EPSS on SA8775P has two instances which requires creation of two device
nodes with different compatible and device data because of unique
icc node id and name limitation in interconnect framework.
Add multidevice support to osm-l3 code to get unique node id from IDA
and node name is made unique by appending node address.
Signed-off-by: Raviteja Laggyshetty <quic_rlaggysh@xxxxxxxxxxx>
---
drivers/interconnect/qcom/osm-l3.c | 85 ++++++++++++++++++++++--------
1 file changed, 63 insertions(+), 22 deletions(-)
diff --git a/drivers/interconnect/qcom/osm-l3.c b/drivers/interconnect/qcom/osm-l3.c
index 6a656ed44d49..a9405b7d251b 100644
--- a/drivers/interconnect/qcom/osm-l3.c
+++ b/drivers/interconnect/qcom/osm-l3.c
@@ -1,16 +1,19 @@
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2020-2021, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2024 Qualcomm Innovation Center, Inc. All rights reserved.
*/
#include <linux/args.h>
#include <linux/bitfield.h>
#include <linux/clk.h>
+#include <linux/idr.h>
#include <linux/interconnect-provider.h>
#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of.h>
+#include <linux/of_address.h>
#include <linux/platform_device.h>
#include <dt-bindings/interconnect/qcom,osm-l3.h>
@@ -34,9 +37,14 @@
#define OSM_L3_MAX_LINKS 1
+#define OSM_L3_NODE_ID_START 10000
+#define OSM_NODE_NAME_SUFFIX_SIZE 10
+
#define to_osm_l3_provider(_provider) \
container_of(_provider, struct qcom_osm_l3_icc_provider, provider)
+static DEFINE_IDA(osm_l3_id);
+
struct qcom_osm_l3_icc_provider {
void __iomem *base;
unsigned int max_state;
@@ -55,46 +63,40 @@ struct qcom_osm_l3_icc_provider {
*/
struct qcom_osm_l3_node {
const char *name;
- u16 links[OSM_L3_MAX_LINKS];
+ const char *links[OSM_L3_MAX_LINKS];
u16 id;
u16 num_links;
u16 buswidth;
};
struct qcom_osm_l3_desc {
- const struct qcom_osm_l3_node * const *nodes;
+ struct qcom_osm_l3_node * const *nodes;
size_t num_nodes;
unsigned int lut_row_size;
unsigned int reg_freq_lut;
unsigned int reg_perf_state;
};
-enum {
- OSM_L3_MASTER_NODE = 10000,
- OSM_L3_SLAVE_NODE,
-};
-
-#define DEFINE_QNODE(_name, _id, _buswidth, ...) \
- static const struct qcom_osm_l3_node _name = { \
+#define DEFINE_QNODE(_name, _buswidth, ...) \
+ static struct qcom_osm_l3_node _name = { \
.name = #_name, \
- .id = _id, \
.buswidth = _buswidth, \
.num_links = COUNT_ARGS(__VA_ARGS__), \
- .links = { __VA_ARGS__ }, \
+ __VA_OPT__(.links = { #__VA_ARGS__ }) \
}
-DEFINE_QNODE(osm_l3_master, OSM_L3_MASTER_NODE, 16, OSM_L3_SLAVE_NODE);
-DEFINE_QNODE(osm_l3_slave, OSM_L3_SLAVE_NODE, 16);
+DEFINE_QNODE(osm_l3_master, 16, osm_l3_slave);
+DEFINE_QNODE(osm_l3_slave, 16);
-static const struct qcom_osm_l3_node * const osm_l3_nodes[] = {
+static struct qcom_osm_l3_node * const osm_l3_nodes[] = {
[MASTER_OSM_L3_APPS] = &osm_l3_master,
[SLAVE_OSM_L3] = &osm_l3_slave,
};
-DEFINE_QNODE(epss_l3_master, OSM_L3_MASTER_NODE, 32, OSM_L3_SLAVE_NODE);
-DEFINE_QNODE(epss_l3_slave, OSM_L3_SLAVE_NODE, 32);
+DEFINE_QNODE(epss_l3_master, 32, epss_l3_slave);
+DEFINE_QNODE(epss_l3_slave, 32);
-static const struct qcom_osm_l3_node * const epss_l3_nodes[] = {
+static struct qcom_osm_l3_node * const epss_l3_nodes[] = {
[MASTER_EPSS_L3_APPS] = &epss_l3_master,
[SLAVE_EPSS_L3_SHARED] = &epss_l3_slave,
};
@@ -123,6 +125,19 @@ static const struct qcom_osm_l3_desc epss_l3_l3_vote = {
.reg_perf_state = EPSS_REG_L3_VOTE,
};
+static u16 get_node_id_by_name(const char *node_name,
+ const struct qcom_osm_l3_desc *desc)
+{
+ struct qcom_osm_l3_node *const *nodes = desc->nodes;
+ int i;
+
+ for (i = 0; i < desc->num_nodes; i++) {
+ if (!strcmp(nodes[i]->name, node_name))
+ return nodes[i]->id;
+ }
+ return 0;
+}
+
static int qcom_osm_l3_set(struct icc_node *src, struct icc_node *dst)
{
struct qcom_osm_l3_icc_provider *qp;
@@ -164,10 +179,11 @@ static int qcom_osm_l3_probe(struct platform_device *pdev)
const struct qcom_osm_l3_desc *desc;
struct icc_onecell_data *data;
struct icc_provider *provider;
- const struct qcom_osm_l3_node * const *qnodes;
+ struct qcom_osm_l3_node * const *qnodes;
struct icc_node *node;
size_t num_nodes;
struct clk *clk;
+ u64 addr;
int ret;
clk = clk_get(&pdev->dev, "xo");
@@ -188,6 +204,10 @@ static int qcom_osm_l3_probe(struct platform_device *pdev)
if (!qp)
return -ENOMEM;
+ ret = of_property_read_reg(pdev->dev.of_node, 0, &addr, NULL);
+ if (ret)
+ return ret;
+
qp->base = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(qp->base))
return PTR_ERR(qp->base);
@@ -242,8 +262,13 @@ static int qcom_osm_l3_probe(struct platform_device *pdev)
icc_provider_init(provider);
+ /* Allocate unique id for qnodes */
+ for (i = 0; i < num_nodes; i++)
+ qnodes[i]->id = ida_alloc_min(&osm_l3_id, OSM_L3_NODE_ID_START, GFP_KERNEL);
+
for (i = 0; i < num_nodes; i++) {
- size_t j;
+ char *node_name;
+ size_t j, len;
node = icc_node_create(qnodes[i]->id);
if (IS_ERR(node)) {
@@ -251,13 +276,29 @@ static int qcom_osm_l3_probe(struct platform_device *pdev)
goto err;
}
- node->name = qnodes[i]->name;
+ /* len = strlen(node->name) + @ + 8 (base-address) + NULL */
+ len = strlen(qnodes[i]->name) + OSM_NODE_NAME_SUFFIX_SIZE;
+ node_name = devm_kzalloc(&pdev->dev, len, GFP_KERNEL);
+ if (!node_name) {
+ ret = -ENOMEM;
+ goto err;
+ }
+
+ snprintf(node_name, len, "%s@%08llx", qnodes[i]->name, addr);
+ node->name = node_name;
+
/* Cast away const and add it back in qcom_osm_l3_set() */
node->data = (void *)qnodes[i];
icc_node_add(node, provider);
- for (j = 0; j < qnodes[i]->num_links; j++)
- icc_link_create(node, qnodes[i]->links[j]);
+ for (j = 0; j < qnodes[i]->num_links; j++) {
+ u16 link_node_id = get_node_id_by_name(qnodes[i]->links[j], desc);
+
+ if (link_node_id)
+ icc_link_create(node, link_node_id);
+ else
+ goto err;
+ }
data->nodes[i] = node;
}
--
2.39.2
