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rpmsg: virtio: Hide vrp pointer from the public API 

Create a container struct virtio_rpmsg_channel around the rpmsg_channel
to keep virtio backend information separate from the rpmsg and public
API. This makes the public structures independant of virtio.

Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
This commit is contained in:
Bjorn Andersson 2016-09-01 15:28:06 -07:00
parent fade037e0f
commit 3bf950ff23
2 changed files with 35 additions and 11 deletions
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43
drivers/rpmsg/virtio_rpmsg_bus.c
View File

@ -75,6 +75,18 @@ struct virtproc_info {
struct rpmsg_endpoint *ns_ept;
};
/**
* @vrp: the remote processor this channel belongs to
*/
struct virtio_rpmsg_channel {
struct rpmsg_device rpdev;
struct virtproc_info *vrp;
};
#define to_virtio_rpmsg_channel(_rpdev) \
container_of(_rpdev, struct virtio_rpmsg_channel, rpdev)
/*
* We're allocating buffers of 512 bytes each for communications. The
* number of buffers will be computed from the number of buffers supported
@ -204,7 +216,9 @@ static struct rpmsg_endpoint *virtio_rpmsg_create_ept(struct rpmsg_device *rpdev
void *priv,
struct rpmsg_channel_info chinfo)
{
return __rpmsg_create_ept(rpdev->vrp, rpdev, cb, priv, chinfo.src);
struct virtio_rpmsg_channel *vch = to_virtio_rpmsg_channel(rpdev);
return __rpmsg_create_ept(vch->vrp, rpdev, cb, priv, chinfo.src);
}
/**
@ -235,12 +249,15 @@ __rpmsg_destroy_ept(struct virtproc_info *vrp, struct rpmsg_endpoint *ept)
static void virtio_rpmsg_destroy_ept(struct rpmsg_endpoint *ept)
{
__rpmsg_destroy_ept(ept->rpdev->vrp, ept);
struct virtio_rpmsg_channel *vch = to_virtio_rpmsg_channel(ept->rpdev);
__rpmsg_destroy_ept(vch->vrp, ept);
}
static int virtio_rpmsg_announce_create(struct rpmsg_device *rpdev)
{
struct virtproc_info *vrp = rpdev->vrp;
struct virtio_rpmsg_channel *vch = to_virtio_rpmsg_channel(rpdev);
struct virtproc_info *vrp = vch->vrp;
struct device *dev = &rpdev->dev;
int err = 0;
@ -263,7 +280,8 @@ static int virtio_rpmsg_announce_create(struct rpmsg_device *rpdev)
static int virtio_rpmsg_announce_destroy(struct rpmsg_device *rpdev)
{
struct virtproc_info *vrp = rpdev->vrp;
struct virtio_rpmsg_channel *vch = to_virtio_rpmsg_channel(rpdev);
struct virtproc_info *vrp = vch->vrp;
struct device *dev = &rpdev->dev;
int err = 0;
@ -298,6 +316,7 @@ static const struct rpmsg_device_ops virtio_rpmsg_ops = {
static struct rpmsg_device *rpmsg_create_channel(struct virtproc_info *vrp,
struct rpmsg_channel_info *chinfo)
{
struct virtio_rpmsg_channel *vch;
struct rpmsg_device *rpdev;
struct device *tmp, *dev = &vrp->vdev->dev;
int ret;
@ -312,11 +331,18 @@ static struct rpmsg_device *rpmsg_create_channel(struct virtproc_info *vrp,
return NULL;
}
rpdev = kzalloc(sizeof(*rpdev), GFP_KERNEL);
if (!rpdev)
vch = kzalloc(sizeof(*vch), GFP_KERNEL);
if (!vch)
return NULL;
rpdev->vrp = vrp;
/* Link the channel to our vrp */
vch->vrp = vrp;
/* Assign callbacks for rpmsg_channel */
vch->rpdev.ops = &virtio_rpmsg_ops;
/* Assign public information to the rpmsg_device */
rpdev = &vch->rpdev;
rpdev->src = chinfo->src;
rpdev->dst = chinfo->dst;
rpdev->ops = &virtio_rpmsg_ops;
@ -455,7 +481,8 @@ static int rpmsg_send_offchannel_raw(struct rpmsg_device *rpdev,
u32 src, u32 dst,
void *data, int len, bool wait)
{
struct virtproc_info *vrp = rpdev->vrp;
struct virtio_rpmsg_channel *vch = to_virtio_rpmsg_channel(rpdev);
struct virtproc_info *vrp = vch->vrp;
struct device *dev = &rpdev->dev;
struct scatterlist sg;
struct rpmsg_hdr *msg;

3
include/linux/rpmsg.h
View File

@ -95,7 +95,6 @@ enum rpmsg_ns_flags {
#define RPMSG_ADDR_ANY 0xFFFFFFFF
struct virtproc_info;
struct rpmsg_device;
struct rpmsg_endpoint;
struct rpmsg_device_ops;
@ -115,7 +114,6 @@ struct rpmsg_channel_info {
/**
* rpmsg_device - device that belong to the rpmsg bus
* @vrp: the remote processor this channel belongs to
* @dev: the device struct
* @id: device id (used to match between rpmsg drivers and devices)
* @src: local address
@ -124,7 +122,6 @@ struct rpmsg_channel_info {
* @announce: if set, rpmsg will announce the creation/removal of this channel
*/
struct rpmsg_device {
struct virtproc_info *vrp;
struct device dev;
struct rpmsg_device_id id;
u32 src;