Re: [dpdk-dev] [PATCH v3] mbuf: fix of enabling all newly added RX error flags

["Zhang, Helin" <helin.zhang@intel.com>]

> -----Original Message-----
> From: Ananyev, Konstantin
> Sent: Monday, December 8, 2014 6:45 PM
> To: Zhang, Helin; dev@dpdk.org
> Cc: Cao, Waterman; Cao, Min; olivier.matz@6wind.com
> Subject: RE: [PATCH v3] mbuf: fix of enabling all newly added RX error flags
> 
> Hi Helin,
> 
> > -----Original Message-----
> > From: Zhang, Helin
> > Sent: Saturday, December 06, 2014 1:34 AM
> > To: dev@dpdk.org
> > Cc: Cao, Waterman; Cao, Min; olivier.matz@6wind.com; Ananyev,
> > Konstantin; Zhang, Helin
> > Subject: [PATCH v3] mbuf: fix of enabling all newly added RX error
> > flags
> >
> > Before redefining mbuf structure, there was lack of free bits in 'ol_flags'
> > (32 bits in total) for new RX or TX flags. So it tried to reuse
> > existant bits as most as possible, or even assigning 0 to some of bit
> > flags. After new mbuf structure defined, there are quite a lot of free
> > bits. So those newly added bit flags should be assigned with correct
> > and valid bit values, and getting their names should be enabled as
> > well. Note that 'RECIP' should be removed, as nowhere will use it.
> > 'PKT_RX_ERR' is defined to replace all other error bit flags, e.g. MAC
> > error, Oversize error, header buffer overflow error.
> >
> > Signed-off-by: Helin Zhang <helin.zhang@intel.com>
> > ---
> >  lib/librte_mbuf/rte_mbuf.c      |  7 ++-----
> >  lib/librte_mbuf/rte_mbuf.h      |  7 ++-----
> >  lib/librte_pmd_i40e/i40e_rxtx.c | 15 ++++-----------
> >  3 files changed, 8 insertions(+), 21 deletions(-)
> >
> > v2 changes:
> > * Removed error flag of 'ECIPE' processing only in both i40e PMD and mbuf.
> All
> >   other error flags were added back.
> > * Assigned error flags with correct and valid values, as their previous values
> >   were invalid.
> > * Enabled getting all error flag names.
> >
> > v3 changes:
> > * 'PKT_RX_ERR' is defined to replace error bit flags of MAC error, Oversize
> >   error, header buffer overflow error.
> > * Removed assigning values to PKT_TX_* bit flags, as it has already been
> done
> >   in another packet set.
> >
> > diff --git a/lib/librte_mbuf/rte_mbuf.c b/lib/librte_mbuf/rte_mbuf.c
> > index 1b14e02..5e6b5d0 100644
> > --- a/lib/librte_mbuf/rte_mbuf.c
> > +++ b/lib/librte_mbuf/rte_mbuf.c
> > @@ -210,11 +210,8 @@ const char *rte_get_rx_ol_flag_name(uint64_t
> mask)
> >  	case PKT_RX_FDIR: return "PKT_RX_FDIR";
> >  	case PKT_RX_L4_CKSUM_BAD: return "PKT_RX_L4_CKSUM_BAD";
> >  	case PKT_RX_IP_CKSUM_BAD: return "PKT_RX_IP_CKSUM_BAD";
> > -	/* case PKT_RX_EIP_CKSUM_BAD: return "PKT_RX_EIP_CKSUM_BAD"; */
> > -	/* case PKT_RX_OVERSIZE: return "PKT_RX_OVERSIZE"; */
> > -	/* case PKT_RX_HBUF_OVERFLOW: return "PKT_RX_HBUF_OVERFLOW";
> */
> > -	/* case PKT_RX_RECIP_ERR: return "PKT_RX_RECIP_ERR"; */
> > -	/* case PKT_RX_MAC_ERR: return "PKT_RX_MAC_ERR"; */
> > +	case PKT_RX_EIP_CKSUM_BAD: return "PKT_RX_EIP_CKSUM_BAD";
> > +	case PKT_RX_ERR: return "PKT_RX_ERR";
> >  	case PKT_RX_IPV4_HDR: return "PKT_RX_IPV4_HDR";
> >  	case PKT_RX_IPV4_HDR_EXT: return "PKT_RX_IPV4_HDR_EXT";
> >  	case PKT_RX_IPV6_HDR: return "PKT_RX_IPV6_HDR"; diff --git
> > a/lib/librte_mbuf/rte_mbuf.h b/lib/librte_mbuf/rte_mbuf.h index
> > efdefc4..5e647a9 100644
> > --- a/lib/librte_mbuf/rte_mbuf.h
> > +++ b/lib/librte_mbuf/rte_mbuf.h
> > @@ -84,11 +84,6 @@ extern "C" {
> >  #define PKT_RX_FDIR          (1ULL << 2)  /**< RX packet with FDIR
> match indicate. */
> >  #define PKT_RX_L4_CKSUM_BAD  (1ULL << 3)  /**< L4 cksum of RX pkt.
> is
> > not OK. */  #define PKT_RX_IP_CKSUM_BAD  (1ULL << 4)  /**< IP cksum
> of
> > RX pkt. is not OK. */ -#define PKT_RX_EIP_CKSUM_BAD (0ULL << 0)  /**<
> External IP header checksum error. */
> > -#define PKT_RX_OVERSIZE      (0ULL << 0)  /**< Num of desc of an RX
> pkt oversize. */
> > -#define PKT_RX_HBUF_OVERFLOW (0ULL << 0)  /**< Header buffer
> overflow. */
> > -#define PKT_RX_RECIP_ERR     (0ULL << 0)  /**< Hardware processing
> error. */
> > -#define PKT_RX_MAC_ERR       (0ULL << 0)  /**< MAC error. */
> >  #define PKT_RX_IPV4_HDR      (1ULL << 5)  /**< RX packet with IPv4
> header. */
> >  #define PKT_RX_IPV4_HDR_EXT  (1ULL << 6)  /**< RX packet with
> extended IPv4 header. */
> >  #define PKT_RX_IPV6_HDR      (1ULL << 7)  /**< RX packet with IPv6
> header. */
> > @@ -99,6 +94,8 @@ extern "C" {
> >  #define PKT_RX_TUNNEL_IPV6_HDR (1ULL << 12) /**< RX tunnel packet
> with IPv6 header. */
> >  #define PKT_RX_FDIR_ID       (1ULL << 13) /**< FD id reported if FDIR
> match. */
> >  #define PKT_RX_FDIR_FLX      (1ULL << 14) /**< Flexible bytes reported
> if FDIR match. */
> > +#define PKT_RX_EIP_CKSUM_BAD (1ULL << 15)  /**< External IP header
> checksum error. */
> > +#define PKT_RX_ERR           (1ULL << 16)  /**< Other errors, e.g.
> MAC error. */
> >  /* add new RX flags here */
> >
> >  /* add new TX flags here */
> > diff --git a/lib/librte_pmd_i40e/i40e_rxtx.c
> > b/lib/librte_pmd_i40e/i40e_rxtx.c index 2beae3c..5d99bd2 100644
> > --- a/lib/librte_pmd_i40e/i40e_rxtx.c
> > +++ b/lib/librte_pmd_i40e/i40e_rxtx.c
> > @@ -123,25 +123,18 @@ i40e_rxd_error_to_pkt_flags(uint64_t qword)
> >  		return flags;
> >  	/* If RXE bit set, all other status bits are meaningless */
> >  	if (unlikely(error_bits & (1 << I40E_RX_DESC_ERROR_RXE_SHIFT))) {
> > -		flags |= PKT_RX_MAC_ERR;
> > +		flags |= PKT_RX_ERR;
> >  		return flags;
> >  	}
> > -
> > -	/* If RECIPE bit set, all other status indications should be ignored */
> > -	if (unlikely(error_bits & (1 << I40E_RX_DESC_ERROR_RECIPE_SHIFT))) {
> > -		flags |= PKT_RX_RECIP_ERR;
> > -		return flags;
> > -	}
> > -	if (unlikely(error_bits & (1 << I40E_RX_DESC_ERROR_HBO_SHIFT)))
> > -		flags |= PKT_RX_HBUF_OVERFLOW;
> >  	if (unlikely(error_bits & (1 << I40E_RX_DESC_ERROR_IPE_SHIFT)))
> >  		flags |= PKT_RX_IP_CKSUM_BAD;
> >  	if (unlikely(error_bits & (1 << I40E_RX_DESC_ERROR_L4E_SHIFT)))
> >  		flags |= PKT_RX_L4_CKSUM_BAD;
> >  	if (unlikely(error_bits & (1 << I40E_RX_DESC_ERROR_EIPE_SHIFT)))
> >  		flags |= PKT_RX_EIP_CKSUM_BAD;
> > -	if (unlikely(error_bits & (1 << I40E_RX_DESC_ERROR_OVERSIZE_SHIFT)))
> > -		flags |= PKT_RX_OVERSIZE;
> > +	if (unlikely(error_bits & ((1 << I40E_RX_DESC_ERROR_OVERSIZE_SHIFT) ||
> > +					(1 << I40E_RX_DESC_ERROR_HBO_SHIFT))))
> > +		flags |= PKT_RX_ERR;
> 
> It should be:
> error_bits & (1 << I40E_RX_DESC_ERROR_OVERSIZE_SHIFT | 1 <<
> I40E_RX_DESC_ERROR_HBO_SHIFT)
Ohm, stupid fault! I will fix it right now.

> 
> Another 2 questions:
> - Why not to put all these 3 bits processing together:
> error_bits & (1 << I40E_RX_DESC_ERROR_OVERSIZE_SHIFT | 1 <<
> I40E_RX_DESC_ERROR_HBO_SHIFT | 1 <<
> I40E_RX_DESC_ERROR_RXE_SHIFT) ?
If RECIPE, other bits are meaningless, said by EAS.
If HBO or OVERSIZE, IPE, L4E, EIPE could be meaningful correct or not.

> - Is there any reason why you don't want to put PMD_RX_LOG(DEBUG, ...) for
> them?
> I think it might be usefull for debugging.
For all error bits or just HBO and OVERSIZE?

> 
> Konstantin
> 
> 
> >
> >  	return flags;
> >  }
> > --
> > 1.9.3

Regards,
Helin