Message-Id: <20200930081645.3434-3-jun.nie@linaro.org>
Date:   Wed, 30 Sep 2020 16:16:42 +0800
From:   Jun Nie <jun.nie@...aro.org>
To:     devicetree@...r.kernel.org, georgi.djakov@...aro.org,
        bjorn.andersson@...aro.org, agross@...nel.org,
        linux-pm@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        linux-kernel@...r.kernel.org, robh@...nel.org
Cc:     shawn.guo@...aro.org, Jun Nie <jun.nie@...aro.org>
Subject: [PATCH 2/5] interconnect: qcom: qcs404: use shared code

Use shared code for aggregate functionalities and probe function
to remove duplicated code.

Signed-off-by: Jun Nie <jun.nie@...aro.org>
---
 drivers/interconnect/qcom/qcs404.c | 242 +----------------------------
 1 file changed, 8 insertions(+), 234 deletions(-)

diff --git a/drivers/interconnect/qcom/qcs404.c b/drivers/interconnect/qcom/qcs404.c
index d4769a5ea182..03e9ae030cc4 100644
--- a/drivers/interconnect/qcom/qcs404.c
+++ b/drivers/interconnect/qcom/qcs404.c
@@ -9,15 +9,12 @@
 #include <linux/interconnect-provider.h>
 #include <linux/io.h>
 #include <linux/module.h>
-#include <linux/of_device.h>
-#include <linux/of_platform.h>
 #include <linux/platform_device.h>
-#include <linux/slab.h>
+#include <linux/of_device.h>
 
-#include "smd-rpm.h"
 
-#define RPM_BUS_MASTER_REQ	0x73616d62
-#define RPM_BUS_SLAVE_REQ	0x766c7362
+#include "smd-rpm.h"
+#include "icc-rpm.h"
 
 enum {
 	QCS404_MASTER_AMPSS_M0 = 1,
@@ -95,67 +92,11 @@ enum {
 	QCS404_SLAVE_LPASS,
 };
 
-#define to_qcom_provider(_provider) \
-	container_of(_provider, struct qcom_icc_provider, provider)
-
-static const struct clk_bulk_data bus_clocks[] = {
+static const struct clk_bulk_data qcs404_bus_clocks[] = {
 	{ .id = "bus" },
 	{ .id = "bus_a" },
 };
 
-/**
- * struct qcom_icc_provider - Qualcomm specific interconnect provider
- * @provider: generic interconnect provider
- * @bus_clks: the clk_bulk_data table of bus clocks
- * @num_clks: the total number of clk_bulk_data entries
- */
-struct qcom_icc_provider {
-	struct icc_provider provider;
-	struct clk_bulk_data *bus_clks;
-	int num_clks;
-};
-
-#define QCS404_MAX_LINKS	12
-
-/**
- * struct qcom_icc_node - Qualcomm specific interconnect nodes
- * @name: the node name used in debugfs
- * @id: a unique node identifier
- * @links: an array of nodes where we can go next while traversing
- * @num_links: the total number of @links
- * @buswidth: width of the interconnect between a node and the bus (bytes)
- * @mas_rpm_id:	RPM id for devices that are bus masters
- * @slv_rpm_id:	RPM id for devices that are bus slaves
- * @rate: current bus clock rate in Hz
- */
-struct qcom_icc_node {
-	unsigned char *name;
-	u16 id;
-	u16 links[QCS404_MAX_LINKS];
-	u16 num_links;
-	u16 buswidth;
-	int mas_rpm_id;
-	int slv_rpm_id;
-	u64 rate;
-};
-
-struct qcom_icc_desc {
-	struct qcom_icc_node **nodes;
-	size_t num_nodes;
-};
-
-#define DEFINE_QNODE(_name, _id, _buswidth, _mas_rpm_id, _slv_rpm_id,	\
-		     ...)						\
-		static struct qcom_icc_node _name = {			\
-		.name = #_name,						\
-		.id = _id,						\
-		.buswidth = _buswidth,					\
-		.mas_rpm_id = _mas_rpm_id,				\
-		.slv_rpm_id = _slv_rpm_id,				\
-		.num_links = ARRAY_SIZE(((int[]){ __VA_ARGS__ })),	\
-		.links = { __VA_ARGS__ },				\
-	}
-
 DEFINE_QNODE(mas_apps_proc, QCS404_MASTER_AMPSS_M0, 8, 0, -1, QCS404_SLAVE_EBI_CH0, QCS404_BIMC_SNOC_SLV);
 DEFINE_QNODE(mas_oxili, QCS404_MASTER_GRAPHICS_3D, 8, 6, -1, QCS404_SLAVE_EBI_CH0, QCS404_BIMC_SNOC_SLV);
 DEFINE_QNODE(mas_mdp, QCS404_MASTER_MDP_PORT0, 8, 8, -1, QCS404_SLAVE_EBI_CH0, QCS404_BIMC_SNOC_SLV);
@@ -327,178 +268,11 @@ static struct qcom_icc_desc qcs404_snoc = {
 	.num_nodes = ARRAY_SIZE(qcs404_snoc_nodes),
 };
 
-static int qcom_icc_set(struct icc_node *src, struct icc_node *dst)
-{
-	struct qcom_icc_provider *qp;
-	struct qcom_icc_node *qn;
-	struct icc_provider *provider;
-	struct icc_node *n;
-	u64 sum_bw;
-	u64 max_peak_bw;
-	u64 rate;
-	u32 agg_avg = 0;
-	u32 agg_peak = 0;
-	int ret, i;
-
-	qn = src->data;
-	provider = src->provider;
-	qp = to_qcom_provider(provider);
-
-	list_for_each_entry(n, &provider->nodes, node_list)
-		provider->aggregate(n, 0, n->avg_bw, n->peak_bw,
-				    &agg_avg, &agg_peak);
-
-	sum_bw = icc_units_to_bps(agg_avg);
-	max_peak_bw = icc_units_to_bps(agg_peak);
-
-	/* send bandwidth request message to the RPM processor */
-	if (qn->mas_rpm_id != -1) {
-		ret = qcom_icc_rpm_smd_send(QCOM_SMD_RPM_ACTIVE_STATE,
-					    RPM_BUS_MASTER_REQ,
-					    qn->mas_rpm_id,
-					    sum_bw);
-		if (ret) {
-			pr_err("qcom_icc_rpm_smd_send mas %d error %d\n",
-			       qn->mas_rpm_id, ret);
-			return ret;
-		}
-	}
-
-	if (qn->slv_rpm_id != -1) {
-		ret = qcom_icc_rpm_smd_send(QCOM_SMD_RPM_ACTIVE_STATE,
-					    RPM_BUS_SLAVE_REQ,
-					    qn->slv_rpm_id,
-					    sum_bw);
-		if (ret) {
-			pr_err("qcom_icc_rpm_smd_send slv error %d\n",
-			       ret);
-			return ret;
-		}
-	}
-
-	rate = max(sum_bw, max_peak_bw);
-
-	do_div(rate, qn->buswidth);
-
-	if (qn->rate == rate)
-		return 0;
-
-	for (i = 0; i < qp->num_clks; i++) {
-		ret = clk_set_rate(qp->bus_clks[i].clk, rate);
-		if (ret) {
-			pr_err("%s clk_set_rate error: %d\n",
-			       qp->bus_clks[i].id, ret);
-			return ret;
-		}
-	}
-
-	qn->rate = rate;
 
-	return 0;
-}
-
-static int qnoc_probe(struct platform_device *pdev)
+static int qcs404_qnoc_probe(struct platform_device *pdev)
 {
-	struct device *dev = &pdev->dev;
-	const struct qcom_icc_desc *desc;
-	struct icc_onecell_data *data;
-	struct icc_provider *provider;
-	struct qcom_icc_node **qnodes;
-	struct qcom_icc_provider *qp;
-	struct icc_node *node;
-	size_t num_nodes, i;
-	int ret;
-
-	/* wait for the RPM proxy */
-	if (!qcom_icc_rpm_smd_available())
-		return -EPROBE_DEFER;
-
-	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;
-
-	qp->bus_clks = devm_kmemdup(dev, bus_clocks, sizeof(bus_clocks),
-				    GFP_KERNEL);
-	if (!qp->bus_clks)
-		return -ENOMEM;
-
-	qp->num_clks = ARRAY_SIZE(bus_clocks);
-	ret = devm_clk_bulk_get(dev, qp->num_clks, qp->bus_clks);
-	if (ret)
-		return ret;
-
-	ret = clk_bulk_prepare_enable(qp->num_clks, qp->bus_clks);
-	if (ret)
-		return ret;
-
-	provider = &qp->provider;
-	INIT_LIST_HEAD(&provider->nodes);
-	provider->dev = dev;
-	provider->set = qcom_icc_set;
-	provider->aggregate = icc_std_aggregate;
-	provider->xlate = of_icc_xlate_onecell;
-	provider->data = data;
-
-	ret = icc_provider_add(provider);
-	if (ret) {
-		dev_err(dev, "error adding interconnect provider: %d\n", ret);
-		clk_bulk_disable_unprepare(qp->num_clks, qp->bus_clks);
-		return ret;
-	}
-
-	for (i = 0; i < num_nodes; i++) {
-		size_t j;
-
-		node = icc_node_create(qnodes[i]->id);
-		if (IS_ERR(node)) {
-			ret = PTR_ERR(node);
-			goto err;
-		}
-
-		node->name = qnodes[i]->name;
-		node->data = qnodes[i];
-		icc_node_add(node, provider);
-
-		dev_dbg(dev, "registered node %s\n", node->name);
-
-		/* populate links */
-		for (j = 0; j < qnodes[i]->num_links; j++)
-			icc_link_create(node, qnodes[i]->links[j]);
-
-		data->nodes[i] = node;
-	}
-	data->num_nodes = num_nodes;
-
-	platform_set_drvdata(pdev, qp);
-
-	return 0;
-err:
-	icc_nodes_remove(provider);
-	clk_bulk_disable_unprepare(qp->num_clks, qp->bus_clks);
-	icc_provider_del(provider);
-
-	return ret;
-}
-
-static int qnoc_remove(struct platform_device *pdev)
-{
-	struct qcom_icc_provider *qp = platform_get_drvdata(pdev);
-
-	icc_nodes_remove(&qp->provider);
-	clk_bulk_disable_unprepare(qp->num_clks, qp->bus_clks);
-	return icc_provider_del(&qp->provider);
+	return qnoc_probe(pdev, sizeof(qcs404_bus_clocks),
+			  ARRAY_SIZE(qcs404_bus_clocks), qcs404_bus_clocks);
 }
 
 static const struct of_device_id qcs404_noc_of_match[] = {
@@ -510,7 +284,7 @@ static const struct of_device_id qcs404_noc_of_match[] = {
 MODULE_DEVICE_TABLE(of, qcs404_noc_of_match);
 
 static struct platform_driver qcs404_noc_driver = {
-	.probe = qnoc_probe,
+	.probe = qcs404_qnoc_probe,
 	.remove = qnoc_remove,
 	.driver = {
 		.name = "qnoc-qcs404",
-- 
2.17.1

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