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Message-ID: <5820620-6450-e3f5-4ac0-e235cbf5c838@linux.intel.com> Date: Tue, 13 Sep 2022 13:45:58 +0300 (EEST) From: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com> To: Sreehari Kancharla <sreehari.kancharla@...ux.intel.com> cc: Netdev <netdev@...r.kernel.org>, kuba@...nel.org, davem@...emloft.net, johannes@...solutions.net, ryazanov.s.a@...il.com, loic.poulain@...aro.org, m.chetan.kumar@...el.com, chandrashekar.devegowda@...el.com, linuxwwan@...el.com, chiranjeevi.rapolu@...ux.intel.com, haijun.liu@...iatek.com, ricardo.martinez@...ux.intel.com, Andy Shevchenko <andriy.shevchenko@...ux.intel.com>, dinesh.sharma@...el.com, moises.veleta@...el.com, sreehari.kancharla@...el.com Subject: Re: [PATCH net-next 2/2] net: wwan: t7xx: Add NAPI support On Fri, 9 Sep 2022, Sreehari Kancharla wrote: > From: Haijun Liu <haijun.liu@...iatek.com> > > Replace the work queue based RX flow with a NAPI implementation > Remove rx_thread and dpmaif_rxq_work. > Introduce dummy network device. its responsibility is > - Binds one NAPI object for each DL HW queue and acts as > the agent of all those network devices. > - Use NAPI object to poll DL packets. > - Helps to dispatch each packet to the network interface. It would be useful to mention that GRO is also enabled. > static int t7xx_ccmni_open(struct net_device *dev) > { > struct t7xx_ccmni *ccmni = wwan_netdev_drvpriv(dev); > + struct t7xx_ccmni_ctrl *ccmni_ctl = ccmni->ctlb; > > netif_carrier_on(dev); > netif_tx_start_all_queues(dev); > + if (!atomic_read(&ccmni_ctl->napi_usr_refcnt)) { > + t7xx_ccmni_enable_napi(ccmni_ctl); > + atomic_set(&ccmni_ctl->napi_usr_refcnt, 1); > + } else { > + atomic_inc(&ccmni_ctl->napi_usr_refcnt); > + } atomic_fetch_inc() ? -- i.
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