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...@intel.com>
Signed-off-by: Anatoly Burakov <anatoly.bura...@intel.com>
Acked-by: Konstantin Ananyev <konstantin.anan...@intel.com>
Acked-by: Jeff Guo <jia....@intel.com>
---
drivers/net/i40e/i40e_ethdev.c | 1 +
drivers/net/i40e/i40e_rxtx.c | 26 ++++++++++++++++++++++++++
drivers/net/i40e/i40e_rxtx.h | 2 ++
3 files changed, 29 insertions(+)
diff --git a/drivers/net/i40e/i40e_ethdev.c b/drivers/net/i40e/i40e_ethdev.c
index 4778aaf299..358a38232b 100644
--- a/drivers/net/i40e/i40e_ethdev.c
+++ b/drivers/net/i40e/i40e_ethdev.c
@@ -513,6 +513,7 @@ 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_wake_addr = i40e_get_wake_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..78862fe3a2 100644
--- a/drivers/net/i40e/i40e_rxtx.c
+++ b/drivers/net/i40e/i40e_rxtx.c
@@ -72,6 +72,32 @@
#define I40E_TX_OFFLOAD_NOTSUP_MASK \
(PKT_TX_OFFLOAD_MASK ^ I40E_TX_OFFLOAD_MASK)
+int
+i40e_get_wake_addr(void *rx_queue, volatile void **tail_desc_addr,
+ uint64_t *expected, uint64_t *mask, uint8_t *data_sz)
+{
+ 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);
+
+ /* registers are 64-bit */
+ *data_sz = 8;
+
+ 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..5826cf1099 100644
--- a/drivers/net/i40e/i40e_rxtx.h
+++ b/drivers/net/i40e/i40e_rxtx.h
@@ -248,6 +248,8 @@ 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_get_wake_addr(void *rx_queue, volatile void **tail_desc_addr,
+ uint64_t *expected, uint64_t *value, uint8_t *data_sz);
/* For each value it means, datasheet of hardware can tell more details
*
--
2.17.1
