On Tue, 15 Feb 2022, Martinez, Ricardo wrote:
> On 2/8/2022 12:19 AM, Ilpo Järvinen wrote:
> > On Thu, 13 Jan 2022, Ricardo Martinez wrote:
> >
> > > +/* SKB control buffer indexed values */
> > > +#define TX_CB_NETIF_IDX 0
> > > +#define TX_CB_QTYPE 1
> > > +#define TX_CB_DRB_CNT 2
> > The normal way of storing a struct to skb->cb area is:
> >
> > struct t7xx_skb_cb {
> > u8 netif_idx;
> > u8 qtype;
> > u8 drb_cnt;
> > };
> >
> > #define T7XX_SKB_CB(__skb) ((struct t7xx_skb_cb *)&((__skb)->cb[0]))
> >
> > However, there's only a single txqt/qtype (TXQ_TYPE_DEFAULT) in the
> > patchset? And it seems to me that drb_cnt is a value that could be always
> > derived using t7xx_get_drb_cnt_per_skb() from the skb rather than
> > stored?
>
> The next iteration will contain t7xx_tx_skb_cb and t7xx_rx_skb_cb structures.
Ah, I didn't even notice the other one. Why differentiate them? There's
enough space in cb area and netif_idx is in both anyway. (union inside
struct could be used if short on space and tx/rx differ but it is not
needed here now.)
> Also, q_number is going to be used instead of qtype.
>
> Only one queue is used but I think we can keep this code generic as it is
> straight forward (not like the drb_lack case), any thoughts?
I don't mind if you find it useful.
--
i.
