static int rpmsg_dev_remove(struct device *dev)
{
struct rpmsg_channel *rpdev = to_rpmsg_channel(dev);
struct rpmsg_driver *rpdrv = to_rpmsg_driver(rpdev->dev.driver);
struct virtproc_info *vrp = rpdev->vrp;
int err = 0;
/* tell remote processor's name service we're removing this channel */
if (rpdev->announce &&
virtio_has_feature(vrp->vdev, VIRTIO_RPMSG_F_NS)) {
struct rpmsg_ns_msg nsm;
strncpy(nsm.name, rpdev->id.name, RPMSG_NAME_SIZE);
nsm.addr = rpdev->src;
nsm.flags = RPMSG_NS_DESTROY;
err = rpmsg_sendto(rpdev, &nsm, sizeof(nsm), RPMSG_NS_ADDR);
if (err)
dev_err(dev, "failed to announce service %d\n", err);
}
rpdrv->remove(rpdev);
rpmsg_destroy_ept(rpdev->ept);
return err;
}
/* match rpmsg channel and rpmsg driver */
static int rpmsg_dev_match(struct device *dev, struct device_driver *drv)
{
struct rpmsg_channel *rpdev = to_rpmsg_channel(dev);
struct rpmsg_driver *rpdrv = to_rpmsg_driver(drv);
const struct rpmsg_device_id *ids = rpdrv->id_table;
unsigned int i;
for (i = 0; ids[i].name[0]; i++)
if (rpmsg_id_match(rpdev, &ids[i]))
return 1;
return 0;
}
static int rpmsg_dev_remove(struct device *dev)
{
struct rpmsg_device *rpdev = to_rpmsg_device(dev);
struct rpmsg_driver *rpdrv = to_rpmsg_driver(rpdev->dev.driver);
int err = 0;
if (rpdev->ops->announce_destroy)
err = rpdev->ops->announce_destroy(rpdev);
rpdrv->remove(rpdev);
if (rpdev->ept)
rpmsg_destroy_ept(rpdev->ept);
return err;
}
/* match rpmsg channel and rpmsg driver */
static int rpmsg_dev_match(struct device *dev, struct device_driver *drv)
{
struct rpmsg_device *rpdev = to_rpmsg_device(dev);
struct rpmsg_driver *rpdrv = to_rpmsg_driver(drv);
const struct rpmsg_device_id *ids = rpdrv->id_table;
unsigned int i;
if (rpdev->driver_override)
return !strcmp(rpdev->driver_override, drv->name);
if (ids)
for (i = 0; ids[i].name[0]; i++)
if (rpmsg_id_match(rpdev, &ids[i]))
return 1;
return of_driver_match_device(dev, drv);
}
static int rpmsg_dev_probe(struct device *dev)
{
struct rpmsg_channel *rpdev = to_rpmsg_channel(dev);
struct rpmsg_driver *rpdrv = to_rpmsg_driver(rpdev->dev.driver);
struct virtproc_info *vrp = rpdev->vrp;
struct rpmsg_endpoint *ept;
int err;
ept = rpmsg_create_ept(rpdev, rpdrv->callback, NULL, rpdev->src);
if (!ept) {
dev_err(dev, "failed to create endpoint\n");
err = -ENOMEM;
goto out;
}
rpdev->ept = ept;
rpdev->src = ept->addr;
err = rpdrv->probe(rpdev);
if (err) {
dev_err(dev, "%s: failed: %d\n", __func__, err);
rpmsg_destroy_ept(ept);
goto out;
}
/* need to tell remote processor's name service about this channel ? */
if (rpdev->announce &&
virtio_has_feature(vrp->vdev, VIRTIO_RPMSG_F_NS)) {
struct rpmsg_ns_msg nsm;
strncpy(nsm.name, rpdev->id.name, RPMSG_NAME_SIZE);
nsm.addr = rpdev->src;
nsm.flags = RPMSG_NS_CREATE;
err = rpmsg_sendto(rpdev, &nsm, sizeof(nsm), RPMSG_NS_ADDR);
if (err)
dev_err(dev, "failed to announce service %d\n", err);
}
out:
return err;
}
/*
* when an rpmsg driver is probed with a channel, we seamlessly create
* it an endpoint, binding its rx callback to a unique local rpmsg
* address.
*
* if we need to, we also announce about this channel to the remote
* processor (needed in case the driver is exposing an rpmsg service).
*/
static int rpmsg_dev_probe(struct device *dev)
{
struct rpmsg_device *rpdev = to_rpmsg_device(dev);
struct rpmsg_driver *rpdrv = to_rpmsg_driver(rpdev->dev.driver);
struct rpmsg_channel_info chinfo = {};
struct rpmsg_endpoint *ept = NULL;
int err;
if (rpdrv->callback) {
strncpy(chinfo.name, rpdev->id.name, RPMSG_NAME_SIZE);
chinfo.src = rpdev->src;
chinfo.dst = RPMSG_ADDR_ANY;
ept = rpmsg_create_ept(rpdev, rpdrv->callback, NULL, chinfo);
if (!ept) {
dev_err(dev, "failed to create endpoint\n");
err = -ENOMEM;
goto out;
}
rpdev->ept = ept;
rpdev->src = ept->addr;
}
err = rpdrv->probe(rpdev);
if (err) {
dev_err(dev, "%s: failed: %d\n", __func__, err);
if (ept)
rpmsg_destroy_ept(ept);
goto out;
}
if (ept && rpdev->ops->announce_create)
err = rpdev->ops->announce_create(rpdev);
out:
return err;
}
