[Intel-gfx] [PATCH 5/8] drm/i915/gt: Add media RP0/RPn to per-gt sysfs

[Kamil Konieczny]

Hi Ashutosh,

On 2022-04-13 at 11:11:06 -0700, Ashutosh Dixit wrote:
> Retrieve RP0 and RPn freq for media IP from PCODE and display in per-gt
> sysfs. This patch adds the following files to gt/gtN sysfs:
> * media_RP0_freq_mhz
> * media_RPn_freq_mhz
--------- ^
Can we keep it in lowercase ? So it will be like:
media_rp0_freq_mhz
media_rpn_freq_mhz

Or is it merged with capital letters at other sysfs path ?

Regards,
Kamil

> 
> Cc: Rodrigo Vivi <rodrigo.vivi at intel.com>
> Cc: Joonas Lahtinen <joonas.lahtinen at linux.intel.com>
> Original-author: Dale B Stimson <dale.b.stimson at intel.com>
> Signed-off-by: Dale B Stimson <dale.b.stimson at intel.com>
> Signed-off-by: Ashutosh Dixit <ashutosh.dixit at intel.com>
> ---
>  drivers/gpu/drm/i915/gt/intel_gt_sysfs_pm.c | 47 +++++++++++++++++++++
>  drivers/gpu/drm/i915/i915_reg.h             | 15 +++++++
>  2 files changed, 62 insertions(+)
> 
> diff --git a/drivers/gpu/drm/i915/gt/intel_gt_sysfs_pm.c b/drivers/gpu/drm/i915/gt/intel_gt_sysfs_pm.c
> index 2b1cd6a01724..2a3398003933 100644
> --- a/drivers/gpu/drm/i915/gt/intel_gt_sysfs_pm.c
> +++ b/drivers/gpu/drm/i915/gt/intel_gt_sysfs_pm.c
> @@ -12,6 +12,7 @@
>  #include "i915_sysfs.h"
>  #include "intel_gt.h"
>  #include "intel_gt_regs.h"
> +#include "intel_pcode.h"
>  #include "intel_gt_sysfs.h"
>  #include "intel_gt_sysfs_pm.h"
>  #include "intel_rc6.h"
> @@ -669,13 +670,59 @@ static ssize_t media_freq_factor_store(struct device *dev,
>  	return err ?: count;
>  }
>  
> +static ssize_t media_RP0_freq_mhz_show(struct device *dev,
> +				       struct device_attribute *attr,
> +				       char *buff)
> +{
> +	struct intel_gt *gt = intel_gt_sysfs_get_drvdata(dev, attr->attr.name);
> +	u32 val;
> +	int err;
> +
> +	err = __intel_gt_pcode_read(gt, XEHPSDV_PCODE_FREQUENCY_CONFIG,
> +				    PCODE_MBOX_FC_SC_READ_FUSED_P0,
> +				    PCODE_MBOX_DOMAIN_MEDIAFF, &val);
> +
> +	if (err)
> +		return err;
> +
> +	/* data_out - Fused P0 for domain ID in units of 50 MHz */
> +	val *= GT_FREQUENCY_MULTIPLIER;
> +
> +	return sysfs_emit(buff, "%u\n", val);
> +}
> +
> +static ssize_t media_RPn_freq_mhz_show(struct device *dev,
> +				       struct device_attribute *attr,
> +				       char *buff)
> +{
> +	struct intel_gt *gt = intel_gt_sysfs_get_drvdata(dev, attr->attr.name);
> +	u32 val;
> +	int err;
> +
> +	err = __intel_gt_pcode_read(gt, XEHPSDV_PCODE_FREQUENCY_CONFIG,
> +				    PCODE_MBOX_FC_SC_READ_FUSED_PN,
> +				    PCODE_MBOX_DOMAIN_MEDIAFF, &val);
> +
> +	if (err)
> +		return err;
> +
> +	/* data_out - Fused P0 for domain ID in units of 50 MHz */
> +	val *= GT_FREQUENCY_MULTIPLIER;
> +
> +	return sysfs_emit(buff, "%u\n", val);
> +}
> +
>  static DEVICE_ATTR_RW(media_freq_factor);
>  static struct device_attribute dev_attr_media_freq_factor_scale =
>  	__ATTR(media_freq_factor.scale, 0444, freq_factor_scale_show, NULL);
> +static DEVICE_ATTR_RO(media_RP0_freq_mhz);
> +static DEVICE_ATTR_RO(media_RPn_freq_mhz);
>  
>  static const struct attribute *media_perf_power_attrs[] = {
>  	&dev_attr_media_freq_factor.attr,
>  	&dev_attr_media_freq_factor_scale.attr,
> +	&dev_attr_media_RP0_freq_mhz.attr,
> +	&dev_attr_media_RPn_freq_mhz.attr,
>  	NULL
>  };
>  
> diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
> index 0d5a4ecd374a..a45a776b2dae 100644
> --- a/drivers/gpu/drm/i915/i915_reg.h
> +++ b/drivers/gpu/drm/i915/i915_reg.h
> @@ -6753,6 +6753,21 @@
>  #define     DG1_UNCORE_GET_INIT_STATUS		0x0
>  #define     DG1_UNCORE_INIT_STATUS_COMPLETE	0x1
>  #define GEN12_PCODE_READ_SAGV_BLOCK_TIME_US	0x23
> +#define   XEHPSDV_PCODE_FREQUENCY_CONFIG		0x6e	/* xehpsdv, pvc */
> +/* XEHPSDV_PCODE_FREQUENCY_CONFIG sub-commands (param1) */
> +#define     PCODE_MBOX_FC_SC_READ_FUSED_P0	0x0
> +#define     PCODE_MBOX_FC_SC_READ_FUSED_PN	0x1
> +/* PCODE_MBOX_DOMAIN_* - mailbox domain IDs */
> +/*   XEHPSDV_PCODE_FREQUENCY_CONFIG param2 */
> +#define     PCODE_MBOX_DOMAIN_NONE		0x0
> +#define     PCODE_MBOX_DOMAIN_GT		0x1
> +#define     PCODE_MBOX_DOMAIN_HBM		0x2
> +#define     PCODE_MBOX_DOMAIN_MEDIAFF		0x3
> +#define     PCODE_MBOX_DOMAIN_MEDIA_SAMPLER	0x4
> +#define     PCODE_MBOX_DOMAIN_SYSTOLIC_ARRAY	0x5
> +#define     PCODE_MBOX_DOMAIN_CHIPLET		0x6
> +#define     PCODE_MBOX_DOMAIN_BASE_CHIPLET_LINK	0x7
> +#define     PCODE_MBOX_DOMAIN_BASE		0x8
>  #define GEN6_PCODE_DATA				_MMIO(0x138128)
>  #define   GEN6_PCODE_FREQ_IA_RATIO_SHIFT	8
>  #define   GEN6_PCODE_FREQ_RING_RATIO_SHIFT	16
> -- 
> 2.34.1
>