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// SPDX-License-Identifier: GPL-2.0
/*
* DSP usage stats
*
* Copyright (C) 2022 Google LLC
*/
#include "gxp-usage-stats.h"
void gxp_usage_stats_process_buffer(struct gxp_dev *gxp, void *buf)
{
struct gxp_usage_header *header = buf;
struct gxp_usage_metric *metric =
(struct gxp_usage_metric *)(header + 1);
int i;
dev_dbg(gxp->dev, "%s: n=%u sz=%u", __func__, header->num_metrics,
header->metric_size);
if (header->metric_size != sizeof(struct gxp_usage_metric)) {
dev_dbg(gxp->dev, "%s: expected sz=%zu, discard", __func__,
sizeof(struct gxp_usage_metric));
return;
}
for (i = 0; i < header->num_metrics; i++) {
switch (metric->type) {
/* TODO(b/237967242): Handle metrics according to their types. */
default:
dev_dbg(gxp->dev, "%s: %d: skip unknown type=%u",
__func__, i, metric->type);
break;
}
metric++;
}
}
/*
* TODO(b/237967242): Implement device attributes and add them to the `usage_stats_dev_attrs`
* below.
*/
static struct attribute *usage_stats_dev_attrs[] = {
NULL,
};
static const struct attribute_group usage_stats_attr_group = {
.attrs = usage_stats_dev_attrs,
};
void gxp_usage_stats_init(struct gxp_dev *gxp)
{
struct gxp_usage_stats *ustats;
int ret;
ustats = devm_kzalloc(gxp->dev, sizeof(*gxp->usage_stats), GFP_KERNEL);
if (!ustats) {
dev_warn(gxp->dev,
"failed to allocate memory for usage stats\n");
return;
}
/*
* TODO(b/237967242): Add initialization codes of member variables of `ustats` if needed
* after the metrics are decided and implemented.
*/
mutex_init(&ustats->usage_stats_lock);
gxp->usage_stats = ustats;
ret = device_add_group(gxp->dev, &usage_stats_attr_group);
if (ret)
dev_warn(gxp->dev, "failed to create the usage_stats attrs\n");
dev_dbg(gxp->dev, "%s init\n", __func__);
}
void gxp_usage_stats_exit(struct gxp_dev *gxp)
{
struct gxp_usage_stats *ustats = gxp->usage_stats;
if (ustats) {
/*
* TODO(b/237967242): Add releasing codes of member variables of `ustats` if needed
* after the metrics are decided and implemented.
*/
device_remove_group(gxp->dev, &usage_stats_attr_group);
}
dev_dbg(gxp->dev, "%s exit\n", __func__);
}
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