[PATCH v10 06/11] remoteproc: mediatek: Probe multi-core SCP
Tinghan Shen
tinghan.shen at mediatek.com
Wed Apr 26 02:12:06 PDT 2023
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 for single-core SCP and multi-core SCP to
the new added 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 at mediatek.com>
---
drivers/remoteproc/mtk_common.h | 3 +
drivers/remoteproc/mtk_scp.c | 188 ++++++++++++++++++++++++++++----
2 files changed, 172 insertions(+), 19 deletions(-)
diff --git a/drivers/remoteproc/mtk_common.h b/drivers/remoteproc/mtk_common.h
index c0905aec3b4b..b73b60c22ea1 100644
--- a/drivers/remoteproc/mtk_common.h
+++ b/drivers/remoteproc/mtk_common.h
@@ -128,6 +128,9 @@ struct mtk_scp {
size_t dram_size;
struct rproc_subdev *rpmsg_subdev;
+
+ struct list_head elem;
+ struct list_head *cluster;
};
/**
diff --git a/drivers/remoteproc/mtk_scp.c b/drivers/remoteproc/mtk_scp.c
index 5e4982f4d5dc..0b052b0acf2e 100644
--- a/drivers/remoteproc/mtk_scp.c
+++ b/drivers/remoteproc/mtk_scp.c
@@ -28,6 +28,7 @@ struct mtk_scp_of_cluster {
void __iomem *l1tcm_base;
size_t l1tcm_size;
phys_addr_t l1tcm_phys;
+ struct list_head mtk_scp_cluster;
};
/**
@@ -862,21 +863,31 @@ static void scp_remove_rpmsg_subdev(struct mtk_scp *scp)
}
}
-static int scp_rproc_init(struct platform_device *pdev)
+static int scp_rproc_init(struct platform_device *cluster_pdev,
+ struct platform_device *core_pdev,
+ const struct mtk_scp_of_data *of_data)
{
- struct device *dev = &pdev->dev;
- struct device_node *np = dev->of_node;
- struct mtk_scp_of_cluster *of_cluster = platform_get_drvdata(pdev);
+ struct platform_device *pdev;
+ struct device *dev;
+ struct device_node *np;
+ struct mtk_scp_of_cluster *of_cluster = platform_get_drvdata(cluster_pdev);
struct mtk_scp *scp;
struct rproc *rproc;
struct resource *res;
const char *fw_name = "scp.img";
int ret, i;
+ if (core_pdev)
+ pdev = core_pdev;
+ else
+ pdev = cluster_pdev;
+
+ dev = &pdev->dev;
ret = rproc_of_parse_firmware(dev, 0, &fw_name);
if (ret < 0 && ret != -EINVAL)
return ret;
+ np = dev->of_node;
rproc = devm_rproc_alloc(dev, np->name, &scp_ops, fw_name, sizeof(*scp));
if (!rproc)
return dev_err_probe(dev, -ENOMEM, "unable to allocate remoteproc\n");
@@ -884,7 +895,7 @@ static int 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_set_drvdata(pdev, scp);
scp->reg_base = of_cluster->reg_base;
@@ -934,10 +945,6 @@ static int scp_rproc_init(struct platform_device *pdev)
goto remove_subdev;
}
- ret = rproc_add(rproc);
- if (ret)
- goto remove_subdev;
-
return 0;
remove_subdev:
@@ -952,6 +959,121 @@ static int scp_rproc_init(struct platform_device *pdev)
return ret;
}
+static void scp_rproc_free(struct mtk_scp *scp)
+{
+ int i;
+
+ scp_remove_rpmsg_subdev(scp);
+ scp_ipi_unregister(scp, SCP_IPI_INIT);
+ scp_unmap_memory_region(scp);
+ for (i = 0; i < SCP_IPI_MAX; i++)
+ mutex_destroy(&scp->ipi_desc[i].lock);
+ mutex_destroy(&scp->send_lock);
+}
+
+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)
+{
+ 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 *of_cluster = platform_get_drvdata(pdev);
+ const struct mtk_scp_of_data **cluster_of_data;
+ struct list_head *cluster = &of_cluster->mtk_scp_cluster;
+ struct mtk_scp *scp, *temp;
+ int core_id = 0;
+ int ret;
+
+ ret = scp_is_single_core(pdev);
+ if (ret < 0)
+ return ret;
+
+ if (ret) {
+ dev_dbg(dev, "single-core scp\n");
+
+ /* When using the SCP node phandle on exported SCP APIs, the drvdata
+ * is expected to be the mtk_scp object, and as a result, it is intended
+ * to be overwritten for single-core SCP usage.
+ */
+ ret = scp_rproc_init(pdev, NULL, of_device_get_match_data(dev));
+ if (ret)
+ return dev_err_probe(dev, ret, "Failed to initialize single-core scp\n");
+
+ scp = platform_get_drvdata(pdev);
+ list_add_tail(&scp->elem, cluster);
+ scp->cluster = cluster;
+ } else {
+ dev_dbg(dev, "multi-core scp\n");
+
+ 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;
+ }
+
+ ret = scp_rproc_init(pdev, cpdev, cluster_of_data[core_id]);
+ if (ret) {
+ dev_err(dev, "Failed to initialize core %d rproc\n", core_id);
+ put_device(&cpdev->dev);
+ of_node_put(child);
+ goto init_fail;
+ }
+ scp = platform_get_drvdata(cpdev);
+ list_add_tail(&scp->elem, cluster);
+ scp->cluster = cluster;
+ put_device(&cpdev->dev);
+
+ core_id++;
+ }
+ }
+
+ list_for_each_entry_safe_reverse(scp, temp, cluster, elem) {
+ ret = rproc_add(scp->rproc);
+ if (ret)
+ goto add_fail;
+ }
+
+ return 0;
+
+add_fail:
+ list_for_each_entry_continue(scp, cluster, elem) {
+ rproc_del(scp->rproc);
+ }
+init_fail:
+ list_for_each_entry_safe_reverse(scp, temp, cluster, elem) {
+ list_del(&scp->elem);
+ scp_rproc_free(scp);
+ }
+
+ return ret;
+}
+
static int scp_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
@@ -983,23 +1105,44 @@ static int scp_probe(struct platform_device *pdev)
of_cluster->l1tcm_phys = res->start;
}
+ INIT_LIST_HEAD(&of_cluster->mtk_scp_cluster);
platform_set_drvdata(pdev, of_cluster);
- return scp_rproc_init(pdev);
+ 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 dev_err_probe(dev, ret, "Failed to initialize scp cluster\n");
+
+ return 0;
}
static int scp_remove(struct platform_device *pdev)
{
- struct mtk_scp *scp = platform_get_drvdata(pdev);
- int i;
+ struct mtk_scp *scp, *temp;
+ struct mtk_scp_of_cluster *of_cluster;
+ struct list_head *cluster;
+ int ret;
- rproc_del(scp->rproc);
- scp_remove_rpmsg_subdev(scp);
- scp_ipi_unregister(scp, SCP_IPI_INIT);
- scp_unmap_memory_region(scp);
- for (i = 0; i < SCP_IPI_MAX; i++)
- mutex_destroy(&scp->ipi_desc[i].lock);
- mutex_destroy(&scp->send_lock);
+ ret = scp_is_single_core(pdev);
+ if (ret < 0)
+ return ret;
+
+ if (ret) {
+ scp = platform_get_drvdata(pdev);
+ cluster = scp->cluster;
+ } else {
+ of_cluster = platform_get_drvdata(pdev);
+ cluster = &of_cluster->mtk_scp_cluster;
+ }
+
+ list_for_each_entry_safe_reverse(scp, temp, cluster, elem) {
+ list_del(&scp->elem);
+ rproc_del(scp->rproc);
+ scp_rproc_free(scp);
+ }
return 0;
}
@@ -1078,12 +1221,19 @@ 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
More information about the linux-arm-kernel
mailing list