> -----Original Message----- > From: Zhang, Qi Z > Sent: Thursday, March 15, 2018 3:22 AM > To: Ananyev, Konstantin <konstantin.anan...@intel.com>; tho...@monjalon.net > Cc: dev@dpdk.org; Xing, Beilei <beilei.x...@intel.com>; Wu, Jingjing > <jingjing...@intel.com>; Lu, Wenzhuo <wenzhuo...@intel.com> > Subject: RE: [dpdk-dev] [PATCH v2 4/4] net/i40e: enable deferred queue setup > > > > > -----Original Message----- > > From: Ananyev, Konstantin > > Sent: Wednesday, March 14, 2018 8:36 PM > > To: Zhang, Qi Z <qi.z.zh...@intel.com>; tho...@monjalon.net > > Cc: dev@dpdk.org; Xing, Beilei <beilei.x...@intel.com>; Wu, Jingjing > > <jingjing...@intel.com>; Lu, Wenzhuo <wenzhuo...@intel.com>; Zhang, Qi Z > > <qi.z.zh...@intel.com> > > Subject: RE: [dpdk-dev] [PATCH v2 4/4] net/i40e: enable deferred queue > > setup > > > > > > > > > -----Original Message----- > > > From: dev [mailto:dev-boun...@dpdk.org] On Behalf Of Qi Zhang > > > Sent: Friday, March 2, 2018 4:13 AM > > > To: tho...@monjalon.net > > > Cc: dev@dpdk.org; Xing, Beilei <beilei.x...@intel.com>; Wu, Jingjing > > > <jingjing...@intel.com>; Lu, Wenzhuo <wenzhuo...@intel.com>; Zhang, > > Qi > > > Z <qi.z.zh...@intel.com> > > > Subject: [dpdk-dev] [PATCH v2 4/4] net/i40e: enable deferred queue > > > setup > > > > > > Expose the deferred queue configuration capability and enhance > > > i40e_dev_[rx|tx]_queue_[setup|release] to handle the situation when > > > device already started. > > > > > > Signed-off-by: Qi Zhang <qi.z.zh...@intel.com> > > > --- > > > drivers/net/i40e/i40e_ethdev.c | 6 ++++ > > > drivers/net/i40e/i40e_rxtx.c | 62 > > ++++++++++++++++++++++++++++++++++++++++-- > > > 2 files changed, 66 insertions(+), 2 deletions(-) > > > > > > diff --git a/drivers/net/i40e/i40e_ethdev.c > > > b/drivers/net/i40e/i40e_ethdev.c index 06b0f03a1..843a0c42a 100644 > > > --- a/drivers/net/i40e/i40e_ethdev.c > > > +++ b/drivers/net/i40e/i40e_ethdev.c > > > @@ -3195,6 +3195,12 @@ i40e_dev_info_get(struct rte_eth_dev *dev, > > struct rte_eth_dev_info *dev_info) > > > DEV_TX_OFFLOAD_GRE_TNL_TSO | > > > DEV_TX_OFFLOAD_IPIP_TNL_TSO | > > > DEV_TX_OFFLOAD_GENEVE_TNL_TSO; > > > + dev_info->deferred_queue_config_capa = > > > + DEV_DEFERRED_RX_QUEUE_SETUP | > > > + DEV_DEFERRED_TX_QUEUE_SETUP | > > > + DEV_DEFERRED_RX_QUEUE_RELEASE | > > > + DEV_DEFERRED_TX_QUEUE_RELEASE; > > > + > > > dev_info->hash_key_size = (I40E_PFQF_HKEY_MAX_INDEX + 1) * > > > sizeof(uint32_t); > > > dev_info->reta_size = pf->hash_lut_size; diff --git > > > a/drivers/net/i40e/i40e_rxtx.c b/drivers/net/i40e/i40e_rxtx.c index > > > 1217e5a61..e5f532cf7 100644 > > > --- a/drivers/net/i40e/i40e_rxtx.c > > > +++ b/drivers/net/i40e/i40e_rxtx.c > > > @@ -1712,6 +1712,7 @@ i40e_dev_rx_queue_setup(struct rte_eth_dev > > *dev, > > > uint16_t len, i; > > > uint16_t reg_idx, base, bsf, tc_mapping; > > > int q_offset, use_def_burst_func = 1; > > > + int ret = 0; > > > > > > if (hw->mac.type == I40E_MAC_VF || hw->mac.type == > > I40E_MAC_X722_VF) { > > > vf = I40EVF_DEV_PRIVATE_TO_VF(dev->data->dev_private); > > > @@ -1841,6 +1842,25 @@ i40e_dev_rx_queue_setup(struct rte_eth_dev > > *dev, > > > rxq->dcb_tc = i; > > > } > > > > > > + if (dev->data->dev_started) { > > > + ret = i40e_rx_queue_init(rxq); > > > + if (ret != I40E_SUCCESS) { > > > + PMD_DRV_LOG(ERR, > > > + "Failed to do RX queue initialization"); > > > + return ret; > > > + } > > > + if (ad->rx_vec_allowed) > > > > Better to check what rx function is installed right now. > Yes, it should be fixed, need to return fail if any conflict > > > > > + i40e_rxq_vec_setup(rxq); > > > + if (!rxq->rx_deferred_start) { > > > + ret = i40e_dev_rx_queue_start(dev, queue_idx); > > > > I don't think it is a good idea to start/stop queue inside > > queue_setup/queue_release. > > There is special API (queue_start/queue_stop) to do this. > > The idea is if dev already started, the queue is supposed to be started > automatically after queue_setup.
Why is that? Might be user doesn't want to start queue, might be he only wants to start it. Might be he would need to call queue_setup() once again later before starting it - based on some logic? If the user wants to setup and start the queue immediately he can always do: rc = queue_setup(...); if (rc == 0) queue_start(...); We have a pretty well defined API here let's keep it like that. Konstantin
