| Message ID | 20221019060402.2807360-3-riana.tauro@intel.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Add hwmon support for dgfx selftests | expand |
> -----Original Message----- > From: Tauro, Riana <riana.tauro@intel.com> > Sent: Wednesday, October 19, 2022 11:34 AM > To: intel-gfx@lists.freedesktop.org > Cc: Tauro, Riana <riana.tauro@intel.com>; Gupta, Anshuman > <anshuman.gupta@intel.com>; Dixit, Ashutosh <ashutosh.dixit@intel.com>; > Nilawar, Badal <badal.nilawar@intel.com>; Tangudu, Tilak > <tilak.tangudu@intel.com> > Subject: [PATCH 2/3] drm/i915/hwmon: Add helper function to obtain > energy values > > Add an interface to obtain hwmon energy values. This is used by selftest to > verify power consumption > > Signed-off-by: Riana Tauro <riana.tauro@intel.com> > --- > drivers/gpu/drm/i915/i915_hwmon.c | 23 ++++++++++++++++++++--- > drivers/gpu/drm/i915/i915_hwmon.h | 1 + > 2 files changed, 21 insertions(+), 3 deletions(-) > > diff --git a/drivers/gpu/drm/i915/i915_hwmon.c > b/drivers/gpu/drm/i915/i915_hwmon.c > index 9e9781493025..1eb85cd96171 100644 > --- a/drivers/gpu/drm/i915/i915_hwmon.c > +++ b/drivers/gpu/drm/i915/i915_hwmon.c > @@ -138,7 +138,7 @@ hwm_field_scale_and_write(struct hwm_drvdata > *ddat, i915_reg_t rgadr, > * 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 > +static int > hwm_energy(struct hwm_drvdata *ddat, long *energy) { > struct intel_uncore *uncore = ddat->uncore; @@ -153,6 +153,9 @@ > hwm_energy(struct hwm_drvdata *ddat, long *energy) > else > rgaddr = hwmon->rg.energy_status_all; > > + if (!i915_mmio_reg_valid(rgaddr)) > + return -EOPNOTSUPP; We can check above in the exported API function then we don't need to change the function Prototype. > + > mutex_lock(&hwmon->hwmon_lock); > > with_intel_runtime_pm(uncore->rpm, wakeref) @@ -167,6 +170,21 > @@ hwm_energy(struct hwm_drvdata *ddat, long *energy) > *energy = mul_u64_u32_shr(ei->accum_energy, SF_ENERGY, > hwmon->scl_shift_energy); > mutex_unlock(&hwmon->hwmon_lock); > + > + return 0; > +} > + > +/* > + * i915_hwm_get_energy - obtains energy value > + * Returns: 0 on success or a negative error code */ int > +i915_hwm_get_energy(struct drm_i915_private *i915, long *energy) { Please keep i915_hwmon prefix. Br, Anshuman Gupta. > + struct i915_hwmon *hwmon = i915->hwmon; > + struct hwm_drvdata *ddat = &hwmon->ddat; > + > + return hwm_energy(ddat, energy); > } > > static ssize_t > @@ -441,8 +459,7 @@ hwm_energy_read(struct hwm_drvdata *ddat, u32 > attr, long *val) { > switch (attr) { > case hwmon_energy_input: > - hwm_energy(ddat, val); > - return 0; > + return hwm_energy(ddat, val); > default: > return -EOPNOTSUPP; > } > diff --git a/drivers/gpu/drm/i915/i915_hwmon.h > b/drivers/gpu/drm/i915/i915_hwmon.h > index 7ca9cf2c34c9..fa3b13568b37 100644 > --- a/drivers/gpu/drm/i915/i915_hwmon.h > +++ b/drivers/gpu/drm/i915/i915_hwmon.h > @@ -12,6 +12,7 @@ struct drm_i915_private; #if > IS_REACHABLE(CONFIG_HWMON) void i915_hwmon_register(struct > drm_i915_private *i915); void i915_hwmon_unregister(struct > drm_i915_private *i915); > +int i915_hwm_get_energy(struct drm_i915_private *i915, long *energy); > #else > static inline void i915_hwmon_register(struct drm_i915_private *i915) { }; > static inline void i915_hwmon_unregister(struct drm_i915_private *i915) { }; > -- > 2.25.1
diff --git a/drivers/gpu/drm/i915/i915_hwmon.c b/drivers/gpu/drm/i915/i915_hwmon.c index 9e9781493025..1eb85cd96171 100644 --- a/drivers/gpu/drm/i915/i915_hwmon.c +++ b/drivers/gpu/drm/i915/i915_hwmon.c @@ -138,7 +138,7 @@ hwm_field_scale_and_write(struct hwm_drvdata *ddat, i915_reg_t rgadr, * 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 +static int hwm_energy(struct hwm_drvdata *ddat, long *energy) { struct intel_uncore *uncore = ddat->uncore; @@ -153,6 +153,9 @@ hwm_energy(struct hwm_drvdata *ddat, long *energy) else rgaddr = hwmon->rg.energy_status_all; + if (!i915_mmio_reg_valid(rgaddr)) + return -EOPNOTSUPP; + mutex_lock(&hwmon->hwmon_lock); with_intel_runtime_pm(uncore->rpm, wakeref) @@ -167,6 +170,21 @@ hwm_energy(struct hwm_drvdata *ddat, long *energy) *energy = mul_u64_u32_shr(ei->accum_energy, SF_ENERGY, hwmon->scl_shift_energy); mutex_unlock(&hwmon->hwmon_lock); + + return 0; +} + +/* + * i915_hwm_get_energy - obtains energy value + * Returns: 0 on success or a negative error code + */ +int +i915_hwm_get_energy(struct drm_i915_private *i915, long *energy) +{ + struct i915_hwmon *hwmon = i915->hwmon; + struct hwm_drvdata *ddat = &hwmon->ddat; + + return hwm_energy(ddat, energy); } static ssize_t @@ -441,8 +459,7 @@ hwm_energy_read(struct hwm_drvdata *ddat, u32 attr, long *val) { switch (attr) { case hwmon_energy_input: - hwm_energy(ddat, val); - return 0; + return hwm_energy(ddat, val); default: return -EOPNOTSUPP; } diff --git a/drivers/gpu/drm/i915/i915_hwmon.h b/drivers/gpu/drm/i915/i915_hwmon.h index 7ca9cf2c34c9..fa3b13568b37 100644 --- a/drivers/gpu/drm/i915/i915_hwmon.h +++ b/drivers/gpu/drm/i915/i915_hwmon.h @@ -12,6 +12,7 @@ struct drm_i915_private; #if IS_REACHABLE(CONFIG_HWMON) void i915_hwmon_register(struct drm_i915_private *i915); void i915_hwmon_unregister(struct drm_i915_private *i915); +int i915_hwm_get_energy(struct drm_i915_private *i915, long *energy); #else static inline void i915_hwmon_register(struct drm_i915_private *i915) { }; static inline void i915_hwmon_unregister(struct drm_i915_private *i915) { };
Add an interface to obtain hwmon energy values. This is used by selftest to verify power consumption Signed-off-by: Riana Tauro <riana.tauro@intel.com> --- drivers/gpu/drm/i915/i915_hwmon.c | 23 ++++++++++++++++++++--- drivers/gpu/drm/i915/i915_hwmon.h | 1 + 2 files changed, 21 insertions(+), 3 deletions(-)