drivers/interconnect/qcom/icc-rpmh.c - SHIFTPHONES/mainline/linux - Gitiles

 // 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/of_device.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);

 int qcom_icc_rpmh_probe(struct platform_device *pdev)
 {
 	const struct qcom_icc_desc *desc;
 	struct device *dev = &pdev->dev;
 	struct icc_onecell_data *data;
 	struct icc_provider *provider;
 	struct qcom_icc_node **qnodes, *qn;
 	struct qcom_icc_provider *qp;
 	struct icc_node *node;
 	size_t num_nodes, i, j;
 	int ret;

 	desc = of_device_get_match_data(dev);
 	if (!desc)
 		return -EINVAL;

 	qnodes = desc->nodes;
 	num_nodes = desc->num_nodes;

 	qp = devm_kzalloc(dev, sizeof(*qp), GFP_KERNEL);
 	if (!qp)
 		return -ENOMEM;

 	data = devm_kzalloc(dev, struct_size(data, nodes, num_nodes), GFP_KERNEL);
 	if (!data)
 		return -ENOMEM;

 	provider = &qp->provider;
 	provider->dev = dev;
 	provider->set = qcom_icc_set;
 	provider->pre_aggregate = qcom_icc_pre_aggregate;
 	provider->aggregate = qcom_icc_aggregate;
 	provider->xlate_extended = qcom_icc_xlate_extended;
 	INIT_LIST_HEAD(&provider->nodes);
 	provider->data = data;

 	qp->dev = dev;
 	qp->bcms = desc->bcms;
 	qp->num_bcms = desc->num_bcms;

 	qp->voter = of_bcm_voter_get(qp->dev, NULL);
 	if (IS_ERR(qp->voter))
 		return PTR_ERR(qp->voter);

 	ret = icc_provider_add(provider);
 	if (ret)
 		return ret;

 	for (i = 0; i < qp->num_bcms; i++)
 		qcom_icc_bcm_init(qp->bcms[i], dev);

 	for (i = 0; i < num_nodes; i++) {
 		qn = qnodes[i];
 		if (!qn)
 			continue;

 		node = icc_node_create(qn->id);
 		if (IS_ERR(node)) {
 			ret = PTR_ERR(node);
 			goto err;
 		}

 		node->name = qn->name;
 		node->data = qn;
 		icc_node_add(node, provider);

 		for (j = 0; j < qn->num_links; j++)
 			icc_link_create(node, qn->links[j]);

 		data->nodes[i] = node;
 	}

 	data->num_nodes = num_nodes;
 	platform_set_drvdata(pdev, qp);

 	return 0;
 err:
 	icc_nodes_remove(provider);
 	icc_provider_del(provider);
 	return ret;
 }
 EXPORT_SYMBOL_GPL(qcom_icc_rpmh_probe);

 int qcom_icc_rpmh_remove(struct platform_device *pdev)
 {
 	struct qcom_icc_provider *qp = platform_get_drvdata(pdev);

 	icc_nodes_remove(&qp->provider);
 	return icc_provider_del(&qp->provider);
 }
 EXPORT_SYMBOL_GPL(qcom_icc_rpmh_remove);

 MODULE_LICENSE("GPL v2");
	// 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/of_device.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);

	int qcom_icc_rpmh_probe(struct platform_device *pdev)
	{
	const struct qcom_icc_desc *desc;
	struct device *dev = &pdev->dev;
	struct icc_onecell_data *data;
	struct icc_provider *provider;
	struct qcom_icc_node *qnodes, qn;
	struct qcom_icc_provider *qp;
	struct icc_node *node;
	size_t num_nodes, i, j;
	int ret;

	desc = of_device_get_match_data(dev);
	if (!desc)
	return -EINVAL;

	qnodes = desc->nodes;
	num_nodes = desc->num_nodes;

	qp = devm_kzalloc(dev, sizeof(*qp), GFP_KERNEL);
	if (!qp)
	return -ENOMEM;

	data = devm_kzalloc(dev, struct_size(data, nodes, num_nodes), GFP_KERNEL);
	if (!data)
	return -ENOMEM;

	provider = &qp->provider;
	provider->dev = dev;
	provider->set = qcom_icc_set;
	provider->pre_aggregate = qcom_icc_pre_aggregate;
	provider->aggregate = qcom_icc_aggregate;
	provider->xlate_extended = qcom_icc_xlate_extended;
	INIT_LIST_HEAD(&provider->nodes);
	provider->data = data;

	qp->dev = dev;
	qp->bcms = desc->bcms;
	qp->num_bcms = desc->num_bcms;

	qp->voter = of_bcm_voter_get(qp->dev, NULL);
	if (IS_ERR(qp->voter))
	return PTR_ERR(qp->voter);

	ret = icc_provider_add(provider);
	if (ret)
	return ret;

	for (i = 0; i < qp->num_bcms; i++)
	qcom_icc_bcm_init(qp->bcms[i], dev);

	for (i = 0; i < num_nodes; i++) {
	qn = qnodes[i];
	if (!qn)
	continue;

	node = icc_node_create(qn->id);
	if (IS_ERR(node)) {
	ret = PTR_ERR(node);
	goto err;
	}

	node->name = qn->name;
	node->data = qn;
	icc_node_add(node, provider);

	for (j = 0; j < qn->num_links; j++)
	icc_link_create(node, qn->links[j]);

	data->nodes[i] = node;
	}

	data->num_nodes = num_nodes;
	platform_set_drvdata(pdev, qp);

	return 0;
	err:
	icc_nodes_remove(provider);
	icc_provider_del(provider);
	return ret;
	}
	EXPORT_SYMBOL_GPL(qcom_icc_rpmh_probe);

	int qcom_icc_rpmh_remove(struct platform_device *pdev)
	{
	struct qcom_icc_provider *qp = platform_get_drvdata(pdev);

	icc_nodes_remove(&qp->provider);
	return icc_provider_del(&qp->provider);
	}
	EXPORT_SYMBOL_GPL(qcom_icc_rpmh_remove);

	MODULE_LICENSE("GPL v2");