On Thu, Jan 13, 2022 at 12:20:31AM +0200, Andi Shyti wrote:
> The GT has its own properties and in sysfs they should be grouped
> in the 'gt/' directory.
>
> Create a 'gt/' directory in sysfs which will contain gt0...gtN
> directories related to each tile configured in the GPU. Move the
> power management files inside those directories.
>
> The previous power management files are kept in their original
> root directory to avoid breaking the ABI. They point to the tile
> '0' and a warning message is printed whenever accessed to. The
> deprecated interface needs for the CONFIG_SYSFS_DEPRECATED_V2
> flag in order to be generated.
>
> The new sysfs structure will have a similar layout for the 4 tile
> case:
>
> /sys/.../card0
> ├── gt
> │ ├── gt0
> │ │ ├── id
> │ │ ├── rc6_enable
> │ │ ├── rc6_residency_ms
> │ │ ├── rps_act_freq_mhz
> │ │ ├── rps_boost_freq_mhz
> │ │ ├── rps_cur_freq_mhz
> │ │ ├── rps_max_freq_mhz
> │ │ ├── rps_min_freq_mhz
> │ │ ├── rps_RP0_freq_mhz
> │ │ ├── rps_RP1_freq_mhz
> │ │ └── rps_RPn_freq_mhz
> . .
> . .
> . .
> │ └── gt3
> │ ├── id
> │ ├── rc6_enable
> │ ├── rc6_residency_ms
> │ ├── rps_act_freq_mhz
> │ ├── rps_boost_freq_mhz
> │ ├── rps_cur_freq_mhz
> │ ├── rps_max_freq_mhz
> │ ├── rps_min_freq_mhz
> │ ├── rps_RP0_freq_mhz
> │ ├── rps_RP1_freq_mhz
> │ └── rps_RPn_freq_mhz
> ├── gt_act_freq_mhz -+
> ├── gt_boost_freq_mhz |
> ├── gt_cur_freq_mhz | Original interface
> ├── gt_max_freq_mhz +─-> kept as existing ABI;
> ├── gt_min_freq_mhz | it points to gt0/
> ├── gt_RP0_freq_mhz |
> └── gt_RP1_freq_mhz |
> └── gt_RPn_freq_mhz -+
>
> Signed-off-by: Andi Shyti <andi.shyti@xxxxxxxxxxxxxxx>
> Signed-off-by: Lucas De Marchi <lucas.demarchi@xxxxxxxxx>
> Cc: Matt Roper <matthew.d.roper@xxxxxxxxx>
> Cc: Sujaritha Sundaresan <sujaritha.sundaresan@xxxxxxxxx>
> Cc: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>
Even though this is a pretty natural extension of sysfs entries we
already have in the driver today, it's still technically "new ABI" so I
think we need a link to the IGT changes that exercise it to make sure
it's working as expected.
Likewise we need a link to the real userspace consumer that is expecting
to use this (does some of the Level0 stuff use these knobs?). If this
is one of those really rare cases where we never expect any specific
userspace software to use the ABI, but the intent is instead to let
sysadmins turn the knobs manually with custom shell scripts or whatever,
that would need to be justified in the commit message too.
Matt
> ---
> drivers/gpu/drm/i915/Makefile | 4 +-
> drivers/gpu/drm/i915/gt/intel_gt.c | 2 +
> drivers/gpu/drm/i915/gt/sysfs_gt.c | 126 +++++++++
> drivers/gpu/drm/i915/gt/sysfs_gt.h | 44 +++
> drivers/gpu/drm/i915/gt/sysfs_gt_pm.c | 393 ++++++++++++++++++++++++++
> drivers/gpu/drm/i915/gt/sysfs_gt_pm.h | 16 ++
> drivers/gpu/drm/i915/i915_drv.h | 2 +
> drivers/gpu/drm/i915/i915_reg.h | 1 +
> drivers/gpu/drm/i915/i915_sysfs.c | 315 +--------------------
> drivers/gpu/drm/i915/i915_sysfs.h | 3 +
> 10 files changed, 600 insertions(+), 306 deletions(-)
> create mode 100644 drivers/gpu/drm/i915/gt/sysfs_gt.c
> create mode 100644 drivers/gpu/drm/i915/gt/sysfs_gt.h
> create mode 100644 drivers/gpu/drm/i915/gt/sysfs_gt_pm.c
> create mode 100644 drivers/gpu/drm/i915/gt/sysfs_gt_pm.h
>
> diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile
> index aa86ac33effc..5fd203c626fc 100644
> --- a/drivers/gpu/drm/i915/Makefile
> +++ b/drivers/gpu/drm/i915/Makefile
> @@ -121,7 +121,9 @@ gt-y += \
> gt/intel_timeline.o \
> gt/intel_workarounds.o \
> gt/shmem_utils.o \
> - gt/sysfs_engines.o
> + gt/sysfs_engines.o \
> + gt/sysfs_gt.o \
> + gt/sysfs_gt_pm.o
> # autogenerated null render state
> gt-y += \
> gt/gen6_renderstate.o \
> diff --git a/drivers/gpu/drm/i915/gt/intel_gt.c b/drivers/gpu/drm/i915/gt/intel_gt.c
> index 17927da9e23e..2584c51c1c14 100644
> --- a/drivers/gpu/drm/i915/gt/intel_gt.c
> +++ b/drivers/gpu/drm/i915/gt/intel_gt.c
> @@ -25,6 +25,7 @@
> #include "intel_rps.h"
> #include "intel_uncore.h"
> #include "shmem_utils.h"
> +#include "sysfs_gt.h"
> #include "pxp/intel_pxp.h"
>
> static void
> @@ -453,6 +454,7 @@ void intel_gt_driver_register(struct intel_gt *gt)
> intel_rps_driver_register(>->rps);
>
> intel_gt_debugfs_register(gt);
> + intel_gt_sysfs_register(gt);
> }
>
> static int intel_gt_init_scratch(struct intel_gt *gt, unsigned int size)
> diff --git a/drivers/gpu/drm/i915/gt/sysfs_gt.c b/drivers/gpu/drm/i915/gt/sysfs_gt.c
> new file mode 100644
> index 000000000000..46cf033a53ec
> --- /dev/null
> +++ b/drivers/gpu/drm/i915/gt/sysfs_gt.c
> @@ -0,0 +1,126 @@
> +// SPDX-License-Identifier: MIT
> +/*
> + * Copyright © 2020 Intel Corporation
> + */
> +
> +#include <drm/drm_device.h>
> +#include <linux/device.h>
> +#include <linux/kobject.h>
> +#include <linux/printk.h>
> +#include <linux/sysfs.h>
> +
> +#include "i915_drv.h"
> +#include "i915_sysfs.h"
> +#include "intel_gt.h"
> +#include "intel_gt_types.h"
> +#include "intel_rc6.h"
> +
> +#include "sysfs_gt.h"
> +#include "sysfs_gt_pm.h"
> +
> +struct intel_gt *intel_gt_sysfs_get_drvdata(struct device *dev,
> + const char *name)
> +{
> + struct kobject *kobj = &dev->kobj;
> +
> + /*
> + * We are interested at knowing from where the interface
> + * has been called, whether it's called from gt/ or from
> + * the parent directory.
> + * From the interface position it depends also the value of
> + * the private data.
> + * If the interface is called from gt/ then private data is
> + * of the "struct intel_gt *" type, otherwise it's * a
> + * "struct drm_i915_private *" type.
> + */
> + if (!is_object_gt(kobj)) {
> + struct drm_i915_private *i915 = kdev_minor_to_i915(dev);
> +
> + pr_devel_ratelimited(DEPRECATED
> + "%s (pid %d) is trying to access deprecated %s "
> + "sysfs control, please use gt/gt<n>/%s instead\n",
> + current->comm, task_pid_nr(current), name, name);
> + return to_gt(i915);
> + }
> +
> + return kobj_to_gt(kobj);
> +}
> +
> +static struct kobject *gt_get_parent_obj(struct intel_gt *gt)
> +{
> + return >->i915->drm.primary->kdev->kobj;
> +}
> +
> +static ssize_t id_show(struct device *dev,
> + struct device_attribute *attr,
> + char *buf)
> +{
> + struct intel_gt *gt = intel_gt_sysfs_get_drvdata(dev, attr->attr.name);
> +
> + return sysfs_emit(buf, "%u\n", gt->info.id);
> +}
> +
> +static DEVICE_ATTR_RO(id);
> +
> +static void kobj_gt_release(struct kobject *kobj)
> +{
> + kfree(kobj);
> +}
> +
> +static struct kobj_type kobj_gt_type = {
> + .release = kobj_gt_release,
> + .sysfs_ops = &kobj_sysfs_ops
> +};
> +
> +struct kobject *
> +intel_gt_create_kobj(struct intel_gt *gt, struct kobject *dir, const char *name)
> +{
> + struct kobj_gt *kg;
> +
> + kg = kzalloc(sizeof(*kg), GFP_KERNEL);
> + if (!kg)
> + return NULL;
> +
> + kobject_init(&kg->base, &kobj_gt_type);
> + kg->gt = gt;
> +
> + /* xfer ownership to sysfs tree */
> + if (kobject_add(&kg->base, dir, "%s", name)) {
> + kobject_put(&kg->base);
> + return NULL;
> + }
> +
> + return &kg->base; /* borrowed ref */
> +}
> +
> +void intel_gt_sysfs_register(struct intel_gt *gt)
> +{
> + struct kobject *dir;
> + char name[80];
> +
> + /*
> + * We need to make things right with the
> + * ABI compatibility. The files were originally
> + * generated under the parent directory.
> + *
> + * We generate the files only for gt 0
> + * to avoid duplicates.
> + */
> + if (!gt->info.id)
> + intel_gt_sysfs_pm_init(gt, gt_get_parent_obj(gt));
> +
> + snprintf(name, sizeof(name), "gt%d", gt->info.id);
> +
> + dir = intel_gt_create_kobj(gt, gt->i915->sysfs_gt, name);
> + if (!dir) {
> + drm_err(>->i915->drm,
> + "failed to initialize %s sysfs root\n", name);
> + return;
> + }
> +
> + if (sysfs_create_file(dir, &dev_attr_id.attr))
> + drm_err(>->i915->drm,
> + "failed to create sysfs %s info files\n", name);
> +
> + intel_gt_sysfs_pm_init(gt, dir);
> +}
> diff --git a/drivers/gpu/drm/i915/gt/sysfs_gt.h b/drivers/gpu/drm/i915/gt/sysfs_gt.h
> new file mode 100644
> index 000000000000..cd80a14bb14d
> --- /dev/null
> +++ b/drivers/gpu/drm/i915/gt/sysfs_gt.h
> @@ -0,0 +1,44 @@
> +/* SPDX-License-Identifier: MIT */
> +/*
> + * Copyright © 2020 Intel Corporation
> + */
> +
> +#ifndef __SYSFS_GT_H__
> +#define __SYSFS_GT_H__
> +
> +#include <linux/ctype.h>
> +#include <linux/kobject.h>
> +
> +#include "i915_gem.h" /* GEM_BUG_ON() */
> +
> +struct intel_gt;
> +
> +struct kobj_gt {
> + struct kobject base;
> + struct intel_gt *gt;
> +};
> +
> +static inline bool is_object_gt(struct kobject *kobj)
> +{
> + bool b = !strncmp(kobj->name, "gt", 2);
> +
> + GEM_BUG_ON(b && !isdigit(kobj->name[2]));
> +
> + return b;
> +}
> +
> +struct kobject *
> +intel_gt_create_kobj(struct intel_gt *gt,
> + struct kobject *dir,
> + const char *name);
> +
> +static inline struct intel_gt *kobj_to_gt(struct kobject *kobj)
> +{
> + return container_of(kobj, struct kobj_gt, base)->gt;
> +}
> +
> +void intel_gt_sysfs_register(struct intel_gt *gt);
> +struct intel_gt *intel_gt_sysfs_get_drvdata(struct device *dev,
> + const char *name);
> +
> +#endif /* SYSFS_GT_H */
> diff --git a/drivers/gpu/drm/i915/gt/sysfs_gt_pm.c b/drivers/gpu/drm/i915/gt/sysfs_gt_pm.c
> new file mode 100644
> index 000000000000..6f4424be42d1
> --- /dev/null
> +++ b/drivers/gpu/drm/i915/gt/sysfs_gt_pm.c
> @@ -0,0 +1,393 @@
> +// SPDX-License-Identifier: MIT
> +/*
> + * Copyright © 2020 Intel Corporation
> + */
> +
> +#include <drm/drm_device.h>
> +#include <linux/sysfs.h>
> +#include <linux/printk.h>
> +
> +#include "i915_drv.h"
> +#include "intel_gt.h"
> +#include "intel_rc6.h"
> +#include "intel_rps.h"
> +#include "sysfs_gt.h"
> +#include "sysfs_gt_pm.h"
> +
> +#ifdef CONFIG_PM
> +static u32 get_residency(struct intel_gt *gt, i915_reg_t reg)
> +{
> + intel_wakeref_t wakeref;
> + u64 res = 0;
> +
> + with_intel_runtime_pm(gt->uncore->rpm, wakeref)
> + res = intel_rc6_residency_us(>->rc6, reg);
> +
> + return DIV_ROUND_CLOSEST_ULL(res, 1000);
> +}
> +
> +static ssize_t rc6_enable_show(struct device *dev,
> + struct device_attribute *attr,
> + char *buff)
> +{
> + struct intel_gt *gt = intel_gt_sysfs_get_drvdata(dev, attr->attr.name);
> + u8 mask = 0;
> +
> + if (HAS_RC6(gt->i915))
> + mask |= BIT(0);
> + if (HAS_RC6p(gt->i915))
> + mask |= BIT(1);
> + if (HAS_RC6pp(gt->i915))
> + mask |= BIT(2);
> +
> + return scnprintf(buff, PAGE_SIZE, "%x\n", mask);
> +}
> +
> +static ssize_t rc6_residency_ms_show(struct device *dev,
> + struct device_attribute *attr,
> + char *buff)
> +{
> + struct intel_gt *gt = intel_gt_sysfs_get_drvdata(dev, attr->attr.name);
> + u32 rc6_residency = get_residency(gt, GEN6_GT_GFX_RC6);
> +
> + return scnprintf(buff, PAGE_SIZE, "%u\n", rc6_residency);
> +}
> +
> +static ssize_t rc6p_residency_ms_show(struct device *dev,
> + struct device_attribute *attr,
> + char *buff)
> +{
> + struct intel_gt *gt = intel_gt_sysfs_get_drvdata(dev, attr->attr.name);
> + u32 rc6p_residency = get_residency(gt, GEN6_GT_GFX_RC6p);
> +
> + return scnprintf(buff, PAGE_SIZE, "%u\n", rc6p_residency);
> +}
> +
> +static ssize_t rc6pp_residency_ms_show(struct device *dev,
> + struct device_attribute *attr,
> + char *buff)
> +{
> + struct intel_gt *gt = intel_gt_sysfs_get_drvdata(dev, attr->attr.name);
> + u32 rc6pp_residency = get_residency(gt, GEN6_GT_GFX_RC6pp);
> +
> + return scnprintf(buff, PAGE_SIZE, "%u\n", rc6pp_residency);
> +}
> +
> +static ssize_t media_rc6_residency_ms_show(struct device *dev,
> + struct device_attribute *attr,
> + char *buff)
> +{
> + struct intel_gt *gt = intel_gt_sysfs_get_drvdata(dev, attr->attr.name);
> + u32 rc6_residency = get_residency(gt, VLV_GT_MEDIA_RC6);
> +
> + return scnprintf(buff, PAGE_SIZE, "%u\n", rc6_residency);
> +}
> +
> +static DEVICE_ATTR_RO(rc6_enable);
> +static DEVICE_ATTR_RO(rc6_residency_ms);
> +static DEVICE_ATTR_RO(rc6p_residency_ms);
> +static DEVICE_ATTR_RO(rc6pp_residency_ms);
> +static DEVICE_ATTR_RO(media_rc6_residency_ms);
> +
> +static struct attribute *rc6_attrs[] = {
> + &dev_attr_rc6_enable.attr,
> + &dev_attr_rc6_residency_ms.attr,
> + NULL
> +};
> +
> +static struct attribute *rc6p_attrs[] = {
> + &dev_attr_rc6p_residency_ms.attr,
> + &dev_attr_rc6pp_residency_ms.attr,
> + NULL
> +};
> +
> +static struct attribute *media_rc6_attrs[] = {
> + &dev_attr_media_rc6_residency_ms.attr,
> + NULL
> +};
> +
> +static const struct attribute_group rc6_attr_group[] = {
> + { .name = power_group_name, .attrs = rc6_attrs },
> + { .attrs = rc6_attrs }
> +};
> +
> +static const struct attribute_group rc6p_attr_group[] = {
> + { .name = power_group_name, .attrs = rc6p_attrs },
> + { .attrs = rc6p_attrs }
> +};
> +
> +static const struct attribute_group media_rc6_attr_group[] = {
> + { .name = power_group_name, .attrs = media_rc6_attrs },
> + { .attrs = media_rc6_attrs }
> +};
> +
> +static int __intel_gt_sysfs_create_group(struct kobject *kobj,
> + const struct attribute_group *grp)
> +{
> + int i = is_object_gt(kobj);
> +
> + return i ? sysfs_create_group(kobj, &grp[i]) :
> + sysfs_merge_group(kobj, &grp[i]);
> +}
> +
> +static void intel_sysfs_rc6_init(struct intel_gt *gt, struct kobject *kobj)
> +{
> + int ret;
> +
> + if (!HAS_RC6(gt->i915))
> + return;
> +
> + ret = __intel_gt_sysfs_create_group(kobj, rc6_attr_group);
> + if (ret)
> + drm_err(>->i915->drm,
> + "failed to create gt%u RC6 sysfs files\n", gt->info.id);
> +
> + if (HAS_RC6p(gt->i915)) {
> + ret = __intel_gt_sysfs_create_group(kobj, rc6p_attr_group);
> + if (ret)
> + drm_err(>->i915->drm,
> + "failed to create gt%u RC6p sysfs files\n",
> + gt->info.id);
> + }
> +
> + if (IS_VALLEYVIEW(gt->i915) || IS_CHERRYVIEW(gt->i915)) {
> + ret = __intel_gt_sysfs_create_group(kobj, media_rc6_attr_group);
> + if (ret)
> + drm_err(>->i915->drm,
> + "failed to create media %u RC6 sysfs files\n",
> + gt->info.id);
> + }
> +}
> +#else
> +static void intel_sysfs_rc6_init(struct intel_gt *gt, struct kobject *kobj)
> +{
> +}
> +#endif /* CONFIG_PM */
> +
> +static ssize_t act_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);
> +
> + return scnprintf(buff, PAGE_SIZE, "%d\n",
> + intel_rps_read_actual_frequency(>->rps));
> +}
> +
> +static ssize_t cur_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);
> + struct intel_rps *rps = >->rps;
> +
> + return scnprintf(buff, PAGE_SIZE, "%d\n",
> + intel_rps_get_requested_frequency(rps));
> +}
> +
> +static ssize_t boost_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);
> + struct intel_rps *rps = >->rps;
> +
> + return scnprintf(buff, PAGE_SIZE, "%d\n",
> + intel_rps_get_boost_frequency(rps));
> +}
> +
> +static ssize_t boost_freq_mhz_store(struct device *dev,
> + struct device_attribute *attr,
> + const char *buff, size_t count)
> +{
> + struct intel_gt *gt = intel_gt_sysfs_get_drvdata(dev, attr->attr.name);
> + struct intel_rps *rps = >->rps;
> + bool boost = false;
> + ssize_t ret;
> + u32 val;
> +
> + ret = kstrtou32(buff, 0, &val);
> + if (ret)
> + return ret;
> +
> + /* Validate against (static) hardware limits */
> + val = intel_freq_opcode(rps, val);
> + if (val < rps->min_freq || val > rps->max_freq)
> + return -EINVAL;
> +
> + mutex_lock(&rps->lock);
> + if (val != rps->boost_freq) {
> + rps->boost_freq = val;
> + boost = atomic_read(&rps->num_waiters);
> + }
> + mutex_unlock(&rps->lock);
> + if (boost)
> + schedule_work(&rps->work);
> +
> + return count;
> +}
> +
> +static ssize_t vlv_rpe_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);
> + struct intel_rps *rps = >->rps;
> +
> + return scnprintf(buff, PAGE_SIZE, "%d\n",
> + intel_gpu_freq(rps, rps->efficient_freq));
> +}
> +
> +static ssize_t max_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);
> + struct intel_rps *rps = >->rps;
> +
> + return sysfs_emit(buff, "%d\n", intel_rps_get_max_frequency(rps));
> +}
> +
> +static ssize_t max_freq_mhz_store(struct device *dev,
> + struct device_attribute *attr,
> + const char *buff, size_t count)
> +{
> + struct intel_gt *gt = intel_gt_sysfs_get_drvdata(dev, attr->attr.name);
> + struct intel_rps *rps = >->rps;
> + ssize_t ret;
> + u32 val;
> +
> + ret = kstrtou32(buff, 0, &val);
> + if (ret)
> + return ret;
> +
> + ret = intel_rps_set_max_frequency(rps, val);
> +
> + return ret ?: count;
> +}
> +
> +static ssize_t min_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);
> + struct intel_rps *rps = >->rps;
> +
> + return sysfs_emit(buff, "%d\n", intel_rps_get_min_frequency(rps));
> +}
> +
> +static ssize_t min_freq_mhz_store(struct device *dev,
> + struct device_attribute *attr,
> + const char *buff, size_t count)
> +{
> + struct intel_gt *gt = intel_gt_sysfs_get_drvdata(dev, attr->attr.name);
> + struct intel_rps *rps = >->rps;
> + ssize_t ret;
> + u32 val;
> +
> + ret = kstrtou32(buff, 0, &val);
> + if (ret)
> + return ret;
> +
> + ret = intel_rps_set_min_frequency(rps, val);
> +
> + return ret ?: count;
> +}
> +
> +#define INTEL_GT_RPS_SYSFS_ATTR(_name, _mode, _show, _store) \
> + struct device_attribute dev_attr_gt_##_name = __ATTR(gt_##_name, _mode, _show, _store); \
> + struct device_attribute dev_attr_rps_##_name = __ATTR(rps_##_name, _mode, _show, _store)
> +
> +#define INTEL_GT_RPS_SYSFS_ATTR_RO(_name) \
> + INTEL_GT_RPS_SYSFS_ATTR(_name, 0444, _name##_show, NULL)
> +#define INTEL_GT_RPS_SYSFS_ATTR_RW(_name) \
> + INTEL_GT_RPS_SYSFS_ATTR(_name, 0644, _name##_show, _name##_store)
> +
> +static INTEL_GT_RPS_SYSFS_ATTR_RO(act_freq_mhz);
> +static INTEL_GT_RPS_SYSFS_ATTR_RO(cur_freq_mhz);
> +static INTEL_GT_RPS_SYSFS_ATTR_RW(boost_freq_mhz);
> +static INTEL_GT_RPS_SYSFS_ATTR_RW(max_freq_mhz);
> +static INTEL_GT_RPS_SYSFS_ATTR_RW(min_freq_mhz);
> +
> +static DEVICE_ATTR_RO(vlv_rpe_freq_mhz);
> +
> +static ssize_t rps_rp_mhz_show(struct device *dev,
> + struct device_attribute *attr,
> + char *buff);
> +
> +static INTEL_GT_RPS_SYSFS_ATTR(RP0_freq_mhz, 0444, rps_rp_mhz_show, NULL);
> +static INTEL_GT_RPS_SYSFS_ATTR(RP1_freq_mhz, 0444, rps_rp_mhz_show, NULL);
> +static INTEL_GT_RPS_SYSFS_ATTR(RPn_freq_mhz, 0444, rps_rp_mhz_show, NULL);
> +
> +#define GEN6_ATTR(s) { \
> + &dev_attr_##s##_act_freq_mhz.attr, \
> + &dev_attr_##s##_cur_freq_mhz.attr, \
> + &dev_attr_##s##_boost_freq_mhz.attr, \
> + &dev_attr_##s##_max_freq_mhz.attr, \
> + &dev_attr_##s##_min_freq_mhz.attr, \
> + &dev_attr_##s##_RP0_freq_mhz.attr, \
> + &dev_attr_##s##_RP1_freq_mhz.attr, \
> + &dev_attr_##s##_RPn_freq_mhz.attr, \
> + NULL, \
> + }
> +
> +#define GEN6_RPS_ATTR GEN6_ATTR(rps)
> +#define GEN6_GT_ATTR GEN6_ATTR(gt)
> +
> +/* For now we have a static number of RP states */
> +static ssize_t rps_rp_mhz_show(struct device *dev,
> + struct device_attribute *attr,
> + char *buff)
> +{
> + struct intel_gt *gt = intel_gt_sysfs_get_drvdata(dev, attr->attr.name);
> + struct intel_rps *rps = >->rps;
> + u32 val;
> +
> + if (attr == &dev_attr_gt_RP0_freq_mhz ||
> + attr == &dev_attr_rps_RP0_freq_mhz) {
> + val = intel_rps_get_rp0_frequency(rps);
> + } else if (attr == &dev_attr_gt_RP1_freq_mhz ||
> + attr == &dev_attr_rps_RP1_freq_mhz) {
> + val = intel_rps_get_rp1_frequency(rps);
> + } else if (attr == &dev_attr_gt_RPn_freq_mhz ||
> + attr == &dev_attr_rps_RPn_freq_mhz) {
> + val = intel_rps_get_rpn_frequency(rps);
> + } else {
> + GEM_WARN_ON(1);
> + return -ENODEV;
> + }
> +
> + return scnprintf(buff, PAGE_SIZE, "%d\n", val);
> +}
> +
> +static const struct attribute * const gen6_rps_attrs[] = GEN6_RPS_ATTR;
> +static const struct attribute * const gen6_gt_attrs[] = GEN6_GT_ATTR;
> +
> +static int intel_sysfs_rps_init(struct intel_gt *gt, struct kobject *kobj,
> + const struct attribute * const *attrs)
> +{
> + int ret;
> +
> + if (GRAPHICS_VER(gt->i915) < 6)
> + return 0;
> +
> + ret = sysfs_create_files(kobj, attrs);
> + if (ret)
> + return ret;
> +
> + if (IS_VALLEYVIEW(gt->i915) || IS_CHERRYVIEW(gt->i915))
> + ret = sysfs_create_file(kobj, &dev_attr_vlv_rpe_freq_mhz.attr);
> +
> + return ret;
> +}
> +
> +void intel_gt_sysfs_pm_init(struct intel_gt *gt, struct kobject *kobj)
> +{
> + int ret;
> +
> + intel_sysfs_rc6_init(gt, kobj);
> +
> + ret = is_object_gt(kobj) ?
> + intel_sysfs_rps_init(gt, kobj, gen6_rps_attrs) :
> + intel_sysfs_rps_init(gt, kobj, gen6_gt_attrs);
> + if (ret)
> + drm_err(>->i915->drm,
> + "failed to create gt%u RPS sysfs files", gt->info.id);
> +}
> diff --git a/drivers/gpu/drm/i915/gt/sysfs_gt_pm.h b/drivers/gpu/drm/i915/gt/sysfs_gt_pm.h
> new file mode 100644
> index 000000000000..18c60d929e6d
> --- /dev/null
> +++ b/drivers/gpu/drm/i915/gt/sysfs_gt_pm.h
> @@ -0,0 +1,16 @@
> +/* SPDX-License-Identifier: MIT */
> +/*
> + * Copyright © 2020 Intel Corporation
> + */
> +
> +#ifndef __SYSFS_GT_PM_H__
> +#define __SYSFS_GT_PM_H__
> +
> +#include <linux/kobject.h>
> +
> +#include "intel_gt_types.h"
> +
> +void intel_gt_sysfs_pm_init(struct intel_gt *gt, struct kobject *kobj);
> +void intel_gt_sysfs_pm_remove(struct intel_gt *gt, struct kobject *kobj);
> +
> +#endif /* SYSFS_RC6_H */
> diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
> index 14dbbc5ba9e4..595e2f41ba43 100644
> --- a/drivers/gpu/drm/i915/i915_drv.h
> +++ b/drivers/gpu/drm/i915/i915_drv.h
> @@ -997,6 +997,8 @@ struct drm_i915_private {
> #define I915_MAX_GT 4
> struct intel_gt *gt[I915_MAX_GT];
>
> + struct kobject *sysfs_gt;
> +
> struct {
> struct i915_gem_contexts {
> spinlock_t lock; /* locks list */
> diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
> index 7c4013a0db61..12b2018e2407 100644
> --- a/drivers/gpu/drm/i915/i915_reg.h
> +++ b/drivers/gpu/drm/i915/i915_reg.h
> @@ -8480,6 +8480,7 @@ enum {
> #define GEN6_AGGRESSIVE_TURBO (0 << 15)
> #define GEN9_SW_REQ_UNSLICE_RATIO_SHIFT 23
> #define GEN9_IGNORE_SLICE_RATIO (0 << 0)
> +#define GEN12_SW_REQ_UNSLICE_RATIO_SHIFT 23
>
> #define GEN6_RC_VIDEO_FREQ _MMIO(0xA00C)
> #define GEN6_RC_CONTROL _MMIO(0xA090)
> diff --git a/drivers/gpu/drm/i915/i915_sysfs.c b/drivers/gpu/drm/i915/i915_sysfs.c
> index fae4d1f4f275..d6687e33f29d 100644
> --- a/drivers/gpu/drm/i915/i915_sysfs.c
> +++ b/drivers/gpu/drm/i915/i915_sysfs.c
> @@ -38,113 +38,12 @@
> #include "i915_sysfs.h"
> #include "intel_pm.h"
>
> -static inline struct drm_i915_private *kdev_minor_to_i915(struct device *kdev)
> +struct drm_i915_private *kdev_minor_to_i915(struct device *kdev)
> {
> struct drm_minor *minor = dev_get_drvdata(kdev);
> return to_i915(minor->dev);
> }
>
> -#ifdef CONFIG_PM
> -static u32 calc_residency(struct drm_i915_private *dev_priv,
> - i915_reg_t reg)
> -{
> - intel_wakeref_t wakeref;
> - u64 res = 0;
> -
> - with_intel_runtime_pm(&dev_priv->runtime_pm, wakeref)
> - res = intel_rc6_residency_us(&to_gt(dev_priv)->rc6, reg);
> -
> - return DIV_ROUND_CLOSEST_ULL(res, 1000);
> -}
> -
> -static ssize_t rc6_enable_show(struct device *kdev,
> - struct device_attribute *attr, char *buf)
> -{
> - struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev);
> - unsigned int mask;
> -
> - mask = 0;
> - if (HAS_RC6(dev_priv))
> - mask |= BIT(0);
> - if (HAS_RC6p(dev_priv))
> - mask |= BIT(1);
> - if (HAS_RC6pp(dev_priv))
> - mask |= BIT(2);
> -
> - return sysfs_emit(buf, "%x\n", mask);
> -}
> -
> -static ssize_t rc6_residency_ms_show(struct device *kdev,
> - struct device_attribute *attr, char *buf)
> -{
> - struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev);
> - u32 rc6_residency = calc_residency(dev_priv, GEN6_GT_GFX_RC6);
> - return sysfs_emit(buf, "%u\n", rc6_residency);
> -}
> -
> -static ssize_t rc6p_residency_ms_show(struct device *kdev,
> - struct device_attribute *attr, char *buf)
> -{
> - struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev);
> - u32 rc6p_residency = calc_residency(dev_priv, GEN6_GT_GFX_RC6p);
> - return sysfs_emit(buf, "%u\n", rc6p_residency);
> -}
> -
> -static ssize_t rc6pp_residency_ms_show(struct device *kdev,
> - struct device_attribute *attr, char *buf)
> -{
> - struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev);
> - u32 rc6pp_residency = calc_residency(dev_priv, GEN6_GT_GFX_RC6pp);
> - return sysfs_emit(buf, "%u\n", rc6pp_residency);
> -}
> -
> -static ssize_t media_rc6_residency_ms_show(struct device *kdev,
> - struct device_attribute *attr, char *buf)
> -{
> - struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev);
> - u32 rc6_residency = calc_residency(dev_priv, VLV_GT_MEDIA_RC6);
> - return sysfs_emit(buf, "%u\n", rc6_residency);
> -}
> -
> -static DEVICE_ATTR_RO(rc6_enable);
> -static DEVICE_ATTR_RO(rc6_residency_ms);
> -static DEVICE_ATTR_RO(rc6p_residency_ms);
> -static DEVICE_ATTR_RO(rc6pp_residency_ms);
> -static DEVICE_ATTR_RO(media_rc6_residency_ms);
> -
> -static struct attribute *rc6_attrs[] = {
> - &dev_attr_rc6_enable.attr,
> - &dev_attr_rc6_residency_ms.attr,
> - NULL
> -};
> -
> -static const struct attribute_group rc6_attr_group = {
> - .name = power_group_name,
> - .attrs = rc6_attrs
> -};
> -
> -static struct attribute *rc6p_attrs[] = {
> - &dev_attr_rc6p_residency_ms.attr,
> - &dev_attr_rc6pp_residency_ms.attr,
> - NULL
> -};
> -
> -static const struct attribute_group rc6p_attr_group = {
> - .name = power_group_name,
> - .attrs = rc6p_attrs
> -};
> -
> -static struct attribute *media_rc6_attrs[] = {
> - &dev_attr_media_rc6_residency_ms.attr,
> - NULL
> -};
> -
> -static const struct attribute_group media_rc6_attr_group = {
> - .name = power_group_name,
> - .attrs = media_rc6_attrs
> -};
> -#endif
> -
> static int l3_access_valid(struct drm_i915_private *i915, loff_t offset)
> {
> if (!HAS_L3_DPF(i915))
> @@ -256,171 +155,6 @@ static const struct bin_attribute dpf_attrs_1 = {
> .private = (void *)1
> };
>
> -static ssize_t gt_act_freq_mhz_show(struct device *kdev,
> - struct device_attribute *attr, char *buf)
> -{
> - struct drm_i915_private *i915 = kdev_minor_to_i915(kdev);
> - struct intel_rps *rps = &to_gt(i915)->rps;
> -
> - return sysfs_emit(buf, "%d\n", intel_rps_read_actual_frequency(rps));
> -}
> -
> -static ssize_t gt_cur_freq_mhz_show(struct device *kdev,
> - struct device_attribute *attr, char *buf)
> -{
> - struct drm_i915_private *i915 = kdev_minor_to_i915(kdev);
> - struct intel_rps *rps = &to_gt(i915)->rps;
> -
> - return sysfs_emit(buf, "%d\n", intel_rps_get_requested_frequency(rps));
> -}
> -
> -static ssize_t gt_boost_freq_mhz_show(struct device *kdev, struct device_attribute *attr, char *buf)
> -{
> - struct drm_i915_private *i915 = kdev_minor_to_i915(kdev);
> - struct intel_rps *rps = &to_gt(i915)->rps;
> -
> - return sysfs_emit(buf, "%d\n", intel_rps_get_boost_frequency(rps));
> -}
> -
> -static ssize_t gt_boost_freq_mhz_store(struct device *kdev,
> - struct device_attribute *attr,
> - const char *buf, size_t count)
> -{
> - struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev);
> - struct intel_rps *rps = &to_gt(dev_priv)->rps;
> - ssize_t ret;
> - u32 val;
> -
> - ret = kstrtou32(buf, 0, &val);
> - if (ret)
> - return ret;
> -
> - ret = intel_rps_set_boost_frequency(rps, val);
> -
> - return ret ?: count;
> -}
> -
> -static ssize_t vlv_rpe_freq_mhz_show(struct device *kdev,
> - struct device_attribute *attr, char *buf)
> -{
> - struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev);
> - struct intel_rps *rps = &to_gt(dev_priv)->rps;
> -
> - return sysfs_emit(buf, "%d\n", intel_gpu_freq(rps, rps->efficient_freq));
> -}
> -
> -static ssize_t gt_max_freq_mhz_show(struct device *kdev, struct device_attribute *attr, char *buf)
> -{
> - struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev);
> - struct intel_gt *gt = to_gt(dev_priv);
> - struct intel_rps *rps = >->rps;
> -
> - return sysfs_emit(buf, "%d\n", intel_rps_get_max_frequency(rps));
> -}
> -
> -static ssize_t gt_max_freq_mhz_store(struct device *kdev,
> - struct device_attribute *attr,
> - const char *buf, size_t count)
> -{
> - struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev);
> - struct intel_gt *gt = to_gt(dev_priv);
> - struct intel_rps *rps = >->rps;
> - ssize_t ret;
> - u32 val;
> -
> - ret = kstrtou32(buf, 0, &val);
> - if (ret)
> - return ret;
> -
> - ret = intel_rps_set_max_frequency(rps, val);
> -
> - return ret ?: count;
> -}
> -
> -static ssize_t gt_min_freq_mhz_show(struct device *kdev, struct device_attribute *attr, char *buf)
> -{
> - struct drm_i915_private *i915 = kdev_minor_to_i915(kdev);
> - struct intel_gt *gt = to_gt(i915);
> - struct intel_rps *rps = >->rps;
> -
> - return sysfs_emit(buf, "%d\n", intel_rps_get_min_frequency(rps));
> -}
> -
> -static ssize_t gt_min_freq_mhz_store(struct device *kdev,
> - struct device_attribute *attr,
> - const char *buf, size_t count)
> -{
> - struct drm_i915_private *i915 = kdev_minor_to_i915(kdev);
> - struct intel_rps *rps = &to_gt(i915)->rps;
> - ssize_t ret;
> - u32 val;
> -
> - ret = kstrtou32(buf, 0, &val);
> - if (ret)
> - return ret;
> -
> - ret = intel_rps_set_min_frequency(rps, val);
> -
> - return ret ?: count;
> -}
> -
> -static DEVICE_ATTR_RO(gt_act_freq_mhz);
> -static DEVICE_ATTR_RO(gt_cur_freq_mhz);
> -static DEVICE_ATTR_RW(gt_boost_freq_mhz);
> -static DEVICE_ATTR_RW(gt_max_freq_mhz);
> -static DEVICE_ATTR_RW(gt_min_freq_mhz);
> -
> -static DEVICE_ATTR_RO(vlv_rpe_freq_mhz);
> -
> -static ssize_t gt_rp_mhz_show(struct device *kdev, struct device_attribute *attr, char *buf);
> -static DEVICE_ATTR(gt_RP0_freq_mhz, S_IRUGO, gt_rp_mhz_show, NULL);
> -static DEVICE_ATTR(gt_RP1_freq_mhz, S_IRUGO, gt_rp_mhz_show, NULL);
> -static DEVICE_ATTR(gt_RPn_freq_mhz, S_IRUGO, gt_rp_mhz_show, NULL);
> -
> -/* For now we have a static number of RP states */
> -static ssize_t gt_rp_mhz_show(struct device *kdev, struct device_attribute *attr, char *buf)
> -{
> - struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev);
> - struct intel_rps *rps = &to_gt(dev_priv)->rps;
> - u32 val;
> -
> - if (attr == &dev_attr_gt_RP0_freq_mhz)
> - val = intel_rps_get_rp0_frequency(rps);
> - else if (attr == &dev_attr_gt_RP1_freq_mhz)
> - val = intel_rps_get_rp1_frequency(rps);
> - else if (attr == &dev_attr_gt_RPn_freq_mhz)
> - val = intel_rps_get_rpn_frequency(rps);
> - else
> - BUG();
> -
> - return sysfs_emit(buf, "%d\n", val);
> -}
> -
> -static const struct attribute * const gen6_attrs[] = {
> - &dev_attr_gt_act_freq_mhz.attr,
> - &dev_attr_gt_cur_freq_mhz.attr,
> - &dev_attr_gt_boost_freq_mhz.attr,
> - &dev_attr_gt_max_freq_mhz.attr,
> - &dev_attr_gt_min_freq_mhz.attr,
> - &dev_attr_gt_RP0_freq_mhz.attr,
> - &dev_attr_gt_RP1_freq_mhz.attr,
> - &dev_attr_gt_RPn_freq_mhz.attr,
> - NULL,
> -};
> -
> -static const struct attribute * const vlv_attrs[] = {
> - &dev_attr_gt_act_freq_mhz.attr,
> - &dev_attr_gt_cur_freq_mhz.attr,
> - &dev_attr_gt_boost_freq_mhz.attr,
> - &dev_attr_gt_max_freq_mhz.attr,
> - &dev_attr_gt_min_freq_mhz.attr,
> - &dev_attr_gt_RP0_freq_mhz.attr,
> - &dev_attr_gt_RP1_freq_mhz.attr,
> - &dev_attr_gt_RPn_freq_mhz.attr,
> - &dev_attr_vlv_rpe_freq_mhz.attr,
> - NULL,
> -};
> -
> #if IS_ENABLED(CONFIG_DRM_I915_CAPTURE_ERROR)
>
> static ssize_t error_state_read(struct file *filp, struct kobject *kobj,
> @@ -486,34 +220,16 @@ static void i915_setup_error_capture(struct device *kdev) {}
> static void i915_teardown_error_capture(struct device *kdev) {}
> #endif
>
> +static struct kobject *i915_setup_gt_sysfs(struct kobject *parent)
> +{
> + return kobject_create_and_add("gt", parent);
> +}
> +
> void i915_setup_sysfs(struct drm_i915_private *dev_priv)
> {
> struct device *kdev = dev_priv->drm.primary->kdev;
> int ret;
>
> -#ifdef CONFIG_PM
> - if (HAS_RC6(dev_priv)) {
> - ret = sysfs_merge_group(&kdev->kobj,
> - &rc6_attr_group);
> - if (ret)
> - drm_err(&dev_priv->drm,
> - "RC6 residency sysfs setup failed\n");
> - }
> - if (HAS_RC6p(dev_priv)) {
> - ret = sysfs_merge_group(&kdev->kobj,
> - &rc6p_attr_group);
> - if (ret)
> - drm_err(&dev_priv->drm,
> - "RC6p residency sysfs setup failed\n");
> - }
> - if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
> - ret = sysfs_merge_group(&kdev->kobj,
> - &media_rc6_attr_group);
> - if (ret)
> - drm_err(&dev_priv->drm,
> - "Media RC6 residency sysfs setup failed\n");
> - }
> -#endif
> if (HAS_L3_DPF(dev_priv)) {
> ret = device_create_bin_file(kdev, &dpf_attrs);
> if (ret)
> @@ -529,13 +245,10 @@ void i915_setup_sysfs(struct drm_i915_private *dev_priv)
> }
> }
>
> - ret = 0;
> - if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
> - ret = sysfs_create_files(&kdev->kobj, vlv_attrs);
> - else if (GRAPHICS_VER(dev_priv) >= 6)
> - ret = sysfs_create_files(&kdev->kobj, gen6_attrs);
> - if (ret)
> - drm_err(&dev_priv->drm, "RPS sysfs setup failed\n");
> + dev_priv->sysfs_gt = i915_setup_gt_sysfs(&kdev->kobj);
> + if (!dev_priv->sysfs_gt)
> + drm_err(&dev_priv->drm,
> + "failed to register GT sysfs directory\n");
>
> i915_setup_error_capture(kdev);
>
> @@ -548,14 +261,6 @@ void i915_teardown_sysfs(struct drm_i915_private *dev_priv)
>
> i915_teardown_error_capture(kdev);
>
> - if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
> - sysfs_remove_files(&kdev->kobj, vlv_attrs);
> - else
> - sysfs_remove_files(&kdev->kobj, gen6_attrs);
> device_remove_bin_file(kdev, &dpf_attrs_1);
> device_remove_bin_file(kdev, &dpf_attrs);
> -#ifdef CONFIG_PM
> - sysfs_unmerge_group(&kdev->kobj, &rc6_attr_group);
> - sysfs_unmerge_group(&kdev->kobj, &rc6p_attr_group);
> -#endif
> }
> diff --git a/drivers/gpu/drm/i915/i915_sysfs.h b/drivers/gpu/drm/i915/i915_sysfs.h
> index 41afd4366416..243a17741e3f 100644
> --- a/drivers/gpu/drm/i915/i915_sysfs.h
> +++ b/drivers/gpu/drm/i915/i915_sysfs.h
> @@ -6,8 +6,11 @@
> #ifndef __I915_SYSFS_H__
> #define __I915_SYSFS_H__
>
> +struct device;
> struct drm_i915_private;
>
> +struct drm_i915_private *kdev_minor_to_i915(struct device *kdev);
> +
> void i915_setup_sysfs(struct drm_i915_private *i915);
> void i915_teardown_sysfs(struct drm_i915_private *i915);
>
> --
> 2.34.1
>
--
Matt Roper
Graphics Software Engineer
VTT-OSGC Platform Enablement
Intel Corporation
(916) 356-2795
