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Date: Thu, 7 Feb 2013 23:03:10 +0200
From: Tomas Winkler <tomas.winkler@...el.com>
To: gregkh@...uxfoundation.org, sameo@...ux.intel.com
Cc: arnd@...db.de, linux-kernel@...r.kernel.org,
Tomas Winkler <tomas.winkler@...el.com>
Subject: [char-misc-next 04/11] mei: bus: Add bus related structures to mei_cl
From: Samuel Ortiz <sameo@...ux.intel.com>
We keep track of all MEI bus clients through a specific linked list.
We also have a mei_bus_client instance in the mei_cl structure.
Signed-off-by: Samuel Ortiz <sameo@...ux.intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@...el.com>
---
drivers/misc/mei/bus.c | 47 +++++++++++++++++++++++++++++++------------
drivers/misc/mei/client.c | 1 +
drivers/misc/mei/init.c | 1 +
drivers/misc/mei/mei_dev.h | 8 +++++++
4 files changed, 44 insertions(+), 13 deletions(-)
diff --git a/drivers/misc/mei/bus.c b/drivers/misc/mei/bus.c
index 9689b95..97afec6 100644
--- a/drivers/misc/mei/bus.c
+++ b/drivers/misc/mei/bus.c
@@ -119,16 +119,37 @@ static struct device_type mei_client_type = {
.release = mei_client_dev_release,
};
+static struct mei_cl *mei_bus_find_mei_cl_by_uuid(struct mei_device *mei_dev,
+ uuid_le uuid)
+{
+ struct mei_cl *cl, *next;
+
+ list_for_each_entry_safe(cl, next,
+ &mei_dev->bus_client_list, bus_client_link) {
+ if (!uuid_le_cmp(uuid, cl->bus_client_uuid))
+ return cl;
+ }
+
+ return NULL;
+}
+
struct mei_bus_client *mei_add_device(struct mei_device *mei_dev,
uuid_le uuid, char *name)
{
struct mei_bus_client *client;
+ struct mei_cl *cl;
int status;
+ cl = mei_bus_find_mei_cl_by_uuid(mei_dev, uuid);
+ if (cl == NULL)
+ return NULL;
+
client = kzalloc(sizeof(struct mei_bus_client), GFP_KERNEL);
if (!client)
return NULL;
+ client->cl = cl;
+
client->mei_dev = mei_dev;
client->uuid = uuid;
strlcpy(client->name, name, sizeof(client->name));
@@ -140,19 +161,17 @@ struct mei_bus_client *mei_add_device(struct mei_device *mei_dev,
dev_set_name(&client->dev, "%s", client->name);
status = device_register(&client->dev);
- if (status)
- goto out_err;
+ if (status) {
+ kfree(client);
+ dev_err(client->dev.parent, "Failed to register MEI client\n");
+ return NULL;
+ }
+
+ cl->client = client;
dev_dbg(&client->dev, "client %s registered\n", client->name);
return client;
-
-out_err:
- dev_err(client->dev.parent, "Failed to register MEI client\n");
-
- kfree(client);
-
- return NULL;
}
EXPORT_SYMBOL(mei_add_device);
@@ -353,9 +372,10 @@ out:
int mei_bus_send(struct mei_bus_client *client, u8 *buf, size_t length)
{
- struct mei_cl *cl = NULL;
+ struct mei_cl *cl = client->cl;
- /* TODO: hook between mei_bus_client and mei_cl */
+ if (cl == NULL)
+ return -ENODEV;
if (client->ops && client->ops->send)
return client->ops->send(client, buf, length);
@@ -366,9 +386,10 @@ EXPORT_SYMBOL(mei_bus_send);
int mei_bus_recv(struct mei_bus_client *client, u8 *buf, size_t length)
{
- struct mei_cl *cl = NULL;
+ struct mei_cl *cl = client->cl;
- /* TODO: hook between mei_bus_client and mei_cl */
+ if (cl == NULL)
+ return -ENODEV;
if (client->ops && client->ops->recv)
return client->ops->recv(client, buf, length);
diff --git a/drivers/misc/mei/client.c b/drivers/misc/mei/client.c
index 1569afe..5724499 100644
--- a/drivers/misc/mei/client.c
+++ b/drivers/misc/mei/client.c
@@ -216,6 +216,7 @@ void mei_cl_init(struct mei_cl *cl, struct mei_device *dev)
init_waitqueue_head(&cl->rx_wait);
init_waitqueue_head(&cl->tx_wait);
INIT_LIST_HEAD(&cl->link);
+ INIT_LIST_HEAD(&cl->bus_client_link);
cl->reading_state = MEI_IDLE;
cl->writing_state = MEI_IDLE;
cl->dev = dev;
diff --git a/drivers/misc/mei/init.c b/drivers/misc/mei/init.c
index 6ec5301..b812d56 100644
--- a/drivers/misc/mei/init.c
+++ b/drivers/misc/mei/init.c
@@ -46,6 +46,7 @@ void mei_device_init(struct mei_device *dev)
{
/* setup our list array */
INIT_LIST_HEAD(&dev->file_list);
+ INIT_LIST_HEAD(&dev->bus_client_list);
mutex_init(&dev->device_lock);
init_waitqueue_head(&dev->wait_recvd_msg);
init_waitqueue_head(&dev->wait_stop_wd);
diff --git a/drivers/misc/mei/mei_dev.h b/drivers/misc/mei/mei_dev.h
index 948f791..d9adad6 100644
--- a/drivers/misc/mei/mei_dev.h
+++ b/drivers/misc/mei/mei_dev.h
@@ -210,6 +210,11 @@ struct mei_cl {
enum mei_file_transaction_states writing_state;
int sm_state;
struct mei_cl_cb *read_cb;
+
+ /* MEI bus data */
+ struct mei_bus_client *client;
+ struct list_head bus_client_link;
+ uuid_le bus_client_uuid;
};
/** struct mei_hw_ops
@@ -403,6 +408,9 @@ struct mei_device {
struct work_struct init_work;
+ /* List of bus clients */
+ struct list_head bus_client_list;
+
const struct mei_hw_ops *ops;
char hw[0] __aligned(sizeof(void *));
};
--
1.7.4.4
--
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