[RFC,3/6] net/ixgbe: implement power management API
diff mbox series

Message ID a58985061ef6670b02523380e908e52db36f4530.1590598121.git.anatoly.burakov@intel.com
State New
Delegated to: Thomas Monjalon
Headers show
Series
  • Power-optimized RX for Ethernet devices
Related show

Checks

Context Check Description
ci/Intel-compilation success Compilation OK
ci/checkpatch success coding style OK

Commit Message

Anatoly Burakov May 27, 2020, 5:02 p.m. UTC
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: Anatoly Burakov <anatoly.burakov@intel.com>
---
 drivers/net/ixgbe/ixgbe_ethdev.c |  1 +
 drivers/net/ixgbe/ixgbe_rxtx.c   | 22 ++++++++++++++++++++++
 drivers/net/ixgbe/ixgbe_rxtx.h   |  2 ++
 3 files changed, 25 insertions(+)

Patch
diff mbox series

diff --git a/drivers/net/ixgbe/ixgbe_ethdev.c b/drivers/net/ixgbe/ixgbe_ethdev.c
index a4e5c539de..190d11d98d 100644
--- a/drivers/net/ixgbe/ixgbe_ethdev.c
+++ b/drivers/net/ixgbe/ixgbe_ethdev.c
@@ -605,6 +605,7 @@  static const struct eth_dev_ops ixgbe_eth_dev_ops = {
 	.udp_tunnel_port_del  = ixgbe_dev_udp_tunnel_port_del,
 	.tm_ops_get           = ixgbe_tm_ops_get,
 	.tx_done_cleanup      = ixgbe_dev_tx_done_cleanup,
+	.next_rx_desc         = ixgbe_next_rx_desc,
 };
 
 /*
diff --git a/drivers/net/ixgbe/ixgbe_rxtx.c b/drivers/net/ixgbe/ixgbe_rxtx.c
index 2e20e18c7a..ef2fb5fca9 100644
--- a/drivers/net/ixgbe/ixgbe_rxtx.c
+++ b/drivers/net/ixgbe/ixgbe_rxtx.c
@@ -1366,6 +1366,28 @@  const uint32_t
 		RTE_PTYPE_INNER_L3_IPV4_EXT | RTE_PTYPE_INNER_L4_UDP,
 };
 
+int ixgbe_next_rx_desc(void *rx_queue, volatile void **tail_desc_addr,
+		uint64_t *expected, uint64_t *mask)
+{
+	volatile union ixgbe_adv_rx_desc *rxdp;
+	struct ixgbe_rx_queue *rxq = rx_queue;
+	uint16_t desc;
+
+	desc = rxq->rx_tail;
+	rxdp = &rxq->rx_ring[desc];
+	/* watch for changes in status bit */
+	*tail_desc_addr = &rxdp->wb.upper.status_error;
+
+	/*
+	 * we expect the DD bit to be set to 1 if this descriptor was already
+	 * written to.
+	 */
+	*expected = rte_cpu_to_le_32(IXGBE_RXDADV_STAT_DD);
+	*mask = rte_cpu_to_le_32(IXGBE_RXDADV_STAT_DD);
+
+	return 0;
+}
+
 /* @note: fix ixgbe_dev_supported_ptypes_get() if any change here. */
 static inline uint32_t
 ixgbe_rxd_pkt_info_to_pkt_type(uint32_t pkt_info, uint16_t ptype_mask)
diff --git a/drivers/net/ixgbe/ixgbe_rxtx.h b/drivers/net/ixgbe/ixgbe_rxtx.h
index 20a8b291d4..6c35966c78 100644
--- a/drivers/net/ixgbe/ixgbe_rxtx.h
+++ b/drivers/net/ixgbe/ixgbe_rxtx.h
@@ -299,5 +299,7 @@  uint64_t ixgbe_get_tx_port_offloads(struct rte_eth_dev *dev);
 uint64_t ixgbe_get_rx_queue_offloads(struct rte_eth_dev *dev);
 uint64_t ixgbe_get_rx_port_offloads(struct rte_eth_dev *dev);
 uint64_t ixgbe_get_tx_queue_offloads(struct rte_eth_dev *dev);
+int ixgbe_next_rx_desc(void *rx_queue, volatile void **tail_desc_addr,
+		uint64_t *expected, uint64_t *mask);
 
 #endif /* _IXGBE_RXTX_H_ */