From 8a228ecfe086b84e237a8d78be079e286e1ea67b Mon Sep 17 00:00:00 2001 From: Bjorn Andersson Date: Thu, 1 Sep 2016 15:28:00 -0700 Subject: [PATCH] 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 --- drivers/rpmsg/virtio_rpmsg_bus.c | 85 ++++++++++++++++++++++++++++++++++++++-- include/linux/rpmsg.h | 62 +++++++++++++++++------------ 2 files changed, 120 insertions(+), 27 deletions(-) diff --git a/drivers/rpmsg/virtio_rpmsg_bus.c b/drivers/rpmsg/virtio_rpmsg_bus.c index 605e09c..e5f2567 100644 --- a/drivers/rpmsg/virtio_rpmsg_bus.c +++ b/drivers/rpmsg/virtio_rpmsg_bus.c @@ -107,6 +107,18 @@ struct virtproc_info { /* Address 53 is reserved for advertising remote services */ #define RPMSG_NS_ADDR (53) +static void virtio_rpmsg_destroy_ept(struct rpmsg_endpoint *ept); +static int virtio_rpmsg_send(struct rpmsg_endpoint *ept, void *data, int len); +static int virtio_rpmsg_sendto(struct rpmsg_endpoint *ept, void *data, int len, + u32 dst); +static int virtio_rpmsg_send_offchannel(struct rpmsg_endpoint *ept, u32 src, + u32 dst, void *data, int len); +static int virtio_rpmsg_trysend(struct rpmsg_endpoint *ept, void *data, int len); +static int virtio_rpmsg_trysendto(struct rpmsg_endpoint *ept, void *data, + int len, u32 dst); +static int virtio_rpmsg_trysend_offchannel(struct rpmsg_endpoint *ept, u32 src, + u32 dst, void *data, int len); + /* sysfs show configuration fields */ #define rpmsg_show_attr(field, path, format_string) \ static ssize_t \ @@ -172,6 +184,16 @@ static int rpmsg_uevent(struct device *dev, struct kobj_uevent_env *env) rpdev->id.name); } +static const struct rpmsg_endpoint_ops virtio_endpoint_ops = { + .destroy_ept = virtio_rpmsg_destroy_ept, + .send = virtio_rpmsg_send, + .sendto = virtio_rpmsg_sendto, + .send_offchannel = virtio_rpmsg_send_offchannel, + .trysend = virtio_rpmsg_trysend, + .trysendto = virtio_rpmsg_trysendto, + .trysend_offchannel = virtio_rpmsg_trysend_offchannel, +}; + /** * __ept_release() - deallocate an rpmsg endpoint * @kref: the ept's reference count @@ -212,6 +234,7 @@ static struct rpmsg_endpoint *__rpmsg_create_ept(struct virtproc_info *vrp, ept->rpdev = rpdev; ept->cb = cb; ept->priv = priv; + ept->ops = &virtio_endpoint_ops; /* do we need to allocate a local address ? */ if (addr == RPMSG_ADDR_ANY) { @@ -285,10 +308,15 @@ __rpmsg_destroy_ept(struct virtproc_info *vrp, struct rpmsg_endpoint *ept) */ void rpmsg_destroy_ept(struct rpmsg_endpoint *ept) { - __rpmsg_destroy_ept(ept->rpdev->vrp, ept); + ept->ops->destroy_ept(ept); } EXPORT_SYMBOL(rpmsg_destroy_ept); +static void virtio_rpmsg_destroy_ept(struct rpmsg_endpoint *ept) +{ + __rpmsg_destroy_ept(ept->rpdev->vrp, ept); +} + /* * when an rpmsg driver is probed with a channel, we seamlessly create * it an endpoint, binding its rx callback to a unique local rpmsg @@ -657,8 +685,9 @@ static void rpmsg_downref_sleepers(struct virtproc_info *vrp) * * Returns 0 on success and an appropriate error value on failure. */ -int rpmsg_send_offchannel_raw(struct rpmsg_device *rpdev, u32 src, u32 dst, - void *data, int len, bool wait) +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 device *dev = &rpdev->dev; @@ -754,6 +783,56 @@ out: } EXPORT_SYMBOL(rpmsg_send_offchannel_raw); +static int virtio_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); +} + +static int virtio_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); +} + +static int virtio_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); +} + +static int virtio_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); +} + +static int virtio_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); +} + +static int virtio_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); +} + static int rpmsg_recv_single(struct virtproc_info *vrp, struct device *dev, struct rpmsg_hdr *msg, unsigned int len) { diff --git a/include/linux/rpmsg.h b/include/linux/rpmsg.h index 9fdcfc7..d54458e 100644 --- a/include/linux/rpmsg.h +++ b/include/linux/rpmsg.h @@ -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 */ -- 2.7.4