From mboxrd@z Thu Jan 1 00:00:00 1970 From: Vinicius Costa Gomes Date: Fri, 22 Jan 2021 14:44:52 -0800 Subject: [Intel-wired-lan] [PATCH net-next v3 7/8] igc: Add support for Frame Preemption offload In-Reply-To: <20210122224453.4161729-1-vinicius.gomes@intel.com> References: <20210122224453.4161729-1-vinicius.gomes@intel.com> Message-ID: <20210122224453.4161729-8-vinicius.gomes@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: intel-wired-lan@osuosl.org List-ID: After the set of queues that are marked as preemptible are exposed to the driver we can configure the hardware to enable the frame preemption functionality. Signed-off-by: Vinicius Costa Gomes --- drivers/net/ethernet/intel/igc/igc_main.c | 32 +++++++++++++++++++++++ 1 file changed, 32 insertions(+) diff --git a/drivers/net/ethernet/intel/igc/igc_main.c b/drivers/net/ethernet/intel/igc/igc_main.c index 1ae5f29d1b70..b05fdf739e7f 100644 --- a/drivers/net/ethernet/intel/igc/igc_main.c +++ b/drivers/net/ethernet/intel/igc/igc_main.c @@ -4806,6 +4806,23 @@ static int igc_save_qbv_schedule(struct igc_adapter *adapter, return 0; } +static int igc_save_frame_preemption(struct igc_adapter *adapter, + struct tc_preempt_qopt_offload *qopt) +{ + u32 preempt; + int i; + + preempt = qopt->preemptible_queues; + + for (i = 0; i < adapter->num_tx_queues; i++) { + struct igc_ring *ring = adapter->tx_ring[i]; + + ring->preemptible = preempt & BIT(i); + } + + return 0; +} + static int igc_tsn_enable_qbv_scheduling(struct igc_adapter *adapter, struct tc_taprio_qopt_offload *qopt) { @@ -4822,6 +4839,18 @@ static int igc_tsn_enable_qbv_scheduling(struct igc_adapter *adapter, return igc_tsn_offload_apply(adapter); } +static int igc_tsn_enable_frame_preemption(struct igc_adapter *adapter, + struct tc_preempt_qopt_offload *qopt) +{ + int err; + + err = igc_save_frame_preemption(adapter, qopt); + if (err) + return err; + + return igc_tsn_offload_apply(adapter); +} + static int igc_setup_tc(struct net_device *dev, enum tc_setup_type type, void *type_data) { @@ -4834,6 +4863,9 @@ static int igc_setup_tc(struct net_device *dev, enum tc_setup_type type, case TC_SETUP_QDISC_ETF: return igc_tsn_enable_launchtime(adapter, type_data); + case TC_SETUP_PREEMPT: + return igc_tsn_enable_frame_preemption(adapter, type_data); + default: return -EOPNOTSUPP; } -- 2.30.0