From a8f0df6bf98d295668b429f65884af887c2c5b77 Mon Sep 17 00:00:00 2001 From: Alexander Kozyrev Date: Thu, 29 Apr 2021 17:55:18 +0300 Subject: [PATCH] net/mlx5: support power monitoring Support the PMD power management API in MLX5 driver. The monitor policy of this API puts a CPU core to sleep until a data in some monitored memory address is changed by the NIC. Implement the get_monitor_addr function to return an address of a CQE owner bit to monitor the arrival of a new packet. Signed-off-by: Alexander Kozyrev Acked-by: Viacheslav Ovsiienko --- doc/guides/rel_notes/release_21_05.rst | 1 + drivers/net/mlx5/mlx5.c | 2 ++ drivers/net/mlx5/mlx5_rx.c | 19 +++++++++++++++++++ drivers/net/mlx5/mlx5_rx.h | 1 + 4 files changed, 23 insertions(+) diff --git a/doc/guides/rel_notes/release_21_05.rst b/doc/guides/rel_notes/release_21_05.rst index bcd4dd84fb..04c1244883 100644 --- a/doc/guides/rel_notes/release_21_05.rst +++ b/doc/guides/rel_notes/release_21_05.rst @@ -168,6 +168,7 @@ New Features * Added support for pre-defined meter policy API. * Added support for ASO (Advanced Steering Operation) meter. * Added support for ASO metering by PPS (packet per second). + * Added support for the monitor policy of Power Management API. * **Updated NXP DPAA driver.** diff --git a/drivers/net/mlx5/mlx5.c b/drivers/net/mlx5/mlx5.c index 10d44c7bbe..912b6a33b4 100644 --- a/drivers/net/mlx5/mlx5.c +++ b/drivers/net/mlx5/mlx5.c @@ -1617,6 +1617,7 @@ const struct eth_dev_ops mlx5_dev_ops = { .hairpin_queue_peer_update = mlx5_hairpin_queue_peer_update, .hairpin_queue_peer_bind = mlx5_hairpin_queue_peer_bind, .hairpin_queue_peer_unbind = mlx5_hairpin_queue_peer_unbind, + .get_monitor_addr = mlx5_get_monitor_addr, }; /* Available operations from secondary process. */ @@ -1701,6 +1702,7 @@ const struct eth_dev_ops mlx5_dev_ops_isolate = { .hairpin_queue_peer_update = mlx5_hairpin_queue_peer_update, .hairpin_queue_peer_bind = mlx5_hairpin_queue_peer_bind, .hairpin_queue_peer_unbind = mlx5_hairpin_queue_peer_unbind, + .get_monitor_addr = mlx5_get_monitor_addr, }; /** diff --git a/drivers/net/mlx5/mlx5_rx.c b/drivers/net/mlx5/mlx5_rx.c index e9fcb522e2..6cd71a44eb 100644 --- a/drivers/net/mlx5/mlx5_rx.c +++ b/drivers/net/mlx5/mlx5_rx.c @@ -269,6 +269,25 @@ mlx5_rx_queue_count(struct rte_eth_dev *dev, uint16_t rx_queue_id) return rx_queue_count(rxq); } +int mlx5_get_monitor_addr(void *rx_queue, struct rte_power_monitor_cond *pmc) +{ + struct mlx5_rxq_data *rxq = rx_queue; + const unsigned int cqe_num = 1 << rxq->cqe_n; + const unsigned int cqe_mask = cqe_num - 1; + const uint16_t idx = rxq->cq_ci & cqe_num; + volatile struct mlx5_cqe *cqe = &(*rxq->cqes)[rxq->cq_ci & cqe_mask]; + + if (unlikely(rxq->cqes == NULL)) { + rte_errno = EINVAL; + return -rte_errno; + } + pmc->addr = &cqe->op_own; + pmc->val = !!idx; + pmc->mask = MLX5_CQE_OWNER_MASK; + pmc->size = sizeof(uint8_t); + return 0; +} + /** * Translate RX completion flags to packet type. * diff --git a/drivers/net/mlx5/mlx5_rx.h b/drivers/net/mlx5/mlx5_rx.h index d5a2de84d1..1b264e5994 100644 --- a/drivers/net/mlx5/mlx5_rx.h +++ b/drivers/net/mlx5/mlx5_rx.h @@ -263,6 +263,7 @@ void mlx5_rxq_info_get(struct rte_eth_dev *dev, uint16_t queue_id, struct rte_eth_rxq_info *qinfo); int mlx5_rx_burst_mode_get(struct rte_eth_dev *dev, uint16_t rx_queue_id, struct rte_eth_burst_mode *mode); +int mlx5_get_monitor_addr(void *rx_queue, struct rte_power_monitor_cond *pmc); /* Vectorized version of mlx5_rx.c */ int mlx5_rxq_check_vec_support(struct mlx5_rxq_data *rxq_data); -- 2.20.1