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 34D40A00BE; Wed, 27 May 2020 19:03:09 +0200 (CEST) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id 5B9CE1DB07; Wed, 27 May 2020 19:02:24 +0200 (CEST) Received: from mga01.intel.com (mga01.intel.com [192.55.52.88]) by dpdk.org (Postfix) with ESMTP id 446461DAEC for ; Wed, 27 May 2020 19:02:17 +0200 (CEST) IronPort-SDR: Ybw2O7+uzq1X8y33FylIEO/mc7wAawi/yWvHv3i6gSwldj2ZYWpItjJE37byoOO9umA/FaNaL1 Q5/DNLz/eF+w== X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga005.jf.intel.com ([10.7.209.41]) by fmsmga101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 27 May 2020 10:02:13 -0700 IronPort-SDR: 654HCFdXzpkXQHm1lpqjwTiIhVglT9xOfDEWdqqzMWkROOUKhsFocBShcOEy8h9aKn5SZSeOln C5CImXfchjUg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.73,442,1583222400"; d="scan'208";a="442595982" Received: from silpixa00399498.ir.intel.com (HELO silpixa00399498.ger.corp.intel.com) ([10.237.222.52]) by orsmga005.jf.intel.com with ESMTP; 27 May 2020 10:02:05 -0700 From: Anatoly Burakov To: dev@dpdk.org Cc: Beilei Xing , Jeff Guo , david.hunt@intel.com, liang.j.ma@intel.com Date: Wed, 27 May 2020 18:02:04 +0100 Message-Id: X-Mailer: git-send-email 2.17.1 In-Reply-To: References: In-Reply-To: References: Subject: [dpdk-dev] [RFC 4/6] 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 J. 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 749d85f544..f3ce54911b 100644 --- a/drivers/net/i40e/i40e_ethdev.c +++ b/drivers/net/i40e/i40e_ethdev.c @@ -526,6 +526,7 @@ 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 5e7c86ed82..76dfbb2098 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 8f11f011a7..72d810475b 100644 --- a/drivers/net/i40e/i40e_rxtx.h +++ b/drivers/net/i40e/i40e_rxtx.h @@ -245,6 +245,8 @@ 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