[EXT] Re: [PATCH] lib/dmadev: get DMA device using device ID

[Amit Prakash Shukla]

Hi Chengwen,

Thanks for the review and feedback. I will send the next version with suggested changes.

Thanks,
Amit Shukla

> -----Original Message-----
> From: fengchengwen <fengchengwen at huawei.com>
> Sent: Saturday, December 9, 2023 12:42 PM
> To: Amit Prakash Shukla <amitprakashs at marvell.com>; Kevin Laatz
> <kevin.laatz at intel.com>; Bruce Richardson <bruce.richardson at intel.com>
> Cc: dev at dpdk.org; Jerin Jacob Kollanukkaran <jerinj at marvell.com>; Vamsi
> Krishna Attunuru <vattunuru at marvell.com>; Nithin Kumar Dabilpuram
> <ndabilpuram at marvell.com>; Anoob Joseph <anoobj at marvell.com>;
> mb at smartsharesystems.com
> Subject: [EXT] Re: [PATCH] lib/dmadev: get DMA device using device ID
> 
> External Email
> 
> ----------------------------------------------------------------------
> Hi Amit,
> 
> On 2023/12/8 15:55, Amit Prakash Shukla wrote:
> > DMA library has a function to get DMA device based on device name but
> > there is no function to get DMA device using device id.
> >
> > Added a function that lookup for the dma device using device id and
> > returns the pointer to the same.
> >
> > Signed-off-by: Amit Prakash Shukla <amitprakashs at marvell.com>
> > ---
> >  lib/dmadev/rte_dmadev.c     |  9 +++++++++
> >  lib/dmadev/rte_dmadev_pmd.h | 14 ++++++++++++++
> >  lib/dmadev/version.map      |  1 +
> >  3 files changed, 24 insertions(+)
> >
> > diff --git a/lib/dmadev/rte_dmadev.c b/lib/dmadev/rte_dmadev.c index
> > 4e5e420c82..83f49e77f2 100644
> > --- a/lib/dmadev/rte_dmadev.c
> > +++ b/lib/dmadev/rte_dmadev.c
> > @@ -397,6 +397,15 @@ rte_dma_is_valid(int16_t dev_id)
> >  		rte_dma_devices[dev_id].state != RTE_DMA_DEV_UNUSED;  }
> >
> > +struct rte_dma_dev *
> > +rte_dma_pmd_get_dev_by_id(const int dev_id) {
> > +	if (!rte_dma_is_valid(dev_id))
> > +		return NULL;
> > +
> > +	return &rte_dma_devices[dev_id];
> > +}
> > +
> >  uint16_t
> >  rte_dma_count_avail(void)
> >  {
> > diff --git a/lib/dmadev/rte_dmadev_pmd.h
> b/lib/dmadev/rte_dmadev_pmd.h
> > index c61cedfb23..f68c3ac6aa 100644
> > --- a/lib/dmadev/rte_dmadev_pmd.h
> > +++ b/lib/dmadev/rte_dmadev_pmd.h
> > @@ -167,6 +167,20 @@ struct rte_dma_dev
> *rte_dma_pmd_allocate(const
> > char *name, int numa_node,  __rte_internal  int
> > rte_dma_pmd_release(const char *name);
> >
> > +/**
> > + * @internal
> > + * Get the rte_dma_dev structure device pointer for the device id.
> > + *
> > + * @param dev_id
> > + *   Device ID value to select the device structure.
> > + *
> > + * @return
> > + *   - rte_dma_dev structure pointer for the given device ID on success,
> NULL
> > + *   otherwise.
> > + */
> > +__rte_internal
> > +struct rte_dma_dev *rte_dma_pmd_get_dev_by_id(const int dev_id);
> > +
> >  #ifdef __cplusplus
> >  }
> >  #endif
> > diff --git a/lib/dmadev/version.map b/lib/dmadev/version.map index
> > 2a3736514c..2cd57c43d3 100644
> > --- a/lib/dmadev/version.map
> > +++ b/lib/dmadev/version.map
> > @@ -26,6 +26,7 @@ INTERNAL {
> >  	rte_dma_fp_objs;
> >  	rte_dma_pmd_allocate;
> >  	rte_dma_pmd_release;
> > +	rte_dma_pmd_get_dev_by_id;
> 
> Should arranged alphabetically in version.map
> 
> With above fixed
> Acked-by: Chengwen Feng <fengchengwen at huawei.com>
> 
> Thanks
> 
> >
> >  	local: *;
> >  };
> >