diff options
| -rw-r--r-- | Documentation/ABI/testing/sysfs-driver-intel-xe-hwmon | 7 | ||||
| -rw-r--r-- | drivers/gpu/drm/xe/regs/xe_gt_regs.h | 2 | ||||
| -rw-r--r-- | drivers/gpu/drm/xe/regs/xe_mchbar_regs.h | 3 | ||||
| -rw-r--r-- | drivers/gpu/drm/xe/xe_hwmon.c | 105 |
4 files changed, 116 insertions, 1 deletions
diff --git a/Documentation/ABI/testing/sysfs-driver-intel-xe-hwmon b/Documentation/ABI/testing/sysfs-driver-intel-xe-hwmon index 7f9407c20864..1a7a6c23e141 100644 --- a/Documentation/ABI/testing/sysfs-driver-intel-xe-hwmon +++ b/Documentation/ABI/testing/sysfs-driver-intel-xe-hwmon @@ -52,3 +52,10 @@ Description: RO. Current Voltage in millivolt. Only supported for particular Intel xe graphics platforms. +What: /sys/devices/.../hwmon/hwmon<i>/energy1_input +Date: September 2023 +KernelVersion: 6.5 +Contact: intel-xe@lists.freedesktop.org +Description: RO. Energy input of device in microjoules. + + Only supported for particular Intel xe graphics platforms. diff --git a/drivers/gpu/drm/xe/regs/xe_gt_regs.h b/drivers/gpu/drm/xe/regs/xe_gt_regs.h index a9a91195c6d5..83519a424aab 100644 --- a/drivers/gpu/drm/xe/regs/xe_gt_regs.h +++ b/drivers/gpu/drm/xe/regs/xe_gt_regs.h @@ -414,8 +414,10 @@ #define XEHPC_BCS5_BCS6_INTR_MASK XE_REG(0x190118) #define XEHPC_BCS7_BCS8_INTR_MASK XE_REG(0x19011c) +#define PVC_GT0_PACKAGE_ENERGY_STATUS XE_REG(0x281004) #define PVC_GT0_PACKAGE_RAPL_LIMIT XE_REG(0x281008) #define PVC_GT0_PACKAGE_POWER_SKU_UNIT XE_REG(0x281068) +#define PVC_GT0_PLATFORM_ENERGY_STATUS XE_REG(0x28106c) #define PVC_GT0_PACKAGE_POWER_SKU XE_REG(0x281080) #endif diff --git a/drivers/gpu/drm/xe/regs/xe_mchbar_regs.h b/drivers/gpu/drm/xe/regs/xe_mchbar_regs.h index 27f1d42baf6d..d8ecbe1858d1 100644 --- a/drivers/gpu/drm/xe/regs/xe_mchbar_regs.h +++ b/drivers/gpu/drm/xe/regs/xe_mchbar_regs.h @@ -25,6 +25,9 @@ #define PCU_CR_PACKAGE_POWER_SKU_UNIT XE_REG(MCHBAR_MIRROR_BASE_SNB + 0x5938) #define PKG_PWR_UNIT REG_GENMASK(3, 0) +#define PKG_ENERGY_UNIT REG_GENMASK(12, 8) + +#define PCU_CR_PACKAGE_ENERGY_STATUS XE_REG(MCHBAR_MIRROR_BASE_SNB + 0x593c) #define PCU_CR_PACKAGE_RAPL_LIMIT XE_REG(MCHBAR_MIRROR_BASE_SNB + 0x59a0) #define PKG_PWR_LIM_1 REG_GENMASK(14, 0) diff --git a/drivers/gpu/drm/xe/xe_hwmon.c b/drivers/gpu/drm/xe/xe_hwmon.c index d89345b85e76..734fcca9f71f 100644 --- a/drivers/gpu/drm/xe/xe_hwmon.c +++ b/drivers/gpu/drm/xe/xe_hwmon.c @@ -22,6 +22,7 @@ enum xe_hwmon_reg { REG_PKG_POWER_SKU, REG_PKG_POWER_SKU_UNIT, REG_GT_PERF_STATUS, + REG_PKG_ENERGY_STATUS, }; enum xe_hwmon_reg_operation { @@ -36,12 +37,20 @@ enum xe_hwmon_reg_operation { #define SF_POWER 1000000 /* microwatts */ #define SF_CURR 1000 /* milliamperes */ #define SF_VOLTAGE 1000 /* millivolts */ +#define SF_ENERGY 1000000 /* microjoules */ + +struct xe_hwmon_energy_info { + u32 reg_val_prev; + long accum_energy; /* Accumulated energy for energy1_input */ +}; struct xe_hwmon { struct device *hwmon_dev; struct xe_gt *gt; struct mutex hwmon_lock; /* rmw operations*/ int scl_shift_power; + int scl_shift_energy; + struct xe_hwmon_energy_info ei; /* Energy info for energy1_input */ }; static u32 xe_hwmon_get_reg(struct xe_hwmon *hwmon, enum xe_hwmon_reg hwmon_reg) @@ -72,6 +81,12 @@ static u32 xe_hwmon_get_reg(struct xe_hwmon *hwmon, enum xe_hwmon_reg hwmon_reg) if (xe->info.platform == XE_DG2) reg = GT_PERF_STATUS; break; + case REG_PKG_ENERGY_STATUS: + if (xe->info.platform == XE_DG2) + reg = PCU_CR_PACKAGE_ENERGY_STATUS; + else if (xe->info.platform == XE_PVC) + reg = PVC_GT0_PLATFORM_ENERGY_STATUS; + break; default: drm_warn(&xe->drm, "Unknown xe hwmon reg id: %d\n", hwmon_reg); break; @@ -194,10 +209,59 @@ static int xe_hwmon_power_rated_max_read(struct xe_hwmon *hwmon, long *value) return 0; } +/* + * xe_hwmon_energy_get - Obtain energy value + * + * The underlying energy hardware register is 32-bits and is subject to + * overflow. How long before overflow? For example, with an example + * scaling bit shift of 14 bits (see register *PACKAGE_POWER_SKU_UNIT) and + * a power draw of 1000 watts, the 32-bit counter will overflow in + * approximately 4.36 minutes. + * + * Examples: + * 1 watt: (2^32 >> 14) / 1 W / (60 * 60 * 24) secs/day -> 3 days + * 1000 watts: (2^32 >> 14) / 1000 W / 60 secs/min -> 4.36 minutes + * + * The function significantly increases overflow duration (from 4.36 + * minutes) by accumulating the energy register into a 'long' as allowed by + * the hwmon API. Using x86_64 128 bit arithmetic (see mul_u64_u32_shr()), + * a 'long' of 63 bits, SF_ENERGY of 1e6 (~20 bits) and + * hwmon->scl_shift_energy of 14 bits we have 57 (63 - 20 + 14) bits before + * energy1_input overflows. This at 1000 W is an overflow duration of 278 years. + */ +static void +xe_hwmon_energy_get(struct xe_hwmon *hwmon, long *energy) +{ + struct xe_hwmon_energy_info *ei = &hwmon->ei; + u32 reg_val; + + xe_device_mem_access_get(gt_to_xe(hwmon->gt)); + + mutex_lock(&hwmon->hwmon_lock); + + xe_hwmon_process_reg(hwmon, REG_PKG_ENERGY_STATUS, REG_READ, + ®_val, 0, 0); + + if (reg_val >= ei->reg_val_prev) + ei->accum_energy += reg_val - ei->reg_val_prev; + else + ei->accum_energy += UINT_MAX - ei->reg_val_prev + reg_val; + + ei->reg_val_prev = reg_val; + + *energy = mul_u64_u32_shr(ei->accum_energy, SF_ENERGY, + hwmon->scl_shift_energy); + + mutex_unlock(&hwmon->hwmon_lock); + + xe_device_mem_access_put(gt_to_xe(hwmon->gt)); +} + static const struct hwmon_channel_info *hwmon_info[] = { HWMON_CHANNEL_INFO(power, HWMON_P_MAX | HWMON_P_RATED_MAX | HWMON_P_CRIT), HWMON_CHANNEL_INFO(curr, HWMON_C_CRIT), HWMON_CHANNEL_INFO(in, HWMON_I_INPUT), + HWMON_CHANNEL_INFO(energy, HWMON_E_INPUT), NULL }; @@ -372,6 +436,29 @@ xe_hwmon_in_read(struct xe_hwmon *hwmon, u32 attr, long *val) } static umode_t +xe_hwmon_energy_is_visible(struct xe_hwmon *hwmon, u32 attr) +{ + switch (attr) { + case hwmon_energy_input: + return xe_hwmon_get_reg(hwmon, REG_PKG_ENERGY_STATUS) ? 0444 : 0; + default: + return 0; + } +} + +static int +xe_hwmon_energy_read(struct xe_hwmon *hwmon, u32 attr, long *val) +{ + switch (attr) { + case hwmon_energy_input: + xe_hwmon_energy_get(hwmon, val); + return 0; + default: + return -EOPNOTSUPP; + } +} + +static umode_t xe_hwmon_is_visible(const void *drvdata, enum hwmon_sensor_types type, u32 attr, int channel) { @@ -390,6 +477,9 @@ xe_hwmon_is_visible(const void *drvdata, enum hwmon_sensor_types type, case hwmon_in: ret = xe_hwmon_in_is_visible(hwmon, attr); break; + case hwmon_energy: + ret = xe_hwmon_energy_is_visible(hwmon, attr); + break; default: ret = 0; break; @@ -419,6 +509,9 @@ xe_hwmon_read(struct device *dev, enum hwmon_sensor_types type, u32 attr, case hwmon_in: ret = xe_hwmon_in_read(hwmon, attr, val); break; + case hwmon_energy: + ret = xe_hwmon_energy_read(hwmon, attr, val); + break; default: ret = -EOPNOTSUPP; break; @@ -470,6 +563,7 @@ static void xe_hwmon_get_preregistration_info(struct xe_device *xe) { struct xe_hwmon *hwmon = xe->hwmon; + long energy; u32 val_sku_unit = 0; int ret; @@ -478,8 +572,17 @@ xe_hwmon_get_preregistration_info(struct xe_device *xe) * The contents of register PKG_POWER_SKU_UNIT do not change, * so read it once and store the shift values. */ - if (!ret) + if (!ret) { hwmon->scl_shift_power = REG_FIELD_GET(PKG_PWR_UNIT, val_sku_unit); + hwmon->scl_shift_energy = REG_FIELD_GET(PKG_ENERGY_UNIT, val_sku_unit); + } + + /* + * Initialize 'struct xe_hwmon_energy_info', i.e. set fields to the + * first value of the energy register read + */ + if (xe_hwmon_is_visible(hwmon, hwmon_energy, hwmon_energy_input, 0)) + xe_hwmon_energy_get(hwmon, &energy); } void xe_hwmon_register(struct xe_device *xe) |