From 43fb6eea496e6e116b1d29a44f0e0ff0bc73b894 Mon Sep 17 00:00:00 2001 From: Anatoly Burakov Date: Fri, 9 Jul 2021 16:08:11 +0000 Subject: [PATCH] net/af_xdp: support power monitoring Implement support for .get_monitor_addr in AF_XDP driver. Signed-off-by: Anatoly Burakov --- doc/guides/nics/features/af_xdp.ini | 1 + drivers/net/af_xdp/rte_eth_af_xdp.c | 34 +++++++++++++++++++++++++++++ 2 files changed, 35 insertions(+) diff --git a/doc/guides/nics/features/af_xdp.ini b/doc/guides/nics/features/af_xdp.ini index 36953c2dec..54b738e616 100644 --- a/doc/guides/nics/features/af_xdp.ini +++ b/doc/guides/nics/features/af_xdp.ini @@ -5,6 +5,7 @@ ; [Features] Link status = Y +Power mgmt address monitor = Y MTU update = Y Promiscuous mode = Y Stats per queue = Y diff --git a/drivers/net/af_xdp/rte_eth_af_xdp.c b/drivers/net/af_xdp/rte_eth_af_xdp.c index eb5660a3dc..74ffa45112 100644 --- a/drivers/net/af_xdp/rte_eth_af_xdp.c +++ b/drivers/net/af_xdp/rte_eth_af_xdp.c @@ -37,6 +37,7 @@ #include #include #include +#include #include "compat.h" @@ -788,6 +789,38 @@ eth_dev_configure(struct rte_eth_dev *dev) return 0; } +#define CLB_VAL_IDX 0 +static int +eth_monitor_callback(const uint64_t value, + const uint64_t opaque[RTE_POWER_MONITOR_OPAQUE_SZ]) +{ + const uint64_t v = opaque[CLB_VAL_IDX]; + const uint64_t m = (uint32_t)~0; + + /* if the value has changed, abort entering power optimized state */ + return (value & m) == v ? 0 : -1; +} + +static int +eth_get_monitor_addr(void *rx_queue, struct rte_power_monitor_cond *pmc) +{ + struct pkt_rx_queue *rxq = rx_queue; + unsigned int *prod = rxq->rx.producer; + const uint32_t cur_val = rxq->rx.cached_prod; /* use cached value */ + + /* watch for changes in producer ring */ + pmc->addr = (void *)prod; + + /* store current value */ + pmc->opaque[CLB_VAL_IDX] = cur_val; + pmc->fn = eth_monitor_callback; + + /* AF_XDP producer ring index is 32-bit */ + pmc->size = sizeof(uint32_t); + + return 0; +} + static int eth_dev_info(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info) { @@ -1448,6 +1481,7 @@ static const struct eth_dev_ops ops = { .link_update = eth_link_update, .stats_get = eth_stats_get, .stats_reset = eth_stats_reset, + .get_monitor_addr = eth_get_monitor_addr, }; /** parse busy_budget argument */ -- 2.20.1