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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2020, The Linux Foundation. All rights reserved.
*/
#include <linux/interconnect.h>
#include <linux/interconnect-provider.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/slab.h>
#include "bcm-voter.h"
#include "icc-rpmh.h"
/**
* qcom_icc_pre_aggregate - cleans up stale values from prior icc_set
* @node: icc node to operate on
*/
void qcom_icc_pre_aggregate(struct icc_node *node)
{
size_t i;
struct qcom_icc_node *qn;
struct qcom_icc_provider *qp;
qn = node->data;
qp = to_qcom_provider(node->provider);
for (i = 0; i < QCOM_ICC_NUM_BUCKETS; i++) {
qn->sum_avg[i] = 0;
qn->max_peak[i] = 0;
}
for (i = 0; i < qn->num_bcms; i++)
qcom_icc_bcm_voter_add(qp->voter, qn->bcms[i]);
}
EXPORT_SYMBOL_GPL(qcom_icc_pre_aggregate);
/**
* qcom_icc_aggregate - aggregate bw for buckets indicated by tag
* @node: node to aggregate
* @tag: tag to indicate which buckets to aggregate
* @avg_bw: new bw to sum aggregate
* @peak_bw: new bw to max aggregate
* @agg_avg: existing aggregate avg bw val
* @agg_peak: existing aggregate peak bw val
*/
int qcom_icc_aggregate(struct icc_node *node, u32 tag, u32 avg_bw,
u32 peak_bw, u32 *agg_avg, u32 *agg_peak)
{
size_t i;
struct qcom_icc_node *qn;
qn = node->data;
if (!tag)
tag = QCOM_ICC_TAG_ALWAYS;
for (i = 0; i < QCOM_ICC_NUM_BUCKETS; i++) {
if (tag & BIT(i)) {
qn->sum_avg[i] += avg_bw;
qn->max_peak[i] = max_t(u32, qn->max_peak[i], peak_bw);
}
if (node->init_avg || node->init_peak) {
qn->sum_avg[i] = max_t(u64, qn->sum_avg[i], node->init_avg);
qn->max_peak[i] = max_t(u64, qn->max_peak[i], node->init_peak);
}
}
*agg_avg += avg_bw;
*agg_peak = max_t(u32, *agg_peak, peak_bw);
return 0;
}
EXPORT_SYMBOL_GPL(qcom_icc_aggregate);
/**
* qcom_icc_set - set the constraints based on path
* @src: source node for the path to set constraints on
* @dst: destination node for the path to set constraints on
*
* Return: 0 on success, or an error code otherwise
*/
int qcom_icc_set(struct icc_node *src, struct icc_node *dst)
{
struct qcom_icc_provider *qp;
struct icc_node *node;
if (!src)
node = dst;
else
node = src;
qp = to_qcom_provider(node->provider);
qcom_icc_bcm_voter_commit(qp->voter);
return 0;
}
EXPORT_SYMBOL_GPL(qcom_icc_set);
struct icc_node_data *qcom_icc_xlate_extended(struct of_phandle_args *spec, void *data)
{
struct icc_node_data *ndata;
struct icc_node *node;
node = of_icc_xlate_onecell(spec, data);
if (IS_ERR(node))
return ERR_CAST(node);
ndata = kzalloc(sizeof(*ndata), GFP_KERNEL);
if (!ndata)
return ERR_PTR(-ENOMEM);
ndata->node = node;
if (spec->args_count == 2)
ndata->tag = spec->args[1];
if (spec->args_count > 2)
pr_warn("%pOF: Too many arguments, path tag is not parsed\n", spec->np);
return ndata;
}
EXPORT_SYMBOL_GPL(qcom_icc_xlate_extended);
/**
* qcom_icc_bcm_init - populates bcm aux data and connect qnodes
* @bcm: bcm to be initialized
* @dev: associated provider device
*
* Return: 0 on success, or an error code otherwise
*/
int qcom_icc_bcm_init(struct qcom_icc_bcm *bcm, struct device *dev)
{
struct qcom_icc_node *qn;
const struct bcm_db *data;
size_t data_count;
int i;
/* BCM is already initialised*/
if (bcm->addr)
return 0;
bcm->addr = cmd_db_read_addr(bcm->name);
if (!bcm->addr) {
dev_err(dev, "%s could not find RPMh address\n",
bcm->name);
return -EINVAL;
}
data = cmd_db_read_aux_data(bcm->name, &data_count);
if (IS_ERR(data)) {
dev_err(dev, "%s command db read error (%ld)\n",
bcm->name, PTR_ERR(data));
return PTR_ERR(data);
}
if (!data_count) {
dev_err(dev, "%s command db missing or partial aux data\n",
bcm->name);
return -EINVAL;
}
bcm->aux_data.unit = le32_to_cpu(data->unit);
bcm->aux_data.width = le16_to_cpu(data->width);
bcm->aux_data.vcd = data->vcd;
bcm->aux_data.reserved = data->reserved;
INIT_LIST_HEAD(&bcm->list);
INIT_LIST_HEAD(&bcm->ws_list);
if (!bcm->vote_scale)
bcm->vote_scale = 1000;
/* Link Qnodes to their respective BCMs */
for (i = 0; i < bcm->num_nodes; i++) {
qn = bcm->nodes[i];
qn->bcms[qn->num_bcms] = bcm;
qn->num_bcms++;
}
return 0;
}
EXPORT_SYMBOL_GPL(qcom_icc_bcm_init);
MODULE_LICENSE("GPL v2");
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