From 0b45f392c6c92e9823d6332622d7a45e7a36365e Mon Sep 17 00:00:00 2001

From: Ido Schimmel <idosch@nvidia.com>

Date: Tue, 23 Nov 2021 19:41:01 +0200

Subject: [PATCH 33/35] cmis: Print Module-Level Controls

Print the CMIS Module-Level Controls when dumping EEPROM contents via

the '-m' option. It can be used to understand low power mode enforcement

by the host.

Example output:

 # ethtool -m swp11

 Identifier                                : 0x18 (QSFP-DD Double Density 8X Pluggable Transceiver (INF-8628))

 ...

 Module State                              : 0x03 (ModuleReady)

 LowPwrAllowRequestHW                      : Off

 LowPwrRequestSW                           : Off

 ...

 Transmit avg optical power (Channel 1)    : 1.3222 mW / 1.21 dBm

 Transmit avg optical power (Channel 2)    : 1.2666 mW / 1.03 dBm

 Transmit avg optical power (Channel 3)    : 1.2860 mW / 1.09 dBm

 Transmit avg optical power (Channel 4)    : 1.2988 mW / 1.14 dBm

 Transmit avg optical power (Channel 5)    : 1.2828 mW / 1.08 dBm

 Transmit avg optical power (Channel 6)    : 1.2913 mW / 1.11 dBm

 Transmit avg optical power (Channel 7)    : 1.2636 mW / 1.02 dBm

 Transmit avg optical power (Channel 8)    : 1.3408 mW / 1.27 dBm

 Transmit avg optical power (Channel 9)    : 1.3222 mW / 1.21 dBm

 Transmit avg optical power (Channel 10)   : 1.2666 mW / 1.03 dBm

 Transmit avg optical power (Channel 11)   : 1.2860 mW / 1.09 dBm

 Transmit avg optical power (Channel 12)   : 1.2988 mW / 1.14 dBm

 Transmit avg optical power (Channel 13)   : 1.2828 mW / 1.08 dBm

 Transmit avg optical power (Channel 14)   : 1.2913 mW / 1.11 dBm

 Transmit avg optical power (Channel 15)   : 1.2636 mW / 1.02 dBm

 Transmit avg optical power (Channel 16)   : 1.3408 mW / 1.27 dBm

 Rcvr signal avg optical power (Channel 1) : 1.1351 mW / 0.55 dBm

 Rcvr signal avg optical power (Channel 2) : 1.1603 mW / 0.65 dBm

 Rcvr signal avg optical power (Channel 3) : 1.1529 mW / 0.62 dBm

 Rcvr signal avg optical power (Channel 4) : 1.1670 mW / 0.67 dBm

 Rcvr signal avg optical power (Channel 5) : 1.1759 mW / 0.70 dBm

 Rcvr signal avg optical power (Channel 6) : 1.1744 mW / 0.70 dBm

 Rcvr signal avg optical power (Channel 7) : 1.1188 mW / 0.49 dBm

 Rcvr signal avg optical power (Channel 8) : 1.1640 mW / 0.66 dBm

 Rcvr signal avg optical power (Channel 9) : 1.1351 mW / 0.55 dBm

 Rcvr signal avg optical power (Channel 10) : 1.1603 mW / 0.65 dBm

 Rcvr signal avg optical power (Channel 11) : 1.1529 mW / 0.62 dBm

 Rcvr signal avg optical power (Channel 12) : 1.1670 mW / 0.67 dBm

 Rcvr signal avg optical power (Channel 13) : 1.1759 mW / 0.70 dBm

 Rcvr signal avg optical power (Channel 14) : 1.1744 mW / 0.70 dBm

 Rcvr signal avg optical power (Channel 15) : 1.1188 mW / 0.49 dBm

 Rcvr signal avg optical power (Channel 16) : 1.1640 mW / 0.66 dBm

 # ethtool --set-module swp11 power-mode-policy auto

 # ethtool -m swp11

 Identifier                                : 0x18 (QSFP-DD Double Density 8X Pluggable Transceiver (INF-8628))

 ...

 Module State                              : 0x01 (ModuleLowPwr)

 LowPwrAllowRequestHW                      : Off

 LowPwrRequestSW                           : On

 ...

 Transmit avg optical power (Channel 1)    : 0.0001 mW / -40.00 dBm

 Transmit avg optical power (Channel 2)    : 0.0001 mW / -40.00 dBm

 Transmit avg optical power (Channel 3)    : 0.0001 mW / -40.00 dBm

 Transmit avg optical power (Channel 4)    : 0.0001 mW / -40.00 dBm

 Transmit avg optical power (Channel 5)    : 0.0001 mW / -40.00 dBm

 Transmit avg optical power (Channel 6)    : 0.0001 mW / -40.00 dBm

 Transmit avg optical power (Channel 7)    : 0.0001 mW / -40.00 dBm

 Transmit avg optical power (Channel 8)    : 0.0001 mW / -40.00 dBm

 Transmit avg optical power (Channel 9)    : 0.0001 mW / -40.00 dBm

 Transmit avg optical power (Channel 10)   : 0.0001 mW / -40.00 dBm

 Transmit avg optical power (Channel 11)   : 0.0001 mW / -40.00 dBm

 Transmit avg optical power (Channel 12)   : 0.0001 mW / -40.00 dBm

 Transmit avg optical power (Channel 13)   : 0.0001 mW / -40.00 dBm

 Transmit avg optical power (Channel 14)   : 0.0001 mW / -40.00 dBm

 Transmit avg optical power (Channel 15)   : 0.0001 mW / -40.00 dBm

 Transmit avg optical power (Channel 16)   : 0.0001 mW / -40.00 dBm

 Rcvr signal avg optical power (Channel 1) : 0.0001 mW / -40.00 dBm

 Rcvr signal avg optical power (Channel 2) : 0.0001 mW / -40.00 dBm

 Rcvr signal avg optical power (Channel 3) : 0.0001 mW / -40.00 dBm

 Rcvr signal avg optical power (Channel 4) : 0.0001 mW / -40.00 dBm

 Rcvr signal avg optical power (Channel 5) : 0.0001 mW / -40.00 dBm

 Rcvr signal avg optical power (Channel 6) : 0.0001 mW / -40.00 dBm

 Rcvr signal avg optical power (Channel 7) : 0.0001 mW / -40.00 dBm

 Rcvr signal avg optical power (Channel 8) : 0.0001 mW / -40.00 dBm

 Rcvr signal avg optical power (Channel 9) : 0.0001 mW / -40.00 dBm

 Rcvr signal avg optical power (Channel 10) : 0.0001 mW / -40.00 dBm

 Rcvr signal avg optical power (Channel 11) : 0.0001 mW / -40.00 dBm

 Rcvr signal avg optical power (Channel 12) : 0.0001 mW / -40.00 dBm

 Rcvr signal avg optical power (Channel 13) : 0.0001 mW / -40.00 dBm

 Rcvr signal avg optical power (Channel 14) : 0.0001 mW / -40.00 dBm

 Rcvr signal avg optical power (Channel 15) : 0.0001 mW / -40.00 dBm

 Rcvr signal avg optical power (Channel 16) : 0.0001 mW / -40.00 dBm

 # ethtool --set-module swp11 power-mode-policy high

 # ethtool -m swp11

 Identifier                                : 0x18 (QSFP-DD Double Density 8X Pluggable Transceiver (INF-8628))

 ...

 Module State                              : 0x03 (ModuleReady)

 LowPwrAllowRequestHW                      : Off

 LowPwrRequestSW                           : Off

 ...

 Transmit avg optical power (Channel 1)    : 1.3690 mW / 1.36 dBm

 Transmit avg optical power (Channel 2)    : 1.3036 mW / 1.15 dBm

 Transmit avg optical power (Channel 3)    : 1.3358 mW / 1.26 dBm

 Transmit avg optical power (Channel 4)    : 1.3509 mW / 1.31 dBm

 Transmit avg optical power (Channel 5)    : 1.3193 mW / 1.20 dBm

 Transmit avg optical power (Channel 6)    : 1.3314 mW / 1.24 dBm

 Transmit avg optical power (Channel 7)    : 1.3042 mW / 1.15 dBm

 Transmit avg optical power (Channel 8)    : 1.3919 mW / 1.44 dBm

 Transmit avg optical power (Channel 9)    : 1.3690 mW / 1.36 dBm

 Transmit avg optical power (Channel 10)   : 1.3036 mW / 1.15 dBm

 Transmit avg optical power (Channel 11)   : 1.3358 mW / 1.26 dBm

 Transmit avg optical power (Channel 12)   : 1.3509 mW / 1.31 dBm

 Transmit avg optical power (Channel 13)   : 1.3193 mW / 1.20 dBm

 Transmit avg optical power (Channel 14)   : 1.3314 mW / 1.24 dBm

 Transmit avg optical power (Channel 15)   : 1.3042 mW / 1.15 dBm

 Transmit avg optical power (Channel 16)   : 1.3919 mW / 1.44 dBm

 Rcvr signal avg optical power (Channel 1) : 1.1299 mW / 0.53 dBm

 Rcvr signal avg optical power (Channel 2) : 1.1566 mW / 0.63 dBm

 Rcvr signal avg optical power (Channel 3) : 1.1484 mW / 0.60 dBm

 Rcvr signal avg optical power (Channel 4) : 1.1655 mW / 0.67 dBm

 Rcvr signal avg optical power (Channel 5) : 1.1751 mW / 0.70 dBm

 Rcvr signal avg optical power (Channel 6) : 1.1595 mW / 0.64 dBm

 Rcvr signal avg optical power (Channel 7) : 1.1158 mW / 0.48 dBm

 Rcvr signal avg optical power (Channel 8) : 1.1595 mW / 0.64 dBm

 Rcvr signal avg optical power (Channel 9) : 1.1299 mW / 0.53 dBm

 Rcvr signal avg optical power (Channel 10) : 1.1566 mW / 0.63 dBm

 Rcvr signal avg optical power (Channel 11) : 1.1484 mW / 0.60 dBm

 Rcvr signal avg optical power (Channel 12) : 1.1655 mW / 0.67 dBm

 Rcvr signal avg optical power (Channel 13) : 1.1751 mW / 0.70 dBm

 Rcvr signal avg optical power (Channel 14) : 1.1595 mW / 0.64 dBm

 Rcvr signal avg optical power (Channel 15) : 1.1158 mW / 0.48 dBm

 Rcvr signal avg optical power (Channel 16) : 1.1595 mW / 0.64 dBm

In the above example, the LowPwrRequestHW signal is ignored and low

power mode is controlled via software only.

Signed-off-by: Ido Schimmel <idosch@nvidia.com>

---

 cmis.c | 15 +++++++++++++++

 cmis.h |  5 +++++

 2 files changed, 20 insertions(+)

diff --git a/cmis.c b/cmis.c

index a32cc9f8b1f6..d0b62728e998 100644

--- a/cmis.c

+++ b/cmis.c

@@ -470,6 +470,20 @@ static void cmis_show_mod_fault_cause(const struct cmis_memory_map *map)

 	}

 }

+/* Print the current Module-Level Controls. Relevant documents:

+ * [1] CMIS Rev. 5, pag. 58, section 6.3.2.2, Table 6-12

+ * [2] CMIS Rev. 5, pag. 111, section 8.2.6, Table 8-10

+ */

+static void cmis_show_mod_lvl_controls(const struct cmis_memory_map *map)

+{

+	printf("\t%-41s : ", "LowPwrAllowRequestHW");

+	printf("%s\n", ONOFF(map->lower_memory[CMIS_MODULE_CONTROL_OFFSET] &

+			     CMIS_LOW_PWR_ALLOW_REQUEST_HW_MASK));

+	printf("\t%-41s : ", "LowPwrRequestSW");

+	printf("%s\n", ONOFF(map->lower_memory[CMIS_MODULE_CONTROL_OFFSET] &

+			     CMIS_LOW_PWR_REQUEST_SW_MASK));

+}

+

 static void cmis_parse_dom_power_type(const struct cmis_memory_map *map,

 				      struct sff_diags *sd)

 {

@@ -845,6 +859,7 @@ static void cmis_show_all_common(const struct cmis_memory_map *map)

 	cmis_show_rev_compliance(map);

 	cmis_show_mod_state(map);

 	cmis_show_mod_fault_cause(map);

+	cmis_show_mod_lvl_controls(map);

 	cmis_show_dom(map);

 }

diff --git a/cmis.h b/cmis.h

index 2c67ad5640ab..46797081f13c 100644

--- a/cmis.h

+++ b/cmis.h

@@ -36,6 +36,11 @@

 #define CMIS_CURR_TEMP_OFFSET			0x0E

 #define CMIS_CURR_VCC_OFFSET			0x10

+/* Module Global Controls (Page 0) */

+#define CMIS_MODULE_CONTROL_OFFSET		0x1A

+#define CMIS_LOW_PWR_ALLOW_REQUEST_HW_MASK	0x40

+#define CMIS_LOW_PWR_REQUEST_SW_MASK		0x10

+

 /* Module Fault Information (Page 0) */

 #define CMIS_MODULE_FAULT_OFFSET		0x29

 #define CMIS_MODULE_FAULT_NO_FAULT		0x00

-- 

2.35.1