diff options
| -rw-r--r-- | include/linux/rpmsg.h | 51 | ||||
| -rw-r--r-- | include/linux/rpmsg/byteorder.h | 67 | ||||
| -rw-r--r-- | include/uapi/linux/rpmsg_types.h | 11 |
3 files changed, 129 insertions, 0 deletions
diff --git a/include/linux/rpmsg.h b/include/linux/rpmsg.h index 9fe156d1c018..faf2daff6238 100644 --- a/include/linux/rpmsg.h +++ b/include/linux/rpmsg.h @@ -17,6 +17,7 @@ #include <linux/kref.h> #include <linux/mutex.h> #include <linux/poll.h> +#include <linux/rpmsg/byteorder.h> #define RPMSG_ADDR_ANY 0xFFFFFFFF @@ -46,6 +47,7 @@ struct rpmsg_channel_info { * @dst: destination address * @ept: the rpmsg endpoint of this channel * @announce: if set, rpmsg will announce the creation/removal of this channel + * @little_endian: True if transport is using little endian byte representation */ struct rpmsg_device { struct device dev; @@ -55,6 +57,7 @@ struct rpmsg_device { u32 dst; struct rpmsg_endpoint *ept; bool announce; + bool little_endian; const struct rpmsg_device_ops *ops; }; @@ -111,6 +114,54 @@ struct rpmsg_driver { int (*callback)(struct rpmsg_device *, void *, int, void *, u32); }; +static inline u16 rpmsg16_to_cpu(struct rpmsg_device *rpdev, __rpmsg16 val) +{ + if (!rpdev) + return __rpmsg16_to_cpu(rpmsg_is_little_endian(), val); + else + return __rpmsg16_to_cpu(rpdev->little_endian, val); +} + +static inline __rpmsg16 cpu_to_rpmsg16(struct rpmsg_device *rpdev, u16 val) +{ + if (!rpdev) + return __cpu_to_rpmsg16(rpmsg_is_little_endian(), val); + else + return __cpu_to_rpmsg16(rpdev->little_endian, val); +} + +static inline u32 rpmsg32_to_cpu(struct rpmsg_device *rpdev, __rpmsg32 val) +{ + if (!rpdev) + return __rpmsg32_to_cpu(rpmsg_is_little_endian(), val); + else + return __rpmsg32_to_cpu(rpdev->little_endian, val); +} + +static inline __rpmsg32 cpu_to_rpmsg32(struct rpmsg_device *rpdev, u32 val) +{ + if (!rpdev) + return __cpu_to_rpmsg32(rpmsg_is_little_endian(), val); + else + return __cpu_to_rpmsg32(rpdev->little_endian, val); +} + +static inline u64 rpmsg64_to_cpu(struct rpmsg_device *rpdev, __rpmsg64 val) +{ + if (!rpdev) + return __rpmsg64_to_cpu(rpmsg_is_little_endian(), val); + else + return __rpmsg64_to_cpu(rpdev->little_endian, val); +} + +static inline __rpmsg64 cpu_to_rpmsg64(struct rpmsg_device *rpdev, u64 val) +{ + if (!rpdev) + return __cpu_to_rpmsg64(rpmsg_is_little_endian(), val); + else + return __cpu_to_rpmsg64(rpdev->little_endian, val); +} + #if IS_ENABLED(CONFIG_RPMSG) int register_rpmsg_device(struct rpmsg_device *dev); diff --git a/include/linux/rpmsg/byteorder.h b/include/linux/rpmsg/byteorder.h new file mode 100644 index 000000000000..c0f565dbad6d --- /dev/null +++ b/include/linux/rpmsg/byteorder.h @@ -0,0 +1,67 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Follows implementation found in linux/virtio_byteorder.h + */ +#ifndef _LINUX_RPMSG_BYTEORDER_H +#define _LINUX_RPMSG_BYTEORDER_H +#include <linux/types.h> +#include <uapi/linux/rpmsg_types.h> + +static inline bool rpmsg_is_little_endian(void) +{ +#ifdef __LITTLE_ENDIAN + return true; +#else + return false; +#endif +} + +static inline u16 __rpmsg16_to_cpu(bool little_endian, __rpmsg16 val) +{ + if (little_endian) + return le16_to_cpu((__force __le16)val); + else + return be16_to_cpu((__force __be16)val); +} + +static inline __rpmsg16 __cpu_to_rpmsg16(bool little_endian, u16 val) +{ + if (little_endian) + return (__force __rpmsg16)cpu_to_le16(val); + else + return (__force __rpmsg16)cpu_to_be16(val); +} + +static inline u32 __rpmsg32_to_cpu(bool little_endian, __rpmsg32 val) +{ + if (little_endian) + return le32_to_cpu((__force __le32)val); + else + return be32_to_cpu((__force __be32)val); +} + +static inline __rpmsg32 __cpu_to_rpmsg32(bool little_endian, u32 val) +{ + if (little_endian) + return (__force __rpmsg32)cpu_to_le32(val); + else + return (__force __rpmsg32)cpu_to_be32(val); +} + +static inline u64 __rpmsg64_to_cpu(bool little_endian, __rpmsg64 val) +{ + if (little_endian) + return le64_to_cpu((__force __le64)val); + else + return be64_to_cpu((__force __be64)val); +} + +static inline __rpmsg64 __cpu_to_rpmsg64(bool little_endian, u64 val) +{ + if (little_endian) + return (__force __rpmsg64)cpu_to_le64(val); + else + return (__force __rpmsg64)cpu_to_be64(val); +} + +#endif /* _LINUX_RPMSG_BYTEORDER_H */ diff --git a/include/uapi/linux/rpmsg_types.h b/include/uapi/linux/rpmsg_types.h new file mode 100644 index 000000000000..36e3b9404391 --- /dev/null +++ b/include/uapi/linux/rpmsg_types.h @@ -0,0 +1,11 @@ +/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ +#ifndef _UAPI_LINUX_RPMSG_TYPES_H +#define _UAPI_LINUX_RPMSG_TYPES_H + +#include <linux/types.h> + +typedef __u16 __bitwise __rpmsg16; +typedef __u32 __bitwise __rpmsg32; +typedef __u64 __bitwise __rpmsg64; + +#endif /* _UAPI_LINUX_RPMSG_TYPES_H */ |