Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
110 lines
2.7 KiB
C
110 lines
2.7 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
|
|
/* Copyright (c) 2020-2025, The Linux Foundation. All rights reserved. */
|
|
|
|
#include <drm/drm_file.h>
|
|
#include <drm/drm_managed.h>
|
|
#include <linux/device.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/kobject.h>
|
|
#include <linux/mutex.h>
|
|
#include <linux/sysfs.h>
|
|
|
|
#include "qaic.h"
|
|
|
|
#define NAME_LEN 14
|
|
|
|
struct dbc_attribute {
|
|
struct device_attribute dev_attr;
|
|
u32 dbc_id;
|
|
char name[NAME_LEN];
|
|
};
|
|
|
|
static ssize_t dbc_state_show(struct device *dev, struct device_attribute *a, char *buf)
|
|
{
|
|
struct dbc_attribute *dbc_attr = container_of(a, struct dbc_attribute, dev_attr);
|
|
struct drm_minor *minor = dev_get_drvdata(dev);
|
|
struct qaic_device *qdev;
|
|
|
|
qdev = to_qaic_device(minor->dev);
|
|
return sysfs_emit(buf, "%d\n", qdev->dbc[dbc_attr->dbc_id].state);
|
|
}
|
|
|
|
void set_dbc_state(struct qaic_device *qdev, u32 dbc_id, unsigned int state)
|
|
{
|
|
struct device *kdev = to_accel_kdev(qdev->qddev);
|
|
char *envp[3] = {};
|
|
char state_str[16];
|
|
char id_str[12];
|
|
|
|
envp[0] = id_str;
|
|
envp[1] = state_str;
|
|
|
|
if (state >= DBC_STATE_MAX)
|
|
return;
|
|
if (dbc_id >= qdev->num_dbc)
|
|
return;
|
|
if (state == qdev->dbc[dbc_id].state)
|
|
return;
|
|
|
|
scnprintf(id_str, ARRAY_SIZE(id_str), "DBC_ID=%d", dbc_id);
|
|
scnprintf(state_str, ARRAY_SIZE(state_str), "DBC_STATE=%d", state);
|
|
|
|
qdev->dbc[dbc_id].state = state;
|
|
kobject_uevent_env(&kdev->kobj, KOBJ_CHANGE, envp);
|
|
}
|
|
|
|
int qaic_sysfs_init(struct qaic_drm_device *qddev)
|
|
{
|
|
struct device *kdev = to_accel_kdev(qddev);
|
|
struct drm_device *drm = to_drm(qddev);
|
|
u32 num_dbc = qddev->qdev->num_dbc;
|
|
struct dbc_attribute *dbc_attrs;
|
|
int i, ret;
|
|
|
|
dbc_attrs = drmm_kcalloc(drm, num_dbc, sizeof(*dbc_attrs), GFP_KERNEL);
|
|
if (!dbc_attrs)
|
|
return -ENOMEM;
|
|
|
|
for (i = 0; i < num_dbc; ++i) {
|
|
struct dbc_attribute *dbc_attr = &dbc_attrs[i];
|
|
|
|
sysfs_attr_init(&dbc_attr->dev_attr.attr);
|
|
dbc_attr->dbc_id = i;
|
|
scnprintf(dbc_attr->name, NAME_LEN, "dbc%d_state", i);
|
|
dbc_attr->dev_attr.attr.name = dbc_attr->name;
|
|
dbc_attr->dev_attr.attr.mode = 0444;
|
|
dbc_attr->dev_attr.show = dbc_state_show;
|
|
ret = sysfs_create_file(&kdev->kobj, &dbc_attr->dev_attr.attr);
|
|
if (ret) {
|
|
int j;
|
|
|
|
for (j = 0; j < i; ++j) {
|
|
dbc_attr = &dbc_attrs[j];
|
|
sysfs_remove_file(&kdev->kobj, &dbc_attr->dev_attr.attr);
|
|
}
|
|
drmm_kfree(drm, dbc_attrs);
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
qddev->sysfs_attrs = dbc_attrs;
|
|
return 0;
|
|
}
|
|
|
|
void qaic_sysfs_remove(struct qaic_drm_device *qddev)
|
|
{
|
|
struct dbc_attribute *dbc_attrs = qddev->sysfs_attrs;
|
|
struct device *kdev = to_accel_kdev(qddev);
|
|
u32 num_dbc = qddev->qdev->num_dbc;
|
|
int i;
|
|
|
|
if (!dbc_attrs)
|
|
return;
|
|
|
|
qddev->sysfs_attrs = NULL;
|
|
for (i = 0; i < num_dbc; ++i)
|
|
sysfs_remove_file(&kdev->kobj, &dbc_attrs[i].dev_attr.attr);
|
|
drmm_kfree(to_drm(qddev), dbc_attrs);
|
|
}
|