diff options
Diffstat (limited to 'drivers/gpu/drm/xe/xe_gt_throttle.c')
| -rw-r--r-- | drivers/gpu/drm/xe/xe_gt_throttle.c | 249 |
1 files changed, 249 insertions, 0 deletions
diff --git a/drivers/gpu/drm/xe/xe_gt_throttle.c b/drivers/gpu/drm/xe/xe_gt_throttle.c new file mode 100644 index 000000000000..25963e33a383 --- /dev/null +++ b/drivers/gpu/drm/xe/xe_gt_throttle.c @@ -0,0 +1,249 @@ +// SPDX-License-Identifier: MIT +/* + * Copyright © 2023 Intel Corporation + */ + +#include <drm/drm_managed.h> + +#include <regs/xe_gt_regs.h> +#include "xe_device.h" +#include "xe_gt.h" +#include "xe_gt_sysfs.h" +#include "xe_gt_throttle.h" +#include "xe_mmio.h" +#include "xe_pm.h" + +/** + * DOC: Xe GT Throttle + * + * Provides sysfs entries and other helpers for frequency throttle reasons in GT + * + * device/gt#/freq0/throttle/status - Overall status + * device/gt#/freq0/throttle/reason_pl1 - Frequency throttle due to PL1 + * device/gt#/freq0/throttle/reason_pl2 - Frequency throttle due to PL2 + * device/gt#/freq0/throttle/reason_pl4 - Frequency throttle due to PL4, Iccmax etc. + * device/gt#/freq0/throttle/reason_thermal - Frequency throttle due to thermal + * device/gt#/freq0/throttle/reason_prochot - Frequency throttle due to prochot + * device/gt#/freq0/throttle/reason_ratl - Frequency throttle due to RATL + * device/gt#/freq0/throttle/reason_vr_thermalert - Frequency throttle due to VR THERMALERT + * device/gt#/freq0/throttle/reason_vr_tdc - Frequency throttle due to VR TDC + */ + +static struct xe_gt * +dev_to_gt(struct device *dev) +{ + return kobj_to_gt(dev->kobj.parent); +} + +u32 xe_gt_throttle_get_limit_reasons(struct xe_gt *gt) +{ + u32 reg; + + xe_pm_runtime_get(gt_to_xe(gt)); + if (xe_gt_is_media_type(gt)) + reg = xe_mmio_read32(gt, MTL_MEDIA_PERF_LIMIT_REASONS); + else + reg = xe_mmio_read32(gt, GT0_PERF_LIMIT_REASONS); + xe_pm_runtime_put(gt_to_xe(gt)); + + return reg; +} + +static u32 read_status(struct xe_gt *gt) +{ + u32 status = xe_gt_throttle_get_limit_reasons(gt) & GT0_PERF_LIMIT_REASONS_MASK; + + return status; +} + +static u32 read_reason_pl1(struct xe_gt *gt) +{ + u32 pl1 = xe_gt_throttle_get_limit_reasons(gt) & POWER_LIMIT_1_MASK; + + return pl1; +} + +static u32 read_reason_pl2(struct xe_gt *gt) +{ + u32 pl2 = xe_gt_throttle_get_limit_reasons(gt) & POWER_LIMIT_2_MASK; + + return pl2; +} + +static u32 read_reason_pl4(struct xe_gt *gt) +{ + u32 pl4 = xe_gt_throttle_get_limit_reasons(gt) & POWER_LIMIT_4_MASK; + + return pl4; +} + +static u32 read_reason_thermal(struct xe_gt *gt) +{ + u32 thermal = xe_gt_throttle_get_limit_reasons(gt) & THERMAL_LIMIT_MASK; + + return thermal; +} + +static u32 read_reason_prochot(struct xe_gt *gt) +{ + u32 prochot = xe_gt_throttle_get_limit_reasons(gt) & PROCHOT_MASK; + + return prochot; +} + +static u32 read_reason_ratl(struct xe_gt *gt) +{ + u32 ratl = xe_gt_throttle_get_limit_reasons(gt) & RATL_MASK; + + return ratl; +} + +static u32 read_reason_vr_thermalert(struct xe_gt *gt) +{ + u32 thermalert = xe_gt_throttle_get_limit_reasons(gt) & VR_THERMALERT_MASK; + + return thermalert; +} + +static u32 read_reason_vr_tdc(struct xe_gt *gt) +{ + u32 tdc = xe_gt_throttle_get_limit_reasons(gt) & VR_TDC_MASK; + + return tdc; +} + +static ssize_t status_show(struct device *dev, + struct device_attribute *attr, + char *buff) +{ + struct xe_gt *gt = dev_to_gt(dev); + bool status = !!read_status(gt); + + return sysfs_emit(buff, "%u\n", status); +} +static DEVICE_ATTR_RO(status); + +static ssize_t reason_pl1_show(struct device *dev, + struct device_attribute *attr, + char *buff) +{ + struct xe_gt *gt = dev_to_gt(dev); + bool pl1 = !!read_reason_pl1(gt); + + return sysfs_emit(buff, "%u\n", pl1); +} +static DEVICE_ATTR_RO(reason_pl1); + +static ssize_t reason_pl2_show(struct device *dev, + struct device_attribute *attr, + char *buff) +{ + struct xe_gt *gt = dev_to_gt(dev); + bool pl2 = !!read_reason_pl2(gt); + + return sysfs_emit(buff, "%u\n", pl2); +} +static DEVICE_ATTR_RO(reason_pl2); + +static ssize_t reason_pl4_show(struct device *dev, + struct device_attribute *attr, + char *buff) +{ + struct xe_gt *gt = dev_to_gt(dev); + bool pl4 = !!read_reason_pl4(gt); + + return sysfs_emit(buff, "%u\n", pl4); +} +static DEVICE_ATTR_RO(reason_pl4); + +static ssize_t reason_thermal_show(struct device *dev, + struct device_attribute *attr, + char *buff) +{ + struct xe_gt *gt = dev_to_gt(dev); + bool thermal = !!read_reason_thermal(gt); + + return sysfs_emit(buff, "%u\n", thermal); +} +static DEVICE_ATTR_RO(reason_thermal); + +static ssize_t reason_prochot_show(struct device *dev, + struct device_attribute *attr, + char *buff) +{ + struct xe_gt *gt = dev_to_gt(dev); + bool prochot = !!read_reason_prochot(gt); + + return sysfs_emit(buff, "%u\n", prochot); +} +static DEVICE_ATTR_RO(reason_prochot); + +static ssize_t reason_ratl_show(struct device *dev, + struct device_attribute *attr, + char *buff) +{ + struct xe_gt *gt = dev_to_gt(dev); + bool ratl = !!read_reason_ratl(gt); + + return sysfs_emit(buff, "%u\n", ratl); +} +static DEVICE_ATTR_RO(reason_ratl); + +static ssize_t reason_vr_thermalert_show(struct device *dev, + struct device_attribute *attr, + char *buff) +{ + struct xe_gt *gt = dev_to_gt(dev); + bool thermalert = !!read_reason_vr_thermalert(gt); + + return sysfs_emit(buff, "%u\n", thermalert); +} +static DEVICE_ATTR_RO(reason_vr_thermalert); + +static ssize_t reason_vr_tdc_show(struct device *dev, + struct device_attribute *attr, + char *buff) +{ + struct xe_gt *gt = dev_to_gt(dev); + bool tdc = !!read_reason_vr_tdc(gt); + + return sysfs_emit(buff, "%u\n", tdc); +} +static DEVICE_ATTR_RO(reason_vr_tdc); + +static struct attribute *throttle_attrs[] = { + &dev_attr_status.attr, + &dev_attr_reason_pl1.attr, + &dev_attr_reason_pl2.attr, + &dev_attr_reason_pl4.attr, + &dev_attr_reason_thermal.attr, + &dev_attr_reason_prochot.attr, + &dev_attr_reason_ratl.attr, + &dev_attr_reason_vr_thermalert.attr, + &dev_attr_reason_vr_tdc.attr, + NULL +}; + +static const struct attribute_group throttle_group_attrs = { + .name = "throttle", + .attrs = throttle_attrs, +}; + +static void gt_throttle_sysfs_fini(void *arg) +{ + struct xe_gt *gt = arg; + + sysfs_remove_group(gt->freq, &throttle_group_attrs); +} + +int xe_gt_throttle_init(struct xe_gt *gt) +{ + struct xe_device *xe = gt_to_xe(gt); + int err; + + err = sysfs_create_group(gt->freq, &throttle_group_attrs); + if (err) + return err; + + return devm_add_action_or_reset(xe->drm.dev, gt_throttle_sysfs_fini, gt); +} |