mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/herbert/cryptodev-2.6.git
synced 2026-04-25 00:52:45 -04:00
3f0e14651a
Let's ensure our PCI device is awaken on every sysfs call. Let's increase the runtime_pm protection and start moving that to the outer bounds. For now, for the files with small number of attr functions, let's only call the runtime pm functions directly. For the hw_engines entries with many files, let's add the sysfs_ops wrapper. Reviewed-by: Matthew Auld <matthew.auld@intel.com> Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20240222163937.138342-5-rodrigo.vivi@intel.com
94 lines
2.2 KiB
C
94 lines
2.2 KiB
C
// SPDX-License-Identifier: MIT
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/*
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* Copyright © 2023 Intel Corporation
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*/
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#include <linux/kobject.h>
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#include <linux/pci.h>
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#include <linux/sysfs.h>
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#include <drm/drm_managed.h>
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#include "xe_device.h"
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#include "xe_device_sysfs.h"
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#include "xe_pm.h"
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/**
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* DOC: Xe device sysfs
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* Xe driver requires exposing certain tunable knobs controlled by user space for
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* each graphics device. Considering this, we need to add sysfs attributes at device
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* level granularity.
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* These sysfs attributes will be available under pci device kobj directory.
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*
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* vram_d3cold_threshold - Report/change vram used threshold(in MB) below
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* which vram save/restore is permissible during runtime D3cold entry/exit.
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*/
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static ssize_t
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vram_d3cold_threshold_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct pci_dev *pdev = to_pci_dev(dev);
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struct xe_device *xe = pdev_to_xe_device(pdev);
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int ret;
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if (!xe)
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return -EINVAL;
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xe_pm_runtime_get(xe);
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ret = sysfs_emit(buf, "%d\n", xe->d3cold.vram_threshold);
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xe_pm_runtime_put(xe);
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return ret;
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}
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static ssize_t
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vram_d3cold_threshold_store(struct device *dev, struct device_attribute *attr,
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const char *buff, size_t count)
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{
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struct pci_dev *pdev = to_pci_dev(dev);
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struct xe_device *xe = pdev_to_xe_device(pdev);
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u32 vram_d3cold_threshold;
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int ret;
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if (!xe)
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return -EINVAL;
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ret = kstrtou32(buff, 0, &vram_d3cold_threshold);
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if (ret)
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return ret;
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drm_dbg(&xe->drm, "vram_d3cold_threshold: %u\n", vram_d3cold_threshold);
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xe_pm_runtime_get(xe);
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ret = xe_pm_set_vram_threshold(xe, vram_d3cold_threshold);
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xe_pm_runtime_put(xe);
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return ret ?: count;
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}
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static DEVICE_ATTR_RW(vram_d3cold_threshold);
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static void xe_device_sysfs_fini(struct drm_device *drm, void *arg)
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{
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struct xe_device *xe = arg;
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sysfs_remove_file(&xe->drm.dev->kobj, &dev_attr_vram_d3cold_threshold.attr);
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}
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void xe_device_sysfs_init(struct xe_device *xe)
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{
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struct device *dev = xe->drm.dev;
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int ret;
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ret = sysfs_create_file(&dev->kobj, &dev_attr_vram_d3cold_threshold.attr);
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if (ret) {
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drm_warn(&xe->drm, "Failed to create sysfs file\n");
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return;
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}
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ret = drmm_add_action_or_reset(&xe->drm, xe_device_sysfs_fini, xe);
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if (ret)
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drm_warn(&xe->drm, "Failed to add sysfs fini drm action\n");
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}
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