From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from dpdk.org (dpdk.org [92.243.14.124]) by inbox.dpdk.org (Postfix) with ESMTP id 9BCB1A04BF; Thu, 3 Sep 2020 18:10:03 +0200 (CEST) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id C19FF1C1A8; Thu, 3 Sep 2020 18:07:21 +0200 (CEST) Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) by dpdk.org (Postfix) with ESMTP id 3457F1C1A7 for ; Thu, 3 Sep 2020 18:07:20 +0200 (CEST) IronPort-SDR: 9EABJ130i/rTo1UysMzT98C0zgR/I02J7HixTDg+xGboPfwSJJNOWjkLpWoVH4w8/DP5+OxAwj Y3hquVf2AH8A== X-IronPort-AV: E=McAfee;i="6000,8403,9733"; a="145344419" X-IronPort-AV: E=Sophos;i="5.76,387,1592895600"; d="scan'208";a="145344419" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by orsmga101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 03 Sep 2020 09:07:19 -0700 IronPort-SDR: LHUS5CJocWToBLyKzRZX7u4jo/gadMJ47eK0oBJLrTQeutsLXvsnk9/VgFg7D0T9e9SFJ0WTNG WtvlIe063rpA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.76,387,1592895600"; d="scan'208";a="334514219" Received: from irvmail001.ir.intel.com ([163.33.26.43]) by fmsmga002.fm.intel.com with ESMTP; 03 Sep 2020 09:07:17 -0700 Received: from sivswdev09.ir.intel.com (sivswdev09.ir.intel.com [10.237.217.48]) by irvmail001.ir.intel.com (8.14.3/8.13.6/MailSET/Hub) with ESMTP id 083G7H9E032341; Thu, 3 Sep 2020 17:07:17 +0100 Received: from sivswdev09.ir.intel.com (localhost [127.0.0.1]) by sivswdev09.ir.intel.com with ESMTP id 083G7HaD030583; Thu, 3 Sep 2020 17:07:17 +0100 Received: (from lma25@localhost) by sivswdev09.ir.intel.com with LOCAL id 083G7HXF030571; Thu, 3 Sep 2020 17:07:17 +0100 From: Liang Ma To: dev@dpdk.org Cc: david.hunt@intel.com, anatoly.burakov@intel.com, Liang Ma Date: Thu, 3 Sep 2020 17:07:03 +0100 Message-Id: <1599149224-30241-5-git-send-email-liang.j.ma@intel.com> X-Mailer: git-send-email 1.7.7.4 In-Reply-To: <1599149224-30241-1-git-send-email-liang.j.ma@intel.com> References: <1597141666-20621-1-git-send-email-liang.j.ma@intel.com> <1599149224-30241-1-git-send-email-liang.j.ma@intel.com> Subject: [dpdk-dev] [RFC PATCH v3 5/6] net/i40e: implement power management API X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" Implement support for the power management API by implementing a `next_rx_desc` function that will return an address of an RX ring's status bit. Signed-off-by: Liang Ma Signed-off-by: Anatoly Burakov --- drivers/net/i40e/i40e_ethdev.c | 1 + drivers/net/i40e/i40e_rxtx.c | 23 +++++++++++++++++++++++ drivers/net/i40e/i40e_rxtx.h | 2 ++ 3 files changed, 26 insertions(+) diff --git a/drivers/net/i40e/i40e_ethdev.c b/drivers/net/i40e/i40e_ethdev.c index 11c02b1888..94e9298d7c 100644 --- a/drivers/net/i40e/i40e_ethdev.c +++ b/drivers/net/i40e/i40e_ethdev.c @@ -517,6 +517,7 @@ static const struct eth_dev_ops i40e_eth_dev_ops = { .mtu_set = i40e_dev_mtu_set, .tm_ops_get = i40e_tm_ops_get, .tx_done_cleanup = i40e_tx_done_cleanup, + .next_rx_desc = i40e_next_rx_desc, }; /* store statistics names and its offset in stats structure */ diff --git a/drivers/net/i40e/i40e_rxtx.c b/drivers/net/i40e/i40e_rxtx.c index fe7f9200c1..9d7eea8aed 100644 --- a/drivers/net/i40e/i40e_rxtx.c +++ b/drivers/net/i40e/i40e_rxtx.c @@ -71,6 +71,29 @@ #define I40E_TX_OFFLOAD_NOTSUP_MASK \ (PKT_TX_OFFLOAD_MASK ^ I40E_TX_OFFLOAD_MASK) +int +i40e_next_rx_desc(void *rx_queue, volatile void **tail_desc_addr, + uint64_t *expected, uint64_t *mask) +{ + struct i40e_rx_queue *rxq = rx_queue; + volatile union i40e_rx_desc *rxdp; + uint16_t desc; + + desc = rxq->rx_tail; + rxdp = &rxq->rx_ring[desc]; + /* watch for changes in status bit */ + *tail_desc_addr = &rxdp->wb.qword1.status_error_len; + + /* + * we expect the DD bit to be set to 1 if this descriptor was already + * written to. + */ + *expected = rte_cpu_to_le_64(1 << I40E_RX_DESC_STATUS_DD_SHIFT); + *mask = rte_cpu_to_le_64(1 << I40E_RX_DESC_STATUS_DD_SHIFT); + + return 0; +} + static inline void i40e_rxd_to_vlan_tci(struct rte_mbuf *mb, volatile union i40e_rx_desc *rxdp) { diff --git a/drivers/net/i40e/i40e_rxtx.h b/drivers/net/i40e/i40e_rxtx.h index 57d7b4160b..bfda5b6ad3 100644 --- a/drivers/net/i40e/i40e_rxtx.h +++ b/drivers/net/i40e/i40e_rxtx.h @@ -248,6 +248,8 @@ uint16_t i40e_recv_scattered_pkts_vec_avx2(void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t nb_pkts); uint16_t i40e_xmit_pkts_vec_avx2(void *tx_queue, struct rte_mbuf **tx_pkts, uint16_t nb_pkts); +int i40e_next_rx_desc(void *rx_queue, volatile void **tail_desc_addr, + uint64_t *expected, uint64_t *value); /* For each value it means, datasheet of hardware can tell more details * -- 2.17.1