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a=rsa-sha256; c=relaxed/relaxed; d=estab.onmicrosoft.com; s=selector2-estab-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=hyccUYh2pEpQWEmch0Qj4pn+fn6yEzbnJjPn0aC669Q=; b=VN6ayClDRy0EL42BzG2LrkCwTB/JL08ND6c7eA33t3ukem2E/qox1ile43tpiL++YlP/us3ci/o2IMnHxp1p1ZEj2cR7jUzRG4Ftlep0UvC5KZOCdeDig+ATL//FgruOzfOKgHIrNy+REVa5FSidBRAtO9RAMh8pbEkts3QU+58= X-Mailman-Original-Authentication-Results: smtp1.osuosl.org; dkim=pass (1024-bit key) header.d=estab.onmicrosoft.com header.i=@estab.onmicrosoft.com header.a=rsa-sha256 header.s=selector2-estab-onmicrosoft-com header.b=VN6ayClD X-Mailman-Original-Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=est.tech; Subject: [Intel-wired-lan] [PATCH 2/4] igb: Introduce txrx ring enable/disable functions X-BeenThere: intel-wired-lan@osuosl.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel Wired Ethernet Linux Kernel Driver Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Jesper Dangaard Brouer , Daniel Borkmann , netdev@vger.kernel.org, John Fastabend , Jesse Brandeburg , Alexei Starovoitov , Eric Dumazet , Sriram Yagnaraman , Tony Nguyen , Jakub Kicinski , intel-wired-lan@lists.osuosl.org, bpf@vger.kernel.org, Paolo Abeni , "David S . Miller" Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: intel-wired-lan-bounces@osuosl.org Sender: "Intel-wired-lan" Add enable/disable functions for TX and RX rings, will be used in later patches when AF_XDP zero-copy support is added. Signed-off-by: Sriram Yagnaraman --- drivers/net/ethernet/intel/igb/igb.h | 5 ++- drivers/net/ethernet/intel/igb/igb_main.c | 41 +++++++++++++++++++++++ 2 files changed, 45 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/intel/igb/igb.h b/drivers/net/ethernet/intel/igb/igb.h index 94440af6cf4b..5fa011c6ef2f 100644 --- a/drivers/net/ethernet/intel/igb/igb.h +++ b/drivers/net/ethernet/intel/igb/igb.h @@ -384,7 +384,8 @@ enum e1000_ring_flags_t { IGB_RING_FLAG_RX_SCTP_CSUM, IGB_RING_FLAG_RX_LB_VLAN_BSWAP, IGB_RING_FLAG_TX_CTX_IDX, - IGB_RING_FLAG_TX_DETECT_HANG + IGB_RING_FLAG_TX_DETECT_HANG, + IGB_RING_FLAG_TX_DISABLED }; #define ring_uses_large_buffer(ring) \ @@ -735,6 +736,8 @@ void igb_free_tx_resources(struct igb_ring *); void igb_free_rx_resources(struct igb_ring *); void igb_configure_tx_ring(struct igb_adapter *, struct igb_ring *); void igb_configure_rx_ring(struct igb_adapter *, struct igb_ring *); +void igb_txrx_ring_disable(struct igb_adapter *adapter, u16 qid); +void igb_txrx_ring_enable(struct igb_adapter *adapter, u16 qid); void igb_setup_tctl(struct igb_adapter *); void igb_setup_rctl(struct igb_adapter *); void igb_setup_srrctl(struct igb_adapter *, struct igb_ring *); diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c index dadc3d423cfd..391c0eb136d9 100644 --- a/drivers/net/ethernet/intel/igb/igb_main.c +++ b/drivers/net/ethernet/intel/igb/igb_main.c @@ -4856,6 +4856,47 @@ static void igb_configure_rx(struct igb_adapter *adapter) } } +void igb_txrx_ring_disable(struct igb_adapter *adapter, u16 qid) +{ + struct e1000_hw *hw = &adapter->hw; + struct igb_ring *tx_ring = adapter->tx_ring[qid]; + struct igb_ring *rx_ring = adapter->rx_ring[qid]; + + set_bit(IGB_RING_FLAG_TX_DISABLED, &tx_ring->flags); + + wr32(E1000_TXDCTL(tx_ring->reg_idx), 0); + wr32(E1000_RXDCTL(rx_ring->reg_idx), 0); + + /* Rx/Tx share the same napi context. */ + napi_disable(&rx_ring->q_vector->napi); + + igb_clean_tx_ring(tx_ring); + igb_clean_rx_ring(rx_ring); + + memset(&rx_ring->rx_stats, 0, sizeof(rx_ring->rx_stats)); + memset(&tx_ring->tx_stats, 0, sizeof(tx_ring->tx_stats)); +} + +void igb_txrx_ring_enable(struct igb_adapter *adapter, u16 qid) +{ + struct igb_ring *tx_ring = adapter->tx_ring[qid]; + struct igb_ring *rx_ring = adapter->rx_ring[qid]; + + /* Rx/Tx share the same napi context. */ + napi_enable(&rx_ring->q_vector->napi); + + igb_configure_tx_ring(adapter, tx_ring); + igb_configure_rx_ring(adapter, rx_ring); + + /* call igb_desc_unused which always leaves + * at least 1 descriptor unused to make sure + * next_to_use != next_to_clean + */ + igb_alloc_rx_buffers(rx_ring, igb_desc_unused(rx_ring)); + + clear_bit(IGB_RING_FLAG_TX_DISABLED, &tx_ring->flags); +} + /** * igb_free_tx_resources - Free Tx Resources per Queue * @tx_ring: Tx descriptor ring for a specific queue -- 2.34.1 _______________________________________________ Intel-wired-lan mailing list Intel-wired-lan@osuosl.org https://lists.osuosl.org/mailman/listinfo/intel-wired-lan