On Fri, Nov 10, 2023 at 3:16 PM Jakub Kicinski wrote:
>
> On Sun, 5 Nov 2023 18:44:05 -0800 Mina Almasry wrote:
> > +static int mp_dmabuf_devmem_init(struct page_pool *pool)
> > +{
> > + struct netdev_dmabuf_binding *binding = pool->mp_priv;
> > +
> > + if (!binding)
> > +
On Sun, 5 Nov 2023 18:44:05 -0800 Mina Almasry wrote:
> +static int mp_dmabuf_devmem_init(struct page_pool *pool)
> +{
> + struct netdev_dmabuf_binding *binding = pool->mp_priv;
> +
> + if (!binding)
> + return -EINVAL;
> +
> + if (pool->p.flags & PP_FLAG_DMA_MAP ||
> +
On 11/7/23 5:02 PM, Mina Almasry wrote:
> On Mon, Nov 6, 2023 at 1:02 PM Stanislav Fomichev wrote:
>>
>> On 11/05, Mina Almasry wrote:
>>> +static inline bool page_is_page_pool_iov(const struct page *page)
>>> +{
>>> + return (unsigned long)page & PP_DEVMEM;
>>> +}
>>
>> Speaking of bpf: one
On Mon, Nov 6, 2023 at 1:02 PM Stanislav Fomichev wrote:
>
> On 11/05, Mina Almasry wrote:
> > +static inline bool page_is_page_pool_iov(const struct page *page)
> > +{
> > + return (unsigned long)page & PP_DEVMEM;
> > +}
>
> Speaking of bpf: one thing that might be problematic with this
On 11/5/23 7:44 PM, Mina Almasry wrote:
> diff --git a/include/net/page_pool/helpers.h b/include/net/page_pool/helpers.h
> index 78cbb040af94..b93243c2a640 100644
> --- a/include/net/page_pool/helpers.h
> +++ b/include/net/page_pool/helpers.h
> @@ -111,6 +112,45 @@ page_pool_iov_binding(const
On 11/05, Mina Almasry wrote:
> Implement a memory provider that allocates dmabuf devmem page_pool_iovs.
>
> Support of PP_FLAG_DMA_MAP and PP_FLAG_DMA_SYNC_DEV is omitted for
> simplicity.
>
> The provider receives a reference to the struct netdev_dmabuf_binding
> via the pool->mp_priv pointer.
Implement a memory provider that allocates dmabuf devmem page_pool_iovs.
Support of PP_FLAG_DMA_MAP and PP_FLAG_DMA_SYNC_DEV is omitted for
simplicity.
The provider receives a reference to the struct netdev_dmabuf_binding
via the pool->mp_priv pointer. The driver needs to set this pointer for
