[PATCH v4 4/4] dma/acc: add doc

[fengchengwen]

On 10/15/2025 10:09 PM, Thomas Monjalon wrote:
> 15/10/2025 14:55, fengchengwen:
>> On 2025/10/15 20:01, Thomas Monjalon wrote:
>>> 15/10/2025 13:10, fengchengwen:
>>>> On 2025/10/15 18:05, Thomas Monjalon wrote:
>>>>> 13/10/2025 11:11, Chengwen Feng:
>>>>>> +HISILICON Accelerator DMA Driver
>>>>>> +================================
>>>>>> +
>>>>>> +Kunpeng SoC has an internal accelerator unit which includes zip function, and
>>>>>> +the zip also supports data copy and fill. This driver exposes this capability to
>>>>>> +DPDK application.
>>>>> How is it different of drivers/dma/hisilicon/ ?
>>>>>
>>>>> "
>>>>> Kunpeng SoC has an internal DMA unit which can be used by application
>>>>> to accelerate data copies.
>>>>> "
>>>>>
>>>>> If it is the same hardware (Kunpeng),
>>>>> I recommend having a single driver, or a single directory.
>>>>> Also we already have a driver named "acc" in baseband.
>>>>
>>>> they belong to different hardware IP of Kunpeng platform, /dma/hisilicon
>>>> is the PCIE subsystem DMA's driver, while this acc is the
>>>> Accelerator(ZIP) subsystem DMA's driver.  they don't exist in the same
>>>> specific Kunpeng Soc.
>>>>
>>>> a single driver will add complex.
>>>>
>>>> as for a single directory, should we do for all vendor?  I see there
>>>> are  dpaa and dpaa2, ioat and idxd both belong to vendor platform.
>>> When it is really different driver, it is OK to keep them separate.
>>>
>>>> if there are no rule to have same name with different subsystem driver,
>>>> I prefer keep it.
>>> OK but why it does not contain HiSilicon or Kunpeng in its name?
>>> "acc" is a really short name, and already used.
>>> Please find something else.
>>
>> how about hacc and kacc ?   Hisilicon / Kunpeng accelerator DMA
> 
> You already have one DMA driver in drivers/dma/hisilicon/
> Can you build around that? like hisilicon_something?
> hisil_acc?

The v6 has sent and named with hisi_acc.
In addition, the original HiSilicon driver has rename to hisi_pciep because the hardware ip is integrated endpoint of pci subsystem.

> 
>