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net/mlx5: Expose NIC temperature via hardware monitoring kernel API

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Expose NIC temperature by implementing hwmon kernel API, which turns
current thermal zone kernel API to redundant.

For each one of the supported and exposed thermal diode sensors, expose
the following attributes:
1) Input temperature.
2) Highest temperature.
3) Temperature label:
   Depends on the firmware capability, if firmware doesn't support
   sensors naming, the fallback naming convention would be: "sensorX",
   where X is the HW spec (MTMP register) sensor index.
4) Temperature critical max value:
   refers to the high threshold of Warning Event. Will be exposed as
   `tempY_crit` hwmon attribute (RO attribute). For example for
   ConnectX5 HCA's this temperature value will be 105 Celsius, 10
   degrees lower than the HW shutdown temperature).
5) Temperature reset history: resets highest temperature.

For example, for dualport ConnectX5 NIC with a single IC thermal diode
sensor will have 2 hwmon directories (one for each PCI function)
under "/sys/class/hwmon/hwmon[X,Y]".

Listing one of the directories above (hwmonX/Y) generates the
corresponding output below:

$ grep -H -d skip . /sys/class/hwmon/hwmon0/*

Output
=======================================================================
/sys/class/hwmon/hwmon0/name:mlx5
/sys/class/hwmon/hwmon0/temp1_crit:105000
/sys/class/hwmon/hwmon0/temp1_highest:48000
/sys/class/hwmon/hwmon0/temp1_input:46000
/sys/class/hwmon/hwmon0/temp1_label:asic
grep: /sys/class/hwmon/hwmon0/temp1_reset_history: Permission denied

In addition, displaying the sensors data via lm_sensors generates the
corresponding output below:

$ sensors

Output
=======================================================================
mlx5-pci-0800
Adapter: PCI adapter
asic:         +46.0°C  (crit = +105.0°C, highest = +48.0°C)

mlx5-pci-0801
Adapter: PCI adapter
asic:         +46.0°C  (crit = +105.0°C, highest = +48.0°C)

CC: Jean Delvare <jdelvare@suse.com>
Signed-off-by: Adham Faris <afaris@nvidia.com>
Reviewed-by: Tariq Toukan <tariqt@nvidia.com>
Reviewed-by: Gal Pressman <gal@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://lore.kernel.org/r/20230807180507.22984-3-saeed@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Adham Faris
2023-08-07 11:05:07 -07:00
committed by Jakub Kicinski
parent 383a4de3b4
commit 1f507e80c7
9 changed files with 463 additions and 141 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
include/linux/mlx5/driver.h
View File

@@ -134,6 +134,7 @@ enum {
MLX5_REG_PCAM = 0x507f,
MLX5_REG_NODE_DESC = 0x6001,
MLX5_REG_HOST_ENDIANNESS = 0x7004,
MLX5_REG_MTCAP = 0x9009,
MLX5_REG_MTMP = 0x900A,
MLX5_REG_MCIA = 0x9014,
MLX5_REG_MFRL = 0x9028,
@@ -805,7 +806,7 @@ struct mlx5_core_dev {
struct mlx5_rsc_dump *rsc_dump;
u32 vsc_addr;
struct mlx5_hv_vhca *hv_vhca;
struct mlx5_thermal *thermal;
struct mlx5_hwmon *hwmon;
u64 num_block_tc;
u64 num_block_ipsec;
};

14
include/linux/mlx5/mlx5_ifc.h
View File

@@ -10196,7 +10196,9 @@ struct mlx5_ifc_mcam_access_reg_bits {
u8 mrtc[0x1];
u8 regs_44_to_32[0xd];
u8 regs_31_to_0[0x20];
u8 regs_31_to_10[0x16];
u8 mtmp[0x1];
u8 regs_8_to_0[0x9];
};
struct mlx5_ifc_mcam_access_reg_bits1 {
@@ -10949,6 +10951,15 @@ struct mlx5_ifc_mrtc_reg_bits {
u8 time_l[0x20];
};
struct mlx5_ifc_mtcap_reg_bits {
u8 reserved_at_0[0x19];
u8 sensor_count[0x7];
u8 reserved_at_20[0x20];
u8 sensor_map[0x40];
};
struct mlx5_ifc_mtmp_reg_bits {
u8 reserved_at_0[0x14];
u8 sensor_index[0xc];
@@ -11036,6 +11047,7 @@ union mlx5_ifc_ports_control_registers_document_bits {
struct mlx5_ifc_mfrl_reg_bits mfrl_reg;
struct mlx5_ifc_mtutc_reg_bits mtutc_reg;
struct mlx5_ifc_mrtc_reg_bits mrtc_reg;
struct mlx5_ifc_mtcap_reg_bits mtcap_reg;
struct mlx5_ifc_mtmp_reg_bits mtmp_reg;
u8 reserved_at_0[0x60e0];
};