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From: Anatoly Burakov <anatoly.burakov@intel.com>
To: dev@dpdk.org
Cc: Liang Ma <liang.j.ma@intel.com>, Beilei Xing <beilei.xing@intel.com>,
Jeff Guo <jia.guo@intel.com>, thomas@monjalon.net,
konstantin.ananyev@intel.com, gage.eads@intel.com,
timothy.mcdaniel@intel.com, david.hunt@intel.com,
bruce.richardson@intel.com, chris.macnamara@intel.com
Date: Thu, 17 Dec 2020 14:05:39 +0000
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<cover.1608213657.git.anatoly.burakov@intel.com>
Subject: [dpdk-dev] [PATCH v12 09/11] net/i40e: implement power management
API
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From: Liang Ma <liang.j.ma@intel.com>
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>
---
drivers/net/i40e/i40e_ethdev.c | 1 +
drivers/net/i40e/i40e_rxtx.c | 25 +++++++++++++++++++++++++
drivers/net/i40e/i40e_rxtx.h | 1 +
3 files changed, 27 insertions(+)
diff --git a/drivers/net/i40e/i40e_ethdev.c b/drivers/net/i40e/i40e_ethdev.c
index f54769c29d..af2577a140 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
*
--
2.17.1