA device library implementation
  doc: add DMA device library guide
  maintainers: add for dmadev

---
v12:
* add max_sges filed for struct rte_dmadev_info.
* add more descriptor of dmadev.rst.
* replace scatter with scatter gather in code comment.
* split to six patch.
* fix typo.
v11:
* rename RTE_DMA_STATUS_UNKNOWN to RTE_DMA_STATUS_ERROR_UNKNOWN.
* add RTE_DMA_STATUS_INVALID_ADDR marco.
* update release-note.
* add acked-by for 1/2 patch.
* add dmadev programming guide which is 2/2 patch.
v10:
* fix rte_dmadev_completed_status comment.
v9:
* delete RTE_ASSERT invoke.
* make sure vchan setup fail when device started.
* add check src/dst port parameter when setup vchan.
* rename some variables in rte_dmadev.c.
v8:
* fix pcie access port diagram doxygen problem.
* fix typo.
* fix compile warning when enable DMADEV_DEBUG.
v7:
* add rte_dmadev_get_dev_id API.
* fix typo.
* use the default macro assignment scheme.
* rename RTE_DMA_DEV_CAPA_* to RTE_DMADEV_CAPA_*.
* rename rte_dmadev_conf.silent_mode to enable_silent.
* add memset when get stats.
v6:
* delete fence capability.
* delete vchan_release ops.
* copy_sg direct use src/dst/nb_src/nb_dst as paramter.
* define rte_dma_direction, don't support multiple direction in the
  same vchan.
* fix segment fault when allocate.
* fix typo.
* fix comments format.
v5:
* add doxy-api-* file modify.
* use RTE_LOG_REGISTER_DEFAULT.
* fix typo.
* resolve some incorrect comments.
* fix some doxgen problem.
* fix version.map still hold rte_dmadev_completed_fails.
v4:
* replace xxx_complete_fails with xxx_completed_status.
* add SILENT capability, also a silent_mode in rte_dmadev_conf.
* add op_flag_llc for performance.
* rename dmadev_xxx_t to rte_dmadev_xxx_t to avoid namespace conflict.
* delete filed 'enqueued_count' from rte_dmadev_stats.
* make rte_dmadev hold 'dev_private' filed.
* add RTE_DMA_STATUS_NOT_ATTEMPED status code.
* rename RTE_DMA_STATUS_ACTIVE_DROP to RTE_DMA_STATUS_USER_ABORT.
* rename rte_dma_sg(e) to rte_dmadev_sg(e) to make sure all struct
  prefix with rte_dmadev.
* put the comment afterwards.
* fix some doxgen problem.
* delete macro RTE_DMADEV_VALID_DEV_ID_OR_RET and
  RTE_DMADEV_PTR_OR_ERR_RET.
* replace strlcpy with rte_strscpy.
* other minor modifications from review comment.
v3:
* rm reset and fill_sg ops.
* rm MT-safe capabilities.
* add submit flag.
* redefine rte_dma_sg to implement asymmetric copy.
* delete some reserved field for future use.
* rearrangement rte_dmadev/rte_dmadev_data struct.
* refresh rte_dmadev.h copyright.
* update vchan setup parameter.
* modified some inappropriate descriptions.
* arrange version.map alphabetically.
* other minor modifications from review comment.

 MAINTAINERS                            |    5 +
 config/rte_config.h                    |    3 +
 doc/api/doxy-api-index.md              |    1 +
 doc/api/doxy-api.conf.in               |    1 +
 doc/guides/prog_guide/dmadev.rst       |  147 +++++
 doc/guides/prog_guide/index.rst        |    1 +
 doc/guides/rel_notes/release_21_08.rst |    6 +
 lib/dmadev/meson.build                 |    7 +
 lib/dmadev/rte_dmadev.c                |  563 +++++++++++++++++
 lib/dmadev/rte_dmadev.h                | 1059 ++++++++++++++++++++++++++++++++
 lib/dmadev/rte_dmadev_core.h           |  182 ++++++
 lib/dmadev/rte_dmadev_pmd.h            |   72 +++
 lib/dmadev/version.map                 |   36 ++
 lib/meson.build                        |    1 +
 14 files changed, 2084 insertions(+)
 create mode 100644 doc/guides/prog_guide/dmadev.rst
 create mode 100644 lib/dmadev/meson.build
 create mode 100644 lib/dmadev/rte_dmadev.c
 create mode 100644 lib/dmadev/rte_dmadev.h
 create mode 100644 lib/dmadev/rte_dmadev_core.h
 create mode 100644 lib/dmadev/rte_dmadev_pmd.h
 create mode 100644 lib/dmadev/version.map