[PATCH v1 3/9] parisc: Convert DMA map_page to map_phys interface

[Leon Romanovsky]

On Mon, Oct 6, 2025, at 02:31, Jason Gunthorpe wrote:
> On Sun, Oct 05, 2025 at 04:22:59PM +0300, Leon Romanovsky wrote:
>> @@ -582,7 +582,7 @@ ccio_io_pdir_entry(__le64 *pdir_ptr, space_t sid, unsigned long vba,
>>         ** Grab virtual index [0:11]
>>         ** Deposit virt_idx bits into I/O PDIR word
>>         */
>> -       asm volatile ("lci %%r0(%1), %0" : "=r" (ci) : "r" (vba));
>> +       asm volatile ("lci %%r0(%1), %0" : "=r" (ci) : "r" (pba));
>
> Don't know how I missed this, but this is the virtual address for the
> cache invalidate James mentioned
>
> So the optimal is to drop the lpa() and to use phys_to_virt() to get
> vba for this instruction.

The optimal is to keep parisc arch code as I did in v1 and don't change it too much.

>
> Jason