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rpmsg: Introduce __rpmsg{16|32|64} types

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Introduce __rpmsg{16|32|64} types along with byte order conversion
functions based on an rpmsg_device operation as a foundation to
make RPMSG modular and transport agnostic.

Tested-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>
Suggested-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Reviewed-by: Arnaud Pouliquen <arnaud.pouliquen@st.com>
Reviewed-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>
Link: https://lore.kernel.org/r/20201120214245.172963-2-mathieu.poirier@linaro.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
This commit is contained in:
Mathieu Poirier
2020-11-20 14:42:38 -07:00
committed by Bjorn Andersson
parent 3650b228f8
commit 6bef038011
3 changed files with 129 additions and 0 deletions
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51
include/linux/rpmsg.h
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@@ -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);