Current interconnect framework is based on static IDs for creating node
and registering with framework. This becomes a limitation for topologies
where there are multiple instances of same interconnect provider. Add
icc_node_create_alloc_id() API to create icc node with dynamic id, this
will help to overcome the dependency on static IDs.
Signed-off-by: Raviteja Laggyshetty <quic_rlaggysh@xxxxxxxxxxx>
---
drivers/interconnect/core.c | 32 +++++++++++++++++++++++++++
include/linux/interconnect-provider.h | 6 +++++
2 files changed, 38 insertions(+)
diff --git a/drivers/interconnect/core.c b/drivers/interconnect/core.c
index 9d5404a07e8a..0b7093eb51af 100644
--- a/drivers/interconnect/core.c
+++ b/drivers/interconnect/core.c
@@ -858,6 +858,38 @@ struct icc_node *icc_node_create(int id)
}
EXPORT_SYMBOL_GPL(icc_node_create);
+/**
+ * icc_node_create_alloc_id() - create node and dynamically allocate id
+ * @start_id: min id to be allocated
+ *
+ * Return: icc_node pointer on success, or ERR_PTR() on error
+ */
+struct icc_node *icc_node_create_alloc_id(int start_id)
+{
+ struct icc_node *node;
+ int id;
+
+ mutex_lock(&icc_lock);
+
+ node = kzalloc(sizeof(*node), GFP_KERNEL);
+ if (!node)
+ return ERR_PTR(-ENOMEM);
+
+ id = idr_alloc(&icc_idr, node, start_id, 0, GFP_KERNEL);
+ if (id < 0) {
+ WARN(1, "%s: couldn't get idr\n", __func__);
+ kfree(node);
+ node = ERR_PTR(id);
+ goto out;
+ }
+ node->id = id;
+out:
+ mutex_unlock(&icc_lock);
+
+ return node;
+}
+EXPORT_SYMBOL_GPL(icc_node_create_alloc_id);
+
/**
* icc_node_destroy() - destroy a node
* @id: node id
diff --git a/include/linux/interconnect-provider.h b/include/linux/interconnect-provider.h
index f5aef8784692..4fc7a5884374 100644
--- a/include/linux/interconnect-provider.h
+++ b/include/linux/interconnect-provider.h
@@ -117,6 +117,7 @@ struct icc_node {
int icc_std_aggregate(struct icc_node *node, u32 tag, u32 avg_bw,
u32 peak_bw, u32 *agg_avg, u32 *agg_peak);
struct icc_node *icc_node_create(int id);
+struct icc_node *icc_node_create_alloc_id(int start_id);
void icc_node_destroy(int id);
int icc_link_create(struct icc_node *node, const int dst_id);
void icc_node_add(struct icc_node *node, struct icc_provider *provider);
@@ -141,6 +142,11 @@ static inline struct icc_node *icc_node_create(int id)
return ERR_PTR(-ENOTSUPP);
}
+static inline struct icc_node *icc_node_create_alloc_id(int start_id)
+{
+ return ERR_PTR(-EOPNOTSUPP);
+}
+
static inline void icc_node_destroy(int id)
{
}
--
2.39.2
