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Message-ID: <20230517043449.26352-7-tinghan.shen@mediatek.com>
Date: Wed, 17 May 2023 12:34:44 +0800
From: Tinghan Shen <tinghan.shen@...iatek.com>
To: Bjorn Andersson <andersson@...nel.org>,
Mathieu Poirier <mathieu.poirier@...aro.org>,
Rob Herring <robh+dt@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
Conor Dooley <conor+dt@...nel.org>,
Matthias Brugger <matthias.bgg@...il.com>,
AngeloGioacchino Del Regno
<angelogioacchino.delregno@...labora.com>,
Tinghan Shen <tinghan.shen@...iatek.com>
CC: <linux-remoteproc@...r.kernel.org>, <devicetree@...r.kernel.org>,
<linux-kernel@...r.kernel.org>,
<linux-arm-kernel@...ts.infradead.org>,
<linux-mediatek@...ts.infradead.org>,
<Project_Global_Chrome_Upstream_Group@...iatek.com>
Subject: [PATCH v12 06/11] remoteproc: mediatek: Probe multi-core SCP
The difference of single-core SCP and multi-core SCP device tree is
the presence of child device nodes described SCP cores. The SCP
driver populates the platform device and checks the child nodes
to identify whether it's a single-core SCP or a multi-core SCP.
Add the remoteproc instances of multi-core SCP to the SCP cluster list.
When the SCP driver is removed, it cleanup resources by walking
through the cluster list.
Signed-off-by: Tinghan Shen <tinghan.shen@...iatek.com>
---
drivers/remoteproc/mtk_scp.c | 115 +++++++++++++++++++++++++++++++++--
1 file changed, 111 insertions(+), 4 deletions(-)
diff --git a/drivers/remoteproc/mtk_scp.c b/drivers/remoteproc/mtk_scp.c
index c8fc6b46f82b..d644e232dfec 100644
--- a/drivers/remoteproc/mtk_scp.c
+++ b/drivers/remoteproc/mtk_scp.c
@@ -864,7 +864,8 @@ static void scp_remove_rpmsg_subdev(struct mtk_scp *scp)
}
static struct mtk_scp *scp_rproc_init(struct platform_device *pdev,
- struct mtk_scp_of_cluster *scp_cluster)
+ struct mtk_scp_of_cluster *scp_cluster,
+ const struct mtk_scp_of_data *of_data)
{
struct device *dev = &pdev->dev;
struct device_node *np = dev->of_node;
@@ -887,7 +888,7 @@ static struct mtk_scp *scp_rproc_init(struct platform_device *pdev,
scp = rproc->priv;
scp->rproc = rproc;
scp->dev = dev;
- scp->data = of_device_get_match_data(dev);
+ scp->data = of_data;
platform_device_add_data(pdev, &scp, sizeof(scp));
scp->reg_base = scp_cluster->reg_base;
@@ -964,14 +965,15 @@ static void scp_free(struct mtk_scp *scp)
mutex_destroy(&scp->send_lock);
}
-static int scp_cluster_init(struct platform_device *pdev)
+static int scp_add_single_core(struct platform_device *pdev)
{
+ struct device *dev = &pdev->dev;
struct mtk_scp_of_cluster *scp_cluster = platform_get_drvdata(pdev);
struct list_head *cluster = &scp_cluster->mtk_scp_list;
struct mtk_scp *scp;
int ret;
- scp = scp_rproc_init(pdev, scp_cluster);
+ scp = scp_rproc_init(pdev, scp_cluster, of_device_get_match_data(dev));
if (IS_ERR(scp))
return PTR_ERR(scp);
@@ -987,6 +989,100 @@ static int scp_cluster_init(struct platform_device *pdev)
return 0;
}
+static int scp_add_multi_core(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct device_node *np = dev_of_node(dev);
+ struct platform_device *cpdev;
+ struct device_node *child;
+ struct mtk_scp_of_cluster *scp_cluster = platform_get_drvdata(pdev);
+ struct list_head *cluster = &scp_cluster->mtk_scp_list;
+ const struct mtk_scp_of_data **cluster_of_data;
+ struct mtk_scp *scp, *temp;
+ int core_id = 0;
+ int ret;
+
+ cluster_of_data = (const struct mtk_scp_of_data **)of_device_get_match_data(dev);
+
+ for_each_available_child_of_node(np, child) {
+ if (!cluster_of_data[core_id]) {
+ ret = -EINVAL;
+ dev_err(dev, "Not support core %d\n", core_id);
+ of_node_put(child);
+ goto init_fail;
+ }
+
+ cpdev = of_find_device_by_node(child);
+ if (!cpdev) {
+ ret = -ENODEV;
+ dev_err(dev, "Not found platform device for core %d\n", core_id);
+ of_node_put(child);
+ goto init_fail;
+ }
+
+ scp = scp_rproc_init(cpdev, scp_cluster, cluster_of_data[core_id]);
+ put_device(&cpdev->dev);
+ if (IS_ERR(scp)) {
+ ret = PTR_ERR(scp);
+ dev_err(dev, "Failed to initialize core %d rproc\n", core_id);
+ of_node_put(child);
+ goto init_fail;
+ }
+
+ ret = rproc_add(scp->rproc);
+ if (ret) {
+ dev_err(dev, "Failed to add rproc of core %d\n", core_id);
+ of_node_put(child);
+ scp_free(scp);
+ goto init_fail;
+ }
+
+ list_add_tail(&scp->elem, cluster);
+ core_id++;
+ }
+
+ return 0;
+
+init_fail:
+ list_for_each_entry_safe_reverse(scp, temp, cluster, elem) {
+ list_del(&scp->elem);
+ rproc_del(scp->rproc);
+ scp_free(scp);
+ }
+
+ return ret;
+}
+
+static int scp_is_single_core(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct device_node *np = dev_of_node(dev);
+ struct device_node *child;
+
+ child = of_get_next_available_child(np, NULL);
+ if (!child)
+ return dev_err_probe(dev, -ENODEV, "No child node\n");
+
+ of_node_put(child);
+ return of_node_name_eq(child, "cros-ec-rpmsg");
+}
+
+static int scp_cluster_init(struct platform_device *pdev)
+{
+ int ret;
+
+ ret = scp_is_single_core(pdev);
+ if (ret < 0)
+ return ret;
+
+ if (ret)
+ ret = scp_add_single_core(pdev);
+ else
+ ret = scp_add_multi_core(pdev);
+
+ return ret;
+}
+
static int scp_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
@@ -1021,6 +1117,10 @@ static int scp_probe(struct platform_device *pdev)
INIT_LIST_HEAD(&scp_cluster->mtk_scp_list);
platform_set_drvdata(pdev, scp_cluster);
+ ret = devm_of_platform_populate(dev);
+ if (ret)
+ return dev_err_probe(dev, ret, "Failed to populate platform devices\n");
+
ret = scp_cluster_init(pdev);
if (ret)
return ret;
@@ -1114,12 +1214,19 @@ static const struct mtk_scp_of_data mt8195_of_data_c1 = {
.host_to_scp_int_bit = MT8195_CORE1_HOST_IPC_INT_BIT,
};
+static const struct mtk_scp_of_data *mt8195_of_data_cores[] = {
+ &mt8195_of_data,
+ &mt8195_of_data_c1,
+ NULL
+};
+
static const struct of_device_id mtk_scp_of_match[] = {
{ .compatible = "mediatek,mt8183-scp", .data = &mt8183_of_data },
{ .compatible = "mediatek,mt8186-scp", .data = &mt8186_of_data },
{ .compatible = "mediatek,mt8188-scp", .data = &mt8188_of_data },
{ .compatible = "mediatek,mt8192-scp", .data = &mt8192_of_data },
{ .compatible = "mediatek,mt8195-scp", .data = &mt8195_of_data },
+ { .compatible = "mediatek,mt8195-scp-dual", .data = &mt8195_of_data_cores },
{},
};
MODULE_DEVICE_TABLE(of, mtk_scp_of_match);
--
2.18.0
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