From 3199a7f6a38cbe0c9a362b29dbf2679970f11c3a Mon Sep 17 00:00:00 2001 From: Sunil Kumar Kori Date: Wed, 23 Jun 2021 10:16:59 +0530 Subject: [PATCH] net/cnxk: support clock read Patch implements read raw clock operation for cn9k and cn10k. Signed-off-by: Sunil Kumar Kori --- doc/guides/nics/features/cnxk.ini | 2 ++ drivers/net/cnxk/cnxk_ethdev.c | 1 + drivers/net/cnxk/cnxk_ethdev.h | 1 + drivers/net/cnxk/cnxk_ptp.c | 17 +++++++++++++++++ 4 files changed, 21 insertions(+) diff --git a/doc/guides/nics/features/cnxk.ini b/doc/guides/nics/features/cnxk.ini index 9ef9c77a30..b1564221cc 100644 --- a/doc/guides/nics/features/cnxk.ini +++ b/doc/guides/nics/features/cnxk.ini @@ -32,6 +32,8 @@ L4 checksum offload = Y Inner L3 checksum = Y Inner L4 checksum = Y Packet type parsing = Y +Timesync = Y +Timestamp offload = Y Basic stats = Y Stats per queue = Y Extended stats = Y diff --git a/drivers/net/cnxk/cnxk_ethdev.c b/drivers/net/cnxk/cnxk_ethdev.c index c8bbb7a831..b2a8f3a744 100644 --- a/drivers/net/cnxk/cnxk_ethdev.c +++ b/drivers/net/cnxk/cnxk_ethdev.c @@ -1265,6 +1265,7 @@ struct eth_dev_ops cnxk_eth_dev_ops = { .timesync_read_time = cnxk_nix_timesync_read_time, .timesync_write_time = cnxk_nix_timesync_write_time, .timesync_adjust_time = cnxk_nix_timesync_adjust_time, + .read_clock = cnxk_nix_read_clock, }; static int diff --git a/drivers/net/cnxk/cnxk_ethdev.h b/drivers/net/cnxk/cnxk_ethdev.h index 4214365f8d..fa6f16f733 100644 --- a/drivers/net/cnxk/cnxk_ethdev.h +++ b/drivers/net/cnxk/cnxk_ethdev.h @@ -323,6 +323,7 @@ int cnxk_nix_timesync_write_time(struct rte_eth_dev *eth_dev, const struct timespec *ts); int cnxk_nix_timesync_adjust_time(struct rte_eth_dev *eth_dev, int64_t delta); int cnxk_nix_tsc_convert(struct cnxk_eth_dev *dev); +int cnxk_nix_read_clock(struct rte_eth_dev *eth_dev, uint64_t *clock); uint64_t cnxk_nix_rxq_mbuf_setup(struct cnxk_eth_dev *dev); diff --git a/drivers/net/cnxk/cnxk_ptp.c b/drivers/net/cnxk/cnxk_ptp.c index 52f6eb1442..449489f599 100644 --- a/drivers/net/cnxk/cnxk_ptp.c +++ b/drivers/net/cnxk/cnxk_ptp.c @@ -4,6 +4,23 @@ #include "cnxk_ethdev.h" +int +cnxk_nix_read_clock(struct rte_eth_dev *eth_dev, uint64_t *clock) +{ + struct cnxk_eth_dev *dev = cnxk_eth_pmd_priv(eth_dev); + + /* This API returns the raw PTP HI clock value. Since LFs do not + * have direct access to PTP registers and it requires mbox msg + * to AF for this value. In fastpath reading this value for every + * packet (which involes mbox call) becomes very expensive, hence + * we should be able to derive PTP HI clock value from tsc by + * using freq_mult and clk_delta calculated during configure stage. + */ + *clock = (rte_get_tsc_cycles() + dev->clk_delta) * dev->clk_freq_mult; + + return 0; +} + /* This function calculates two parameters "clk_freq_mult" and * "clk_delta" which is useful in deriving PTP HI clock from * timestamp counter (tsc) value. -- 2.20.1