forked from Minki/linux
rpmsg: Indirection table for rpmsg_endpoint operations
Add indirection table for rpmsg_endpoint related operations and move virtio implementation behind this, this finishes of the decoupling of the virtio implementation from the public API. Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
This commit is contained in:
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026dad47a8
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8a228ecfe0
@ -107,6 +107,18 @@ struct virtproc_info {
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/* Address 53 is reserved for advertising remote services */
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#define RPMSG_NS_ADDR (53)
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static void virtio_rpmsg_destroy_ept(struct rpmsg_endpoint *ept);
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static int virtio_rpmsg_send(struct rpmsg_endpoint *ept, void *data, int len);
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static int virtio_rpmsg_sendto(struct rpmsg_endpoint *ept, void *data, int len,
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u32 dst);
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static int virtio_rpmsg_send_offchannel(struct rpmsg_endpoint *ept, u32 src,
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u32 dst, void *data, int len);
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static int virtio_rpmsg_trysend(struct rpmsg_endpoint *ept, void *data, int len);
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static int virtio_rpmsg_trysendto(struct rpmsg_endpoint *ept, void *data,
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int len, u32 dst);
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static int virtio_rpmsg_trysend_offchannel(struct rpmsg_endpoint *ept, u32 src,
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u32 dst, void *data, int len);
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/* sysfs show configuration fields */
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#define rpmsg_show_attr(field, path, format_string) \
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static ssize_t \
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@ -172,6 +184,16 @@ static int rpmsg_uevent(struct device *dev, struct kobj_uevent_env *env)
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rpdev->id.name);
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}
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static const struct rpmsg_endpoint_ops virtio_endpoint_ops = {
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.destroy_ept = virtio_rpmsg_destroy_ept,
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.send = virtio_rpmsg_send,
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.sendto = virtio_rpmsg_sendto,
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.send_offchannel = virtio_rpmsg_send_offchannel,
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.trysend = virtio_rpmsg_trysend,
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.trysendto = virtio_rpmsg_trysendto,
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.trysend_offchannel = virtio_rpmsg_trysend_offchannel,
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};
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/**
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* __ept_release() - deallocate an rpmsg endpoint
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* @kref: the ept's reference count
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@ -212,6 +234,7 @@ static struct rpmsg_endpoint *__rpmsg_create_ept(struct virtproc_info *vrp,
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ept->rpdev = rpdev;
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ept->cb = cb;
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ept->priv = priv;
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ept->ops = &virtio_endpoint_ops;
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/* do we need to allocate a local address ? */
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if (addr == RPMSG_ADDR_ANY) {
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@ -285,10 +308,15 @@ __rpmsg_destroy_ept(struct virtproc_info *vrp, struct rpmsg_endpoint *ept)
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*/
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void rpmsg_destroy_ept(struct rpmsg_endpoint *ept)
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{
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__rpmsg_destroy_ept(ept->rpdev->vrp, ept);
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ept->ops->destroy_ept(ept);
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}
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EXPORT_SYMBOL(rpmsg_destroy_ept);
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static void virtio_rpmsg_destroy_ept(struct rpmsg_endpoint *ept)
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{
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__rpmsg_destroy_ept(ept->rpdev->vrp, ept);
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}
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/*
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* when an rpmsg driver is probed with a channel, we seamlessly create
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* it an endpoint, binding its rx callback to a unique local rpmsg
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@ -657,8 +685,9 @@ static void rpmsg_downref_sleepers(struct virtproc_info *vrp)
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*
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* Returns 0 on success and an appropriate error value on failure.
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*/
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int rpmsg_send_offchannel_raw(struct rpmsg_device *rpdev, u32 src, u32 dst,
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void *data, int len, bool wait)
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static int rpmsg_send_offchannel_raw(struct rpmsg_device *rpdev,
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u32 src, u32 dst,
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void *data, int len, bool wait)
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{
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struct virtproc_info *vrp = rpdev->vrp;
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struct device *dev = &rpdev->dev;
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@ -754,6 +783,56 @@ out:
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}
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EXPORT_SYMBOL(rpmsg_send_offchannel_raw);
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static int virtio_rpmsg_send(struct rpmsg_endpoint *ept, void *data, int len)
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{
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struct rpmsg_device *rpdev = ept->rpdev;
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u32 src = ept->addr, dst = rpdev->dst;
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return rpmsg_send_offchannel_raw(rpdev, src, dst, data, len, true);
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}
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static int virtio_rpmsg_sendto(struct rpmsg_endpoint *ept, void *data, int len,
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u32 dst)
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{
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struct rpmsg_device *rpdev = ept->rpdev;
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u32 src = ept->addr;
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return rpmsg_send_offchannel_raw(rpdev, src, dst, data, len, true);
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}
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static int virtio_rpmsg_send_offchannel(struct rpmsg_endpoint *ept, u32 src,
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u32 dst, void *data, int len)
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{
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struct rpmsg_device *rpdev = ept->rpdev;
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return rpmsg_send_offchannel_raw(rpdev, src, dst, data, len, true);
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}
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static int virtio_rpmsg_trysend(struct rpmsg_endpoint *ept, void *data, int len)
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{
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struct rpmsg_device *rpdev = ept->rpdev;
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u32 src = ept->addr, dst = rpdev->dst;
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return rpmsg_send_offchannel_raw(rpdev, src, dst, data, len, false);
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}
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static int virtio_rpmsg_trysendto(struct rpmsg_endpoint *ept, void *data,
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int len, u32 dst)
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{
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struct rpmsg_device *rpdev = ept->rpdev;
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u32 src = ept->addr;
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return rpmsg_send_offchannel_raw(rpdev, src, dst, data, len, false);
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}
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static int virtio_rpmsg_trysend_offchannel(struct rpmsg_endpoint *ept, u32 src,
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u32 dst, void *data, int len)
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{
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struct rpmsg_device *rpdev = ept->rpdev;
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return rpmsg_send_offchannel_raw(rpdev, src, dst, data, len, false);
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}
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static int rpmsg_recv_single(struct virtproc_info *vrp, struct device *dev,
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struct rpmsg_hdr *msg, unsigned int len)
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{
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@ -96,8 +96,10 @@ enum rpmsg_ns_flags {
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#define RPMSG_ADDR_ANY 0xFFFFFFFF
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struct virtproc_info;
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struct rpmsg_device;
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struct rpmsg_endpoint;
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struct rpmsg_device_ops;
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struct rpmsg_endpoint_ops;
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/**
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* struct rpmsg_channel_info - channel info representation
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@ -184,6 +186,36 @@ struct rpmsg_endpoint {
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struct mutex cb_lock;
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u32 addr;
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void *priv;
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const struct rpmsg_endpoint_ops *ops;
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};
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/**
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* struct rpmsg_endpoint_ops - indirection table for rpmsg_endpoint operations
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* @destroy_ept: destroy the given endpoint, required
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* @send: see @rpmsg_send(), required
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* @sendto: see @rpmsg_sendto(), optional
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* @send_offchannel: see @rpmsg_send_offchannel(), optional
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* @trysend: see @rpmsg_trysend(), required
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* @trysendto: see @rpmsg_trysendto(), optional
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* @trysend_offchannel: see @rpmsg_trysend_offchannel(), optional
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*
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* Indirection table for the operations that a rpmsg backend should implement.
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* In addition to @destroy_ept, the backend must at least implement @send and
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* @trysend, while the variants sending data off-channel are optional.
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*/
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struct rpmsg_endpoint_ops {
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void (*destroy_ept)(struct rpmsg_endpoint *ept);
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int (*send)(struct rpmsg_endpoint *ept, void *data, int len);
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int (*sendto)(struct rpmsg_endpoint *ept, void *data, int len, u32 dst);
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int (*send_offchannel)(struct rpmsg_endpoint *ept, u32 src, u32 dst,
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void *data, int len);
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int (*trysend)(struct rpmsg_endpoint *ept, void *data, int len);
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int (*trysendto)(struct rpmsg_endpoint *ept, void *data, int len, u32 dst);
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int (*trysend_offchannel)(struct rpmsg_endpoint *ept, u32 src, u32 dst,
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void *data, int len);
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};
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/**
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@ -210,8 +242,6 @@ void rpmsg_destroy_ept(struct rpmsg_endpoint *);
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struct rpmsg_endpoint *rpmsg_create_ept(struct rpmsg_device *,
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rpmsg_rx_cb_t cb, void *priv,
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struct rpmsg_channel_info chinfo);
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int
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rpmsg_send_offchannel_raw(struct rpmsg_device *, u32, u32, void *, int, bool);
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/* use a macro to avoid include chaining to get THIS_MODULE */
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#define register_rpmsg_driver(drv) \
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@ -249,10 +279,7 @@ rpmsg_send_offchannel_raw(struct rpmsg_device *, u32, u32, void *, int, bool);
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*/
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static inline int rpmsg_send(struct rpmsg_endpoint *ept, void *data, int len)
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{
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struct rpmsg_device *rpdev = ept->rpdev;
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u32 src = ept->addr, dst = rpdev->dst;
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return rpmsg_send_offchannel_raw(rpdev, src, dst, data, len, true);
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return ept->ops->send(ept, data, len);
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}
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/**
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@ -276,10 +303,7 @@ static inline int rpmsg_send(struct rpmsg_endpoint *ept, void *data, int len)
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static inline
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int rpmsg_sendto(struct rpmsg_endpoint *ept, void *data, int len, u32 dst)
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{
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struct rpmsg_device *rpdev = ept->rpdev;
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u32 src = ept->addr;
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return rpmsg_send_offchannel_raw(rpdev, src, dst, data, len, true);
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return ept->ops->sendto(ept, data, len, dst);
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}
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/**
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@ -306,9 +330,7 @@ static inline
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int rpmsg_send_offchannel(struct rpmsg_endpoint *ept, u32 src, u32 dst,
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void *data, int len)
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{
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struct rpmsg_device *rpdev = ept->rpdev;
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return rpmsg_send_offchannel_raw(rpdev, src, dst, data, len, true);
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return ept->ops->send_offchannel(ept, src, dst, data, len);
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}
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/**
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@ -331,10 +353,7 @@ int rpmsg_send_offchannel(struct rpmsg_endpoint *ept, u32 src, u32 dst,
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static inline
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int rpmsg_trysend(struct rpmsg_endpoint *ept, void *data, int len)
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{
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struct rpmsg_device *rpdev = ept->rpdev;
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u32 src = ept->addr, dst = rpdev->dst;
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return rpmsg_send_offchannel_raw(rpdev, src, dst, data, len, false);
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return ept->ops->trysend(ept, data, len);
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}
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/**
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@ -357,10 +376,7 @@ int rpmsg_trysend(struct rpmsg_endpoint *ept, void *data, int len)
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static inline
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int rpmsg_trysendto(struct rpmsg_endpoint *ept, void *data, int len, u32 dst)
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{
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struct rpmsg_device *rpdev = ept->rpdev;
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u32 src = ept->addr;
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return rpmsg_send_offchannel_raw(rpdev, src, dst, data, len, false);
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return ept->ops->trysendto(ept, data, len, dst);
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}
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/**
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@ -386,9 +402,7 @@ static inline
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int rpmsg_trysend_offchannel(struct rpmsg_endpoint *ept, u32 src, u32 dst,
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void *data, int len)
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{
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struct rpmsg_device *rpdev = ept->rpdev;
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return rpmsg_send_offchannel_raw(rpdev, src, dst, data, len, false);
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return ept->ops->trysend_offchannel(ept, src, dst, data, len);
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}
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#endif /* _LINUX_RPMSG_H */
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