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Mon, 12 Nov 2018 07:21:42 +0000 From: "Verma, Shally" To: "Dabilpuram, Nithin" , "dev@dpdk.org" , "Jacob, Jerin" , "Czekaj, Maciej" CC: "Nilla, Subrahmanyam" , "stable@dpdk.org" , "Dabilpuram, Nithin" Thread-Topic: [dpdk-dev] [PATCH] net/thunderx: fix Tx desc corruption in scatter-gather mode Thread-Index: AQHUd/AuSS2AzzKAgEaWUfJgiWHgWqVLwLHg Date: Mon, 12 Nov 2018 07:21:42 +0000 Message-ID: References: <1541742633-798-1-git-send-email-nithin.dabilpuram@caviumnetworks.com> In-Reply-To: <1541742633-798-1-git-send-email-nithin.dabilpuram@caviumnetworks.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: authentication-results: spf=none (sender IP is ) smtp.mailfrom=Shally.Verma@cavium.com; x-originating-ip: [115.113.156.2] x-ms-publictraffictype: Email x-microsoft-exchange-diagnostics: 1; SN6PR07MB4750; 6:rEAHnLSdJt/s3oDDmyfUVcX/9fdpEAgI7i5eaBAwPAHpeu7zCFZrhf4bpRMawJvtoXgP2cKCl6BuiHy8uRm7kLwbZbQD+LZkKW+FcfsbTvYCJOdOtS3rygrAVAnUfHpjERoYi9kW9sdLSCyYk4PKvOhtWCH3iDEZtHbEIfDR6q8m0z6uAVPn4PmBfOCarlsmmrdTL1NhAWVpJXwt8zsgLBv4E3YfH6jnC+swoDLKMSXlI5LiRe4GcbGKWAFfcvZenIg+XG/YWWGO1m9SLjWpABZUQ2ndf3cx6zoYApGvmBPd72aMachWwi+KIogMCL26RbXU6UZqV8gYVFFMA5OQSBI+7I1CMCTLX/+ej/KrXTDJmeLZZuqpjG1KH3LDt0U/pTrS3ByVix7sAAVAgVY8aGpOE8dLxLkzacABYcGwkxi74298uw1/4M/Lu8hKpIKVi5Cw+ijF/sRg42TaS/H8XQ==; 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BCL:0; PCL:0; RULEID:; SRVR:SN6PR07MB4750; x-forefront-prvs: 0854128AF0 received-spf: None (protection.outlook.com: cavium.com does not designate permitted sender hosts) x-microsoft-antispam-message-info: XzOQbYZk0WPSczTN4b2BmUL1pe+tB957+do4kcdNqI+r8x8LUjDdEnMLPwIFq4Ca7BDUBhUa8vXgc2Sh9F1u7eSHnCeT0fhmXNL+RXGIwav92ZmD7qe2X/suEKFG9Jnn6VhXFQyJNvRHzatH4gWv1oAIuzYIz4RGY5EzJo2rsd/P/gxujDM3Ts2/DJnBiwrawwqUouM/pd2rE2scz5IT92t6VscdLqaGuQMB5iEE2jBpnm9X0BUxCwyzOUjq6mLDlxwfFaToZeEl8qNZyGoPEKdmVCrJmK58olAT8EtQepqJdgPf1uX3RMgpa677tosabWrXMbnXGNACFfKKEOhqJW3yy7BGcVW3kW3BNi2ahtU= spamdiagnosticoutput: 1:99 spamdiagnosticmetadata: NSPM Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: cavium.com X-MS-Exchange-CrossTenant-Network-Message-Id: e4d21696-9816-407e-5a1f-08d6486f7ece X-MS-Exchange-CrossTenant-originalarrivaltime: 12 Nov 2018 07:21:42.3795 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 711e4ccf-2e9b-4bcf-a551-4094005b6194 X-MS-Exchange-Transport-CrossTenantHeadersStamped: SN6PR07MB4750 Subject: Re: [dpdk-stable] [dpdk-dev] [PATCH] net/thunderx: fix Tx desc corruption in scatter-gather mode X-BeenThere: stable@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: patches for DPDK stable branches List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 12 Nov 2018 07:21:45 -0000 >-----Original Message----- >From: dev On Behalf Of Nithin Dabilpuram >Sent: 09 November 2018 11:21 >To: dev@dpdk.org; Jacob, Jerin ; Czek= aj, Maciej >Cc: Nilla, Subrahmanyam ; stable@dpdk.org; = Dabilpuram, Nithin > >Subject: [dpdk-dev] [PATCH] net/thunderx: fix Tx desc corruption in scatte= r-gather mode > >External Email > >From: Subrahmanyam Nilla > >For performance reasons, word1 of send_hdr_s >sub descriptor was not cleared assuming it is always >having default value of zero since it comes from fixed >offsets of SQ buffer. >This is causing issues in case of SG mode because, >the size of send command might change and hence the word1 >of send_hdr_s is not always at fixed offsets of the SQ buffer >and hence not having default value of zero. > >This fixes the issue by clearing the word1 in case of SG mode >for every packet. > >Fixes: 1c421f18e0 ("net/thunderx: add single and multi-segment Tx") >Cc: stable@dpdk.org > >Signed-off-by: Subrahmanyam Nilla >Signed-off-by: Nithin Dabilpuram >--- > drivers/net/thunderx/nicvf_rxtx.c | 10 +++++++++- > 1 file changed, 9 insertions(+), 1 deletion(-) > >diff --git a/drivers/net/thunderx/nicvf_rxtx.c b/drivers/net/thunderx/nicv= f_rxtx.c >index 247c356..1c42874 100644 >--- a/drivers/net/thunderx/nicvf_rxtx.c >+++ b/drivers/net/thunderx/nicvf_rxtx.c >@@ -61,6 +61,14 @@ > entry->buff[0] =3D sqe.buff[0]; > } > >+static inline void __hot >+fill_sq_desc_header_zero_w1(union sq_entry_t *entry, >+ struct rte_mbuf *pkt) >+{ >+ fill_sq_desc_header(entry, pkt); >+ entry->buff[1] =3D 0ULL; >+} >+ > void __hot > nicvf_single_pool_free_xmited_buffers(struct nicvf_txq *sq) > { >@@ -204,7 +212,7 @@ > used_bufs +=3D nb_segs; > > txbuffs[tail] =3D NULL; >- fill_sq_desc_header(desc_ptr + tail, pkt); >+ fill_sq_desc_header_zero_w1(desc_ptr + tail, pkt); > tail =3D (tail + 1) & qlen_mask; > > txbuffs[tail] =3D pkt; >-- Acked-by: Shally Verma Thanks Shally >1.8.3.1