diff mbox series

[v4,07/10] net/ice: implement power management API

Message ID 1601647919-25312-7-git-send-email-liang.j.ma@intel.com (mailing list archive)
State Superseded, archived
Delegated to: Thomas Monjalon
Headers
Series [v4,01/10] eal: add new x86 cpuid support for WAITPKG |

Checks

Context Check Description
ci/checkpatch success coding style OK

Commit Message

Liang, Ma Oct. 2, 2020, 2:11 p.m. UTC 
  Implement support for the power management API by implementing a
`get_wake_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>
---
 drivers/net/ice/ice_ethdev.c |  1 +
 drivers/net/ice/ice_rxtx.c   | 23 +++++++++++++++++++++++
 drivers/net/ice/ice_rxtx.h   |  2 ++
 3 files changed, 26 insertions(+)
diff mbox series

Patch

diff --git a/drivers/net/ice/ice_ethdev.c b/drivers/net/ice/ice_ethdev.c
index d8ce09d28f..260de5dfd7 100644
--- a/drivers/net/ice/ice_ethdev.c
+++ b/drivers/net/ice/ice_ethdev.c
@@ -216,6 +216,7 @@  static const struct eth_dev_ops ice_eth_dev_ops = {
 	.udp_tunnel_port_add          = ice_dev_udp_tunnel_port_add,
 	.udp_tunnel_port_del          = ice_dev_udp_tunnel_port_del,
 	.tx_done_cleanup              = ice_tx_done_cleanup,
+	.get_wake_addr	              = ice_get_wake_addr,
 };
 
 /* store statistics names and its offset in stats structure */
diff --git a/drivers/net/ice/ice_rxtx.c b/drivers/net/ice/ice_rxtx.c
index 93a0ac6918..9e55eca942 100644
--- a/drivers/net/ice/ice_rxtx.c
+++ b/drivers/net/ice/ice_rxtx.c
@@ -25,6 +25,29 @@  uint64_t rte_net_ice_dynflag_proto_xtr_ipv6_flow_mask;
 uint64_t rte_net_ice_dynflag_proto_xtr_tcp_mask;
 uint64_t rte_net_ice_dynflag_proto_xtr_ip_offset_mask;
 
+int ice_get_wake_addr(void *rx_queue, volatile void **tail_desc_addr,
+		uint64_t *expected, uint64_t *mask)
+{
+	volatile union ice_rx_flex_desc *rxdp;
+	struct ice_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.status_error0;
+
+	/*
+	 * we expect the DD bit to be set to 1 if this descriptor was already
+	 * written to.
+	 */
+	*expected = rte_cpu_to_le_16(1 << ICE_RX_FLEX_DESC_STATUS0_DD_S);
+	*mask = rte_cpu_to_le_16(1 << ICE_RX_FLEX_DESC_STATUS0_DD_S);
+
+	return 0;
+}
+
+
 static inline uint8_t
 ice_proto_xtr_type_to_rxdid(uint8_t xtr_type)
 {
diff --git a/drivers/net/ice/ice_rxtx.h b/drivers/net/ice/ice_rxtx.h
index 1c23c7541e..c729e474c9 100644
--- a/drivers/net/ice/ice_rxtx.h
+++ b/drivers/net/ice/ice_rxtx.h
@@ -250,6 +250,8 @@  uint16_t ice_xmit_pkts_vec_avx2(void *tx_queue, struct rte_mbuf **tx_pkts,
 				uint16_t nb_pkts);
 int ice_fdir_programming(struct ice_pf *pf, struct ice_fltr_desc *fdir_desc);
 int ice_tx_done_cleanup(void *txq, uint32_t free_cnt);
+int ice_get_wake_addr(void *rx_queue, volatile void **tail_desc_addr,
+		      uint64_t *expected, uint64_t *mask);
 
 #define FDIR_PARSING_ENABLE_PER_QUEUE(ad, on) do { \
 	int i; \