diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/rpmsg.h | 248 |
1 files changed, 35 insertions, 213 deletions
diff --git a/include/linux/rpmsg.h b/include/linux/rpmsg.h index ada50ff..452d393 100644 --- a/include/linux/rpmsg.h +++ b/include/linux/rpmsg.h @@ -41,65 +41,27 @@ #include <linux/kref.h> #include <linux/mutex.h> -/* The feature bitmap for virtio rpmsg */ -#define VIRTIO_RPMSG_F_NS 0 /* RP supports name service notifications */ +#define RPMSG_ADDR_ANY 0xFFFFFFFF + +struct rpmsg_device; +struct rpmsg_endpoint; +struct rpmsg_device_ops; +struct rpmsg_endpoint_ops; /** - * struct rpmsg_hdr - common header for all rpmsg messages - * @src: source address + * struct rpmsg_channel_info - channel info representation + * @name: name of service + * @src: local address * @dst: destination address - * @reserved: reserved for future use - * @len: length of payload (in bytes) - * @flags: message flags - * @data: @len bytes of message payload data - * - * Every message sent(/received) on the rpmsg bus begins with this header. */ -struct rpmsg_hdr { +struct rpmsg_channel_info { + char name[RPMSG_NAME_SIZE]; u32 src; u32 dst; - u32 reserved; - u16 len; - u16 flags; - u8 data[0]; -} __packed; - -/** - * struct rpmsg_ns_msg - dynamic name service announcement message - * @name: name of remote service that is published - * @addr: address of remote service that is published - * @flags: indicates whether service is created or destroyed - * - * This message is sent across to publish a new service, or announce - * about its removal. When we receive these messages, an appropriate - * rpmsg channel (i.e device) is created/destroyed. In turn, the ->probe() - * or ->remove() handler of the appropriate rpmsg driver will be invoked - * (if/as-soon-as one is registered). - */ -struct rpmsg_ns_msg { - char name[RPMSG_NAME_SIZE]; - u32 addr; - u32 flags; -} __packed; - -/** - * enum rpmsg_ns_flags - dynamic name service announcement flags - * - * @RPMSG_NS_CREATE: a new remote service was just created - * @RPMSG_NS_DESTROY: a known remote service was just destroyed - */ -enum rpmsg_ns_flags { - RPMSG_NS_CREATE = 0, - RPMSG_NS_DESTROY = 1, }; -#define RPMSG_ADDR_ANY 0xFFFFFFFF - -struct virtproc_info; - /** - * rpmsg_channel - devices that belong to the rpmsg bus are called channels - * @vrp: the remote processor this channel belongs to + * rpmsg_device - device that belong to the rpmsg bus * @dev: the device struct * @id: device id (used to match between rpmsg drivers and devices) * @src: local address @@ -107,17 +69,18 @@ struct virtproc_info; * @ept: the rpmsg endpoint of this channel * @announce: if set, rpmsg will announce the creation/removal of this channel */ -struct rpmsg_channel { - struct virtproc_info *vrp; +struct rpmsg_device { struct device dev; struct rpmsg_device_id id; u32 src; u32 dst; struct rpmsg_endpoint *ept; bool announce; + + const struct rpmsg_device_ops *ops; }; -typedef void (*rpmsg_rx_cb_t)(struct rpmsg_channel *, void *, int, void *, u32); +typedef int (*rpmsg_rx_cb_t)(struct rpmsg_device *, void *, int, void *, u32); /** * struct rpmsg_endpoint - binds a local rpmsg address to its user @@ -143,12 +106,14 @@ typedef void (*rpmsg_rx_cb_t)(struct rpmsg_channel *, void *, int, void *, u32); * create additional endpoints by themselves (see rpmsg_create_ept()). */ struct rpmsg_endpoint { - struct rpmsg_channel *rpdev; + struct rpmsg_device *rpdev; struct kref refcount; rpmsg_rx_cb_t cb; struct mutex cb_lock; u32 addr; void *priv; + + const struct rpmsg_endpoint_ops *ops; }; /** @@ -162,20 +127,19 @@ struct rpmsg_endpoint { struct rpmsg_driver { struct device_driver drv; const struct rpmsg_device_id *id_table; - int (*probe)(struct rpmsg_channel *dev); - void (*remove)(struct rpmsg_channel *dev); - void (*callback)(struct rpmsg_channel *, void *, int, void *, u32); + int (*probe)(struct rpmsg_device *dev); + void (*remove)(struct rpmsg_device *dev); + int (*callback)(struct rpmsg_device *, void *, int, void *, u32); }; -int register_rpmsg_device(struct rpmsg_channel *dev); -void unregister_rpmsg_device(struct rpmsg_channel *dev); +int register_rpmsg_device(struct rpmsg_device *dev); +void unregister_rpmsg_device(struct rpmsg_device *dev); int __register_rpmsg_driver(struct rpmsg_driver *drv, struct module *owner); void unregister_rpmsg_driver(struct rpmsg_driver *drv); void rpmsg_destroy_ept(struct rpmsg_endpoint *); -struct rpmsg_endpoint *rpmsg_create_ept(struct rpmsg_channel *, - rpmsg_rx_cb_t cb, void *priv, u32 addr); -int -rpmsg_send_offchannel_raw(struct rpmsg_channel *, u32, u32, void *, int, bool); +struct rpmsg_endpoint *rpmsg_create_ept(struct rpmsg_device *, + rpmsg_rx_cb_t cb, void *priv, + struct rpmsg_channel_info chinfo); /* use a macro to avoid include chaining to get THIS_MODULE */ #define register_rpmsg_driver(drv) \ @@ -193,156 +157,14 @@ rpmsg_send_offchannel_raw(struct rpmsg_channel *, u32, u32, void *, int, bool); module_driver(__rpmsg_driver, register_rpmsg_driver, \ unregister_rpmsg_driver) -/** - * rpmsg_send() - send a message across to the remote processor - * @rpdev: the rpmsg channel - * @data: payload of message - * @len: length of payload - * - * This function sends @data of length @len on the @rpdev channel. - * The message will be sent to the remote processor which the @rpdev - * channel belongs to, using @rpdev's source and destination addresses. - * In case there are no TX buffers available, the function will block until - * one becomes available, or a timeout of 15 seconds elapses. When the latter - * happens, -ERESTARTSYS is returned. - * - * Can only be called from process context (for now). - * - * Returns 0 on success and an appropriate error value on failure. - */ -static inline int rpmsg_send(struct rpmsg_channel *rpdev, void *data, int len) -{ - u32 src = rpdev->src, dst = rpdev->dst; - - return rpmsg_send_offchannel_raw(rpdev, src, dst, data, len, true); -} - -/** - * rpmsg_sendto() - send a message across to the remote processor, specify dst - * @rpdev: the rpmsg channel - * @data: payload of message - * @len: length of payload - * @dst: destination address - * - * This function sends @data of length @len to the remote @dst address. - * The message will be sent to the remote processor which the @rpdev - * channel belongs to, using @rpdev's source address. - * In case there are no TX buffers available, the function will block until - * one becomes available, or a timeout of 15 seconds elapses. When the latter - * happens, -ERESTARTSYS is returned. - * - * Can only be called from process context (for now). - * - * Returns 0 on success and an appropriate error value on failure. - */ -static inline -int rpmsg_sendto(struct rpmsg_channel *rpdev, void *data, int len, u32 dst) -{ - u32 src = rpdev->src; - - return rpmsg_send_offchannel_raw(rpdev, src, dst, data, len, true); -} - -/** - * rpmsg_send_offchannel() - send a message using explicit src/dst addresses - * @rpdev: the rpmsg channel - * @src: source address - * @dst: destination address - * @data: payload of message - * @len: length of payload - * - * This function sends @data of length @len to the remote @dst address, - * and uses @src as the source address. - * The message will be sent to the remote processor which the @rpdev - * channel belongs to. - * In case there are no TX buffers available, the function will block until - * one becomes available, or a timeout of 15 seconds elapses. When the latter - * happens, -ERESTARTSYS is returned. - * - * Can only be called from process context (for now). - * - * Returns 0 on success and an appropriate error value on failure. - */ -static inline -int rpmsg_send_offchannel(struct rpmsg_channel *rpdev, u32 src, u32 dst, - void *data, int len) -{ - return rpmsg_send_offchannel_raw(rpdev, src, dst, data, len, true); -} - -/** - * rpmsg_send() - send a message across to the remote processor - * @rpdev: the rpmsg channel - * @data: payload of message - * @len: length of payload - * - * This function sends @data of length @len on the @rpdev channel. - * The message will be sent to the remote processor which the @rpdev - * channel belongs to, using @rpdev's source and destination addresses. - * In case there are no TX buffers available, the function will immediately - * return -ENOMEM without waiting until one becomes available. - * - * Can only be called from process context (for now). - * - * Returns 0 on success and an appropriate error value on failure. - */ -static inline -int rpmsg_trysend(struct rpmsg_channel *rpdev, void *data, int len) -{ - u32 src = rpdev->src, dst = rpdev->dst; +int rpmsg_send(struct rpmsg_endpoint *ept, void *data, int len); +int rpmsg_sendto(struct rpmsg_endpoint *ept, void *data, int len, u32 dst); +int rpmsg_send_offchannel(struct rpmsg_endpoint *ept, u32 src, u32 dst, + void *data, int len); - return rpmsg_send_offchannel_raw(rpdev, src, dst, data, len, false); -} - -/** - * rpmsg_sendto() - send a message across to the remote processor, specify dst - * @rpdev: the rpmsg channel - * @data: payload of message - * @len: length of payload - * @dst: destination address - * - * This function sends @data of length @len to the remote @dst address. - * The message will be sent to the remote processor which the @rpdev - * channel belongs to, using @rpdev's source address. - * In case there are no TX buffers available, the function will immediately - * return -ENOMEM without waiting until one becomes available. - * - * Can only be called from process context (for now). - * - * Returns 0 on success and an appropriate error value on failure. - */ -static inline -int rpmsg_trysendto(struct rpmsg_channel *rpdev, void *data, int len, u32 dst) -{ - u32 src = rpdev->src; - - return rpmsg_send_offchannel_raw(rpdev, src, dst, data, len, false); -} - -/** - * rpmsg_send_offchannel() - send a message using explicit src/dst addresses - * @rpdev: the rpmsg channel - * @src: source address - * @dst: destination address - * @data: payload of message - * @len: length of payload - * - * This function sends @data of length @len to the remote @dst address, - * and uses @src as the source address. - * The message will be sent to the remote processor which the @rpdev - * channel belongs to. - * In case there are no TX buffers available, the function will immediately - * return -ENOMEM without waiting until one becomes available. - * - * Can only be called from process context (for now). - * - * Returns 0 on success and an appropriate error value on failure. - */ -static inline -int rpmsg_trysend_offchannel(struct rpmsg_channel *rpdev, u32 src, u32 dst, - void *data, int len) -{ - return rpmsg_send_offchannel_raw(rpdev, src, dst, data, len, false); -} +int rpmsg_trysend(struct rpmsg_endpoint *ept, void *data, int len); +int rpmsg_trysendto(struct rpmsg_endpoint *ept, void *data, int len, u32 dst); +int rpmsg_trysend_offchannel(struct rpmsg_endpoint *ept, u32 src, u32 dst, + void *data, int len); #endif /* _LINUX_RPMSG_H */ |
