#define to_mei_cl_driver(d) container_of(d, struct mei_cl_driver, driver)
#define to_mei_cl_device(d) container_of(d, struct mei_cl_device, dev)
-static int mei_cl_device_match(struct device *dev, struct device_driver *drv)
+/**
+ * __mei_cl_send - internal client send (write)
+ *
+ * @cl: host client
+ * @buf: buffer to send
+ * @length: buffer length
+ * @blocking: wait for write completion
+ *
+ * Return: written size bytes or < 0 on error
+ */
+ssize_t __mei_cl_send(struct mei_cl *cl, u8 *buf, size_t length,
+ bool blocking)
{
- struct mei_cl_device *cldev = to_mei_cl_device(dev);
- struct mei_cl_driver *cldrv = to_mei_cl_driver(drv);
- const struct mei_cl_device_id *id;
- const uuid_le *uuid;
- const char *name;
-
- if (!cldev)
- return 0;
+ struct mei_device *bus;
+ struct mei_cl_cb *cb = NULL;
+ ssize_t rets;
- uuid = mei_me_cl_uuid(cldev->me_cl);
- name = cldev->name;
+ if (WARN_ON(!cl || !cl->dev))
+ return -ENODEV;
- if (!cldrv || !cldrv->id_table)
- return 0;
+ bus = cl->dev;
- id = cldrv->id_table;
+ mutex_lock(&bus->device_lock);
+ if (!mei_cl_is_connected(cl)) {
+ rets = -ENODEV;
+ goto out;
+ }
- while (uuid_le_cmp(NULL_UUID_LE, id->uuid)) {
+ /* Check if we have an ME client device */
+ if (!mei_me_cl_is_active(cl->me_cl)) {
+ rets = -ENOTTY;
+ goto out;
+ }
- if (!uuid_le_cmp(*uuid, id->uuid)) {
- if (id->name[0]) {
- if (!strncmp(name, id->name, sizeof(id->name)))
- return 1;
- } else {
- return 1;
- }
- }
+ if (length > mei_cl_mtu(cl)) {
+ rets = -EFBIG;
+ goto out;
+ }
- id++;
+ cb = mei_cl_alloc_cb(cl, length, MEI_FOP_WRITE, NULL);
+ if (!cb) {
+ rets = -ENOMEM;
+ goto out;
}
- return 0;
+ memcpy(cb->buf.data, buf, length);
+
+ rets = mei_cl_write(cl, cb, blocking);
+
+out:
+ mutex_unlock(&bus->device_lock);
+ if (rets < 0)
+ mei_io_cb_free(cb);
+
+ return rets;
}
-static int mei_cl_device_probe(struct device *dev)
+/**
+ * __mei_cl_recv - internal client receive (read)
+ *
+ * @cl: host client
+ * @buf: buffer to send
+ * @length: buffer length
+ *
+ * Return: read size in bytes of < 0 on error
+ */
+ssize_t __mei_cl_recv(struct mei_cl *cl, u8 *buf, size_t length)
{
- struct mei_cl_device *cldev = to_mei_cl_device(dev);
- struct mei_cl_driver *cldrv;
- struct mei_cl_device_id id;
-
- if (!cldev)
- return 0;
+ struct mei_device *bus;
+ struct mei_cl_cb *cb;
+ size_t r_length;
+ ssize_t rets;
- cldrv = to_mei_cl_driver(dev->driver);
- if (!cldrv || !cldrv->probe)
+ if (WARN_ON(!cl || !cl->dev))
return -ENODEV;
- dev_dbg(dev, "Device probe\n");
+ bus = cl->dev;
- strlcpy(id.name, cldev->name, sizeof(id.name));
+ mutex_lock(&bus->device_lock);
- return cldrv->probe(cldev, &id);
-}
+ cb = mei_cl_read_cb(cl, NULL);
+ if (cb)
+ goto copy;
-static int mei_cl_device_remove(struct device *dev)
-{
- struct mei_cl_device *cldev = to_mei_cl_device(dev);
- struct mei_cl_driver *cldrv;
+ rets = mei_cl_read_start(cl, length, NULL);
+ if (rets && rets != -EBUSY)
+ goto out;
- if (!cldev || !dev->driver)
- return 0;
+ /* wait on event only if there is no other waiter */
+ if (list_empty(&cl->rd_completed) && !waitqueue_active(&cl->rx_wait)) {
- if (cldev->event_cb) {
- cldev->event_cb = NULL;
- cancel_work_sync(&cldev->event_work);
- }
+ mutex_unlock(&bus->device_lock);
- cldrv = to_mei_cl_driver(dev->driver);
- if (!cldrv->remove) {
- dev->driver = NULL;
+ if (wait_event_interruptible(cl->rx_wait,
+ (!list_empty(&cl->rd_completed)) ||
+ (!mei_cl_is_connected(cl)))) {
- return 0;
+ if (signal_pending(current))
+ return -EINTR;
+ return -ERESTARTSYS;
+ }
+
+ mutex_lock(&bus->device_lock);
+
+ if (!mei_cl_is_connected(cl)) {
+ rets = -EBUSY;
+ goto out;
+ }
}
- return cldrv->remove(cldev);
-}
+ cb = mei_cl_read_cb(cl, NULL);
+ if (!cb) {
+ rets = 0;
+ goto out;
+ }
-static ssize_t name_show(struct device *dev, struct device_attribute *a,
- char *buf)
-{
- struct mei_cl_device *cldev = to_mei_cl_device(dev);
- size_t len;
+copy:
+ if (cb->status) {
+ rets = cb->status;
+ goto free;
+ }
- len = snprintf(buf, PAGE_SIZE, "%s", cldev->name);
+ r_length = min_t(size_t, length, cb->buf_idx);
+ memcpy(buf, cb->buf.data, r_length);
+ rets = r_length;
- return (len >= PAGE_SIZE) ? (PAGE_SIZE - 1) : len;
+free:
+ mei_io_cb_free(cb);
+out:
+ mutex_unlock(&bus->device_lock);
+
+ return rets;
}
-static DEVICE_ATTR_RO(name);
-static ssize_t uuid_show(struct device *dev, struct device_attribute *a,
- char *buf)
+/**
+ * mei_cl_send - me device send (write)
+ *
+ * @cldev: me client device
+ * @buf: buffer to send
+ * @length: buffer length
+ *
+ * Return: written size in bytes or < 0 on error
+ */
+ssize_t mei_cl_send(struct mei_cl_device *cldev, u8 *buf, size_t length)
{
- struct mei_cl_device *cldev = to_mei_cl_device(dev);
- const uuid_le *uuid = mei_me_cl_uuid(cldev->me_cl);
- size_t len;
+ struct mei_cl *cl = cldev->cl;
- len = snprintf(buf, PAGE_SIZE, "%pUl", uuid);
+ if (cl == NULL)
+ return -ENODEV;
- return (len >= PAGE_SIZE) ? (PAGE_SIZE - 1) : len;
+ return __mei_cl_send(cl, buf, length, 1);
}
-static DEVICE_ATTR_RO(uuid);
+EXPORT_SYMBOL_GPL(mei_cl_send);
-static ssize_t modalias_show(struct device *dev, struct device_attribute *a,
- char *buf)
+/**
+ * mei_cl_recv - client receive (read)
+ *
+ * @cldev: me client device
+ * @buf: buffer to send
+ * @length: buffer length
+ *
+ * Return: read size in bytes of < 0 on error
+ */
+ssize_t mei_cl_recv(struct mei_cl_device *cldev, u8 *buf, size_t length)
{
- struct mei_cl_device *cldev = to_mei_cl_device(dev);
- const uuid_le *uuid = mei_me_cl_uuid(cldev->me_cl);
- size_t len;
+ struct mei_cl *cl = cldev->cl;
- len = snprintf(buf, PAGE_SIZE, "mei:%s:" MEI_CL_UUID_FMT ":",
- cldev->name, MEI_CL_UUID_ARGS(uuid->b));
+ if (cl == NULL)
+ return -ENODEV;
- return (len >= PAGE_SIZE) ? (PAGE_SIZE - 1) : len;
+ return __mei_cl_recv(cl, buf, length);
}
-static DEVICE_ATTR_RO(modalias);
-
-static struct attribute *mei_cl_dev_attrs[] = {
- &dev_attr_name.attr,
- &dev_attr_uuid.attr,
- &dev_attr_modalias.attr,
- NULL,
-};
-ATTRIBUTE_GROUPS(mei_cl_dev);
+EXPORT_SYMBOL_GPL(mei_cl_recv);
-static int mei_cl_uevent(struct device *dev, struct kobj_uevent_env *env)
+/**
+ * mei_bus_event_work - dispatch rx event for a bus device
+ * and schedule new work
+ *
+ * @work: work
+ */
+static void mei_bus_event_work(struct work_struct *work)
{
- struct mei_cl_device *cldev = to_mei_cl_device(dev);
- const uuid_le *uuid = mei_me_cl_uuid(cldev->me_cl);
+ struct mei_cl_device *cldev;
- if (add_uevent_var(env, "MEI_CL_UUID=%pUl", uuid))
- return -ENOMEM;
+ cldev = container_of(work, struct mei_cl_device, event_work);
- if (add_uevent_var(env, "MEI_CL_NAME=%s", cldev->name))
- return -ENOMEM;
+ if (cldev->event_cb)
+ cldev->event_cb(cldev, cldev->events, cldev->event_context);
- if (add_uevent_var(env, "MODALIAS=mei:%s:" MEI_CL_UUID_FMT ":",
- cldev->name, MEI_CL_UUID_ARGS(uuid->b)))
- return -ENOMEM;
+ cldev->events = 0;
- return 0;
+ /* Prepare for the next read */
+ mei_cl_read_start(cldev->cl, 0, NULL);
}
-static struct bus_type mei_cl_bus_type = {
- .name = "mei",
- .dev_groups = mei_cl_dev_groups,
- .match = mei_cl_device_match,
- .probe = mei_cl_device_probe,
- .remove = mei_cl_device_remove,
- .uevent = mei_cl_uevent,
-};
-
-static void mei_cl_dev_release(struct device *dev)
+/**
+ * mei_cl_bus_rx_event - schedule rx evenet
+ *
+ * @cl: host client
+ */
+void mei_cl_bus_rx_event(struct mei_cl *cl)
{
- struct mei_cl_device *cldev = to_mei_cl_device(dev);
+ struct mei_cl_device *cldev = cl->cldev;
- if (!cldev)
+ if (!cldev || !cldev->event_cb)
return;
- mei_me_cl_put(cldev->me_cl);
- kfree(cldev);
-}
-
-static struct device_type mei_cl_device_type = {
- .release = mei_cl_dev_release,
-};
-
-struct mei_cl *mei_cl_bus_find_cl_by_uuid(struct mei_device *bus,
- uuid_le uuid)
-{
- struct mei_cl *cl;
-
- list_for_each_entry(cl, &bus->device_list, device_link) {
- if (cl->cldev && cl->cldev->me_cl &&
- !uuid_le_cmp(uuid, *mei_me_cl_uuid(cl->cldev->me_cl)))
- return cl;
- }
+ set_bit(MEI_CL_EVENT_RX, &cldev->events);
- return NULL;
+ schedule_work(&cldev->event_work);
}
-struct mei_cl_device *mei_cl_add_device(struct mei_device *bus,
- struct mei_me_client *me_cl,
- struct mei_cl *cl,
- char *name)
+/**
+ * mei_cl_register_event_cb - register event callback
+ *
+ * @cldev: me client devices
+ * @event_cb: callback function
+ * @context: driver context data
+ *
+ * Return: 0 on success
+ * -EALREADY if an callback is already registered
+ * <0 on other errors
+ */
+int mei_cl_register_event_cb(struct mei_cl_device *cldev,
+ mei_cl_event_cb_t event_cb, void *context)
{
- struct mei_cl_device *cldev;
- int status;
-
- cldev = kzalloc(sizeof(struct mei_cl_device), GFP_KERNEL);
- if (!cldev)
- return NULL;
-
- cldev->me_cl = mei_me_cl_get(me_cl);
- if (!cldev->me_cl) {
- kfree(cldev);
- return NULL;
- }
-
- cldev->cl = cl;
- cldev->dev.parent = bus->dev;
- cldev->dev.bus = &mei_cl_bus_type;
- cldev->dev.type = &mei_cl_device_type;
-
- strlcpy(cldev->name, name, sizeof(cldev->name));
-
- dev_set_name(&cldev->dev, "mei:%s:%pUl", name, mei_me_cl_uuid(me_cl));
+ if (cldev->event_cb)
+ return -EALREADY;
- status = device_register(&cldev->dev);
- if (status) {
- dev_err(bus->dev, "Failed to register MEI device\n");
- mei_me_cl_put(cldev->me_cl);
- kfree(cldev);
- return NULL;
- }
+ cldev->events = 0;
+ cldev->event_cb = event_cb;
+ cldev->event_context = context;
+ INIT_WORK(&cldev->event_work, mei_bus_event_work);
- cl->cldev = cldev;
+ mei_cl_read_start(cldev->cl, 0, NULL);
- dev_dbg(&cldev->dev, "client %s registered\n", name);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(mei_cl_register_event_cb);
- return cldev;
+/**
+ * mei_cl_get_drvdata - driver data getter
+ *
+ * @cldev: mei client device
+ *
+ * Return: driver private data
+ */
+void *mei_cl_get_drvdata(const struct mei_cl_device *cldev)
+{
+ return dev_get_drvdata(&cldev->dev);
}
-EXPORT_SYMBOL_GPL(mei_cl_add_device);
+EXPORT_SYMBOL_GPL(mei_cl_get_drvdata);
-void mei_cl_remove_device(struct mei_cl_device *cldev)
+/**
+ * mei_cl_set_drvdata - driver data setter
+ *
+ * @cldev: mei client device
+ * @data: data to store
+ */
+void mei_cl_set_drvdata(struct mei_cl_device *cldev, void *data)
{
- device_unregister(&cldev->dev);
+ dev_set_drvdata(&cldev->dev, data);
}
-EXPORT_SYMBOL_GPL(mei_cl_remove_device);
+EXPORT_SYMBOL_GPL(mei_cl_set_drvdata);
-int __mei_cl_driver_register(struct mei_cl_driver *cldrv, struct module *owner)
+/**
+ * mei_cl_enable_device - enable me client device
+ * create connection with me client
+ *
+ * @cldev: me client device
+ *
+ * Return: 0 on success and < 0 on error
+ */
+int mei_cl_enable_device(struct mei_cl_device *cldev)
{
int err;
+ struct mei_device *bus;
+ struct mei_cl *cl = cldev->cl;
- cldrv->driver.name = cldrv->name;
- cldrv->driver.owner = owner;
- cldrv->driver.bus = &mei_cl_bus_type;
+ if (cl == NULL)
+ return -ENODEV;
- err = driver_register(&cldrv->driver);
- if (err)
- return err;
+ bus = cl->dev;
- pr_debug("mei: driver [%s] registered\n", cldrv->driver.name);
+ mutex_lock(&bus->device_lock);
- return 0;
-}
-EXPORT_SYMBOL_GPL(__mei_cl_driver_register);
+ if (mei_cl_is_connected(cl)) {
+ mutex_unlock(&bus->device_lock);
+ dev_warn(bus->dev, "Already connected");
+ return -EBUSY;
+ }
-void mei_cl_driver_unregister(struct mei_cl_driver *cldrv)
-{
- driver_unregister(&cldrv->driver);
+ err = mei_cl_connect(cl, cldev->me_cl, NULL);
+ if (err < 0) {
+ mutex_unlock(&bus->device_lock);
+ dev_err(bus->dev, "Could not connect to the ME client");
- pr_debug("mei: driver [%s] unregistered\n", cldrv->driver.name);
+ return err;
+ }
+
+ mutex_unlock(&bus->device_lock);
+
+ if (cldev->event_cb)
+ mei_cl_read_start(cldev->cl, 0, NULL);
+
+ return 0;
}
-EXPORT_SYMBOL_GPL(mei_cl_driver_unregister);
+EXPORT_SYMBOL_GPL(mei_cl_enable_device);
-ssize_t __mei_cl_send(struct mei_cl *cl, u8 *buf, size_t length,
- bool blocking)
+/**
+ * mei_cl_disable_device - disable me client device
+ * disconnect form the me client
+ *
+ * @cldev: me client device
+ *
+ * Return: 0 on success and < 0 on error
+ */
+int mei_cl_disable_device(struct mei_cl_device *cldev)
{
+ int err;
struct mei_device *bus;
- struct mei_cl_cb *cb = NULL;
- ssize_t rets;
+ struct mei_cl *cl = cldev->cl;
- if (WARN_ON(!cl || !cl->dev))
+ if (cl == NULL)
return -ENODEV;
bus = cl->dev;
- mutex_lock(&bus->device_lock);
- if (!mei_cl_is_connected(cl)) {
- rets = -ENODEV;
- goto out;
- }
+ cldev->event_cb = NULL;
- /* Check if we have an ME client device */
- if (!mei_me_cl_is_active(cl->me_cl)) {
- rets = -ENOTTY;
- goto out;
- }
+ mutex_lock(&bus->device_lock);
- if (length > mei_cl_mtu(cl)) {
- rets = -EFBIG;
+ if (!mei_cl_is_connected(cl)) {
+ dev_err(bus->dev, "Already disconnected");
+ err = 0;
goto out;
}
- cb = mei_cl_alloc_cb(cl, length, MEI_FOP_WRITE, NULL);
- if (!cb) {
- rets = -ENOMEM;
+ err = mei_cl_disconnect(cl);
+ if (err < 0) {
+ dev_err(bus->dev, "Could not disconnect from the ME client");
goto out;
}
- memcpy(cb->buf.data, buf, length);
-
- rets = mei_cl_write(cl, cb, blocking);
+ /* Flush queues and remove any pending read */
+ mei_cl_flush_queues(cl, NULL);
out:
mutex_unlock(&bus->device_lock);
- if (rets < 0)
- mei_io_cb_free(cb);
+ return err;
- return rets;
}
+EXPORT_SYMBOL_GPL(mei_cl_disable_device);
-ssize_t __mei_cl_recv(struct mei_cl *cl, u8 *buf, size_t length)
+static int mei_cl_device_match(struct device *dev, struct device_driver *drv)
{
- struct mei_device *bus;
- struct mei_cl_cb *cb;
- size_t r_length;
- ssize_t rets;
+ struct mei_cl_device *cldev = to_mei_cl_device(dev);
+ struct mei_cl_driver *cldrv = to_mei_cl_driver(drv);
+ const struct mei_cl_device_id *id;
+ const uuid_le *uuid;
+ const char *name;
- if (WARN_ON(!cl || !cl->dev))
- return -ENODEV;
+ if (!cldev)
+ return 0;
- bus = cl->dev;
+ uuid = mei_me_cl_uuid(cldev->me_cl);
+ name = cldev->name;
- mutex_lock(&bus->device_lock);
+ if (!cldrv || !cldrv->id_table)
+ return 0;
- cb = mei_cl_read_cb(cl, NULL);
- if (cb)
- goto copy;
+ id = cldrv->id_table;
- rets = mei_cl_read_start(cl, length, NULL);
- if (rets && rets != -EBUSY)
- goto out;
+ while (uuid_le_cmp(NULL_UUID_LE, id->uuid)) {
- if (list_empty(&cl->rd_completed) && !waitqueue_active(&cl->rx_wait)) {
+ if (!uuid_le_cmp(*uuid, id->uuid)) {
+ if (id->name[0]) {
+ if (!strncmp(name, id->name, sizeof(id->name)))
+ return 1;
+ } else {
+ return 1;
+ }
+ }
- mutex_unlock(&bus->device_lock);
+ id++;
+ }
- if (wait_event_interruptible(cl->rx_wait,
- (!list_empty(&cl->rd_completed)) ||
- (!mei_cl_is_connected(cl)))) {
+ return 0;
+}
- if (signal_pending(current))
- return -EINTR;
- return -ERESTARTSYS;
- }
+static int mei_cl_device_probe(struct device *dev)
+{
+ struct mei_cl_device *cldev = to_mei_cl_device(dev);
+ struct mei_cl_driver *cldrv;
+ struct mei_cl_device_id id;
- mutex_lock(&bus->device_lock);
+ if (!cldev)
+ return 0;
- if (!mei_cl_is_connected(cl)) {
- rets = -EBUSY;
- goto out;
- }
- }
+ cldrv = to_mei_cl_driver(dev->driver);
+ if (!cldrv || !cldrv->probe)
+ return -ENODEV;
+
+ dev_dbg(dev, "Device probe\n");
+
+ strlcpy(id.name, cldev->name, sizeof(id.name));
+
+ return cldrv->probe(cldev, &id);
+}
- cb = mei_cl_read_cb(cl, NULL);
- if (!cb) {
- rets = 0;
- goto out;
- }
+static int mei_cl_device_remove(struct device *dev)
+{
+ struct mei_cl_device *cldev = to_mei_cl_device(dev);
+ struct mei_cl_driver *cldrv;
-copy:
- if (cb->status) {
- rets = cb->status;
- goto free;
+ if (!cldev || !dev->driver)
+ return 0;
+
+ if (cldev->event_cb) {
+ cldev->event_cb = NULL;
+ cancel_work_sync(&cldev->event_work);
}
- r_length = min_t(size_t, length, cb->buf_idx);
- memcpy(buf, cb->buf.data, r_length);
- rets = r_length;
+ cldrv = to_mei_cl_driver(dev->driver);
+ if (!cldrv->remove) {
+ dev->driver = NULL;
-free:
- mei_io_cb_free(cb);
-out:
- mutex_unlock(&bus->device_lock);
+ return 0;
+ }
- return rets;
+ return cldrv->remove(cldev);
}
-ssize_t mei_cl_send(struct mei_cl_device *cldev, u8 *buf, size_t length)
+static ssize_t name_show(struct device *dev, struct device_attribute *a,
+ char *buf)
{
- struct mei_cl *cl = cldev->cl;
+ struct mei_cl_device *cldev = to_mei_cl_device(dev);
+ size_t len;
- if (cl == NULL)
- return -ENODEV;
+ len = snprintf(buf, PAGE_SIZE, "%s", cldev->name);
- return __mei_cl_send(cl, buf, length, 1);
+ return (len >= PAGE_SIZE) ? (PAGE_SIZE - 1) : len;
}
-EXPORT_SYMBOL_GPL(mei_cl_send);
+static DEVICE_ATTR_RO(name);
-ssize_t mei_cl_recv(struct mei_cl_device *cldev, u8 *buf, size_t length)
+static ssize_t uuid_show(struct device *dev, struct device_attribute *a,
+ char *buf)
{
- struct mei_cl *cl = cldev->cl;
+ struct mei_cl_device *cldev = to_mei_cl_device(dev);
+ const uuid_le *uuid = mei_me_cl_uuid(cldev->me_cl);
+ size_t len;
- if (cl == NULL)
- return -ENODEV;
+ len = snprintf(buf, PAGE_SIZE, "%pUl", uuid);
- return __mei_cl_recv(cl, buf, length);
+ return (len >= PAGE_SIZE) ? (PAGE_SIZE - 1) : len;
}
-EXPORT_SYMBOL_GPL(mei_cl_recv);
+static DEVICE_ATTR_RO(uuid);
-static void mei_bus_event_work(struct work_struct *work)
+static ssize_t modalias_show(struct device *dev, struct device_attribute *a,
+ char *buf)
{
- struct mei_cl_device *cldev;
-
- cldev = container_of(work, struct mei_cl_device, event_work);
-
- if (cldev->event_cb)
- cldev->event_cb(cldev, cldev->events, cldev->event_context);
+ struct mei_cl_device *cldev = to_mei_cl_device(dev);
+ const uuid_le *uuid = mei_me_cl_uuid(cldev->me_cl);
+ size_t len;
- cldev->events = 0;
+ len = snprintf(buf, PAGE_SIZE, "mei:%s:" MEI_CL_UUID_FMT ":",
+ cldev->name, MEI_CL_UUID_ARGS(uuid->b));
- /* Prepare for the next read */
- mei_cl_read_start(cldev->cl, 0, NULL);
+ return (len >= PAGE_SIZE) ? (PAGE_SIZE - 1) : len;
}
+static DEVICE_ATTR_RO(modalias);
-int mei_cl_register_event_cb(struct mei_cl_device *cldev,
- mei_cl_event_cb_t event_cb, void *context)
+static struct attribute *mei_cl_dev_attrs[] = {
+ &dev_attr_name.attr,
+ &dev_attr_uuid.attr,
+ &dev_attr_modalias.attr,
+ NULL,
+};
+ATTRIBUTE_GROUPS(mei_cl_dev);
+
+static int mei_cl_uevent(struct device *dev, struct kobj_uevent_env *env)
{
- if (cldev->event_cb)
- return -EALREADY;
+ struct mei_cl_device *cldev = to_mei_cl_device(dev);
+ const uuid_le *uuid = mei_me_cl_uuid(cldev->me_cl);
- cldev->events = 0;
- cldev->event_cb = event_cb;
- cldev->event_context = context;
- INIT_WORK(&cldev->event_work, mei_bus_event_work);
+ if (add_uevent_var(env, "MEI_CL_UUID=%pUl", uuid))
+ return -ENOMEM;
- mei_cl_read_start(cldev->cl, 0, NULL);
+ if (add_uevent_var(env, "MEI_CL_NAME=%s", cldev->name))
+ return -ENOMEM;
+
+ if (add_uevent_var(env, "MODALIAS=mei:%s:" MEI_CL_UUID_FMT ":",
+ cldev->name, MEI_CL_UUID_ARGS(uuid->b)))
+ return -ENOMEM;
return 0;
}
-EXPORT_SYMBOL_GPL(mei_cl_register_event_cb);
-void *mei_cl_get_drvdata(const struct mei_cl_device *cldev)
+static struct bus_type mei_cl_bus_type = {
+ .name = "mei",
+ .dev_groups = mei_cl_dev_groups,
+ .match = mei_cl_device_match,
+ .probe = mei_cl_device_probe,
+ .remove = mei_cl_device_remove,
+ .uevent = mei_cl_uevent,
+};
+
+static void mei_cl_dev_release(struct device *dev)
{
- return dev_get_drvdata(&cldev->dev);
+ struct mei_cl_device *cldev = to_mei_cl_device(dev);
+
+ if (!cldev)
+ return;
+
+ mei_me_cl_put(cldev->me_cl);
+ kfree(cldev);
}
-EXPORT_SYMBOL_GPL(mei_cl_get_drvdata);
-void mei_cl_set_drvdata(struct mei_cl_device *cldev, void *data)
+static struct device_type mei_cl_device_type = {
+ .release = mei_cl_dev_release,
+};
+
+struct mei_cl *mei_cl_bus_find_cl_by_uuid(struct mei_device *bus,
+ uuid_le uuid)
{
- dev_set_drvdata(&cldev->dev, data);
+ struct mei_cl *cl;
+
+ list_for_each_entry(cl, &bus->device_list, device_link) {
+ if (cl->cldev && cl->cldev->me_cl &&
+ !uuid_le_cmp(uuid, *mei_me_cl_uuid(cl->cldev->me_cl)))
+ return cl;
+ }
+
+ return NULL;
}
-EXPORT_SYMBOL_GPL(mei_cl_set_drvdata);
-int mei_cl_enable_device(struct mei_cl_device *cldev)
+struct mei_cl_device *mei_cl_add_device(struct mei_device *bus,
+ struct mei_me_client *me_cl,
+ struct mei_cl *cl,
+ char *name)
{
- int err;
- struct mei_device *bus;
- struct mei_cl *cl = cldev->cl;
+ struct mei_cl_device *cldev;
+ int status;
- if (cl == NULL)
- return -ENODEV;
+ cldev = kzalloc(sizeof(struct mei_cl_device), GFP_KERNEL);
+ if (!cldev)
+ return NULL;
- bus = cl->dev;
+ cldev->me_cl = mei_me_cl_get(me_cl);
+ if (!cldev->me_cl) {
+ kfree(cldev);
+ return NULL;
+ }
- mutex_lock(&bus->device_lock);
+ cldev->cl = cl;
+ cldev->dev.parent = bus->dev;
+ cldev->dev.bus = &mei_cl_bus_type;
+ cldev->dev.type = &mei_cl_device_type;
- if (mei_cl_is_connected(cl)) {
- mutex_unlock(&bus->device_lock);
- dev_warn(bus->dev, "Already connected");
- return -EBUSY;
- }
+ strlcpy(cldev->name, name, sizeof(cldev->name));
- err = mei_cl_connect(cl, cldev->me_cl, NULL);
- if (err < 0) {
- mutex_unlock(&bus->device_lock);
- dev_err(bus->dev, "Could not connect to the ME client");
+ dev_set_name(&cldev->dev, "mei:%s:%pUl", name, mei_me_cl_uuid(me_cl));
- return err;
+ status = device_register(&cldev->dev);
+ if (status) {
+ dev_err(bus->dev, "Failed to register MEI device\n");
+ mei_me_cl_put(cldev->me_cl);
+ kfree(cldev);
+ return NULL;
}
- mutex_unlock(&bus->device_lock);
+ cl->cldev = cldev;
- if (cldev->event_cb)
- mei_cl_read_start(cldev->cl, 0, NULL);
+ dev_dbg(&cldev->dev, "client %s registered\n", name);
- return 0;
+ return cldev;
}
-EXPORT_SYMBOL_GPL(mei_cl_enable_device);
+EXPORT_SYMBOL_GPL(mei_cl_add_device);
-int mei_cl_disable_device(struct mei_cl_device *cldev)
+void mei_cl_remove_device(struct mei_cl_device *cldev)
{
- int err;
- struct mei_device *bus;
- struct mei_cl *cl = cldev->cl;
-
- if (cl == NULL)
- return -ENODEV;
-
- bus = cl->dev;
-
- cldev->event_cb = NULL;
-
- mutex_lock(&bus->device_lock);
+ device_unregister(&cldev->dev);
+}
+EXPORT_SYMBOL_GPL(mei_cl_remove_device);
- if (!mei_cl_is_connected(cl)) {
- dev_err(bus->dev, "Already disconnected");
- err = 0;
- goto out;
- }
+int __mei_cl_driver_register(struct mei_cl_driver *cldrv, struct module *owner)
+{
+ int err;
- err = mei_cl_disconnect(cl);
- if (err < 0) {
- dev_err(bus->dev, "Could not disconnect from the ME client");
- goto out;
- }
+ cldrv->driver.name = cldrv->name;
+ cldrv->driver.owner = owner;
+ cldrv->driver.bus = &mei_cl_bus_type;
- /* Flush queues and remove any pending read */
- mei_cl_flush_queues(cl, NULL);
+ err = driver_register(&cldrv->driver);
+ if (err)
+ return err;
-out:
- mutex_unlock(&bus->device_lock);
- return err;
+ pr_debug("mei: driver [%s] registered\n", cldrv->driver.name);
+ return 0;
}
-EXPORT_SYMBOL_GPL(mei_cl_disable_device);
+EXPORT_SYMBOL_GPL(__mei_cl_driver_register);
-void mei_cl_bus_rx_event(struct mei_cl *cl)
+void mei_cl_driver_unregister(struct mei_cl_driver *cldrv)
{
- struct mei_cl_device *cldev = cl->cldev;
-
- if (!cldev || !cldev->event_cb)
- return;
-
- set_bit(MEI_CL_EVENT_RX, &cldev->events);
+ driver_unregister(&cldrv->driver);
- schedule_work(&cldev->event_work);
+ pr_debug("mei: driver [%s] unregistered\n", cldrv->driver.name);
}
+EXPORT_SYMBOL_GPL(mei_cl_driver_unregister);
int __init mei_cl_bus_init(void)
{
projects / firefly-linux-kernel-4.4.55.git / commitdiff