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authorGeorgi Djakov <georgi.djakov@linaro.org>2020-09-03 16:31:28 +0300
committerGeorgi Djakov <georgi.djakov@linaro.org>2020-09-08 16:28:58 +0300
commit1521e22bfa12db6225002ba3b040572a78dff996 (patch)
treee4230c7ea71ab725e913bac74e315dc25a63877d /drivers/interconnect
parentcb30e0292db258a681f3e2334ebfb337c8863482 (diff)
downloadlinux-1521e22bfa12db6225002ba3b040572a78dff996.tar.xz
interconnect: Introduce xlate_extended() callback
Currently there is the xlate() callback, which is used by providers for mapping the nodes from phandle arguments. That's fine for simple mappings, but the phandle arguments could contain an additional data, such as tag information. Let's create another callback xlate_extended() for the cases where providers want also populate the path tag data. Tested-by: Sibi Sankar <sibis@codeaurora.org> Reviewed-by: Sibi Sankar <sibis@codeaurora.org> Reviewed-by: Matthias Kaehlcke <mka@chromium.org> Tested-by: Matthias Kaehlcke <mka@chromium.org> Link: https://lore.kernel.org/r/20200903133134.17201-2-georgi.djakov@linaro.org Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org>
Diffstat (limited to 'drivers/interconnect')
-rw-r--r--drivers/interconnect/core.c73
1 files changed, 50 insertions, 23 deletions
diff --git a/drivers/interconnect/core.c b/drivers/interconnect/core.c
index cf07491b7415..7642f3601dbf 100644
--- a/drivers/interconnect/core.c
+++ b/drivers/interconnect/core.c
@@ -342,12 +342,13 @@ EXPORT_SYMBOL_GPL(of_icc_xlate_onecell);
* Looks for interconnect provider under the node specified by @spec and if
* found, uses xlate function of the provider to map phandle args to node.
*
- * Returns a valid pointer to struct icc_node on success or ERR_PTR()
+ * Returns a valid pointer to struct icc_node_data on success or ERR_PTR()
* on failure.
*/
-struct icc_node *of_icc_get_from_provider(struct of_phandle_args *spec)
+struct icc_node_data *of_icc_get_from_provider(struct of_phandle_args *spec)
{
struct icc_node *node = ERR_PTR(-EPROBE_DEFER);
+ struct icc_node_data *data = NULL;
struct icc_provider *provider;
if (!spec)
@@ -355,14 +356,33 @@ struct icc_node *of_icc_get_from_provider(struct of_phandle_args *spec)
mutex_lock(&icc_lock);
list_for_each_entry(provider, &icc_providers, provider_list) {
- if (provider->dev->of_node == spec->np)
- node = provider->xlate(spec, provider->data);
- if (!IS_ERR(node))
- break;
+ if (provider->dev->of_node == spec->np) {
+ if (provider->xlate_extended) {
+ data = provider->xlate_extended(spec, provider->data);
+ if (!IS_ERR(data)) {
+ node = data->node;
+ break;
+ }
+ } else {
+ node = provider->xlate(spec, provider->data);
+ if (!IS_ERR(node))
+ break;
+ }
+ }
}
mutex_unlock(&icc_lock);
- return node;
+ if (IS_ERR(node))
+ return ERR_CAST(node);
+
+ if (!data) {
+ data = kzalloc(sizeof(*data), GFP_KERNEL);
+ if (!data)
+ return ERR_PTR(-ENOMEM);
+ data->node = node;
+ }
+
+ return data;
}
EXPORT_SYMBOL_GPL(of_icc_get_from_provider);
@@ -409,7 +429,7 @@ EXPORT_SYMBOL_GPL(devm_of_icc_get);
struct icc_path *of_icc_get_by_index(struct device *dev, int idx)
{
struct icc_path *path;
- struct icc_node *src_node, *dst_node;
+ struct icc_node_data *src_data, *dst_data;
struct device_node *np;
struct of_phandle_args src_args, dst_args;
int ret;
@@ -447,39 +467,46 @@ struct icc_path *of_icc_get_by_index(struct device *dev, int idx)
of_node_put(dst_args.np);
- src_node = of_icc_get_from_provider(&src_args);
+ src_data = of_icc_get_from_provider(&src_args);
- if (IS_ERR(src_node)) {
- if (PTR_ERR(src_node) != -EPROBE_DEFER)
+ if (IS_ERR(src_data)) {
+ if (PTR_ERR(src_data) != -EPROBE_DEFER)
dev_err(dev, "error finding src node: %ld\n",
- PTR_ERR(src_node));
- return ERR_CAST(src_node);
+ PTR_ERR(src_data));
+ return ERR_CAST(src_data);
}
- dst_node = of_icc_get_from_provider(&dst_args);
+ dst_data = of_icc_get_from_provider(&dst_args);
- if (IS_ERR(dst_node)) {
- if (PTR_ERR(dst_node) != -EPROBE_DEFER)
+ if (IS_ERR(dst_data)) {
+ if (PTR_ERR(dst_data) != -EPROBE_DEFER)
dev_err(dev, "error finding dst node: %ld\n",
- PTR_ERR(dst_node));
- return ERR_CAST(dst_node);
+ PTR_ERR(dst_data));
+ kfree(src_data);
+ return ERR_CAST(dst_data);
}
mutex_lock(&icc_lock);
- path = path_find(dev, src_node, dst_node);
+ path = path_find(dev, src_data->node, dst_data->node);
mutex_unlock(&icc_lock);
if (IS_ERR(path)) {
dev_err(dev, "%s: invalid path=%ld\n", __func__, PTR_ERR(path));
- return path;
+ goto free_icc_data;
}
+ if (src_data->tag && src_data->tag == dst_data->tag)
+ icc_set_tag(path, src_data->tag);
+
path->name = kasprintf(GFP_KERNEL, "%s-%s",
- src_node->name, dst_node->name);
+ src_data->node->name, dst_data->node->name);
if (!path->name) {
kfree(path);
- return ERR_PTR(-ENOMEM);
+ path = ERR_PTR(-ENOMEM);
}
+free_icc_data:
+ kfree(src_data);
+ kfree(dst_data);
return path;
}
EXPORT_SYMBOL_GPL(of_icc_get_by_index);
@@ -981,7 +1008,7 @@ int icc_provider_add(struct icc_provider *provider)
{
if (WARN_ON(!provider->set))
return -EINVAL;
- if (WARN_ON(!provider->xlate))
+ if (WARN_ON(!provider->xlate && !provider->xlate_extended))
return -EINVAL;
mutex_lock(&icc_lock);