From mboxrd@z Thu Jan 1 00:00:00 1970 From: Michael Lilja Subject: [PATCH v3] net/i40e: Improved FDIR programming times Date: Wed, 17 May 2017 00:01:32 +0200 Message-ID: <20170516220132.3813-1-ml@napatech.com> Mime-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: quoted-printable Cc: Michael Lilja To: Return-path: Received: from mail02.napatech.com (mail02.napatech.com [188.120.77.119]) by dpdk.org (Postfix) with ESMTP id 0207F20F for ; Wed, 17 May 2017 00:01:41 +0200 (CEST) List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" Previously, the FDIR programming time is +11ms on i40e. This patch will result in an average programming time of 22usec with a max of 60usec . Signed-off-by: Michael Lilja --- v3: * Code style fix --- drivers/net/i40e/i40e_fdir.c | 21 +++++++++++++-------- 1 file changed, 13 insertions(+), 8 deletions(-) diff --git a/drivers/net/i40e/i40e_fdir.c b/drivers/net/i40e/i40e_fdir.c index 28cc554f5..2162443f5 100644 --- a/drivers/net/i40e/i40e_fdir.c +++ b/drivers/net/i40e/i40e_fdir.c @@ -1296,23 +1296,28 @@ i40e_fdir_filter_programming(struct i40e_pf *pf, rte_wmb(); I40E_PCI_REG_WRITE(txq->qtx_tail, txq->tx_tail); - for (i =3D 0; i < I40E_FDIR_WAIT_COUNT; i++) { - rte_delay_us(I40E_FDIR_WAIT_INTERVAL_US); + for (i =3D 0; i < (I40E_FDIR_WAIT_COUNT * I40E_FDIR_WAIT_INTERVAL_U= S); i++) { if ((txdp->cmd_type_offset_bsz & - rte_cpu_to_le_64(I40E_TXD_QW1_DTYPE_MASK)) = =3D=3D - rte_cpu_to_le_64(I40E_TX_DESC_DTYPE_DESC_DO= NE)) + rte_cpu_to_le_64(I40E_TXD_QW1_DTYPE_MASK)) =3D=3D + rte_cpu_to_le_64(I40E_TX_DESC_DTYPE_DESC_DONE)) break; + rte_delay_us(1); } - if (i >=3D I40E_FDIR_WAIT_COUNT) { + if (i >=3D (I40E_FDIR_WAIT_COUNT * I40E_FDIR_WAIT_INTERVAL_US)) { PMD_DRV_LOG(ERR, "Failed to program FDIR filter:" - " time out to get DD on tx queue."); + " time out to get DD on tx queue."); return -ETIMEDOUT; } /* totally delay 10 ms to check programming status*/ - rte_delay_us((I40E_FDIR_WAIT_COUNT - i) * I40E_FDIR_WAIT_INTERVAL_U= S); + for (i =3D 0; i < (I40E_FDIR_WAIT_COUNT * I40E_FDIR_WAIT_INTERVAL_U= S); i++) { + if (i40e_check_fdir_programming_status(rxq) >=3D 0) { + break; + } + rte_delay_us(1); + } if (i40e_check_fdir_programming_status(rxq) < 0) { PMD_DRV_LOG(ERR, "Failed to program FDIR filter:" - " programming status reported."); + " programming status reported."); return -ENOSYS; } -- 2.12.2 Disclaimer: This email and any files transmitted with it may contain confid= ential information intended for the addressee(s) only. The information is n= ot to be surrendered or copied to unauthorized persons. If you have receive= d this communication in error, please notify the sender immediately and del= ete this e-mail from your system.