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From: "Ananyev, Konstantin" <konstantin.ananyev@intel.com>
To: "Wiles, Keith" <keith.wiles@intel.com>
Cc: dpdk-dev <dev@dpdk.org>,
	"akhil.goyal@nxp.com" <akhil.goyal@nxp.com>,
	"olivier.matz@6wind.com" <olivier.matz@6wind.com>
Subject: Re: [dpdk-dev] [PATCH v2 1/7] mbuf: new function to generate raw Tx	offload value
Date: Fri, 22 Mar 2019 17:37:19 +0000	[thread overview]
Message-ID: <2601191342CEEE43887BDE71AB977258013655EDD0@irsmsx105.ger.corp.intel.com> (raw)
Message-ID: <20190322173719.XytvxFDvGCuoHFVNTibXs3MNhlCD_T9M7vwwT_DOnC0@z> (raw)
In-Reply-To: <96B7DD3D-3016-4C23-9BB0-DFB1F16B07A9@intel.com>



> -----Original Message-----
> From: Wiles, Keith
> Sent: Wednesday, March 20, 2019 5:53 PM
> To: Ananyev, Konstantin <konstantin.ananyev@intel.com>
> Cc: dpdk-dev <dev@dpdk.org>; akhil.goyal@nxp.com; olivier.matz@6wind.com
> Subject: Re: [dpdk-dev] [PATCH v2 1/7] mbuf: new function to generate raw Tx offload value
> 
> 
> 
> > On Mar 20, 2019, at 10:24 AM, Konstantin Ananyev <konstantin.ananyev@intel.com> wrote:
> >
> > Operations to set/update bit-fields often cause compilers
> > to generate suboptimal code.
> > To help avoid such situation for tx_offload fields:
> > introduce new enum for tx_offload bit-fields lengths and offsets,
> > and new function to generate raw tx_offload value.
> >
> > Signed-off-by: Konstantin Ananyev <konstantin.ananyev@intel.com>
> > ---
> > lib/librte_mbuf/rte_mbuf.h | 71 ++++++++++++++++++++++++++++++++++----
> > 1 file changed, 64 insertions(+), 7 deletions(-)
> >
> > diff --git a/lib/librte_mbuf/rte_mbuf.h b/lib/librte_mbuf/rte_mbuf.h
> > index d961ccaf6..b967ad17e 100644
> > --- a/lib/librte_mbuf/rte_mbuf.h
> > +++ b/lib/librte_mbuf/rte_mbuf.h
> > @@ -479,6 +479,26 @@ struct rte_mbuf_sched {
> > 	uint16_t reserved;   /**< Reserved. */
> > }; /**< Hierarchical scheduler */
> >
> > +/** enum for the tx_offload bit-fields lenghts and offsets. */
> > +enum {
> > +	RTE_MBUF_L2_LEN_BITS = 7,
> > +	RTE_MBUF_L3_LEN_BITS = 9,
> > +	RTE_MBUF_L4_LEN_BITS = 8,
> > +	RTE_MBUF_TSO_SEGSZ_BITS = 16,
> > +	RTE_MBUF_OL3_LEN_BITS = 9,
> > +	RTE_MBUF_OL2_LEN_BITS = 7,
> > +	RTE_MBUF_L2_LEN_OFS = 0,
> > +	RTE_MBUF_L3_LEN_OFS = RTE_MBUF_L2_LEN_OFS + RTE_MBUF_L2_LEN_BITS,
> > +	RTE_MBUF_L4_LEN_OFS = RTE_MBUF_L3_LEN_OFS + RTE_MBUF_L3_LEN_BITS,
> > +	RTE_MBUF_TSO_SEGSZ_OFS = RTE_MBUF_L4_LEN_OFS + RTE_MBUF_L4_LEN_BITS,
> > +	RTE_MBUF_OL3_LEN_OFS = RTE_MBUF_TSO_SEGSZ_OFS + RTE_MBUF_TSO_SEGSZ_BITS,
> > +	RTE_MBUF_OL2_LEN_OFS = RTE_MBUF_OL3_LEN_OFS + RTE_MBUF_OL3_LEN_BITS,
> > +	RTE_MBUF_TXOFLD_UNUSED_OFS =
> > +		RTE_MBUF_OL2_LEN_OFS + RTE_MBUF_OL2_LEN_BITS,
> > +	RTE_MBUF_TXOFLD_UNUSED_BITS =
> > +		sizeof(uint64_t) * CHAR_BIT - RTE_MBUF_TXOFLD_UNUSED_OFS,
> > +};
> 
> The naming of these fields is a bit unreadable and why do we need to add RTE_MBUF_ to everything especially adding RTE_ to everything.

It is part of public API, so I think we'll have to follow DPDK naming convention here.  

> Then we have to shorten words like OFFSET to OFS, it would be much better for readability to use something like this
> 
> RTE_MBUF_OL3_LEN_OFS to MBUF_OL3_LEN_OFFSET, then we have OL3 or OL2, which does not jump out at me as well.
> What does OL3 or OL2 mean? OffLoad-3 or OffLoad-2 this also needs to be clearly defined to improve the readability of the macros.

outer_l3_len, outer_l2_len.
These enum values follows tx_offload bit-fields definitions - see below.

> Also for TXOFLD needs to be clearer here to help the reader understand the mean of the defines.
> 
> 
> > +
> > /**
> >  * The generic rte_mbuf, containing a packet mbuf.
> >  */
> > @@ -640,19 +660,24 @@ struct rte_mbuf {
> > 		uint64_t tx_offload;       /**< combined for easy fetch */
> > 		__extension__
> > 		struct {
> > -			uint64_t l2_len:7;
> > +			uint64_t l2_len:RTE_MBUF_L2_LEN_BITS;
> > 			/**< L2 (MAC) Header Length for non-tunneling pkt.
> > 			 * Outer_L4_len + ... + Inner_L2_len for tunneling pkt.
> > 			 */
> > -			uint64_t l3_len:9; /**< L3 (IP) Header Length. */
> > -			uint64_t l4_len:8; /**< L4 (TCP/UDP) Header Length. */
> > -			uint64_t tso_segsz:16; /**< TCP TSO segment size */
> > +			uint64_t l3_len:RTE_MBUF_L3_LEN_BITS;
> > +			/**< L3 (IP) Header Length. */
> > +			uint64_t l4_len:RTE_MBUF_L4_LEN_BITS;
> > +			/**< L4 (TCP/UDP) Header Length. */
> > +			uint64_t tso_segsz:RTE_MBUF_TSO_SEGSZ_BITS;
> > +			/**< TCP TSO segment size */
> >
> > 			/* fields for TX offloading of tunnels */
> > -			uint64_t outer_l3_len:9; /**< Outer L3 (IP) Hdr Length. */
> > -			uint64_t outer_l2_len:7; /**< Outer L2 (MAC) Hdr Length. */
> > +			uint64_t outer_l3_len:RTE_MBUF_OL3_LEN_BITS;
> > +			/**< Outer L3 (IP) Hdr Length. */
> > +			uint64_t outer_l2_len:RTE_MBUF_OL2_LEN_BITS;
> > +			/**< Outer L2 (MAC) Hdr Length. */
> >
> > -			/* uint64_t unused:8; */
> > +			/* uint64_t unused:RTE_MBUF_TXOFLD_UNUSED_BITS; */
> > 		};
> > 	};
> >
> > @@ -2243,6 +2268,38 @@ static inline int rte_pktmbuf_chain(struct rte_mbuf *head, struct rte_mbuf *tail
> > 	return 0;
> > }
> >
> > +/*
> > + * @warning
> > + * @b EXPERIMENTAL: This API may change without prior notice.
> > + *
> > + * For given input values generate raw tx_offload value.
> > + * @param il2
> > + *   l2_len value.
> > + * @param il3
> > + *   l3_len value.
> > + * @param il4
> > + *   l4_len value.
> > + * @param tso
> > + *   tso_segsz value.
> > + * @param ol3
> > + *   outer_l3_len value.
> > + * @param ol2
> > + *   outer_l2_len value.
> > + * @return
> > + *   raw tx_offload value.
> > + */
> > +static inline uint64_t
> > +rte_mbuf_tx_offload(uint64_t il2, uint64_t il3, uint64_t il4, uint64_t tso,
> > +	uint64_t ol3, uint64_t ol2)
> > +{
> > +	return il2 << RTE_MBUF_L2_LEN_OFS |
> > +		il3 << RTE_MBUF_L3_LEN_OFS |
> > +		il4 << RTE_MBUF_L4_LEN_OFS |
> > +		tso << RTE_MBUF_TSO_SEGSZ_OFS |
> > +		ol3 << RTE_MBUF_OL3_LEN_OFS |
> > +		ol2 << RTE_MBUF_OL2_LEN_OFS;
> > +}
> > +
> > /**
> >  * Validate general requirements for Tx offload in mbuf.
> >  *
> > --
> > 2.17.1
> >
> 
> Regards,
> Keith


  parent reply	other threads:[~2019-03-22 17:37 UTC|newest]

Thread overview: 163+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-02-28 19:20 [dpdk-dev] [PATCH 0/6] Few small improvements for ipsec library Konstantin Ananyev
2019-02-28 19:20 ` [dpdk-dev] [PATCH 1/6] mbuf: new function to generate raw Tx offload value Konstantin Ananyev
2019-02-28 19:20 ` [dpdk-dev] [PATCH 2/6] ipsec: add Tx offload template into SA Konstantin Ananyev
2019-02-28 19:20 ` [dpdk-dev] [PATCH 3/6] ipsec: change the order in filling crypto op Konstantin Ananyev
2019-02-28 19:20 ` [dpdk-dev] [PATCH 4/6] ipsec: change the way unprocessed mbufs are accounted Konstantin Ananyev
2019-02-28 19:21 ` [dpdk-dev] [PATCH 5/6] ipsec: move inbound and outbound code into different files Konstantin Ananyev
2019-02-28 19:21 ` [dpdk-dev] [PATCH 6/6] ipsec: reorder packet check for esp inbound Konstantin Ananyev
2019-03-20 17:24 ` [dpdk-dev] [PATCH v2 0/7] Few small improvements for ipsec library Konstantin Ananyev
2019-03-20 17:24   ` Konstantin Ananyev
2019-03-20 17:24 ` [dpdk-dev] [PATCH v2 1/7] mbuf: new function to generate raw Tx offload value Konstantin Ananyev
2019-03-20 17:24   ` Konstantin Ananyev
2019-03-20 17:53   ` Wiles, Keith
2019-03-20 17:53     ` Wiles, Keith
2019-03-22 17:37     ` Ananyev, Konstantin [this message]
2019-03-22 17:37       ` Ananyev, Konstantin
2019-03-20 17:24 ` [dpdk-dev] [PATCH v2 2/7] ipsec: add Tx offload template into SA Konstantin Ananyev
2019-03-20 17:24   ` Konstantin Ananyev
2019-03-20 17:24 ` [dpdk-dev] [PATCH v2 3/7] ipsec: change the order in filling crypto op Konstantin Ananyev
2019-03-20 17:24   ` Konstantin Ananyev
2019-03-20 17:24 ` [dpdk-dev] [PATCH v2 4/7] ipsec: change the way unprocessed mbufs are accounted Konstantin Ananyev
2019-03-20 17:24   ` Konstantin Ananyev
2019-03-20 17:24 ` [dpdk-dev] [PATCH v2 5/7] ipsec: move inbound and outbound code into different files Konstantin Ananyev
2019-03-20 17:24   ` Konstantin Ananyev
2019-03-20 17:24 ` [dpdk-dev] [PATCH v2 6/7] ipsec: reorder packet check for esp inbound Konstantin Ananyev
2019-03-20 17:24   ` Konstantin Ananyev
2019-03-20 17:24 ` [dpdk-dev] [PATCH v2 7/7] ipsec: reorder packet process " Konstantin Ananyev
2019-03-20 17:24   ` Konstantin Ananyev
2019-03-20 18:46 ` [dpdk-dev] [PATCH v2 0/7] Few small improvements for ipsec library Konstantin Ananyev
2019-03-20 18:46   ` Konstantin Ananyev
2019-03-20 18:46   ` [dpdk-dev] [PATCH v2 1/7] mbuf: new function to generate raw Tx offload value Konstantin Ananyev
2019-03-20 18:46     ` Konstantin Ananyev
2019-03-21  3:33     ` Jerin Jacob Kollanukkaran
2019-03-21  3:33       ` Jerin Jacob Kollanukkaran
2019-03-21  6:04     ` Shahaf Shuler
2019-03-21  6:04       ` Shahaf Shuler
2019-03-21 13:51       ` Ananyev, Konstantin
2019-03-21 13:51         ` Ananyev, Konstantin
2019-03-24  8:00         ` Shahaf Shuler
2019-03-24  8:00           ` Shahaf Shuler
2019-03-26 15:43     ` [dpdk-dev] [PATCH v3 0/8] Few small improvements for ipsec library Konstantin Ananyev
2019-03-26 15:43       ` Konstantin Ananyev
2019-03-26 15:43       ` [dpdk-dev] [PATCH v3 1/8] mbuf: new function to generate raw Tx offload value Konstantin Ananyev
2019-03-26 15:43         ` Konstantin Ananyev
2019-03-28  8:16         ` Akhil Goyal
2019-03-28  8:16           ` Akhil Goyal
2019-03-26 15:43       ` [dpdk-dev] [PATCH v3 2/8] ipsec: add Tx offload template into SA Konstantin Ananyev
2019-03-26 15:43         ` Konstantin Ananyev
2019-03-28  8:52         ` Akhil Goyal
2019-03-28  8:52           ` Akhil Goyal
2019-03-26 15:43       ` [dpdk-dev] [PATCH v3 3/8] ipsec: change the order in filling crypto op Konstantin Ananyev
2019-03-26 15:43         ` Konstantin Ananyev
2019-03-28  9:02         ` Akhil Goyal
2019-03-28  9:02           ` Akhil Goyal
2019-03-26 15:43       ` [dpdk-dev] [PATCH v3 4/8] ipsec: change the way unprocessed mbufs are accounted Konstantin Ananyev
2019-03-26 15:43         ` Konstantin Ananyev
2019-03-28 10:52         ` Akhil Goyal
2019-03-28 10:52           ` Akhil Goyal
2019-03-26 15:43       ` [dpdk-dev] [PATCH v3 5/8] ipsec: move inbound and outbound code into different files Konstantin Ananyev
2019-03-26 15:43         ` Konstantin Ananyev
2019-03-28 11:20         ` Akhil Goyal
2019-03-28 11:20           ` Akhil Goyal
2019-03-26 15:43       ` [dpdk-dev] [PATCH v3 6/8] ipsec: reorder packet check for esp inbound Konstantin Ananyev
2019-03-26 15:43         ` Konstantin Ananyev
2019-03-28 11:27         ` Akhil Goyal
2019-03-28 11:27           ` Akhil Goyal
2019-03-26 15:43       ` [dpdk-dev] [PATCH v3 7/8] ipsec: reorder packet process " Konstantin Ananyev
2019-03-26 15:43         ` Konstantin Ananyev
2019-03-26 15:43       ` [dpdk-dev] [PATCH v3 8/8] ipsec: de-duplicate crypto op prepare code-path Konstantin Ananyev
2019-03-26 15:43         ` Konstantin Ananyev
2019-03-28 11:35         ` Akhil Goyal
2019-03-28 11:35           ` Akhil Goyal
2019-03-28 11:21       ` [dpdk-dev] [PATCH v3 0/8] Few small improvements for ipsec library Akhil Goyal
2019-03-28 11:21         ` Akhil Goyal
2019-03-28 11:49         ` Ananyev, Konstantin
2019-03-28 11:49           ` Ananyev, Konstantin
2019-03-29 10:27       ` [dpdk-dev] [PATCH v4 0/9] " Konstantin Ananyev
2019-03-29 10:27         ` Konstantin Ananyev
2019-03-29 10:27         ` [dpdk-dev] [PATCH v4 1/9] mbuf: new function to generate raw Tx offload value Konstantin Ananyev
2019-03-29 10:27           ` Konstantin Ananyev
2019-03-29 12:54           ` Olivier Matz
2019-03-29 12:54             ` Olivier Matz
2019-03-30 14:20             ` Ananyev, Konstantin
2019-03-30 14:20               ` Ananyev, Konstantin
2019-03-29 10:27         ` [dpdk-dev] [PATCH v4 2/9] ipsec: add Tx offload template into SA Konstantin Ananyev
2019-03-29 10:27           ` Konstantin Ananyev
2019-03-29 10:27         ` [dpdk-dev] [PATCH v4 3/9] ipsec: change the order in filling crypto op Konstantin Ananyev
2019-03-29 10:27           ` Konstantin Ananyev
2019-03-29 10:27         ` [dpdk-dev] [PATCH v4 4/9] ipsec: change the way unprocessed mbufs are accounted Konstantin Ananyev
2019-03-29 10:27           ` Konstantin Ananyev
2019-03-29 10:27         ` [dpdk-dev] [PATCH v4 5/9] ipsec: move inbound and outbound code into different files Konstantin Ananyev
2019-03-29 10:27           ` Konstantin Ananyev
2019-03-29 10:27         ` [dpdk-dev] [PATCH v4 6/9] ipsec: reorder packet check for esp inbound Konstantin Ananyev
2019-03-29 10:27           ` Konstantin Ananyev
2019-03-29 10:27         ` [dpdk-dev] [PATCH v4 7/9] ipsec: reorder packet process " Konstantin Ananyev
2019-03-29 10:27           ` Konstantin Ananyev
2019-03-29 10:27         ` [dpdk-dev] [PATCH v4 8/9] ipsec: de-duplicate crypto op prepare code-path Konstantin Ananyev
2019-03-29 10:27           ` Konstantin Ananyev
2019-03-29 10:27         ` [dpdk-dev] [PATCH v4 9/9] doc: add ipsec lib into shared libraries list Konstantin Ananyev
2019-03-29 10:27           ` Konstantin Ananyev
2019-03-29 16:03           ` Akhil Goyal
2019-03-29 16:03             ` Akhil Goyal
2019-04-01 12:56         ` [dpdk-dev] [PATCH v5 0/9] Few small improvements for ipsec library Konstantin Ananyev
2019-04-01 12:56           ` Konstantin Ananyev
2019-04-01 12:56           ` [dpdk-dev] [PATCH v5 1/9] mbuf: new function to generate raw Tx offload value Konstantin Ananyev
2019-04-01 12:56             ` Konstantin Ananyev
2019-04-01 13:18             ` Akhil Goyal
2019-04-01 13:18               ` Akhil Goyal
2019-04-01 13:22             ` Olivier Matz
2019-04-01 13:22               ` Olivier Matz
2019-04-01 13:55               ` Ananyev, Konstantin
2019-04-01 13:55                 ` Ananyev, Konstantin
2019-04-01 12:56           ` [dpdk-dev] [PATCH v5 2/9] ipsec: add Tx offload template into SA Konstantin Ananyev
2019-04-01 12:56             ` Konstantin Ananyev
2019-04-01 12:56           ` [dpdk-dev] [PATCH v5 3/9] ipsec: change the order in filling crypto op Konstantin Ananyev
2019-04-01 12:56             ` Konstantin Ananyev
2019-04-01 12:56           ` [dpdk-dev] [PATCH v5 4/9] ipsec: change the way unprocessed mbufs are accounted Konstantin Ananyev
2019-04-01 12:56             ` Konstantin Ananyev
2019-04-01 12:56           ` [dpdk-dev] [PATCH v5 5/9] ipsec: move inbound and outbound code into different files Konstantin Ananyev
2019-04-01 12:56             ` Konstantin Ananyev
2019-04-01 12:56           ` [dpdk-dev] [PATCH v5 6/9] ipsec: reorder packet check for esp inbound Konstantin Ananyev
2019-04-01 12:56             ` Konstantin Ananyev
2019-04-01 12:56           ` [dpdk-dev] [PATCH v5 7/9] ipsec: reorder packet process " Konstantin Ananyev
2019-04-01 12:56             ` Konstantin Ananyev
2019-04-01 12:56           ` [dpdk-dev] [PATCH v5 8/9] ipsec: de-duplicate crypto op prepare code-path Konstantin Ananyev
2019-04-01 12:56             ` Konstantin Ananyev
2019-04-01 12:56           ` [dpdk-dev] [PATCH v5 9/9] doc: add ipsec lib into shared libraries list Konstantin Ananyev
2019-04-01 12:56             ` Konstantin Ananyev
2019-04-02  8:34           ` [dpdk-dev] [PATCH v6 0/9] Few small improvements for ipsec library Konstantin Ananyev
2019-04-02  8:34             ` Konstantin Ananyev
2019-04-02  8:34             ` [dpdk-dev] [PATCH v6 1/9] mbuf: new function to generate raw Tx offload value Konstantin Ananyev
2019-04-02  8:34               ` Konstantin Ananyev
2019-04-02  8:49               ` Olivier Matz
2019-04-02  8:49                 ` Olivier Matz
2019-04-02  8:34             ` [dpdk-dev] [PATCH v6 2/9] ipsec: add Tx offload template into SA Konstantin Ananyev
2019-04-02  8:34               ` Konstantin Ananyev
2019-04-02  8:34             ` [dpdk-dev] [PATCH v6 3/9] ipsec: change the order in filling crypto op Konstantin Ananyev
2019-04-02  8:34               ` Konstantin Ananyev
2019-04-02  8:34             ` [dpdk-dev] [PATCH v6 4/9] ipsec: change the way unprocessed mbufs are accounted Konstantin Ananyev
2019-04-02  8:34               ` Konstantin Ananyev
2019-04-02  8:34             ` [dpdk-dev] [PATCH v6 5/9] ipsec: move inbound and outbound code into different files Konstantin Ananyev
2019-04-02  8:34               ` Konstantin Ananyev
2019-04-02  8:34             ` [dpdk-dev] [PATCH v6 6/9] ipsec: reorder packet check for esp inbound Konstantin Ananyev
2019-04-02  8:34               ` Konstantin Ananyev
2019-04-02  8:34             ` [dpdk-dev] [PATCH v6 7/9] ipsec: reorder packet process " Konstantin Ananyev
2019-04-02  8:34               ` Konstantin Ananyev
2019-04-02  8:34             ` [dpdk-dev] [PATCH v6 8/9] ipsec: de-duplicate crypto op prepare code-path Konstantin Ananyev
2019-04-02  8:34               ` Konstantin Ananyev
2019-04-02  8:34             ` [dpdk-dev] [PATCH v6 9/9] doc: add ipsec lib into shared libraries list Konstantin Ananyev
2019-04-02  8:34               ` Konstantin Ananyev
2019-04-02 15:36             ` [dpdk-dev] [PATCH v6 0/9] Few small improvements for ipsec library Akhil Goyal
2019-04-02 15:36               ` Akhil Goyal
2019-03-20 18:46   ` [dpdk-dev] [PATCH v2 2/7] ipsec: add Tx offload template into SA Konstantin Ananyev
2019-03-20 18:46     ` Konstantin Ananyev
2019-03-20 18:46   ` [dpdk-dev] [PATCH v2 3/7] ipsec: change the order in filling crypto op Konstantin Ananyev
2019-03-20 18:46     ` Konstantin Ananyev
2019-03-20 18:46   ` [dpdk-dev] [PATCH v2 4/7] ipsec: change the way unprocessed mbufs are accounted Konstantin Ananyev
2019-03-20 18:46     ` Konstantin Ananyev
2019-03-20 18:46   ` [dpdk-dev] [PATCH v2 5/7] ipsec: move inbound and outbound code into different files Konstantin Ananyev
2019-03-20 18:46     ` Konstantin Ananyev
2019-03-20 18:46   ` [dpdk-dev] [PATCH v2 6/7] ipsec: reorder packet check for esp inbound Konstantin Ananyev
2019-03-20 18:46     ` Konstantin Ananyev
2019-03-20 18:46   ` [dpdk-dev] [PATCH v2 7/7] ipsec: reorder packet process " Konstantin Ananyev
2019-03-20 18:46     ` Konstantin Ananyev

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