diff options
Diffstat (limited to 'drivers/gpu/drm/i915/gt')
| -rw-r--r-- | drivers/gpu/drm/i915/gt/intel_gt.c | 2 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/gt/sysfs_gt.c | 126 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/gt/sysfs_gt.h | 44 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/gt/sysfs_gt_pm.c | 394 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/gt/sysfs_gt_pm.h | 16 |
5 files changed, 582 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/gt/intel_gt.c b/drivers/gpu/drm/i915/gt/intel_gt.c index 0cfd20faa3db..a5c42731a258 100644 --- a/drivers/gpu/drm/i915/gt/intel_gt.c +++ b/drivers/gpu/drm/i915/gt/intel_gt.c @@ -24,6 +24,7 @@ #include "intel_rps.h" #include "intel_uncore.h" #include "shmem_utils.h" +#include "sysfs_gt.h" #include "pxp/intel_pxp.h" static void @@ -458,6 +459,7 @@ 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..efb84fcde28c --- /dev/null +++ b/drivers/gpu/drm/i915/gt/sysfs_gt_pm.c @@ -0,0 +1,394 @@ +// 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 */ |