[PATCH v2 3/9] rpmsg: virtio: Move from virtio to rpmsg byte conversion
From: Mathieu Poirier
Date: Wed Oct 14 2020 - 05:22:00 EST
Use rpmsg byte conversion functions in order for the RPMSG
headers and generic functions to be used by external entities.
Signed-off-by: Mathieu Poirier <mathieu.poirier@xxxxxxxxxx>
---
drivers/rpmsg/virtio_rpmsg_bus.c | 60 +++++++++++++++++++-------------
1 file changed, 35 insertions(+), 25 deletions(-)
diff --git a/drivers/rpmsg/virtio_rpmsg_bus.c b/drivers/rpmsg/virtio_rpmsg_bus.c
index 9006fc7f73d0..793fe924671f 100644
--- a/drivers/rpmsg/virtio_rpmsg_bus.c
+++ b/drivers/rpmsg/virtio_rpmsg_bus.c
@@ -19,11 +19,11 @@
#include <linux/mutex.h>
#include <linux/of_device.h>
#include <linux/rpmsg.h>
+#include <linux/rpmsg_byteorder.h>
#include <linux/scatterlist.h>
#include <linux/slab.h>
#include <linux/sched.h>
#include <linux/virtio.h>
-#include <linux/virtio_byteorder.h>
#include <linux/virtio_ids.h>
#include <linux/virtio_config.h>
#include <linux/wait.h>
@@ -85,11 +85,11 @@ struct virtproc_info {
* Every message sent(/received) on the rpmsg bus begins with this header.
*/
struct rpmsg_hdr {
- __virtio32 src;
- __virtio32 dst;
- __virtio32 reserved;
- __virtio16 len;
- __virtio16 flags;
+ __rpmsg32 src;
+ __rpmsg32 dst;
+ __rpmsg32 reserved;
+ __rpmsg16 len;
+ __rpmsg16 flags;
u8 data[];
} __packed;
@@ -107,8 +107,8 @@ struct rpmsg_hdr {
*/
struct rpmsg_ns_msg {
char name[RPMSG_NAME_SIZE];
- __virtio32 addr;
- __virtio32 flags;
+ __rpmsg32 addr;
+ __rpmsg32 flags;
} __packed;
/**
@@ -280,6 +280,14 @@ static struct rpmsg_endpoint *__rpmsg_create_ept(struct virtproc_info *vrp,
return NULL;
}
+static bool virtio_rpmsg_is_little_endian(struct rpmsg_device *rpdev)
+{
+ struct virtio_rpmsg_channel *vch = to_virtio_rpmsg_channel(rpdev);
+ struct virtproc_info *vrp = vch->vrp;
+
+ return virtio_is_little_endian(vrp->vdev);
+}
+
static struct rpmsg_endpoint *virtio_rpmsg_create_ept(struct rpmsg_device *rpdev,
rpmsg_rx_cb_t cb,
void *priv,
@@ -336,8 +344,8 @@ static int virtio_rpmsg_announce_create(struct rpmsg_device *rpdev)
struct rpmsg_ns_msg nsm;
strncpy(nsm.name, rpdev->id.name, RPMSG_NAME_SIZE);
- nsm.addr = cpu_to_virtio32(vrp->vdev, rpdev->ept->addr);
- nsm.flags = cpu_to_virtio32(vrp->vdev, RPMSG_NS_CREATE);
+ nsm.addr = cpu_to_rpmsg32(rpdev, rpdev->ept->addr);
+ nsm.flags = cpu_to_rpmsg32(rpdev, RPMSG_NS_CREATE);
err = rpmsg_sendto(rpdev->ept, &nsm, sizeof(nsm), RPMSG_NS_ADDR);
if (err)
@@ -360,8 +368,8 @@ static int virtio_rpmsg_announce_destroy(struct rpmsg_device *rpdev)
struct rpmsg_ns_msg nsm;
strncpy(nsm.name, rpdev->id.name, RPMSG_NAME_SIZE);
- nsm.addr = cpu_to_virtio32(vrp->vdev, rpdev->ept->addr);
- nsm.flags = cpu_to_virtio32(vrp->vdev, RPMSG_NS_DESTROY);
+ nsm.addr = cpu_to_rpmsg32(rpdev, rpdev->ept->addr);
+ nsm.flags = cpu_to_rpmsg32(rpdev, RPMSG_NS_DESTROY);
err = rpmsg_sendto(rpdev->ept, &nsm, sizeof(nsm), RPMSG_NS_ADDR);
if (err)
@@ -372,6 +380,7 @@ static int virtio_rpmsg_announce_destroy(struct rpmsg_device *rpdev)
}
static const struct rpmsg_device_ops virtio_rpmsg_ops = {
+ .is_little_endian = virtio_rpmsg_is_little_endian,
.create_ept = virtio_rpmsg_create_ept,
.announce_create = virtio_rpmsg_announce_create,
.announce_destroy = virtio_rpmsg_announce_destroy,
@@ -613,10 +622,10 @@ static int rpmsg_send_offchannel_raw(struct rpmsg_device *rpdev,
}
}
- msg->len = cpu_to_virtio16(vrp->vdev, len);
+ msg->len = cpu_to_rpmsg16(rpdev, len);
msg->flags = 0;
- msg->src = cpu_to_virtio32(vrp->vdev, src);
- msg->dst = cpu_to_virtio32(vrp->vdev, dst);
+ msg->src = cpu_to_rpmsg32(rpdev, src);
+ msg->dst = cpu_to_rpmsg32(rpdev, dst);
msg->reserved = 0;
memcpy(msg->data, data, len);
@@ -705,14 +714,15 @@ static int rpmsg_recv_single(struct virtproc_info *vrp, struct device *dev,
{
struct rpmsg_endpoint *ept;
struct scatterlist sg;
- unsigned int msg_len = virtio16_to_cpu(vrp->vdev, msg->len);
+ bool little_endian = rpmsg_is_little_endian();
+ unsigned int msg_len = __rpmsg16_to_cpu(little_endian, msg->len);
int err;
dev_dbg(dev, "From: 0x%x, To: 0x%x, Len: %d, Flags: %d, Reserved: %d\n",
- virtio32_to_cpu(vrp->vdev, msg->src),
- virtio32_to_cpu(vrp->vdev, msg->dst), msg_len,
- virtio16_to_cpu(vrp->vdev, msg->flags),
- virtio32_to_cpu(vrp->vdev, msg->reserved));
+ __rpmsg32_to_cpu(little_endian, msg->src),
+ __rpmsg32_to_cpu(little_endian, msg->dst), msg_len,
+ __rpmsg16_to_cpu(little_endian, msg->flags),
+ __rpmsg32_to_cpu(little_endian, msg->reserved));
#if defined(CONFIG_DYNAMIC_DEBUG)
dynamic_hex_dump("rpmsg_virtio RX: ", DUMP_PREFIX_NONE, 16, 1,
msg, sizeof(*msg) + msg_len, true);
@@ -731,7 +741,7 @@ static int rpmsg_recv_single(struct virtproc_info *vrp, struct device *dev,
/* use the dst addr to fetch the callback of the appropriate user */
mutex_lock(&vrp->endpoints_lock);
- ept = idr_find(&vrp->endpoints, virtio32_to_cpu(vrp->vdev, msg->dst));
+ ept = idr_find(&vrp->endpoints, __rpmsg32_to_cpu(little_endian, msg->dst));
/* let's make sure no one deallocates ept while we use it */
if (ept)
@@ -745,7 +755,7 @@ static int rpmsg_recv_single(struct virtproc_info *vrp, struct device *dev,
if (ept->cb)
ept->cb(ept->rpdev, msg->data, msg_len, ept->priv,
- virtio32_to_cpu(vrp->vdev, msg->src));
+ __rpmsg32_to_cpu(little_endian, msg->src));
mutex_unlock(&ept->cb_lock);
@@ -853,13 +863,13 @@ static int rpmsg_ns_cb(struct rpmsg_device *rpdev, void *data, int len,
strncpy(chinfo.name, msg->name, sizeof(chinfo.name));
chinfo.src = RPMSG_ADDR_ANY;
- chinfo.dst = virtio32_to_cpu(vrp->vdev, msg->addr);
+ chinfo.dst = rpmsg32_to_cpu(rpdev, msg->addr);
dev_info(dev, "%sing channel %s addr 0x%x\n",
- virtio32_to_cpu(vrp->vdev, msg->flags) & RPMSG_NS_DESTROY ?
+ rpmsg32_to_cpu(rpdev, msg->flags) & RPMSG_NS_DESTROY ?
"destroy" : "creat", msg->name, chinfo.dst);
- if (virtio32_to_cpu(vrp->vdev, msg->flags) & RPMSG_NS_DESTROY) {
+ if (rpmsg32_to_cpu(rpdev, msg->flags) & RPMSG_NS_DESTROY) {
ret = rpmsg_unregister_device(&vrp->vdev->dev, &chinfo);
if (ret)
dev_err(dev, "rpmsg_destroy_channel failed: %d\n", ret);
--
2.25.1