From: Liang Ma <liang.j.ma@intel.com>
Date: Thu, 14 Jan 2021 14:46:11 +0000 (+0000)
Subject: net/i40e: implement power management API
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=a683abf90a22;p=dpdk.git

net/i40e: implement power management API

Implement support for the power management API by implementing a
`get_monitor_addr` function that will return an address of an RX ring's
status bit.

Signed-off-by: Liang Ma <liang.j.ma@intel.com>
Signed-off-by: Anatoly Burakov <anatoly.burakov@intel.com>
Acked-by: Konstantin Ananyev <konstantin.ananyev@intel.com>
Acked-by: Jeff Guo <jia.guo@intel.com>
---

diff --git a/drivers/net/i40e/i40e_ethdev.c b/drivers/net/i40e/i40e_ethdev.c
index 14622484a0..ba1abc584f 100644
--- a/drivers/net/i40e/i40e_ethdev.c
+++ b/drivers/net/i40e/i40e_ethdev.c
@@ -510,6 +510,7 @@ 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,
+	.get_monitor_addr             = i40e_get_monitor_addr,
 };
 
 /* 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 5df9a9df56..0b4220fc9c 100644
--- a/drivers/net/i40e/i40e_rxtx.c
+++ b/drivers/net/i40e/i40e_rxtx.c
@@ -72,6 +72,31 @@
 #define I40E_TX_OFFLOAD_NOTSUP_MASK \
 		(PKT_TX_OFFLOAD_MASK ^ I40E_TX_OFFLOAD_MASK)
 
+int
+i40e_get_monitor_addr(void *rx_queue, struct rte_power_monitor_cond *pmc)
+{
+	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 */
+	pmc->addr = &rxdp->wb.qword1.status_error_len;
+
+	/*
+	 * we expect the DD bit to be set to 1 if this descriptor was already
+	 * written to.
+	 */
+	pmc->val = rte_cpu_to_le_64(1 << I40E_RX_DESC_STATUS_DD_SHIFT);
+	pmc->mask = rte_cpu_to_le_64(1 << I40E_RX_DESC_STATUS_DD_SHIFT);
+
+	/* registers are 64-bit */
+	pmc->data_sz = sizeof(uint64_t);
+
+	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..e1494525ce 100644
--- a/drivers/net/i40e/i40e_rxtx.h
+++ b/drivers/net/i40e/i40e_rxtx.h
@@ -248,6 +248,7 @@ 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_get_monitor_addr(void *rx_queue, struct rte_power_monitor_cond *pmc);
 
 /* For each value it means, datasheet of hardware can tell more details
  *