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