On 16 April 2015 at 13:40, Savolainen, Petri (Nokia - FI/Espoo) < petri.savolai...@nokia.com> wrote:
> > > > -----Original Message----- > > From: lng-odp [mailto:lng-odp-boun...@lists.linaro.org] On Behalf Of ext > > Taras Kondratiuk > > Sent: Thursday, April 16, 2015 12:05 PM > > To: Bill Fischofer; lng-odp@lists.linaro.org > > Subject: Re: [lng-odp] [API-NEXT PATCHv4 1/6] api: packet: add user > > metadata APIs > > > > On 04/10/2015 06:52 PM, Bill Fischofer wrote: > > > Signed-off-by: Bill Fischofer <bill.fischo...@linaro.org> > > > --- > > > include/odp/api/packet.h | 20 ++++++++++++++++++++ > > > 1 file changed, 20 insertions(+) > > > > > > diff --git a/include/odp/api/packet.h b/include/odp/api/packet.h > > > index a31c54d..840e152 100644 > > > --- a/include/odp/api/packet.h > > > +++ b/include/odp/api/packet.h > > > @@ -467,6 +467,26 @@ uint64_t odp_packet_user_u64(odp_packet_t pkt); > > > void odp_packet_user_u64_set(odp_packet_t pkt, uint64_t ctx); > > > > > > /** > > > + * Get address of user metadata associated with a packet > > > + * > > > + * @param pkt Packet handle > > > + * > > > + * @retval addr Address of the user metadata associated with > > pkt > > > + * @retval NULL The packet has no user metadata. > > > + */ > > > +void *odp_packet_user_data(odp_packet_t pkt); > > > + > > > +/** > > > + * Get size of user metadata associated with a packet > > > + * > > > + * @param pkt Packet handle > > > + * > > > + * @return Number of bytes of user metadata associated > > > + * with pkt. > > > + */ > > > +uint32_t odp_packet_user_data_size(odp_packet_t pkt); > > > + > > > +/** > > > * Layer 2 start pointer > > > * > > > * Returns pointer to the start of the layer 2 header. Optionally, > > outputs > > > > > > > I assume usage of user_data, user_ptr and user_u64 are all mutually > > exclusive. I mean the same memory location can be used to store all of > > them. It should be noted somewhere. > > I was thinking this as a separate area, but maybe it's clearer that we > have only one user metadata area, which is always at least 8 bytes > (user_ptr / user_64). This could be the public concept (as defined by the ODP API). > An additional area is allocated, when user requests pool_param.udata_size > >8 bytes. Implementation can always reserve 8 bytes in the descriptor and > use the same bytes for the pointer to a larger udata area. > This is a potential implementation. I don't think this should be part of the public API. Maybe documented in the implementation notes for those platforms that use this implementation. > > -Petri > > > _______________________________________________ > > lng-odp mailing list > > lng-odp@lists.linaro.org > > https://lists.linaro.org/mailman/listinfo/lng-odp > _______________________________________________ > lng-odp mailing list > lng-odp@lists.linaro.org > https://lists.linaro.org/mailman/listinfo/lng-odp >
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