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Message-ID: <b39274f7-5fe3-1b7a-df54-26990e7a62bf@st.com>
Date: Tue, 20 Oct 2020 09:05:35 +0200
From: Arnaud POULIQUEN <arnaud.pouliquen@...com>
To: Mathieu Poirier <mathieu.poirier@...aro.org>,
"ohad@...ery.com" <ohad@...ery.com>,
"bjorn.andersson@...aro.org" <bjorn.andersson@...aro.org>
CC: "guennadi.liakhovetski@...ux.intel.com"
<guennadi.liakhovetski@...ux.intel.com>,
"linux-remoteproc@...r.kernel.org" <linux-remoteproc@...r.kernel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3 2/8] rpmsg: virtio: Move from virtio to rpmsg byte
conversion
On 10/19/20 10:34 PM, Mathieu Poirier wrote:
> 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@...aro.org>
Reviewed-by: Arnaud Pouliquen <arnaud.pouliquen@...com>
Thanks,
Arnaud
> ---
> drivers/rpmsg/virtio_rpmsg_bus.c | 53 +++++++++++++++++---------------
> 1 file changed, 28 insertions(+), 25 deletions(-)
>
> diff --git a/drivers/rpmsg/virtio_rpmsg_bus.c b/drivers/rpmsg/virtio_rpmsg_bus.c
> index 9006fc7f73d0..8927bcad56fd 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;
>
> /**
> @@ -336,8 +336,8 @@ 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 +360,8 @@ 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)
> @@ -420,6 +420,7 @@ static struct rpmsg_device *rpmsg_create_channel(struct virtproc_info *vrp,
> rpdev->src = chinfo->src;
> rpdev->dst = chinfo->dst;
> rpdev->ops = &virtio_rpmsg_ops;
> + rpdev->little_endian = virtio_is_little_endian(vrp->vdev);
>
> /*
> * rpmsg server channels has predefined local address (for now),
> @@ -613,10 +614,10 @@ 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 +706,15 @@ 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 = virtio_is_little_endian(vrp->vdev);
> + 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 +733,7 @@ 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 +747,7 @@ 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);
>
> @@ -825,6 +827,7 @@ static int rpmsg_ns_cb(struct rpmsg_device *rpdev, void *data, int len,
> struct rpmsg_channel_info chinfo;
> struct virtproc_info *vrp = priv;
> struct device *dev = &vrp->vdev->dev;
> + bool little_endian = virtio_is_little_endian(vrp->vdev);
> int ret;
>
> #if defined(CONFIG_DYNAMIC_DEBUG)
> @@ -853,13 +856,13 @@ 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(little_endian, 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(little_endian, 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(little_endian, 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);
>
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