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rpmsg: Indirection table for rpmsg_endpoint operations

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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:
Bjorn Andersson 2016-09-01 15:28:00 -07:00
parent 026dad47a8
commit 8a228ecfe0
2 changed files with 120 additions and 27 deletions
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62
include/linux/rpmsg.h
View file

@ -96,8 +96,10 @@ enum rpmsg_ns_flags {
#define RPMSG_ADDR_ANY 0xFFFFFFFF
struct virtproc_info;
struct rpmsg_device;
struct rpmsg_endpoint;
struct rpmsg_device_ops;
struct rpmsg_endpoint_ops;
/**
* struct rpmsg_channel_info - channel info representation
@ -184,6 +186,36 @@ struct rpmsg_endpoint {
struct mutex cb_lock;
u32 addr;
void *priv;
const struct rpmsg_endpoint_ops *ops;
};
/**
* struct rpmsg_endpoint_ops - indirection table for rpmsg_endpoint operations
* @destroy_ept: destroy the given endpoint, required
* @send: see @rpmsg_send(), required
* @sendto: see @rpmsg_sendto(), optional
* @send_offchannel: see @rpmsg_send_offchannel(), optional
* @trysend: see @rpmsg_trysend(), required
* @trysendto: see @rpmsg_trysendto(), optional
* @trysend_offchannel: see @rpmsg_trysend_offchannel(), optional
*
* Indirection table for the operations that a rpmsg backend should implement.
* In addition to @destroy_ept, the backend must at least implement @send and
* @trysend, while the variants sending data off-channel are optional.
*/
struct rpmsg_endpoint_ops {
void (*destroy_ept)(struct rpmsg_endpoint *ept);
int (*send)(struct rpmsg_endpoint *ept, void *data, int len);
int (*sendto)(struct rpmsg_endpoint *ept, void *data, int len, u32 dst);
int (*send_offchannel)(struct rpmsg_endpoint *ept, u32 src, u32 dst,
void *data, int len);
int (*trysend)(struct rpmsg_endpoint *ept, void *data, int len);
int (*trysendto)(struct rpmsg_endpoint *ept, void *data, int len, u32 dst);
int (*trysend_offchannel)(struct rpmsg_endpoint *ept, u32 src, u32 dst,
void *data, int len);
};
/**
@ -210,8 +242,6 @@ void rpmsg_destroy_ept(struct rpmsg_endpoint *);
struct rpmsg_endpoint *rpmsg_create_ept(struct rpmsg_device *,
rpmsg_rx_cb_t cb, void *priv,
struct rpmsg_channel_info chinfo);
int
rpmsg_send_offchannel_raw(struct rpmsg_device *, u32, u32, void *, int, bool);
/* use a macro to avoid include chaining to get THIS_MODULE */
#define register_rpmsg_driver(drv) \
@ -249,10 +279,7 @@ rpmsg_send_offchannel_raw(struct rpmsg_device *, u32, u32, void *, int, bool);
*/
static inline int rpmsg_send(struct rpmsg_endpoint *ept, void *data, int len)
{
struct rpmsg_device *rpdev = ept->rpdev;
u32 src = ept->addr, dst = rpdev->dst;
return rpmsg_send_offchannel_raw(rpdev, src, dst, data, len, true);
return ept->ops->send(ept, data, len);
}
/**
@ -276,10 +303,7 @@ static inline int rpmsg_send(struct rpmsg_endpoint *ept, void *data, int len)
static inline
int rpmsg_sendto(struct rpmsg_endpoint *ept, void *data, int len, u32 dst)
{
struct rpmsg_device *rpdev = ept->rpdev;
u32 src = ept->addr;
return rpmsg_send_offchannel_raw(rpdev, src, dst, data, len, true);
return ept->ops->sendto(ept, data, len, dst);
}
/**
@ -306,9 +330,7 @@ static inline
int rpmsg_send_offchannel(struct rpmsg_endpoint *ept, u32 src, u32 dst,
void *data, int len)
{
struct rpmsg_device *rpdev = ept->rpdev;
return rpmsg_send_offchannel_raw(rpdev, src, dst, data, len, true);
return ept->ops->send_offchannel(ept, src, dst, data, len);
}
/**
@ -331,10 +353,7 @@ int rpmsg_send_offchannel(struct rpmsg_endpoint *ept, u32 src, u32 dst,
static inline
int rpmsg_trysend(struct rpmsg_endpoint *ept, void *data, int len)
{
struct rpmsg_device *rpdev = ept->rpdev;
u32 src = ept->addr, dst = rpdev->dst;
return rpmsg_send_offchannel_raw(rpdev, src, dst, data, len, false);
return ept->ops->trysend(ept, data, len);
}
/**
@ -357,10 +376,7 @@ int rpmsg_trysend(struct rpmsg_endpoint *ept, void *data, int len)
static inline
int rpmsg_trysendto(struct rpmsg_endpoint *ept, void *data, int len, u32 dst)
{
struct rpmsg_device *rpdev = ept->rpdev;
u32 src = ept->addr;
return rpmsg_send_offchannel_raw(rpdev, src, dst, data, len, false);
return ept->ops->trysendto(ept, data, len, dst);
}
/**
@ -386,9 +402,7 @@ static inline
int rpmsg_trysend_offchannel(struct rpmsg_endpoint *ept, u32 src, u32 dst,
void *data, int len)
{
struct rpmsg_device *rpdev = ept->rpdev;
return rpmsg_send_offchannel_raw(rpdev, src, dst, data, len, false);
return ept->ops->trysend_offchannel(ept, src, dst, data, len);
}
#endif /* _LINUX_RPMSG_H */