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Message-Id: <20221222185049.737625-4-cristian.marussi@arm.com>
Date: Thu, 22 Dec 2022 18:50:43 +0000
From: Cristian Marussi <cristian.marussi@....com>
To: linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Cc: sudeep.holla@....com, james.quinlan@...adcom.com,
f.fainelli@...il.com, etienne.carriere@...aro.org,
vincent.guittot@...aro.org, Ludvig.Parsson@...s.com,
cristian.marussi@....com
Subject: [PATCH 3/9] firmware: arm_scmi: Move protocol registration helpers
Move protocol registration helpers and logic out of bus.c compilation
unit into driver.c.
No functional change.
Signed-off-by: Cristian Marussi <cristian.marussi@....com>
---
drivers/firmware/arm_scmi/bus.c | 68 ------------------------------
drivers/firmware/arm_scmi/common.h | 3 --
drivers/firmware/arm_scmi/driver.c | 67 +++++++++++++++++++++++++++++
3 files changed, 67 insertions(+), 71 deletions(-)
diff --git a/drivers/firmware/arm_scmi/bus.c b/drivers/firmware/arm_scmi/bus.c
index 35bb70724d44..089957f5fb9b 100644
--- a/drivers/firmware/arm_scmi/bus.c
+++ b/drivers/firmware/arm_scmi/bus.c
@@ -16,8 +16,6 @@
#include "common.h"
static DEFINE_IDA(scmi_bus_id);
-static DEFINE_IDR(scmi_protocols);
-static DEFINE_SPINLOCK(protocol_lock);
static const struct scmi_device_id *
scmi_dev_match_id(struct scmi_device *scmi_dev, struct scmi_driver *scmi_drv)
@@ -76,30 +74,6 @@ struct scmi_device *scmi_child_dev_find(struct device *parent,
return to_scmi_dev(dev);
}
-const struct scmi_protocol *scmi_protocol_get(int protocol_id)
-{
- const struct scmi_protocol *proto;
-
- proto = idr_find(&scmi_protocols, protocol_id);
- if (!proto || !try_module_get(proto->owner)) {
- pr_warn("SCMI Protocol 0x%x not found!\n", protocol_id);
- return NULL;
- }
-
- pr_debug("Found SCMI Protocol 0x%x\n", protocol_id);
-
- return proto;
-}
-
-void scmi_protocol_put(int protocol_id)
-{
- const struct scmi_protocol *proto;
-
- proto = idr_find(&scmi_protocols, protocol_id);
- if (proto)
- module_put(proto->owner);
-}
-
static int scmi_dev_probe(struct device *dev)
{
struct scmi_driver *scmi_drv = to_scmi_driver(dev->driver);
@@ -232,48 +206,6 @@ void scmi_set_handle(struct scmi_device *scmi_dev)
scmi_device_link_add(&scmi_dev->dev, scmi_dev->handle->dev);
}
-int scmi_protocol_register(const struct scmi_protocol *proto)
-{
- int ret;
-
- if (!proto) {
- pr_err("invalid protocol\n");
- return -EINVAL;
- }
-
- if (!proto->instance_init) {
- pr_err("missing init for protocol 0x%x\n", proto->id);
- return -EINVAL;
- }
-
- spin_lock(&protocol_lock);
- ret = idr_alloc(&scmi_protocols, (void *)proto,
- proto->id, proto->id + 1, GFP_ATOMIC);
- spin_unlock(&protocol_lock);
- if (ret != proto->id) {
- pr_err("unable to allocate SCMI idr slot for 0x%x - err %d\n",
- proto->id, ret);
- return ret;
- }
-
- pr_debug("Registered SCMI Protocol 0x%x\n", proto->id);
-
- return 0;
-}
-EXPORT_SYMBOL_GPL(scmi_protocol_register);
-
-void scmi_protocol_unregister(const struct scmi_protocol *proto)
-{
- spin_lock(&protocol_lock);
- idr_remove(&scmi_protocols, proto->id);
- spin_unlock(&protocol_lock);
-
- pr_debug("Unregistered SCMI Protocol 0x%x\n", proto->id);
-
- return;
-}
-EXPORT_SYMBOL_GPL(scmi_protocol_unregister);
-
static int __scmi_devices_unregister(struct device *dev, void *data)
{
struct scmi_device *scmi_dev = to_scmi_dev(dev);
diff --git a/drivers/firmware/arm_scmi/common.h b/drivers/firmware/arm_scmi/common.h
index 136bfd30f99c..6a38244494fd 100644
--- a/drivers/firmware/arm_scmi/common.h
+++ b/drivers/firmware/arm_scmi/common.h
@@ -106,9 +106,6 @@ void scmi_setup_protocol_implemented(const struct scmi_protocol_handle *ph,
int __init scmi_bus_init(void);
void __exit scmi_bus_exit(void);
-const struct scmi_protocol *scmi_protocol_get(int protocol_id);
-void scmi_protocol_put(int protocol_id);
-
int scmi_protocol_acquire(const struct scmi_handle *handle, u8 protocol_id);
void scmi_protocol_release(const struct scmi_handle *handle, u8 protocol_id);
diff --git a/drivers/firmware/arm_scmi/driver.c b/drivers/firmware/arm_scmi/driver.c
index f85b34e69d01..d1e32ea6d90a 100644
--- a/drivers/firmware/arm_scmi/driver.c
+++ b/drivers/firmware/arm_scmi/driver.c
@@ -51,6 +51,9 @@ enum scmi_error_codes {
SCMI_ERR_PROTOCOL = -10,/* Protocol Error */
};
+static DEFINE_IDR(scmi_protocols);
+static DEFINE_SPINLOCK(protocol_lock);
+
/* List of all SCMI devices active in system */
static LIST_HEAD(scmi_list);
/* Protection for the entire list */
@@ -194,6 +197,70 @@ static inline int scmi_to_linux_errno(int errno)
return -EIO;
}
+static const struct scmi_protocol *scmi_protocol_get(int protocol_id)
+{
+ const struct scmi_protocol *proto;
+
+ proto = idr_find(&scmi_protocols, protocol_id);
+ if (!proto || !try_module_get(proto->owner)) {
+ pr_warn("SCMI Protocol 0x%x not found!\n", protocol_id);
+ return NULL;
+ }
+
+ pr_debug("Found SCMI Protocol 0x%x\n", protocol_id);
+
+ return proto;
+}
+
+static void scmi_protocol_put(int protocol_id)
+{
+ const struct scmi_protocol *proto;
+
+ proto = idr_find(&scmi_protocols, protocol_id);
+ if (proto)
+ module_put(proto->owner);
+}
+
+int scmi_protocol_register(const struct scmi_protocol *proto)
+{
+ int ret;
+
+ if (!proto) {
+ pr_err("invalid protocol\n");
+ return -EINVAL;
+ }
+
+ if (!proto->instance_init) {
+ pr_err("missing init for protocol 0x%x\n", proto->id);
+ return -EINVAL;
+ }
+
+ spin_lock(&protocol_lock);
+ ret = idr_alloc(&scmi_protocols, (void *)proto,
+ proto->id, proto->id + 1, GFP_ATOMIC);
+ spin_unlock(&protocol_lock);
+ if (ret != proto->id) {
+ pr_err("unable to allocate SCMI idr slot for 0x%x - err %d\n",
+ proto->id, ret);
+ return ret;
+ }
+
+ pr_debug("Registered SCMI Protocol 0x%x\n", proto->id);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(scmi_protocol_register);
+
+void scmi_protocol_unregister(const struct scmi_protocol *proto)
+{
+ spin_lock(&protocol_lock);
+ idr_remove(&scmi_protocols, proto->id);
+ spin_unlock(&protocol_lock);
+
+ pr_debug("Unregistered SCMI Protocol 0x%x\n", proto->id);
+}
+EXPORT_SYMBOL_GPL(scmi_protocol_unregister);
+
void scmi_notification_instance_data_set(const struct scmi_handle *handle,
void *priv)
{
--
2.34.1
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