Re: [Intel-gfx] [PATCH 6/7] drm/i915/hwmon: Expose power1_max_interval
On Mon, 03 Oct 2022 14:32:36 -0700, Andi Shyti wrote:
>
Hi Andi,
> > diff --git a/Documentation/ABI/testing/sysfs-driver-intel-i915-hwmon
> > b/Documentation/ABI/testing/sysfs-driver-intel-i915-hwmon
> > index f9d6d3b08bba..19b9fe3ef237 100644
> > --- a/Documentation/ABI/testing/sysfs-driver-intel-i915-hwmon
> > +++ b/Documentation/ABI/testing/sysfs-driver-intel-i915-hwmon
> > @@ -26,6 +26,15 @@ Description: RO. Card default power limit (default
> > TDP setting).
> >
> > Only supported for particular Intel i915 graphics platforms.
> >
> > +What: /sys/devices/.../hwmon/hwmon/power1_max_interval
> > +Date: February 2023
> > +KernelVersion: 6.2
> > +Contact: dri-devel@lists.freedesktop.org
>
> same question here.
>
> > +Description: RW. Sustained power limit interval (Tau in PL1/Tau) in
> > + milliseconds over which sustained power is averaged.
> > +
> > + Only supported for particular Intel i915 graphics platforms.
> > +
> > What: /sys/devices/.../hwmon/hwmon/power1_crit
> > Date: February 2023
> > KernelVersion: 6.2
> > diff --git a/drivers/gpu/drm/i915/i915_hwmon.c
> > b/drivers/gpu/drm/i915/i915_hwmon.c
> > index 2394fa789793..641143956c45 100644
> > --- a/drivers/gpu/drm/i915/i915_hwmon.c
> > +++ b/drivers/gpu/drm/i915/i915_hwmon.c
> > @@ -20,11 +20,13 @@
> > * - power - microwatts
> > * - curr - milliamperes
> > * - energy - microjoules
> > + * - time - milliseconds
> > */
> > #define SF_VOLTAGE 1000
> > #define SF_POWER 100
> > #define SF_CURR1000
> > #define SF_ENERGY 100
> > +#define SF_TIME1000
> >
> > struct hwm_reg {
> > i915_reg_t gt_perf_status;
> > @@ -53,6 +55,7 @@ struct i915_hwmon {
> > struct hwm_reg rg;
> > int scl_shift_power;
> > int scl_shift_energy;
> > + int scl_shift_time;
> > };
> >
> > static void
> > @@ -161,6 +164,115 @@ hwm_energy(struct hwm_drvdata *ddat, long *energy)
> > return 0;
> > }
> >
> > +static ssize_t
> > +hwm_power1_max_interval_show(struct device *dev, struct device_attribute
> > *attr,
> > +char *buf)
> > +{
> > + struct hwm_drvdata *ddat = dev_get_drvdata(dev);
> > + struct i915_hwmon *hwmon = ddat->hwmon;
> > + intel_wakeref_t wakeref;
> > + u32 r, x, y, x_w = 2; /* 2 bits */
> > + u64 tau4, out;
> > +
> > + with_intel_runtime_pm(ddat->uncore->rpm, wakeref)
> > + r = intel_uncore_read(ddat->uncore, hwmon->rg.pkg_rapl_limit);
> > +
> > + x = REG_FIELD_GET(PKG_PWR_LIM_1_TIME_X, r);
> > + y = REG_FIELD_GET(PKG_PWR_LIM_1_TIME_Y, r);
> > + /*
> > +* tau = 1.x * power(2,y), x = bits(23:22), y = bits(21:17)
> > +* = (4 | x) << (y - 2)
> > +* where (y - 2) ensures a 1.x fixed point representation of 1.x
> > +* However because y can be < 2, we compute
> > +* tau4 = (4 | x) << y
> > +* but add 2 when doing the final right shift to account for units
> > +*/
> > + tau4 = ((1 << x_w) | x) << y;
> > + /* val in hwmon interface units (millisec) */
> > + out = mul_u64_u32_shr(tau4, SF_TIME, hwmon->scl_shift_time + x_w);
> > +
> > + return sysfs_emit(buf, "%llu\n", out);
> > +}
> > +
> > +static ssize_t
> > +hwm_power1_max_interval_store(struct device *dev,
> > + struct device_attribute *attr,
> > + const char *buf, size_t count)
> > +{
> > + struct hwm_drvdata *ddat = dev_get_drvdata(dev);
> > + struct i915_hwmon *hwmon = ddat->hwmon;
> > + long val, max_win, ret;
>
> you have some type mismatch here:
>
> - val should be unsigned long
> - max_win should be u64
> - ret should be int
Thanks, fixed in v9.
>
> > + u32 x, y, rxy, x_w = 2; /* 2 bits */
> > + u64 tau4, r;
> > +
> > +#define PKG_MAX_WIN_DEFAULT 0x12ull
>
> could you please add a comment here?
Done.
> > +
> > + ret = kstrtoul(buf, 0, &val);
> > + if (ret)
> > + return ret;
> > +
> > + /*
> > +* val must be < max in hwmon interface units. The steps below are
> > +* explained in i915_power1_max_interval_show()
> > +*/
> > + r = FIELD_PREP(PKG_MAX_WIN, PKG_MAX_WIN_DEFAULT);
> > +
> > + x = REG_FIELD_GET(PKG_MAX_WIN_X, r);
> > + y = REG_FIELD_GET(PKG_MAX_WIN_Y, r);
> > + tau4 = ((1 << x_w) | x) << y;
> > + max_win = mul_u64_u32_shr(tau4, SF_TIME, hwmon->scl_shift_time + x_w);
> > +
> > + if (val > max_win)
> > + return -EINVAL;
> > +
> > + /* val in hw units */
> > + val = DIV_ROUND_CLOSEST_ULL((u64)val << hwmon->scl_shift_time, SF_TIME);
> > + /* Convert to 1.x * power(2,y) */
> > + if (!val)
> > + return -EINVAL;
> > + y = ilog2(val);
> > + /* x = (val - (1 << y)) >> (y - 2); */
>
> some leftover
No, it's a comment describing what's happening in the line below. I've left
it as is for now. Can remove it if you think it's unnecessary.
>
> > + x = (val - (1ul << y)) << x_w >> y;
> > +
> > + rxy = REG_FI
[PATCH 6/7] drm/i915/hwmon: Expose power1_max_interval
Expose power1_max_interval, that is the tau corresponding to PL1, as a
custom hwmon attribute. Some bit manipulation is needed because of the
format of PKG_PWR_LIM_1_TIME in
GT0_PACKAGE_RAPL_LIMIT register (1.x * power(2,y)).
v2: Update date and kernel version in Documentation (Badal)
v3: Cleaned up hwm_power1_max_interval_store() (Badal)
v4:
- Fixed review comments (Anshuman)
- In hwm_power1_max_interval_store() get PKG_MAX_WIN from
pkg_power_sku when it is valid (Ashutosh)
- KernelVersion: 6.2, Date: February 2023 in doc (Tvrtko)
v5: On some of the DGFX setups it is seen that although pkg_power_sku
is valid the field PKG_WIN_MAX is not populated. So it is
decided to stick to default value of PKG_WIN_MAX (Ashutosh)
v6: Change contact to intel-gfx (Rodrigo)
Fixed variable types in hwm_power1_max_interval_store (Andi)
Documented PKG_MAX_WIN_DEFAULT (Andi)
Removed else in hwm_attributes_visible (Andi)
Signed-off-by: Ashutosh Dixit
Signed-off-by: Badal Nilawar
Acked-by: Guenter Roeck
Reviewed-by: Anshuman Gupta
---
.../ABI/testing/sysfs-driver-intel-i915-hwmon | 9 ++
drivers/gpu/drm/i915/i915_hwmon.c | 119 +-
drivers/gpu/drm/i915/intel_mchbar_regs.h | 7 ++
3 files changed, 134 insertions(+), 1 deletion(-)
diff --git a/Documentation/ABI/testing/sysfs-driver-intel-i915-hwmon
b/Documentation/ABI/testing/sysfs-driver-intel-i915-hwmon
index a7a6512fcc8ca..9dc5ff14107bb 100644
--- a/Documentation/ABI/testing/sysfs-driver-intel-i915-hwmon
+++ b/Documentation/ABI/testing/sysfs-driver-intel-i915-hwmon
@@ -26,6 +26,15 @@ Description: RO. Card default power limit (default TDP
setting).
Only supported for particular Intel i915 graphics platforms.
+What: /sys/devices/.../hwmon/hwmon/power1_max_interval
+Date: February 2023
+KernelVersion: 6.2
+Contact: intel-...@lists.freedesktop.org
+Description: RW. Sustained power limit interval (Tau in PL1/Tau) in
+ milliseconds over which sustained power is averaged.
+
+ Only supported for particular Intel i915 graphics platforms.
+
What: /sys/devices/.../hwmon/hwmon/power1_crit
Date: February 2023
KernelVersion: 6.2
diff --git a/drivers/gpu/drm/i915/i915_hwmon.c
b/drivers/gpu/drm/i915/i915_hwmon.c
index 2b24a7a711400..58f80380e5427 100644
--- a/drivers/gpu/drm/i915/i915_hwmon.c
+++ b/drivers/gpu/drm/i915/i915_hwmon.c
@@ -20,11 +20,13 @@
* - power - microwatts
* - curr - milliamperes
* - energy - microjoules
+ * - time - milliseconds
*/
#define SF_VOLTAGE 1000
#define SF_POWER 100
#define SF_CURR1000
#define SF_ENERGY 100
+#define SF_TIME1000
struct hwm_reg {
i915_reg_t gt_perf_status;
@@ -53,6 +55,7 @@ struct i915_hwmon {
struct hwm_reg rg;
int scl_shift_power;
int scl_shift_energy;
+ int scl_shift_time;
};
static void
@@ -159,6 +162,119 @@ hwm_energy(struct hwm_drvdata *ddat, long *energy)
mutex_unlock(&hwmon->hwmon_lock);
}
+static ssize_t
+hwm_power1_max_interval_show(struct device *dev, struct device_attribute *attr,
+char *buf)
+{
+ struct hwm_drvdata *ddat = dev_get_drvdata(dev);
+ struct i915_hwmon *hwmon = ddat->hwmon;
+ intel_wakeref_t wakeref;
+ u32 r, x, y, x_w = 2; /* 2 bits */
+ u64 tau4, out;
+
+ with_intel_runtime_pm(ddat->uncore->rpm, wakeref)
+ r = intel_uncore_read(ddat->uncore, hwmon->rg.pkg_rapl_limit);
+
+ x = REG_FIELD_GET(PKG_PWR_LIM_1_TIME_X, r);
+ y = REG_FIELD_GET(PKG_PWR_LIM_1_TIME_Y, r);
+ /*
+* tau = 1.x * power(2,y), x = bits(23:22), y = bits(21:17)
+* = (4 | x) << (y - 2)
+* where (y - 2) ensures a 1.x fixed point representation of 1.x
+* However because y can be < 2, we compute
+* tau4 = (4 | x) << y
+* but add 2 when doing the final right shift to account for units
+*/
+ tau4 = ((1 << x_w) | x) << y;
+ /* val in hwmon interface units (millisec) */
+ out = mul_u64_u32_shr(tau4, SF_TIME, hwmon->scl_shift_time + x_w);
+
+ return sysfs_emit(buf, "%llu\n", out);
+}
+
+static ssize_t
+hwm_power1_max_interval_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct hwm_drvdata *ddat = dev_get_drvdata(dev);
+ struct i915_hwmon *hwmon = ddat->hwmon;
+ u32 x, y, rxy, x_w = 2; /* 2 bits */
+ u64 tau4, r, max_win;
+ unsigned long val;
+ int ret;
+
+ ret = kstrtoul(buf, 0, &val);
+ if (ret)
+ return ret;
+
+ /*
+* Max HW supported tau in '1.x * power(2,y)' format, x = 0, y = 0x12
+* The hwmon->scl_shift_time default of 0xa results in a max tau of 256
seconds
+*/
+#define PKG_MAX_WIN_DEFAULT 0
Re: [Intel-gfx] [PATCH 6/7] drm/i915/hwmon: Expose power1_max_interval
Hi Badal,
> diff --git a/Documentation/ABI/testing/sysfs-driver-intel-i915-hwmon
> b/Documentation/ABI/testing/sysfs-driver-intel-i915-hwmon
> index f9d6d3b08bba..19b9fe3ef237 100644
> --- a/Documentation/ABI/testing/sysfs-driver-intel-i915-hwmon
> +++ b/Documentation/ABI/testing/sysfs-driver-intel-i915-hwmon
> @@ -26,6 +26,15 @@ Description: RO. Card default power limit (default
> TDP setting).
>
> Only supported for particular Intel i915 graphics platforms.
>
> +What:/sys/devices/.../hwmon/hwmon/power1_max_interval
> +Date:February 2023
> +KernelVersion: 6.2
> +Contact: dri-devel@lists.freedesktop.org
same question here.
> +Description: RW. Sustained power limit interval (Tau in PL1/Tau) in
> + milliseconds over which sustained power is averaged.
> +
> + Only supported for particular Intel i915 graphics platforms.
> +
> What:/sys/devices/.../hwmon/hwmon/power1_crit
> Date:February 2023
> KernelVersion: 6.2
> diff --git a/drivers/gpu/drm/i915/i915_hwmon.c
> b/drivers/gpu/drm/i915/i915_hwmon.c
> index 2394fa789793..641143956c45 100644
> --- a/drivers/gpu/drm/i915/i915_hwmon.c
> +++ b/drivers/gpu/drm/i915/i915_hwmon.c
> @@ -20,11 +20,13 @@
> * - power - microwatts
> * - curr - milliamperes
> * - energy - microjoules
> + * - time - milliseconds
> */
> #define SF_VOLTAGE 1000
> #define SF_POWER 100
> #define SF_CURR 1000
> #define SF_ENERGY100
> +#define SF_TIME 1000
>
> struct hwm_reg {
> i915_reg_t gt_perf_status;
> @@ -53,6 +55,7 @@ struct i915_hwmon {
> struct hwm_reg rg;
> int scl_shift_power;
> int scl_shift_energy;
> + int scl_shift_time;
> };
>
> static void
> @@ -161,6 +164,115 @@ hwm_energy(struct hwm_drvdata *ddat, long *energy)
> return 0;
> }
>
> +static ssize_t
> +hwm_power1_max_interval_show(struct device *dev, struct device_attribute
> *attr,
> + char *buf)
> +{
> + struct hwm_drvdata *ddat = dev_get_drvdata(dev);
> + struct i915_hwmon *hwmon = ddat->hwmon;
> + intel_wakeref_t wakeref;
> + u32 r, x, y, x_w = 2; /* 2 bits */
> + u64 tau4, out;
> +
> + with_intel_runtime_pm(ddat->uncore->rpm, wakeref)
> + r = intel_uncore_read(ddat->uncore, hwmon->rg.pkg_rapl_limit);
> +
> + x = REG_FIELD_GET(PKG_PWR_LIM_1_TIME_X, r);
> + y = REG_FIELD_GET(PKG_PWR_LIM_1_TIME_Y, r);
> + /*
> + * tau = 1.x * power(2,y), x = bits(23:22), y = bits(21:17)
> + * = (4 | x) << (y - 2)
> + * where (y - 2) ensures a 1.x fixed point representation of 1.x
> + * However because y can be < 2, we compute
> + * tau4 = (4 | x) << y
> + * but add 2 when doing the final right shift to account for units
> + */
> + tau4 = ((1 << x_w) | x) << y;
> + /* val in hwmon interface units (millisec) */
> + out = mul_u64_u32_shr(tau4, SF_TIME, hwmon->scl_shift_time + x_w);
> +
> + return sysfs_emit(buf, "%llu\n", out);
> +}
> +
> +static ssize_t
> +hwm_power1_max_interval_store(struct device *dev,
> + struct device_attribute *attr,
> + const char *buf, size_t count)
> +{
> + struct hwm_drvdata *ddat = dev_get_drvdata(dev);
> + struct i915_hwmon *hwmon = ddat->hwmon;
> + long val, max_win, ret;
you have some type mismatch here:
- val should be unsigned long
- max_win should be u64
- ret should be int
> + u32 x, y, rxy, x_w = 2; /* 2 bits */
> + u64 tau4, r;
> +
> +#define PKG_MAX_WIN_DEFAULT 0x12ull
could you please add a comment here?
> +
> + ret = kstrtoul(buf, 0, &val);
> + if (ret)
> + return ret;
> +
> + /*
> + * val must be < max in hwmon interface units. The steps below are
> + * explained in i915_power1_max_interval_show()
> + */
> + r = FIELD_PREP(PKG_MAX_WIN, PKG_MAX_WIN_DEFAULT);
> +
> + x = REG_FIELD_GET(PKG_MAX_WIN_X, r);
> + y = REG_FIELD_GET(PKG_MAX_WIN_Y, r);
> + tau4 = ((1 << x_w) | x) << y;
> + max_win = mul_u64_u32_shr(tau4, SF_TIME, hwmon->scl_shift_time + x_w);
> +
> + if (val > max_win)
> + return -EINVAL;
> +
> + /* val in hw units */
> + val = DIV_ROUND_CLOSEST_ULL((u64)val << hwmon->scl_shift_time, SF_TIME);
> + /* Convert to 1.x * power(2,y) */
> + if (!val)
> + return -EINVAL;
> + y = ilog2(val);
> + /* x = (val - (1 << y)) >> (y - 2); */
some leftover
> + x = (val - (1ul << y)) << x_w >> y;
> +
> + rxy = REG_FIELD_PREP(PKG_PWR_LIM_1_TIME_X, x) |
> REG_FIELD_PREP(PKG_PWR_LIM_1_TIME_Y, y);
> +
> + hwm_locked_with_pm_intel_uncore_rmw(ddat, hwmon->rg.pkg_rapl_limit,
> + PKG_PWR_LIM_1_TIME, rxy);
> + return count;
> +}
> +
> +static SENSOR_DEVICE_ATTR(power1_max_interval, 0664,
> + hwm
Re: [PATCH 6/7] drm/i915/hwmon: Expose power1_max_interval
On 9/27/2022 11:20 AM, Badal Nilawar wrote:
From: Ashutosh Dixit
Expose power1_max_interval, that is the tau corresponding to PL1, as a
custom hwmon attribute. Some bit manipulation is needed because of the
format of PKG_PWR_LIM_1_TIME in
GT0_PACKAGE_RAPL_LIMIT register (1.x * power(2,y)).
v2: Update date and kernel version in Documentation (Badal)
v3: Cleaned up hwm_power1_max_interval_store() (Badal)
v4:
- Fixed review comments (Anshuman)
- In hwm_power1_max_interval_store() get PKG_MAX_WIN from
pkg_power_sku when it is valid (Ashutosh)
- KernelVersion: 6.2, Date: February 2023 in doc (Tvrtko)
v5: On some of the DGFX setups it is seen that although pkg_power_sku
is valid the field PKG_WIN_MAX is not populated. So it is
decided to stick to default value of PKG_WIN_MAX (Ashutosh)
Signed-off-by: Ashutosh Dixit
Signed-off-by: Badal Nilawar
Acked-by: Guenter Roeck
LGTM,
Reviewed-by: Anshuman Gupta
---
.../ABI/testing/sysfs-driver-intel-i915-hwmon | 9 ++
drivers/gpu/drm/i915/i915_hwmon.c | 115 +-
drivers/gpu/drm/i915/intel_mchbar_regs.h | 7 ++
3 files changed, 130 insertions(+), 1 deletion(-)
diff --git a/Documentation/ABI/testing/sysfs-driver-intel-i915-hwmon
b/Documentation/ABI/testing/sysfs-driver-intel-i915-hwmon
index f9d6d3b08bba..19b9fe3ef237 100644
--- a/Documentation/ABI/testing/sysfs-driver-intel-i915-hwmon
+++ b/Documentation/ABI/testing/sysfs-driver-intel-i915-hwmon
@@ -26,6 +26,15 @@ Description: RO. Card default power limit (default TDP
setting).
Only supported for particular Intel i915 graphics platforms.
+What: /sys/devices/.../hwmon/hwmon/power1_max_interval
+Date: February 2023
+KernelVersion: 6.2
+Contact: dri-devel@lists.freedesktop.org
+Description: RW. Sustained power limit interval (Tau in PL1/Tau) in
+ milliseconds over which sustained power is averaged.
+
+ Only supported for particular Intel i915 graphics platforms.
+
What: /sys/devices/.../hwmon/hwmon/power1_crit
Date: February 2023
KernelVersion:6.2
diff --git a/drivers/gpu/drm/i915/i915_hwmon.c
b/drivers/gpu/drm/i915/i915_hwmon.c
index 2394fa789793..641143956c45 100644
--- a/drivers/gpu/drm/i915/i915_hwmon.c
+++ b/drivers/gpu/drm/i915/i915_hwmon.c
@@ -20,11 +20,13 @@
* - power - microwatts
* - curr - milliamperes
* - energy - microjoules
+ * - time - milliseconds
*/
#define SF_VOLTAGE1000
#define SF_POWER 100
#define SF_CURR 1000
#define SF_ENERGY 100
+#define SF_TIME1000
struct hwm_reg {
i915_reg_t gt_perf_status;
@@ -53,6 +55,7 @@ struct i915_hwmon {
struct hwm_reg rg;
int scl_shift_power;
int scl_shift_energy;
+ int scl_shift_time;
};
static void
@@ -161,6 +164,115 @@ hwm_energy(struct hwm_drvdata *ddat, long *energy)
return 0;
}
+static ssize_t
+hwm_power1_max_interval_show(struct device *dev, struct device_attribute *attr,
+char *buf)
+{
+ struct hwm_drvdata *ddat = dev_get_drvdata(dev);
+ struct i915_hwmon *hwmon = ddat->hwmon;
+ intel_wakeref_t wakeref;
+ u32 r, x, y, x_w = 2; /* 2 bits */
+ u64 tau4, out;
+
+ with_intel_runtime_pm(ddat->uncore->rpm, wakeref)
+ r = intel_uncore_read(ddat->uncore, hwmon->rg.pkg_rapl_limit);
+
+ x = REG_FIELD_GET(PKG_PWR_LIM_1_TIME_X, r);
+ y = REG_FIELD_GET(PKG_PWR_LIM_1_TIME_Y, r);
+ /*
+* tau = 1.x * power(2,y), x = bits(23:22), y = bits(21:17)
+* = (4 | x) << (y - 2)
+* where (y - 2) ensures a 1.x fixed point representation of 1.x
+* However because y can be < 2, we compute
+* tau4 = (4 | x) << y
+* but add 2 when doing the final right shift to account for units
+*/
+ tau4 = ((1 << x_w) | x) << y;
+ /* val in hwmon interface units (millisec) */
+ out = mul_u64_u32_shr(tau4, SF_TIME, hwmon->scl_shift_time + x_w);
+
+ return sysfs_emit(buf, "%llu\n", out);
+}
+
+static ssize_t
+hwm_power1_max_interval_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct hwm_drvdata *ddat = dev_get_drvdata(dev);
+ struct i915_hwmon *hwmon = ddat->hwmon;
+ long val, max_win, ret;
+ u32 x, y, rxy, x_w = 2; /* 2 bits */
+ u64 tau4, r;
+
+#define PKG_MAX_WIN_DEFAULT 0x12ull
+
+ ret = kstrtoul(buf, 0, &val);
+ if (ret)
+ return ret;
+
+ /*
+* val must be < max in hwmon interface units. The steps below are
+* explained in i915_power1_max_interval_show()
+*/
+ r = FIELD_PREP(PKG_MAX_WIN, PKG_MAX_WIN_DEFAULT);
+
+ x = REG_FIELD_GET(PKG_MAX_WIN_X, r);
+ y = REG_FIELD_GET(PKG_MAX_WIN_Y, r);
+ tau4 = ((1 << x_w) | x
Re: [PATCH 6/7] drm/i915/hwmon: Expose power1_max_interval
On 9/26/2022 11:22 PM, Badal Nilawar wrote:
From: Ashutosh Dixit
Expose power1_max_interval, that is the tau corresponding to PL1, as a
custom hwmon attribute. Some bit manipulation is needed because of the
format of PKG_PWR_LIM_1_TIME in
GT0_PACKAGE_RAPL_LIMIT register (1.x * power(2,y)).
v2: Update date and kernel version in Documentation (Badal)
v3: Cleaned up hwm_power1_max_interval_store() (Badal)
v4:
- Fixed review comments (Anshuman)
- In hwm_power1_max_interval_store() get PKG_MAX_WIN from
pkg_power_sku when it is valid (Ashutosh)
- KernelVersion: 6.2, Date: February 2023 in doc (Tvrtko)
v5: On some of the DGFX setups it is seen that although pkg_power_sku
is valid the field PKG_WIN_MAX is not populated. So it is
decided to stick to default value of PKG_WIN_MAX (Ashutosh)
Signed-off-by: Ashutosh Dixit
Signed-off-by: Badal Nilawar
Acked-by: Guenter Roeck
LGTM
Reviewed-by: Anshuman Gupta
---
.../ABI/testing/sysfs-driver-intel-i915-hwmon | 9 ++
drivers/gpu/drm/i915/i915_hwmon.c | 115 +-
drivers/gpu/drm/i915/intel_mchbar_regs.h | 7 ++
3 files changed, 130 insertions(+), 1 deletion(-)
diff --git a/Documentation/ABI/testing/sysfs-driver-intel-i915-hwmon
b/Documentation/ABI/testing/sysfs-driver-intel-i915-hwmon
index f9d6d3b08bba..19b9fe3ef237 100644
--- a/Documentation/ABI/testing/sysfs-driver-intel-i915-hwmon
+++ b/Documentation/ABI/testing/sysfs-driver-intel-i915-hwmon
@@ -26,6 +26,15 @@ Description: RO. Card default power limit (default TDP
setting).
Only supported for particular Intel i915 graphics platforms.
+What: /sys/devices/.../hwmon/hwmon/power1_max_interval
+Date: February 2023
+KernelVersion: 6.2
+Contact: dri-devel@lists.freedesktop.org
+Description: RW. Sustained power limit interval (Tau in PL1/Tau) in
+ milliseconds over which sustained power is averaged.
+
+ Only supported for particular Intel i915 graphics platforms.
+
What: /sys/devices/.../hwmon/hwmon/power1_crit
Date: February 2023
KernelVersion:6.2
diff --git a/drivers/gpu/drm/i915/i915_hwmon.c
b/drivers/gpu/drm/i915/i915_hwmon.c
index 2394fa789793..641143956c45 100644
--- a/drivers/gpu/drm/i915/i915_hwmon.c
+++ b/drivers/gpu/drm/i915/i915_hwmon.c
@@ -20,11 +20,13 @@
* - power - microwatts
* - curr - milliamperes
* - energy - microjoules
+ * - time - milliseconds
*/
#define SF_VOLTAGE1000
#define SF_POWER 100
#define SF_CURR 1000
#define SF_ENERGY 100
+#define SF_TIME1000
struct hwm_reg {
i915_reg_t gt_perf_status;
@@ -53,6 +55,7 @@ struct i915_hwmon {
struct hwm_reg rg;
int scl_shift_power;
int scl_shift_energy;
+ int scl_shift_time;
};
static void
@@ -161,6 +164,115 @@ hwm_energy(struct hwm_drvdata *ddat, long *energy)
return 0;
}
+static ssize_t
+hwm_power1_max_interval_show(struct device *dev, struct device_attribute *attr,
+char *buf)
+{
+ struct hwm_drvdata *ddat = dev_get_drvdata(dev);
+ struct i915_hwmon *hwmon = ddat->hwmon;
+ intel_wakeref_t wakeref;
+ u32 r, x, y, x_w = 2; /* 2 bits */
+ u64 tau4, out;
+
+ with_intel_runtime_pm(ddat->uncore->rpm, wakeref)
+ r = intel_uncore_read(ddat->uncore, hwmon->rg.pkg_rapl_limit);
+
+ x = REG_FIELD_GET(PKG_PWR_LIM_1_TIME_X, r);
+ y = REG_FIELD_GET(PKG_PWR_LIM_1_TIME_Y, r);
+ /*
+* tau = 1.x * power(2,y), x = bits(23:22), y = bits(21:17)
+* = (4 | x) << (y - 2)
+* where (y - 2) ensures a 1.x fixed point representation of 1.x
+* However because y can be < 2, we compute
+* tau4 = (4 | x) << y
+* but add 2 when doing the final right shift to account for units
+*/
+ tau4 = ((1 << x_w) | x) << y;
+ /* val in hwmon interface units (millisec) */
+ out = mul_u64_u32_shr(tau4, SF_TIME, hwmon->scl_shift_time + x_w);
+
+ return sysfs_emit(buf, "%llu\n", out);
+}
+
+static ssize_t
+hwm_power1_max_interval_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct hwm_drvdata *ddat = dev_get_drvdata(dev);
+ struct i915_hwmon *hwmon = ddat->hwmon;
+ long val, max_win, ret;
+ u32 x, y, rxy, x_w = 2; /* 2 bits */
+ u64 tau4, r;
+
+#define PKG_MAX_WIN_DEFAULT 0x12ull
+
+ ret = kstrtoul(buf, 0, &val);
+ if (ret)
+ return ret;
+
+ /*
+* val must be < max in hwmon interface units. The steps below are
+* explained in i915_power1_max_interval_show()
+*/
+ r = FIELD_PREP(PKG_MAX_WIN, PKG_MAX_WIN_DEFAULT);
+
+ x = REG_FIELD_GET(PKG_MAX_WIN_X, r);
+ y = REG_FIELD_GET(PKG_MAX_WIN_Y, r);
+ tau4 = ((1 << x_w) | x)
[PATCH 6/7] drm/i915/hwmon: Expose power1_max_interval
From: Ashutosh Dixit
Expose power1_max_interval, that is the tau corresponding to PL1, as a
custom hwmon attribute. Some bit manipulation is needed because of the
format of PKG_PWR_LIM_1_TIME in
GT0_PACKAGE_RAPL_LIMIT register (1.x * power(2,y)).
v2: Update date and kernel version in Documentation (Badal)
v3: Cleaned up hwm_power1_max_interval_store() (Badal)
v4:
- Fixed review comments (Anshuman)
- In hwm_power1_max_interval_store() get PKG_MAX_WIN from
pkg_power_sku when it is valid (Ashutosh)
- KernelVersion: 6.2, Date: February 2023 in doc (Tvrtko)
v5: On some of the DGFX setups it is seen that although pkg_power_sku
is valid the field PKG_WIN_MAX is not populated. So it is
decided to stick to default value of PKG_WIN_MAX (Ashutosh)
Signed-off-by: Ashutosh Dixit
Signed-off-by: Badal Nilawar
Acked-by: Guenter Roeck
---
.../ABI/testing/sysfs-driver-intel-i915-hwmon | 9 ++
drivers/gpu/drm/i915/i915_hwmon.c | 115 +-
drivers/gpu/drm/i915/intel_mchbar_regs.h | 7 ++
3 files changed, 130 insertions(+), 1 deletion(-)
diff --git a/Documentation/ABI/testing/sysfs-driver-intel-i915-hwmon
b/Documentation/ABI/testing/sysfs-driver-intel-i915-hwmon
index f9d6d3b08bba..19b9fe3ef237 100644
--- a/Documentation/ABI/testing/sysfs-driver-intel-i915-hwmon
+++ b/Documentation/ABI/testing/sysfs-driver-intel-i915-hwmon
@@ -26,6 +26,15 @@ Description: RO. Card default power limit (default TDP
setting).
Only supported for particular Intel i915 graphics platforms.
+What: /sys/devices/.../hwmon/hwmon/power1_max_interval
+Date: February 2023
+KernelVersion: 6.2
+Contact: dri-devel@lists.freedesktop.org
+Description: RW. Sustained power limit interval (Tau in PL1/Tau) in
+ milliseconds over which sustained power is averaged.
+
+ Only supported for particular Intel i915 graphics platforms.
+
What: /sys/devices/.../hwmon/hwmon/power1_crit
Date: February 2023
KernelVersion: 6.2
diff --git a/drivers/gpu/drm/i915/i915_hwmon.c
b/drivers/gpu/drm/i915/i915_hwmon.c
index 2394fa789793..641143956c45 100644
--- a/drivers/gpu/drm/i915/i915_hwmon.c
+++ b/drivers/gpu/drm/i915/i915_hwmon.c
@@ -20,11 +20,13 @@
* - power - microwatts
* - curr - milliamperes
* - energy - microjoules
+ * - time - milliseconds
*/
#define SF_VOLTAGE 1000
#define SF_POWER 100
#define SF_CURR1000
#define SF_ENERGY 100
+#define SF_TIME1000
struct hwm_reg {
i915_reg_t gt_perf_status;
@@ -53,6 +55,7 @@ struct i915_hwmon {
struct hwm_reg rg;
int scl_shift_power;
int scl_shift_energy;
+ int scl_shift_time;
};
static void
@@ -161,6 +164,115 @@ hwm_energy(struct hwm_drvdata *ddat, long *energy)
return 0;
}
+static ssize_t
+hwm_power1_max_interval_show(struct device *dev, struct device_attribute *attr,
+char *buf)
+{
+ struct hwm_drvdata *ddat = dev_get_drvdata(dev);
+ struct i915_hwmon *hwmon = ddat->hwmon;
+ intel_wakeref_t wakeref;
+ u32 r, x, y, x_w = 2; /* 2 bits */
+ u64 tau4, out;
+
+ with_intel_runtime_pm(ddat->uncore->rpm, wakeref)
+ r = intel_uncore_read(ddat->uncore, hwmon->rg.pkg_rapl_limit);
+
+ x = REG_FIELD_GET(PKG_PWR_LIM_1_TIME_X, r);
+ y = REG_FIELD_GET(PKG_PWR_LIM_1_TIME_Y, r);
+ /*
+* tau = 1.x * power(2,y), x = bits(23:22), y = bits(21:17)
+* = (4 | x) << (y - 2)
+* where (y - 2) ensures a 1.x fixed point representation of 1.x
+* However because y can be < 2, we compute
+* tau4 = (4 | x) << y
+* but add 2 when doing the final right shift to account for units
+*/
+ tau4 = ((1 << x_w) | x) << y;
+ /* val in hwmon interface units (millisec) */
+ out = mul_u64_u32_shr(tau4, SF_TIME, hwmon->scl_shift_time + x_w);
+
+ return sysfs_emit(buf, "%llu\n", out);
+}
+
+static ssize_t
+hwm_power1_max_interval_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct hwm_drvdata *ddat = dev_get_drvdata(dev);
+ struct i915_hwmon *hwmon = ddat->hwmon;
+ long val, max_win, ret;
+ u32 x, y, rxy, x_w = 2; /* 2 bits */
+ u64 tau4, r;
+
+#define PKG_MAX_WIN_DEFAULT 0x12ull
+
+ ret = kstrtoul(buf, 0, &val);
+ if (ret)
+ return ret;
+
+ /*
+* val must be < max in hwmon interface units. The steps below are
+* explained in i915_power1_max_interval_show()
+*/
+ r = FIELD_PREP(PKG_MAX_WIN, PKG_MAX_WIN_DEFAULT);
+
+ x = REG_FIELD_GET(PKG_MAX_WIN_X, r);
+ y = REG_FIELD_GET(PKG_MAX_WIN_Y, r);
+ tau4 = ((1 << x_w) | x) << y;
+ max_win = mul_u64_u32_shr(tau4, SF_TIME, hwmon->scl_shift_time + x_w);
+
+ if (
[PATCH 6/7] drm/i915/hwmon: Expose power1_max_interval
From: Ashutosh Dixit
Expose power1_max_interval, that is the tau corresponding to PL1, as a
custom hwmon attribute. Some bit manipulation is needed because of the
format of PKG_PWR_LIM_1_TIME in
GT0_PACKAGE_RAPL_LIMIT register (1.x * power(2,y)).
v2: Update date and kernel version in Documentation (Badal)
v3: Cleaned up hwm_power1_max_interval_store() (Badal)
v4:
- Fixed review comments (Anshuman)
- In hwm_power1_max_interval_store() get PKG_MAX_WIN from
pkg_power_sku when it is valid (Ashutosh)
- KernelVersion: 6.2, Date: February 2023 in doc (Tvrtko)
v5: On some of the DGFX setups it is seen that although pkg_power_sku
is valid the field PKG_WIN_MAX is not populated. So it is
decided to stick to default value of PKG_WIN_MAX (Ashutosh)
Signed-off-by: Ashutosh Dixit
Signed-off-by: Badal Nilawar
Acked-by: Guenter Roeck
---
.../ABI/testing/sysfs-driver-intel-i915-hwmon | 9 ++
drivers/gpu/drm/i915/i915_hwmon.c | 115 +-
drivers/gpu/drm/i915/intel_mchbar_regs.h | 7 ++
3 files changed, 130 insertions(+), 1 deletion(-)
diff --git a/Documentation/ABI/testing/sysfs-driver-intel-i915-hwmon
b/Documentation/ABI/testing/sysfs-driver-intel-i915-hwmon
index f9d6d3b08bba..19b9fe3ef237 100644
--- a/Documentation/ABI/testing/sysfs-driver-intel-i915-hwmon
+++ b/Documentation/ABI/testing/sysfs-driver-intel-i915-hwmon
@@ -26,6 +26,15 @@ Description: RO. Card default power limit (default TDP
setting).
Only supported for particular Intel i915 graphics platforms.
+What: /sys/devices/.../hwmon/hwmon/power1_max_interval
+Date: February 2023
+KernelVersion: 6.2
+Contact: dri-devel@lists.freedesktop.org
+Description: RW. Sustained power limit interval (Tau in PL1/Tau) in
+ milliseconds over which sustained power is averaged.
+
+ Only supported for particular Intel i915 graphics platforms.
+
What: /sys/devices/.../hwmon/hwmon/power1_crit
Date: February 2023
KernelVersion: 6.2
diff --git a/drivers/gpu/drm/i915/i915_hwmon.c
b/drivers/gpu/drm/i915/i915_hwmon.c
index 2394fa789793..641143956c45 100644
--- a/drivers/gpu/drm/i915/i915_hwmon.c
+++ b/drivers/gpu/drm/i915/i915_hwmon.c
@@ -20,11 +20,13 @@
* - power - microwatts
* - curr - milliamperes
* - energy - microjoules
+ * - time - milliseconds
*/
#define SF_VOLTAGE 1000
#define SF_POWER 100
#define SF_CURR1000
#define SF_ENERGY 100
+#define SF_TIME1000
struct hwm_reg {
i915_reg_t gt_perf_status;
@@ -53,6 +55,7 @@ struct i915_hwmon {
struct hwm_reg rg;
int scl_shift_power;
int scl_shift_energy;
+ int scl_shift_time;
};
static void
@@ -161,6 +164,115 @@ hwm_energy(struct hwm_drvdata *ddat, long *energy)
return 0;
}
+static ssize_t
+hwm_power1_max_interval_show(struct device *dev, struct device_attribute *attr,
+char *buf)
+{
+ struct hwm_drvdata *ddat = dev_get_drvdata(dev);
+ struct i915_hwmon *hwmon = ddat->hwmon;
+ intel_wakeref_t wakeref;
+ u32 r, x, y, x_w = 2; /* 2 bits */
+ u64 tau4, out;
+
+ with_intel_runtime_pm(ddat->uncore->rpm, wakeref)
+ r = intel_uncore_read(ddat->uncore, hwmon->rg.pkg_rapl_limit);
+
+ x = REG_FIELD_GET(PKG_PWR_LIM_1_TIME_X, r);
+ y = REG_FIELD_GET(PKG_PWR_LIM_1_TIME_Y, r);
+ /*
+* tau = 1.x * power(2,y), x = bits(23:22), y = bits(21:17)
+* = (4 | x) << (y - 2)
+* where (y - 2) ensures a 1.x fixed point representation of 1.x
+* However because y can be < 2, we compute
+* tau4 = (4 | x) << y
+* but add 2 when doing the final right shift to account for units
+*/
+ tau4 = ((1 << x_w) | x) << y;
+ /* val in hwmon interface units (millisec) */
+ out = mul_u64_u32_shr(tau4, SF_TIME, hwmon->scl_shift_time + x_w);
+
+ return sysfs_emit(buf, "%llu\n", out);
+}
+
+static ssize_t
+hwm_power1_max_interval_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct hwm_drvdata *ddat = dev_get_drvdata(dev);
+ struct i915_hwmon *hwmon = ddat->hwmon;
+ long val, max_win, ret;
+ u32 x, y, rxy, x_w = 2; /* 2 bits */
+ u64 tau4, r;
+
+#define PKG_MAX_WIN_DEFAULT 0x12ull
+
+ ret = kstrtoul(buf, 0, &val);
+ if (ret)
+ return ret;
+
+ /*
+* val must be < max in hwmon interface units. The steps below are
+* explained in i915_power1_max_interval_show()
+*/
+ r = FIELD_PREP(PKG_MAX_WIN, PKG_MAX_WIN_DEFAULT);
+
+ x = REG_FIELD_GET(PKG_MAX_WIN_X, r);
+ y = REG_FIELD_GET(PKG_MAX_WIN_Y, r);
+ tau4 = ((1 << x_w) | x) << y;
+ max_win = mul_u64_u32_shr(tau4, SF_TIME, hwmon->scl_shift_time + x_w);
+
+ if (
Re: [PATCH 6/7] drm/i915/hwmon: Expose power1_max_interval
On Fri, 23 Sep 2022 12:56:42 -0700, Badal Nilawar wrote: > > From: Ashutosh Dixit > > Expose power1_max_interval, that is the tau corresponding to PL1. I think let's change the above sentence to: "Expose power1_max_interval, that is the tau corresponding to PL1, as a custom hwmon attribute". This is the only custom attribute we are exposing so better to mention this in the commit message I think. Thanks. -- Ashutosh
[PATCH 6/7] drm/i915/hwmon: Expose power1_max_interval
From: Ashutosh Dixit
Expose power1_max_interval, that is the tau corresponding to PL1. Some bit
manipulation is needed because of the format of PKG_PWR_LIM_1_TIME in
GT0_PACKAGE_RAPL_LIMIT register (1.x * power(2,y)).
v2: Update date and kernel version in Documentation (Badal)
v3: Cleaned up hwm_power1_max_interval_store() (Badal)
v4:
- Fixed review comments (Anshuman)
- In hwm_power1_max_interval_store() get PKG_MAX_WIN from
pkg_power_sku when it is valid (Ashutosh)
- KernelVersion: 6.2, Date: February 2023 in doc (Tvrtko)
Signed-off-by: Ashutosh Dixit
Signed-off-by: Badal Nilawar
Acked-by: Guenter Roeck
---
.../ABI/testing/sysfs-driver-intel-i915-hwmon | 9 ++
drivers/gpu/drm/i915/i915_hwmon.c | 120 +-
drivers/gpu/drm/i915/intel_mchbar_regs.h | 7 +
3 files changed, 135 insertions(+), 1 deletion(-)
diff --git a/Documentation/ABI/testing/sysfs-driver-intel-i915-hwmon
b/Documentation/ABI/testing/sysfs-driver-intel-i915-hwmon
index f9d6d3b08bba..19b9fe3ef237 100644
--- a/Documentation/ABI/testing/sysfs-driver-intel-i915-hwmon
+++ b/Documentation/ABI/testing/sysfs-driver-intel-i915-hwmon
@@ -26,6 +26,15 @@ Description: RO. Card default power limit (default TDP
setting).
Only supported for particular Intel i915 graphics platforms.
+What: /sys/devices/.../hwmon/hwmon/power1_max_interval
+Date: February 2023
+KernelVersion: 6.2
+Contact: dri-devel@lists.freedesktop.org
+Description: RW. Sustained power limit interval (Tau in PL1/Tau) in
+ milliseconds over which sustained power is averaged.
+
+ Only supported for particular Intel i915 graphics platforms.
+
What: /sys/devices/.../hwmon/hwmon/power1_crit
Date: February 2023
KernelVersion: 6.2
diff --git a/drivers/gpu/drm/i915/i915_hwmon.c
b/drivers/gpu/drm/i915/i915_hwmon.c
index f743ac5c59c4..b95f54d274be 100644
--- a/drivers/gpu/drm/i915/i915_hwmon.c
+++ b/drivers/gpu/drm/i915/i915_hwmon.c
@@ -20,11 +20,13 @@
* - power - microwatts
* - curr - milliamperes
* - energy - microjoules
+ * - time - milliseconds
*/
#define SF_VOLTAGE 1000
#define SF_POWER 100
#define SF_CURR1000
#define SF_ENERGY 100
+#define SF_TIME1000
struct hwm_reg {
i915_reg_t gt_perf_status;
@@ -53,6 +55,7 @@ struct i915_hwmon {
struct hwm_reg rg;
int scl_shift_power;
int scl_shift_energy;
+ int scl_shift_time;
};
static void
@@ -161,6 +164,120 @@ hwm_energy(struct hwm_drvdata *ddat, long *energy)
return 0;
}
+static ssize_t
+hwm_power1_max_interval_show(struct device *dev, struct device_attribute *attr,
+char *buf)
+{
+ struct hwm_drvdata *ddat = dev_get_drvdata(dev);
+ struct i915_hwmon *hwmon = ddat->hwmon;
+ intel_wakeref_t wakeref;
+ u32 r, x, y, x_w = 2; /* 2 bits */
+ u64 tau4, out;
+
+ with_intel_runtime_pm(ddat->uncore->rpm, wakeref)
+ r = intel_uncore_read(ddat->uncore, hwmon->rg.pkg_rapl_limit);
+
+ x = REG_FIELD_GET(PKG_PWR_LIM_1_TIME_X, r);
+ y = REG_FIELD_GET(PKG_PWR_LIM_1_TIME_Y, r);
+ /*
+* tau = 1.x * power(2,y), x = bits(23:22), y = bits(21:17)
+* = (4 | x) << (y - 2)
+* where (y - 2) ensures a 1.x fixed point representation of 1.x
+* However because y can be < 2, we compute
+* tau4 = (4 | x) << y
+* but add 2 when doing the final right shift to account for units
+*/
+ tau4 = ((1 << x_w) | x) << y;
+ /* val in hwmon interface units (millisec) */
+ out = mul_u64_u32_shr(tau4, SF_TIME, hwmon->scl_shift_time + x_w);
+
+ return sysfs_emit(buf, "%llu\n", out);
+}
+
+static ssize_t
+hwm_power1_max_interval_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct hwm_drvdata *ddat = dev_get_drvdata(dev);
+ struct i915_hwmon *hwmon = ddat->hwmon;
+ intel_wakeref_t wakeref;
+ long val, max_win, ret;
+ u32 x, y, rxy, x_w = 2; /* 2 bits */
+ u64 tau4, r;
+
+#define PKG_MAX_WIN_DEFAULT 0x12ull
+
+ ret = kstrtoul(buf, 0, &val);
+ if (ret)
+ return ret;
+
+ /*
+* val must be < max in hwmon interface units. The steps below are
+* explained in i915_power1_max_interval_show()
+*/
+ if (i915_mmio_reg_valid(hwmon->rg.pkg_power_sku))
+ with_intel_runtime_pm(ddat->uncore->rpm, wakeref)
+ r = intel_uncore_read64(ddat->uncore,
hwmon->rg.pkg_power_sku);
+ else
+ r = FIELD_PREP(PKG_MAX_WIN, PKG_MAX_WIN_DEFAULT);
+
+ x = REG_FIELD_GET(PKG_MAX_WIN_X, r);
+ y = REG_FIELD_GET(PKG_MAX_WIN_Y, r);
+ tau4 = ((1 << x_w) | x) << y;
+ max_win = mul_u64_u32_shr(tau4, SF_TIME, hwm
Re: [PATCH 6/7] drm/i915/hwmon: Expose power1_max_interval
On Thu, 22 Sep 2022 19:51:45 -0700, Dixit, Ashutosh wrote:
>
> On Thu, 22 Sep 2022 00:13:00 -0700, Gupta, Anshuman wrote:
> >
>
> Hi Anshuman,
>
> > > +static ssize_t
> > > +hwm_power1_max_interval_store(struct device *dev,
> > > + struct device_attribute *attr,
> > > + const char *buf, size_t count)
> > > +{
> > > + struct hwm_drvdata *ddat = dev_get_drvdata(dev);
> > > + struct i915_hwmon *hwmon = ddat->hwmon;
> > > + long val, max_win, ret;
> > > + u32 x, y, rxy, x_w = 2; /* 2 bits */
> > > + u64 tau4, r;
> > > +
> > > +#define PKG_MAX_WIN_DEFAULT 0x12ull
> > > +
> > > + ret = kstrtoul(buf, 0, &val);
> > > + if (ret)
> > > + return ret;
> > > +
> > > + /*
> > > + * val must be < max in hwmon interface units. The steps below are
> > > + * explained in i915_power1_max_interval_show()
> > > + */
> > > + r = FIELD_PREP(PKG_MAX_WIN, PKG_MAX_WIN_DEFAULT);
> >
> > AFAIU we need to read r from PACKAGE_POWER_SKU reg untill unless it has
> > some known issue?
>
> The platform on which I tried had an incorrect value (that is why I didn't
> read it from PACKAGE_POWER_SKU) but let me investigate it some more for
> other platforms and get back.
I checked, the value is correct on DG1/DG2 which have a valid
PACKAGE_POWER_SKU (XEHPSDV does not have a valid
PACKAGE_POWER_SKU). Therefore the one line above should be replaced with
the code below:
if (i915_mmio_reg_valid(hwmon->rg.pkg_power_sku))
with_intel_runtime_pm(ddat->uncore->rpm, wakeref)
r = intel_uncore_read64(ddat->uncore,
hwmon->rg.pkg_power_sku);
else
r = FIELD_PREP(PKG_MAX_WIN, PKG_MAX_WIN_DEFAULT);
> > > + x = REG_FIELD_GET(PKG_MAX_WIN_X, r);
> > > + y = REG_FIELD_GET(PKG_MAX_WIN_Y, r);
> > > + tau4 = ((1 << x_w) | x) << y;
> > > + max_win = mul_u64_u32_shr(tau4, SF_TIME, hwmon->scl_shift_time + x_w);
> > > +
> > > + if (val > max_win)
> > > + return -EINVAL;
> > > +
> > > + /* val in hw units */
> > > + val = DIV_ROUND_CLOSEST_ULL((u64)val << hwmon->scl_shift_time, SF_TIME);
> > > + /* Convert to 1.x * power(2,y) */
> > > + if (!val)
> > > + return -EINVAL;
> > > + y = ilog2(val);
> > > + /* x = (val - (1 << y)) >> (y - 2); */
> > > + x = (val - (1ul << y)) << x_w >> y;
> > > +
> > > + rxy = REG_FIELD_PREP(PKG_PWR_LIM_1_TIME_X, x) |
> > > REG_FIELD_PREP(PKG_PWR_LIM_1_TIME_Y, y);
> > > +
> > > + hwm_locked_with_pm_intel_uncore_rmw(ddat, hwmon->rg.pkg_rapl_limit,
> > > + PKG_PWR_LIM_1_TIME, rxy);
> > > + return count;
> > > +}
> > > +
> > /snip
> > > if (IS_ERR(hwmon_dev)) {
> > > mutex_destroy(&hwmon->hwmon_lock);
> > > i915->hwmon = NULL;
> > > diff --git a/drivers/gpu/drm/i915/i915_reg.h
> > > b/drivers/gpu/drm/i915/i915_reg.h
> > > index 956e5298ef1e..68e7cc85dc53 100644
> > > --- a/drivers/gpu/drm/i915/i915_reg.h
> > > +++ b/drivers/gpu/drm/i915/i915_reg.h
> > > @@ -1811,6 +1811,9 @@
> > >* *_PACKAGE_POWER_SKU - SKU power and timing parameters.
> > >*/
> > > #define PKG_PKG_TDP GENMASK_ULL(14, 0)
> > > +#define PKG_MAX_WINGENMASK_ULL(54, 48)
> > > +#define PKG_MAX_WIN_XGENMASK_ULL(54, 53)
> > > +#define PKG_MAX_WIN_YGENMASK_ULL(52, 48)
> > These GENMASK fields needs a reg definition.
>
> Yes this is the same _PACKAGE_POWER_SKU register so should get fixed when
> we add it in Patch 3.
Looks like PCU_PACKAGE_POWER_SKU for DG1/DG2 will need to be declared in
intel_mchbar_regs.h so these fields will need to also move there (in
Patch 3).
Thanks.
--
Ashutosh
Re: [PATCH 6/7] drm/i915/hwmon: Expose power1_max_interval
On Thu, 22 Sep 2022 00:13:00 -0700, Gupta, Anshuman wrote:
>
Hi Anshuman,
> > +static ssize_t
> > +hwm_power1_max_interval_store(struct device *dev,
> > + struct device_attribute *attr,
> > + const char *buf, size_t count)
> > +{
> > + struct hwm_drvdata *ddat = dev_get_drvdata(dev);
> > + struct i915_hwmon *hwmon = ddat->hwmon;
> > + long val, max_win, ret;
> > + u32 x, y, rxy, x_w = 2; /* 2 bits */
> > + u64 tau4, r;
> > +
> > +#define PKG_MAX_WIN_DEFAULT 0x12ull
> > +
> > + ret = kstrtoul(buf, 0, &val);
> > + if (ret)
> > + return ret;
> > +
> > + /*
> > +* val must be < max in hwmon interface units. The steps below are
> > +* explained in i915_power1_max_interval_show()
> > +*/
> > + r = FIELD_PREP(PKG_MAX_WIN, PKG_MAX_WIN_DEFAULT);
>
> AFAIU we need to read r from PACKAGE_POWER_SKU reg untill unless it has
> some known issue?
The platform on which I tried had an incorrect value (that is why I didn't
read it from PACKAGE_POWER_SKU) but let me investigate it some more for
other platforms and get back.
> > + x = REG_FIELD_GET(PKG_MAX_WIN_X, r);
> > + y = REG_FIELD_GET(PKG_MAX_WIN_Y, r);
> > + tau4 = ((1 << x_w) | x) << y;
> > + max_win = mul_u64_u32_shr(tau4, SF_TIME, hwmon->scl_shift_time + x_w);
> > +
> > + if (val > max_win)
> > + return -EINVAL;
> > +
> > + /* val in hw units */
> > + val = DIV_ROUND_CLOSEST_ULL((u64)val << hwmon->scl_shift_time, SF_TIME);
> > + /* Convert to 1.x * power(2,y) */
> > + if (!val)
> > + return -EINVAL;
> > + y = ilog2(val);
> > + /* x = (val - (1 << y)) >> (y - 2); */
> > + x = (val - (1ul << y)) << x_w >> y;
> > +
> > + rxy = REG_FIELD_PREP(PKG_PWR_LIM_1_TIME_X, x) |
> > REG_FIELD_PREP(PKG_PWR_LIM_1_TIME_Y, y);
> > +
> > + hwm_locked_with_pm_intel_uncore_rmw(ddat, hwmon->rg.pkg_rapl_limit,
> > + PKG_PWR_LIM_1_TIME, rxy);
> > + return count;
> > +}
> > +
> /snip
> > if (IS_ERR(hwmon_dev)) {
> > mutex_destroy(&hwmon->hwmon_lock);
> > i915->hwmon = NULL;
> > diff --git a/drivers/gpu/drm/i915/i915_reg.h
> > b/drivers/gpu/drm/i915/i915_reg.h
> > index 956e5298ef1e..68e7cc85dc53 100644
> > --- a/drivers/gpu/drm/i915/i915_reg.h
> > +++ b/drivers/gpu/drm/i915/i915_reg.h
> > @@ -1811,6 +1811,9 @@
> >* *_PACKAGE_POWER_SKU - SKU power and timing parameters.
> >*/
> > #define PKG_PKG_TDP GENMASK_ULL(14, 0)
> > +#define PKG_MAX_WIN GENMASK_ULL(54, 48)
> > +#define PKG_MAX_WIN_X GENMASK_ULL(54, 53)
> > +#define PKG_MAX_WIN_Y GENMASK_ULL(52, 48)
> These GENMASK fields needs a reg definition.
Yes this is the same _PACKAGE_POWER_SKU register so should get fixed when
we add it in Patch 3.
Thanks.
--
Ashutosh
Re: [PATCH 6/7] drm/i915/hwmon: Expose power1_max_interval
On 9/16/2022 8:30 PM, Badal Nilawar wrote:
From: Ashutosh Dixit
Expose power1_max_interval, that is the tau corresponding to PL1. Some bit
manipulation is needed because of the format of PKG_PWR_LIM_1_TIME in
GT0_PACKAGE_RAPL_LIMIT register (1.x * power(2,y)).
v2: Update date and kernel version in Documentation (Badal)
v3: Cleaned up hwm_power1_max_interval_store() (Badal)
Signed-off-by: Ashutosh Dixit
Signed-off-by: Badal Nilawar
Acked-by: Guenter Roeck
---
.../ABI/testing/sysfs-driver-intel-i915-hwmon | 9 ++
drivers/gpu/drm/i915/i915_hwmon.c | 114 +-
drivers/gpu/drm/i915/i915_reg.h | 3 +
drivers/gpu/drm/i915/intel_mchbar_regs.h | 4 +
4 files changed, 129 insertions(+), 1 deletion(-)
diff --git a/Documentation/ABI/testing/sysfs-driver-intel-i915-hwmon
b/Documentation/ABI/testing/sysfs-driver-intel-i915-hwmon
index cc70596fff44..7995a885c9d6 100644
--- a/Documentation/ABI/testing/sysfs-driver-intel-i915-hwmon
+++ b/Documentation/ABI/testing/sysfs-driver-intel-i915-hwmon
@@ -26,6 +26,15 @@ Description: RO. Card default power limit (default TDP
setting).
Only supported for particular Intel i915 graphics platforms.
+What: /sys/devices/.../hwmon/hwmon/power1_max_interval
+Date: September 2022
+KernelVersion: 6
+Contact: dri-devel@lists.freedesktop.org
+Description: RW. Sustained power limit interval (Tau in PL1/Tau) in
+ milliseconds over which sustained power is averaged.
+
+ Only supported for particular Intel i915 graphics platforms.
+
What: /sys/devices/.../hwmon/hwmon/power1_crit
Date: September 2022
KernelVersion:6
diff --git a/drivers/gpu/drm/i915/i915_hwmon.c
b/drivers/gpu/drm/i915/i915_hwmon.c
index bd9ba312c474..7d85a81bc39b 100644
--- a/drivers/gpu/drm/i915/i915_hwmon.c
+++ b/drivers/gpu/drm/i915/i915_hwmon.c
@@ -20,11 +20,13 @@
* - power - microwatts
* - curr - milliamperes
* - energy - microjoules
+ * - time - milliseconds
*/
#define SF_VOLTAGE1000
#define SF_POWER 100
#define SF_CURR 1000
#define SF_ENERGY 100
+#define SF_TIME1000
struct hwm_reg {
i915_reg_t gt_perf_status;
@@ -53,6 +55,7 @@ struct i915_hwmon {
struct hwm_reg rg;
int scl_shift_power;
int scl_shift_energy;
+ int scl_shift_time;
};
static void
@@ -161,6 +164,114 @@ hwm_energy(struct hwm_drvdata *ddat, long *energy)
return 0;
}
+static ssize_t
+hwm_power1_max_interval_show(struct device *dev, struct device_attribute *attr,
+char *buf)
+{
+ struct hwm_drvdata *ddat = dev_get_drvdata(dev);
+ struct i915_hwmon *hwmon = ddat->hwmon;
+ intel_wakeref_t wakeref;
+ u32 r, x, y, x_w = 2; /* 2 bits */
+ u64 tau4, out;
+
+ with_intel_runtime_pm(ddat->uncore->rpm, wakeref)
+ r = intel_uncore_read(ddat->uncore, hwmon->rg.pkg_rapl_limit);
+
+ x = REG_FIELD_GET(PKG_PWR_LIM_1_TIME_X, r);
+ y = REG_FIELD_GET(PKG_PWR_LIM_1_TIME_Y, r);
+ /*
+* tau = 1.x * power(2,y), x = bits(23:22), y = bits(21:17)
+* = (4 | x) << (y - 2)
+* where (y - 2) ensures a 1.x fixed point representation of 1.x
+* However because y can be < 2, we compute
+* tau4 = (4 | x) << y
+* but add 2 when doing the final right shift to account for units
+*/
+ tau4 = ((1 << x_w) | x) << y;
+ /* val in hwmon interface units (millisec) */
+ out = mul_u64_u32_shr(tau4, SF_TIME, hwmon->scl_shift_time + x_w);
+
+ return sysfs_emit(buf, "%llu\n", out);
+}
+
+static ssize_t
+hwm_power1_max_interval_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct hwm_drvdata *ddat = dev_get_drvdata(dev);
+ struct i915_hwmon *hwmon = ddat->hwmon;
+ long val, max_win, ret;
+ u32 x, y, rxy, x_w = 2; /* 2 bits */
+ u64 tau4, r;
+
+#define PKG_MAX_WIN_DEFAULT 0x12ull
+
+ ret = kstrtoul(buf, 0, &val);
+ if (ret)
+ return ret;
+
+ /*
+* val must be < max in hwmon interface units. The steps below are
+* explained in i915_power1_max_interval_show()
+*/
+ r = FIELD_PREP(PKG_MAX_WIN, PKG_MAX_WIN_DEFAULT);
AFAIU we need to read r from PACKAGE_POWER_SKU reg untill unless it has
some known issue?
+ x = REG_FIELD_GET(PKG_MAX_WIN_X, r);
+ y = REG_FIELD_GET(PKG_MAX_WIN_Y, r);
+ tau4 = ((1 << x_w) | x) << y;
+ max_win = mul_u64_u32_shr(tau4, SF_TIME, hwmon->scl_shift_time + x_w);
+
+ if (val > max_win)
+ return -EINVAL;
+
+ /* val in hw units */
+ val = DIV_ROUND_CLOSEST_ULL((u64)val << hwmon->scl_shift_time, SF_TIME);
+ /* Convert to 1.x * power(2,y) */
+ if (!val)
+
[PATCH 6/7] drm/i915/hwmon: Expose power1_max_interval
From: Ashutosh Dixit
Expose power1_max_interval, that is the tau corresponding to PL1. Some bit
manipulation is needed because of the format of PKG_PWR_LIM_1_TIME in
GT0_PACKAGE_RAPL_LIMIT register (1.x * power(2,y)).
v2: Update date and kernel version in Documentation (Badal)
v3: Cleaned up hwm_power1_max_interval_store() (Badal)
Signed-off-by: Ashutosh Dixit
Signed-off-by: Badal Nilawar
Acked-by: Guenter Roeck
---
.../ABI/testing/sysfs-driver-intel-i915-hwmon | 9 ++
drivers/gpu/drm/i915/i915_hwmon.c | 114 +-
drivers/gpu/drm/i915/i915_reg.h | 3 +
drivers/gpu/drm/i915/intel_mchbar_regs.h | 4 +
4 files changed, 129 insertions(+), 1 deletion(-)
diff --git a/Documentation/ABI/testing/sysfs-driver-intel-i915-hwmon
b/Documentation/ABI/testing/sysfs-driver-intel-i915-hwmon
index cc70596fff44..7995a885c9d6 100644
--- a/Documentation/ABI/testing/sysfs-driver-intel-i915-hwmon
+++ b/Documentation/ABI/testing/sysfs-driver-intel-i915-hwmon
@@ -26,6 +26,15 @@ Description: RO. Card default power limit (default TDP
setting).
Only supported for particular Intel i915 graphics platforms.
+What: /sys/devices/.../hwmon/hwmon/power1_max_interval
+Date: September 2022
+KernelVersion: 6
+Contact: dri-devel@lists.freedesktop.org
+Description: RW. Sustained power limit interval (Tau in PL1/Tau) in
+ milliseconds over which sustained power is averaged.
+
+ Only supported for particular Intel i915 graphics platforms.
+
What: /sys/devices/.../hwmon/hwmon/power1_crit
Date: September 2022
KernelVersion: 6
diff --git a/drivers/gpu/drm/i915/i915_hwmon.c
b/drivers/gpu/drm/i915/i915_hwmon.c
index bd9ba312c474..7d85a81bc39b 100644
--- a/drivers/gpu/drm/i915/i915_hwmon.c
+++ b/drivers/gpu/drm/i915/i915_hwmon.c
@@ -20,11 +20,13 @@
* - power - microwatts
* - curr - milliamperes
* - energy - microjoules
+ * - time - milliseconds
*/
#define SF_VOLTAGE 1000
#define SF_POWER 100
#define SF_CURR1000
#define SF_ENERGY 100
+#define SF_TIME1000
struct hwm_reg {
i915_reg_t gt_perf_status;
@@ -53,6 +55,7 @@ struct i915_hwmon {
struct hwm_reg rg;
int scl_shift_power;
int scl_shift_energy;
+ int scl_shift_time;
};
static void
@@ -161,6 +164,114 @@ hwm_energy(struct hwm_drvdata *ddat, long *energy)
return 0;
}
+static ssize_t
+hwm_power1_max_interval_show(struct device *dev, struct device_attribute *attr,
+char *buf)
+{
+ struct hwm_drvdata *ddat = dev_get_drvdata(dev);
+ struct i915_hwmon *hwmon = ddat->hwmon;
+ intel_wakeref_t wakeref;
+ u32 r, x, y, x_w = 2; /* 2 bits */
+ u64 tau4, out;
+
+ with_intel_runtime_pm(ddat->uncore->rpm, wakeref)
+ r = intel_uncore_read(ddat->uncore, hwmon->rg.pkg_rapl_limit);
+
+ x = REG_FIELD_GET(PKG_PWR_LIM_1_TIME_X, r);
+ y = REG_FIELD_GET(PKG_PWR_LIM_1_TIME_Y, r);
+ /*
+* tau = 1.x * power(2,y), x = bits(23:22), y = bits(21:17)
+* = (4 | x) << (y - 2)
+* where (y - 2) ensures a 1.x fixed point representation of 1.x
+* However because y can be < 2, we compute
+* tau4 = (4 | x) << y
+* but add 2 when doing the final right shift to account for units
+*/
+ tau4 = ((1 << x_w) | x) << y;
+ /* val in hwmon interface units (millisec) */
+ out = mul_u64_u32_shr(tau4, SF_TIME, hwmon->scl_shift_time + x_w);
+
+ return sysfs_emit(buf, "%llu\n", out);
+}
+
+static ssize_t
+hwm_power1_max_interval_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct hwm_drvdata *ddat = dev_get_drvdata(dev);
+ struct i915_hwmon *hwmon = ddat->hwmon;
+ long val, max_win, ret;
+ u32 x, y, rxy, x_w = 2; /* 2 bits */
+ u64 tau4, r;
+
+#define PKG_MAX_WIN_DEFAULT 0x12ull
+
+ ret = kstrtoul(buf, 0, &val);
+ if (ret)
+ return ret;
+
+ /*
+* val must be < max in hwmon interface units. The steps below are
+* explained in i915_power1_max_interval_show()
+*/
+ r = FIELD_PREP(PKG_MAX_WIN, PKG_MAX_WIN_DEFAULT);
+ x = REG_FIELD_GET(PKG_MAX_WIN_X, r);
+ y = REG_FIELD_GET(PKG_MAX_WIN_Y, r);
+ tau4 = ((1 << x_w) | x) << y;
+ max_win = mul_u64_u32_shr(tau4, SF_TIME, hwmon->scl_shift_time + x_w);
+
+ if (val > max_win)
+ return -EINVAL;
+
+ /* val in hw units */
+ val = DIV_ROUND_CLOSEST_ULL((u64)val << hwmon->scl_shift_time, SF_TIME);
+ /* Convert to 1.x * power(2,y) */
+ if (!val)
+ return -EINVAL;
+ y = ilog2(val);
+ /* x = (val - (1 << y)) >> (y - 2); */
+ x = (val - (1ul << y)) << x_w >> y;
+
+ rxy =
