[dpdk-dev] [PATCH v23 1/6] dmadev: introduce DMA device library

[fengchengwen]

On 2021/10/5 5:12, Radha Mohan wrote:
> On Fri, Sep 24, 2021 at 3:58 AM Chengwen Feng <fengchengwen at huawei.com> wrote:
>>
>> The 'dmadevice' is a generic type of DMA device.
>>
>> This patch introduce the 'dmadevice' device allocation APIs.
>>
>> The infrastructure is prepared to welcome drivers in drivers/dma/
>>
>> Signed-off-by: Chengwen Feng <fengchengwen at huawei.com>
>> Acked-by: Bruce Richardson <bruce.richardson at intel.com>
>> Acked-by: Morten Brørup <mb at smartsharesystems.com>
>> Acked-by: Jerin Jacob <jerinjacobk at gmail.com>
>> Reviewed-by: Kevin Laatz <kevin.laatz at intel.com>
>> Reviewed-by: Conor Walsh <conor.walsh at intel.com>
>> ---
>>  MAINTAINERS                            |   5 +
>>  config/rte_config.h                    |   3 +
>>  doc/api/doxy-api-index.md              |   1 +
>>  doc/api/doxy-api.conf.in               |   1 +
>>  doc/guides/dmadevs/index.rst           |  12 ++
>>  doc/guides/index.rst                   |   1 +
>>  doc/guides/prog_guide/dmadev.rst       |  64 ++++++
>>  doc/guides/prog_guide/img/dmadev.svg   | 283 +++++++++++++++++++++++++
>>  doc/guides/prog_guide/index.rst        |   1 +
>>  doc/guides/rel_notes/release_21_11.rst |   4 +
>>  drivers/dma/meson.build                |   4 +
>>  drivers/meson.build                    |   1 +
>>  lib/dmadev/meson.build                 |   7 +
>>  lib/dmadev/rte_dmadev.c                | 263 +++++++++++++++++++++++
>>  lib/dmadev/rte_dmadev.h                | 134 ++++++++++++
>>  lib/dmadev/rte_dmadev_core.h           |  51 +++++
>>  lib/dmadev/rte_dmadev_pmd.h            |  60 ++++++
>>  lib/dmadev/version.map                 |  20 ++
>>  lib/meson.build                        |   1 +
>>  19 files changed, 916 insertions(+)
>>  create mode 100644 doc/guides/dmadevs/index.rst
>>  create mode 100644 doc/guides/prog_guide/dmadev.rst
>>  create mode 100644 doc/guides/prog_guide/img/dmadev.svg
>>  create mode 100644 drivers/dma/meson.build
>>  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
>>
> <snip>
> Hi Chengwen,
> I see that the new version removed the "rte_dmadev_get_device_by_name()".
> What is the way to get the dmadev from inside the PMD .remove ? I am
> looking to get the dev_private as we need to do some cleanup
> operations from the remove function.

Hi Radha,

PMD should invoke rte_dma_pmd_release when .remove, and the rte_dma_pmd_release will
call dev_close ops, so that PMD could do some cleanup operations in dev_close ops.

Thanks

> 
> regards,
> Radha Mohan
> 
> .
>