67804e48b4
When trying to analyse bug reports from CI, customers, etc. it can be difficult to work out exactly what is happening on which GT in a multi-GT system. So add GT oriented debug/error message wrappers. If used instead of the drm_ equivalents, you get the same output but with a GT# prefix on it. v2: Go back to using lower case names (combined review feedback). Convert intel_gt.c as a first step. v3: Add gt_err_ratelimited() as well, undo one conversation that might not have a GT pointer in some scenarios (review feedback from Michal W). Split definitions into separate header (review feedback from Jani). Convert all intel_gt*.c files. v4: Re-order some macro definitions (Andi S), update (c) date (Tvrtko) Signed-off-by: John Harrison <John.C.Harrison@Intel.com> Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20230111200429.2139084-2-John.C.Harrison@Intel.com
117 lines
2.7 KiB
C
117 lines
2.7 KiB
C
// SPDX-License-Identifier: MIT
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/*
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* Copyright © 2022 Intel Corporation
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*/
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#include <drm/drm_device.h>
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#include <linux/device.h>
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#include <linux/kobject.h>
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#include <linux/printk.h>
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#include <linux/sysfs.h>
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#include "i915_drv.h"
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#include "i915_sysfs.h"
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#include "intel_gt.h"
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#include "intel_gt_print.h"
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#include "intel_gt_sysfs.h"
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#include "intel_gt_sysfs_pm.h"
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#include "intel_gt_types.h"
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#include "intel_rc6.h"
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bool is_object_gt(struct kobject *kobj)
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{
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return !strncmp(kobj->name, "gt", 2);
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}
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struct intel_gt *intel_gt_sysfs_get_drvdata(struct kobject *kobj,
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const char *name)
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{
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/*
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* We are interested at knowing from where the interface
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* has been called, whether it's called from gt/ or from
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* the parent directory.
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* From the interface position it depends also the value of
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* the private data.
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* If the interface is called from gt/ then private data is
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* of the "struct intel_gt *" type, otherwise it's * a
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* "struct drm_i915_private *" type.
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*/
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if (!is_object_gt(kobj)) {
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struct device *dev = kobj_to_dev(kobj);
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struct drm_i915_private *i915 = kdev_minor_to_i915(dev);
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return to_gt(i915);
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}
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return kobj_to_gt(kobj);
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}
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static struct kobject *gt_get_parent_obj(struct intel_gt *gt)
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{
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return >->i915->drm.primary->kdev->kobj;
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}
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static ssize_t id_show(struct kobject *kobj,
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struct kobj_attribute *attr,
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char *buf)
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{
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struct intel_gt *gt = intel_gt_sysfs_get_drvdata(kobj, attr->attr.name);
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return sysfs_emit(buf, "%u\n", gt->info.id);
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}
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static struct kobj_attribute attr_id = __ATTR_RO(id);
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static struct attribute *id_attrs[] = {
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&attr_id.attr,
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NULL,
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};
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ATTRIBUTE_GROUPS(id);
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/* A kobject needs a release() method even if it does nothing */
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static void kobj_gt_release(struct kobject *kobj)
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{
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}
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static struct kobj_type kobj_gt_type = {
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.release = kobj_gt_release,
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.sysfs_ops = &kobj_sysfs_ops,
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.default_groups = id_groups,
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};
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void intel_gt_sysfs_register(struct intel_gt *gt)
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{
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/*
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* We need to make things right with the
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* ABI compatibility. The files were originally
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* generated under the parent directory.
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*
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* We generate the files only for gt 0
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* to avoid duplicates.
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*/
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if (gt_is_root(gt))
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intel_gt_sysfs_pm_init(gt, gt_get_parent_obj(gt));
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/* init and xfer ownership to sysfs tree */
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if (kobject_init_and_add(>->sysfs_gt, &kobj_gt_type,
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gt->i915->sysfs_gt, "gt%d", gt->info.id))
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goto exit_fail;
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gt->sysfs_defaults = kobject_create_and_add(".defaults", >->sysfs_gt);
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if (!gt->sysfs_defaults)
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goto exit_fail;
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intel_gt_sysfs_pm_init(gt, >->sysfs_gt);
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return;
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exit_fail:
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kobject_put(>->sysfs_gt);
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gt_warn(gt, "failed to initialize sysfs root\n");
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}
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void intel_gt_sysfs_unregister(struct intel_gt *gt)
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{
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kobject_put(gt->sysfs_defaults);
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kobject_put(>->sysfs_gt);
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}
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