From 48391fa16592b47d37ef63466111c751a10c3e56 Mon Sep 17 00:00:00 2001 From: Ido Schimmel Date: Tue, 23 Nov 2021 19:41:02 +0200 Subject: [PATCH 34/35] sff-8636: Print Power set and Power override bits Print the SFF-8636 Power set and Power override bits when dumping EEPROM contents via the '-m' option. They can be used to understand low power mode enforcement by the host. The 'SFF8636_LOW_PWR_MODE' define is renamed to 'SFF8636_LOW_PWR_SET' to reflect its naming in the standard for QSFP+/QSFP28. Example output: # ethtool -m swp13 Identifier : 0x11 (QSFP28) ... Extended identifier description : 5.0W max. Power consumption, High Power Class (> 3.5 W) enabled Power set : Off Power override : On ... Transmit avg optical power (Channel 1) : 0.7633 mW / -1.17 dBm Transmit avg optical power (Channel 2) : 0.7649 mW / -1.16 dBm Transmit avg optical power (Channel 3) : 0.7696 mW / -1.14 dBm Transmit avg optical power (Channel 4) : 0.7739 mW / -1.11 dBm Rcvr signal avg optical power(Channel 1) : 0.9240 mW / -0.34 dBm Rcvr signal avg optical power(Channel 2) : 0.9129 mW / -0.40 dBm Rcvr signal avg optical power(Channel 3) : 0.9194 mW / -0.36 dBm Rcvr signal avg optical power(Channel 4) : 0.8708 mW / -0.60 dBm # ethtool --set-module swp13 power-mode-policy auto # ethtool -m swp13 Identifier : 0x11 (QSFP28) ... Extended identifier description : 5.0W max. Power consumption, High Power Class (> 3.5 W) not enabled Power set : On Power override : On ... Transmit avg optical power (Channel 1) : 0.0000 mW / -inf dBm Transmit avg optical power (Channel 2) : 0.0000 mW / -inf dBm Transmit avg optical power (Channel 3) : 0.0000 mW / -inf dBm Transmit avg optical power (Channel 4) : 0.0000 mW / -inf dBm Rcvr signal avg optical power(Channel 1) : 0.0000 mW / -inf dBm Rcvr signal avg optical power(Channel 2) : 0.0000 mW / -inf dBm Rcvr signal avg optical power(Channel 3) : 0.0000 mW / -inf dBm Rcvr signal avg optical power(Channel 4) : 0.0000 mW / -inf dBm # ethtool --set-module swp13 power-mode-policy high # ethtool -m swp13 Identifier : 0x11 (QSFP28) ... Extended identifier description : 5.0W max. Power consumption, High Power Class (> 3.5 W) enabled Power set : Off Power override : On ... Transmit avg optical power (Channel 1) : 0.7733 mW / -1.12 dBm Transmit avg optical power (Channel 2) : 0.7754 mW / -1.10 dBm Transmit avg optical power (Channel 3) : 0.7885 mW / -1.03 dBm Transmit avg optical power (Channel 4) : 0.7886 mW / -1.03 dBm Rcvr signal avg optical power(Channel 1) : 0.9248 mW / -0.34 dBm Rcvr signal avg optical power(Channel 2) : 0.9129 mW / -0.40 dBm Rcvr signal avg optical power(Channel 3) : 0.9187 mW / -0.37 dBm Rcvr signal avg optical power(Channel 4) : 0.8785 mW / -0.56 dBm In the above example, the LPMode signal is ignored (Power override is always on) and low power mode is controlled via software only. Signed-off-by: Ido Schimmel --- qsfp.c | 6 ++++++ qsfp.h | 2 +- 2 files changed, 7 insertions(+), 1 deletion(-) diff --git a/qsfp.c b/qsfp.c index b3c9e1516af9..57aac86bd5f6 100644 --- a/qsfp.c +++ b/qsfp.c @@ -268,6 +268,12 @@ static void sff8636_show_ext_identifier(const struct sff8636_memory_map *map) printf(" High Power Class (> 3.5 W) enabled\n"); else printf(" High Power Class (> 3.5 W) not enabled\n"); + printf("\t%-41s : ", "Power set"); + printf("%s\n", ONOFF(map->lower_memory[SFF8636_PWR_MODE_OFFSET] & + SFF8636_LOW_PWR_SET)); + printf("\t%-41s : ", "Power override"); + printf("%s\n", ONOFF(map->lower_memory[SFF8636_PWR_MODE_OFFSET] & + SFF8636_PWR_OVERRIDE)); } static void sff8636_show_connector(const struct sff8636_memory_map *map) diff --git a/qsfp.h b/qsfp.h index 1d8f24b5cbc2..aabf09fdc623 100644 --- a/qsfp.h +++ b/qsfp.h @@ -180,7 +180,7 @@ #define SFF8636_PWR_MODE_OFFSET 0x5D #define SFF8636_HIGH_PWR_ENABLE (1 << 2) -#define SFF8636_LOW_PWR_MODE (1 << 1) +#define SFF8636_LOW_PWR_SET (1 << 1) #define SFF8636_PWR_OVERRIDE (1 << 0) #define SFF8636_TX_APP_SELECT_4_OFFSET 0x5E -- 2.35.1