Re: [PATCH v4 2/7] dt-bindings: PCI: ti,am65: Extend for use with PVU

[Jan Kiszka]

On 04.09.24 12:16, Siddharth Vadapalli wrote:
> On Wed, Sep 04, 2024 at 12:00:11PM +0200, Jan Kiszka wrote:
>> From: Jan Kiszka <jan.kiszka@xxxxxxxxxxx>
>>
>> The PVU on the AM65 SoC is capable of restricting DMA from PCIe devices
>> to specific regions of host memory. Add the optional property
>> "memory-regions" to point to such regions of memory when PVU is used.
>>
>> Since the PVU deals with system physical addresses, utilizing the PVU
>> with PCIe devices also requires setting up the VMAP registers to map the
>> Requester ID of the PCIe device to the CBA Virtual ID, which in turn is
>> mapped to the system physical address. Hence, describe the VMAP
>> registers which are optionally unless the PVU shall used for PCIe.
> 
> The last line above seems to be accidentally modified when compared to
> the one at:
> https://lore.kernel.org/r/ada462d5-157a-4e11-ba25-d412a2bb678f@xxxxxx/
> "Hence, describe the VMAP registers which are optionally
> configured whenever PVU is used for PCIe."
> 
> If you intended to modify it, then the sentence appears distorted.
> 

Yeah, I wanted to make the original sentence clearer but failed:
"...which are optional unless the PVU shall be used for PCIe."

Jan

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