| Message ID | 20200608123932.GF10562@ubuntu (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | rpmsg: virtio: add endianness conversions | expand |
On Mon, Jun 08, 2020 at 02:39:32PM +0200, Guennadi Liakhovetski wrote: > According to the VirtIO 1.0 spec data, sent over virtual queues must > be in little-endian format. Update the RPMsg VirtIO implementation > to enforce that. > > Suggested-by: Michael S. Tsirkin <mst@redhat.com> > Signed-off-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com> > --- > drivers/rpmsg/virtio_rpmsg_bus.c | 61 ++++++++++++++++++++++------------------ > 1 file changed, 33 insertions(+), 28 deletions(-) > > diff --git a/drivers/rpmsg/virtio_rpmsg_bus.c b/drivers/rpmsg/virtio_rpmsg_bus.c > index 07d4f33..b8ff42b 100644 > --- a/drivers/rpmsg/virtio_rpmsg_bus.c > +++ b/drivers/rpmsg/virtio_rpmsg_bus.c > @@ -11,6 +11,8 @@ > > #define pr_fmt(fmt) "%s: " fmt, __func__ > > +#include <asm/byteorder.h> > + > #include <linux/dma-mapping.h> > #include <linux/idr.h> > #include <linux/jiffies.h> > @@ -22,6 +24,7 @@ > #include <linux/scatterlist.h> > #include <linux/slab.h> > #include <linux/sched.h> > +#include <linux/types.h> > #include <linux/virtio.h> > #include <linux/virtio_ids.h> > #include <linux/virtio_config.h> > @@ -84,11 +87,11 @@ struct virtproc_info { > * Every message sent(/received) on the rpmsg bus begins with this header. > */ > struct rpmsg_hdr { > - u32 src; > - u32 dst; > - u32 reserved; > - u16 len; > - u16 flags; > + __le32 src; > + __le32 dst; > + __le32 reserved; > + __le16 len; > + __le16 flags; > u8 data[]; > } __packed; > I really has __virtio32/virtio16 types in mind. This way existing BE setups (if any!) can keep working. However if RPMSG maintainers want this, that's also fine by me ... > @@ -106,8 +109,8 @@ struct rpmsg_hdr { > */ > struct rpmsg_ns_msg { > char name[RPMSG_NAME_SIZE]; > - u32 addr; > - u32 flags; > + __le32 addr; > + __le32 flags; > } __packed; > > /** > @@ -335,8 +338,8 @@ 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 = rpdev->ept->addr; > - nsm.flags = RPMSG_NS_CREATE; > + nsm.addr = cpu_to_le32(rpdev->ept->addr); > + nsm.flags = cpu_to_le32(RPMSG_NS_CREATE); > > err = rpmsg_sendto(rpdev->ept, &nsm, sizeof(nsm), RPMSG_NS_ADDR); > if (err) > @@ -359,8 +362,8 @@ 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 = rpdev->ept->addr; > - nsm.flags = RPMSG_NS_DESTROY; > + nsm.addr = cpu_to_le32(rpdev->ept->addr); > + nsm.flags = cpu_to_le32(RPMSG_NS_DESTROY); > > err = rpmsg_sendto(rpdev->ept, &nsm, sizeof(nsm), RPMSG_NS_ADDR); > if (err) > @@ -612,15 +615,15 @@ static int rpmsg_send_offchannel_raw(struct rpmsg_device *rpdev, > } > } > > - msg->len = len; > + msg->len = cpu_to_le16(len); > msg->flags = 0; > - msg->src = src; > - msg->dst = dst; > + msg->src = cpu_to_le32(src); > + msg->dst = cpu_to_le32(dst); > msg->reserved = 0; > memcpy(msg->data, data, len); > > dev_dbg(dev, "TX From 0x%x, To 0x%x, Len %d, Flags %d, Reserved %d\n", > - msg->src, msg->dst, msg->len, msg->flags, msg->reserved); > + src, dst, len, msg->flags, msg->reserved); > #if defined(CONFIG_DYNAMIC_DEBUG) > dynamic_hex_dump("rpmsg_virtio TX: ", DUMP_PREFIX_NONE, 16, 1, > msg, sizeof(*msg) + msg->len, true); > @@ -704,13 +707,15 @@ static int rpmsg_recv_single(struct virtproc_info *vrp, struct device *dev, > { > struct rpmsg_endpoint *ept; > struct scatterlist sg; > + unsigned int msg_len = le16_to_cpu(msg->len); > int err; > > dev_dbg(dev, "From: 0x%x, To: 0x%x, Len: %d, Flags: %d, Reserved: %d\n", > - msg->src, msg->dst, msg->len, msg->flags, msg->reserved); > + le32_to_cpu(msg->src), le32_to_cpu(msg->dst), msg_len, > + le16_to_cpu(msg->flags), le32_to_cpu(msg->reserved)); > #if defined(CONFIG_DYNAMIC_DEBUG) > dynamic_hex_dump("rpmsg_virtio RX: ", DUMP_PREFIX_NONE, 16, 1, > - msg, sizeof(*msg) + msg->len, true); > + msg, sizeof(*msg) + msg_len, true); > #endif > > /* > @@ -718,15 +723,15 @@ static int rpmsg_recv_single(struct virtproc_info *vrp, struct device *dev, > * the reported payload length. > */ > if (len > vrp->buf_size || > - msg->len > (len - sizeof(struct rpmsg_hdr))) { > - dev_warn(dev, "inbound msg too big: (%d, %d)\n", len, msg->len); > + msg_len > (len - sizeof(struct rpmsg_hdr))) { > + dev_warn(dev, "inbound msg too big: (%d, %d)\n", len, msg_len); > return -EINVAL; > } > > /* use the dst addr to fetch the callback of the appropriate user */ > mutex_lock(&vrp->endpoints_lock); > > - ept = idr_find(&vrp->endpoints, msg->dst); > + ept = idr_find(&vrp->endpoints, le32_to_cpu(msg->dst)); > > /* let's make sure no one deallocates ept while we use it */ > if (ept) > @@ -739,8 +744,8 @@ static int rpmsg_recv_single(struct virtproc_info *vrp, struct device *dev, > mutex_lock(&ept->cb_lock); > > if (ept->cb) > - ept->cb(ept->rpdev, msg->data, msg->len, ept->priv, > - msg->src); > + ept->cb(ept->rpdev, msg->data, msg_len, ept->priv, > + le32_to_cpu(msg->src)); > > mutex_unlock(&ept->cb_lock); > > @@ -846,15 +851,15 @@ static int rpmsg_ns_cb(struct rpmsg_device *rpdev, void *data, int len, > /* don't trust the remote processor for null terminating the name */ > msg->name[RPMSG_NAME_SIZE - 1] = '\0'; > > - dev_info(dev, "%sing channel %s addr 0x%x\n", > - msg->flags & RPMSG_NS_DESTROY ? "destroy" : "creat", > - msg->name, msg->addr); > - > strncpy(chinfo.name, msg->name, sizeof(chinfo.name)); > chinfo.src = RPMSG_ADDR_ANY; > - chinfo.dst = msg->addr; > + chinfo.dst = le32_to_cpu(msg->addr); > + > + dev_info(dev, "%sing channel %s addr 0x%x\n", > + le32_to_cpu(msg->flags) & RPMSG_NS_DESTROY ? "destroy" : "creat", > + msg->name, chinfo.dst); > > - if (msg->flags & RPMSG_NS_DESTROY) { > + if (le32_to_cpu(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); > -- > 1.9.3
On Mon, Jun 08, 2020 at 02:39:32PM +0200, Guennadi Liakhovetski wrote: > According to the VirtIO 1.0 spec data, sent over virtual queues must > be in little-endian format. Update the RPMsg VirtIO implementation > to enforce that. > > Suggested-by: Michael S. Tsirkin <mst@redhat.com> > Signed-off-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com> > --- > drivers/rpmsg/virtio_rpmsg_bus.c | 61 ++++++++++++++++++++++------------------ > 1 file changed, 33 insertions(+), 28 deletions(-) > > diff --git a/drivers/rpmsg/virtio_rpmsg_bus.c b/drivers/rpmsg/virtio_rpmsg_bus.c > index 07d4f33..b8ff42b 100644 > --- a/drivers/rpmsg/virtio_rpmsg_bus.c > +++ b/drivers/rpmsg/virtio_rpmsg_bus.c > @@ -11,6 +11,8 @@ > > #define pr_fmt(fmt) "%s: " fmt, __func__ > > +#include <asm/byteorder.h> > + > #include <linux/dma-mapping.h> > #include <linux/idr.h> > #include <linux/jiffies.h> > @@ -22,6 +24,7 @@ > #include <linux/scatterlist.h> > #include <linux/slab.h> > #include <linux/sched.h> > +#include <linux/types.h> > #include <linux/virtio.h> > #include <linux/virtio_ids.h> > #include <linux/virtio_config.h> > @@ -84,11 +87,11 @@ struct virtproc_info { > * Every message sent(/received) on the rpmsg bus begins with this header. > */ > struct rpmsg_hdr { > - u32 src; > - u32 dst; > - u32 reserved; > - u16 len; > - u16 flags; > + __le32 src; > + __le32 dst; > + __le32 reserved; > + __le16 len; > + __le16 flags; > u8 data[]; > } __packed; > > @@ -106,8 +109,8 @@ struct rpmsg_hdr { > */ > struct rpmsg_ns_msg { > char name[RPMSG_NAME_SIZE]; > - u32 addr; > - u32 flags; > + __le32 addr; > + __le32 flags; > } __packed; > > /** > @@ -335,8 +338,8 @@ 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 = rpdev->ept->addr; > - nsm.flags = RPMSG_NS_CREATE; > + nsm.addr = cpu_to_le32(rpdev->ept->addr); > + nsm.flags = cpu_to_le32(RPMSG_NS_CREATE); So how will this work with existing firmware? > > err = rpmsg_sendto(rpdev->ept, &nsm, sizeof(nsm), RPMSG_NS_ADDR); > if (err) > @@ -359,8 +362,8 @@ 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 = rpdev->ept->addr; > - nsm.flags = RPMSG_NS_DESTROY; > + nsm.addr = cpu_to_le32(rpdev->ept->addr); > + nsm.flags = cpu_to_le32(RPMSG_NS_DESTROY); > > err = rpmsg_sendto(rpdev->ept, &nsm, sizeof(nsm), RPMSG_NS_ADDR); > if (err) > @@ -612,15 +615,15 @@ static int rpmsg_send_offchannel_raw(struct rpmsg_device *rpdev, > } > } > > - msg->len = len; > + msg->len = cpu_to_le16(len); > msg->flags = 0; > - msg->src = src; > - msg->dst = dst; > + msg->src = cpu_to_le32(src); > + msg->dst = cpu_to_le32(dst); > msg->reserved = 0; > memcpy(msg->data, data, len); > > dev_dbg(dev, "TX From 0x%x, To 0x%x, Len %d, Flags %d, Reserved %d\n", > - msg->src, msg->dst, msg->len, msg->flags, msg->reserved); > + src, dst, len, msg->flags, msg->reserved); > #if defined(CONFIG_DYNAMIC_DEBUG) > dynamic_hex_dump("rpmsg_virtio TX: ", DUMP_PREFIX_NONE, 16, 1, > msg, sizeof(*msg) + msg->len, true); > @@ -704,13 +707,15 @@ static int rpmsg_recv_single(struct virtproc_info *vrp, struct device *dev, > { > struct rpmsg_endpoint *ept; > struct scatterlist sg; > + unsigned int msg_len = le16_to_cpu(msg->len); And here too, along with everything else that follows? As Michael suggested using __virtioXY types would allow to use the virtioXY_to_cpu() and cpu_to_virtioXY() macros, which is definitely a step in the right direction. Thanks, Mathieu > int err; > > dev_dbg(dev, "From: 0x%x, To: 0x%x, Len: %d, Flags: %d, Reserved: %d\n", > - msg->src, msg->dst, msg->len, msg->flags, msg->reserved); > + le32_to_cpu(msg->src), le32_to_cpu(msg->dst), msg_len, > + le16_to_cpu(msg->flags), le32_to_cpu(msg->reserved)); > #if defined(CONFIG_DYNAMIC_DEBUG) > dynamic_hex_dump("rpmsg_virtio RX: ", DUMP_PREFIX_NONE, 16, 1, > - msg, sizeof(*msg) + msg->len, true); > + msg, sizeof(*msg) + msg_len, true); > #endif > > /* > @@ -718,15 +723,15 @@ static int rpmsg_recv_single(struct virtproc_info *vrp, struct device *dev, > * the reported payload length. > */ > if (len > vrp->buf_size || > - msg->len > (len - sizeof(struct rpmsg_hdr))) { > - dev_warn(dev, "inbound msg too big: (%d, %d)\n", len, msg->len); > + msg_len > (len - sizeof(struct rpmsg_hdr))) { > + dev_warn(dev, "inbound msg too big: (%d, %d)\n", len, msg_len); > return -EINVAL; > } > > /* use the dst addr to fetch the callback of the appropriate user */ > mutex_lock(&vrp->endpoints_lock); > > - ept = idr_find(&vrp->endpoints, msg->dst); > + ept = idr_find(&vrp->endpoints, le32_to_cpu(msg->dst)); > > /* let's make sure no one deallocates ept while we use it */ > if (ept) > @@ -739,8 +744,8 @@ static int rpmsg_recv_single(struct virtproc_info *vrp, struct device *dev, > mutex_lock(&ept->cb_lock); > > if (ept->cb) > - ept->cb(ept->rpdev, msg->data, msg->len, ept->priv, > - msg->src); > + ept->cb(ept->rpdev, msg->data, msg_len, ept->priv, > + le32_to_cpu(msg->src)); > > mutex_unlock(&ept->cb_lock); > > @@ -846,15 +851,15 @@ static int rpmsg_ns_cb(struct rpmsg_device *rpdev, void *data, int len, > /* don't trust the remote processor for null terminating the name */ > msg->name[RPMSG_NAME_SIZE - 1] = '\0'; > > - dev_info(dev, "%sing channel %s addr 0x%x\n", > - msg->flags & RPMSG_NS_DESTROY ? "destroy" : "creat", > - msg->name, msg->addr); > - > strncpy(chinfo.name, msg->name, sizeof(chinfo.name)); > chinfo.src = RPMSG_ADDR_ANY; > - chinfo.dst = msg->addr; > + chinfo.dst = le32_to_cpu(msg->addr); > + > + dev_info(dev, "%sing channel %s addr 0x%x\n", > + le32_to_cpu(msg->flags) & RPMSG_NS_DESTROY ? "destroy" : "creat", > + msg->name, chinfo.dst); > > - if (msg->flags & RPMSG_NS_DESTROY) { > + if (le32_to_cpu(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); > -- > 1.9.3 >
Hi Mathieu, Thanks for your review. On Mon, Jun 15, 2020 at 02:47:07PM -0600, Mathieu Poirier wrote: > On Mon, Jun 08, 2020 at 02:39:32PM +0200, Guennadi Liakhovetski wrote: > > According to the VirtIO 1.0 spec data, sent over virtual queues must > > be in little-endian format. Update the RPMsg VirtIO implementation > > to enforce that. > > > > Suggested-by: Michael S. Tsirkin <mst@redhat.com> > > Signed-off-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com> > > --- > > drivers/rpmsg/virtio_rpmsg_bus.c | 61 ++++++++++++++++++++++------------------ > > 1 file changed, 33 insertions(+), 28 deletions(-) > > > > diff --git a/drivers/rpmsg/virtio_rpmsg_bus.c b/drivers/rpmsg/virtio_rpmsg_bus.c > > index 07d4f33..b8ff42b 100644 > > --- a/drivers/rpmsg/virtio_rpmsg_bus.c > > +++ b/drivers/rpmsg/virtio_rpmsg_bus.c > > @@ -11,6 +11,8 @@ > > > > #define pr_fmt(fmt) "%s: " fmt, __func__ > > > > +#include <asm/byteorder.h> > > + > > #include <linux/dma-mapping.h> > > #include <linux/idr.h> > > #include <linux/jiffies.h> > > @@ -22,6 +24,7 @@ > > #include <linux/scatterlist.h> > > #include <linux/slab.h> > > #include <linux/sched.h> > > +#include <linux/types.h> > > #include <linux/virtio.h> > > #include <linux/virtio_ids.h> > > #include <linux/virtio_config.h> > > @@ -84,11 +87,11 @@ struct virtproc_info { > > * Every message sent(/received) on the rpmsg bus begins with this header. > > */ > > struct rpmsg_hdr { > > - u32 src; > > - u32 dst; > > - u32 reserved; > > - u16 len; > > - u16 flags; > > + __le32 src; > > + __le32 dst; > > + __le32 reserved; > > + __le16 len; > > + __le16 flags; > > u8 data[]; > > } __packed; > > > > @@ -106,8 +109,8 @@ struct rpmsg_hdr { > > */ > > struct rpmsg_ns_msg { > > char name[RPMSG_NAME_SIZE]; > > - u32 addr; > > - u32 flags; > > + __le32 addr; > > + __le32 flags; > > } __packed; > > > > /** > > @@ -335,8 +338,8 @@ 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 = rpdev->ept->addr; > > - nsm.flags = RPMSG_NS_CREATE; > > + nsm.addr = cpu_to_le32(rpdev->ept->addr); > > + nsm.flags = cpu_to_le32(RPMSG_NS_CREATE); > > So how will this work with existing firmware? Is this currently running on any BE machines? > > err = rpmsg_sendto(rpdev->ept, &nsm, sizeof(nsm), RPMSG_NS_ADDR); > > if (err) > > @@ -359,8 +362,8 @@ 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 = rpdev->ept->addr; > > - nsm.flags = RPMSG_NS_DESTROY; > > + nsm.addr = cpu_to_le32(rpdev->ept->addr); > > + nsm.flags = cpu_to_le32(RPMSG_NS_DESTROY); > > > > err = rpmsg_sendto(rpdev->ept, &nsm, sizeof(nsm), RPMSG_NS_ADDR); > > if (err) > > @@ -612,15 +615,15 @@ static int rpmsg_send_offchannel_raw(struct rpmsg_device *rpdev, > > } > > } > > > > - msg->len = len; > > + msg->len = cpu_to_le16(len); > > msg->flags = 0; > > - msg->src = src; > > - msg->dst = dst; > > + msg->src = cpu_to_le32(src); > > + msg->dst = cpu_to_le32(dst); > > msg->reserved = 0; > > memcpy(msg->data, data, len); > > > > dev_dbg(dev, "TX From 0x%x, To 0x%x, Len %d, Flags %d, Reserved %d\n", > > - msg->src, msg->dst, msg->len, msg->flags, msg->reserved); > > + src, dst, len, msg->flags, msg->reserved); > > #if defined(CONFIG_DYNAMIC_DEBUG) > > dynamic_hex_dump("rpmsg_virtio TX: ", DUMP_PREFIX_NONE, 16, 1, > > msg, sizeof(*msg) + msg->len, true); > > @@ -704,13 +707,15 @@ static int rpmsg_recv_single(struct virtproc_info *vrp, struct device *dev, > > { > > struct rpmsg_endpoint *ept; > > struct scatterlist sg; > > + unsigned int msg_len = le16_to_cpu(msg->len); > > And here too, along with everything else that follows? > > As Michael suggested using __virtioXY types would allow to use the > virtioXY_to_cpu() and cpu_to_virtioXY() macros, which is definitely a step in > the right direction. Ok, sure, I'll redo this, I just wanted to see if there would be any more comments before submitting a new version. Thanks Guennadi > > Thanks, > Mathieu > > > int err; > > > > dev_dbg(dev, "From: 0x%x, To: 0x%x, Len: %d, Flags: %d, Reserved: %d\n", > > - msg->src, msg->dst, msg->len, msg->flags, msg->reserved); > > + le32_to_cpu(msg->src), le32_to_cpu(msg->dst), msg_len, > > + le16_to_cpu(msg->flags), le32_to_cpu(msg->reserved)); > > #if defined(CONFIG_DYNAMIC_DEBUG) > > dynamic_hex_dump("rpmsg_virtio RX: ", DUMP_PREFIX_NONE, 16, 1, > > - msg, sizeof(*msg) + msg->len, true); > > + msg, sizeof(*msg) + msg_len, true); > > #endif > > > > /* > > @@ -718,15 +723,15 @@ static int rpmsg_recv_single(struct virtproc_info *vrp, struct device *dev, > > * the reported payload length. > > */ > > if (len > vrp->buf_size || > > - msg->len > (len - sizeof(struct rpmsg_hdr))) { > > - dev_warn(dev, "inbound msg too big: (%d, %d)\n", len, msg->len); > > + msg_len > (len - sizeof(struct rpmsg_hdr))) { > > + dev_warn(dev, "inbound msg too big: (%d, %d)\n", len, msg_len); > > return -EINVAL; > > } > > > > /* use the dst addr to fetch the callback of the appropriate user */ > > mutex_lock(&vrp->endpoints_lock); > > > > - ept = idr_find(&vrp->endpoints, msg->dst); > > + ept = idr_find(&vrp->endpoints, le32_to_cpu(msg->dst)); > > > > /* let's make sure no one deallocates ept while we use it */ > > if (ept) > > @@ -739,8 +744,8 @@ static int rpmsg_recv_single(struct virtproc_info *vrp, struct device *dev, > > mutex_lock(&ept->cb_lock); > > > > if (ept->cb) > > - ept->cb(ept->rpdev, msg->data, msg->len, ept->priv, > > - msg->src); > > + ept->cb(ept->rpdev, msg->data, msg_len, ept->priv, > > + le32_to_cpu(msg->src)); > > > > mutex_unlock(&ept->cb_lock); > > > > @@ -846,15 +851,15 @@ static int rpmsg_ns_cb(struct rpmsg_device *rpdev, void *data, int len, > > /* don't trust the remote processor for null terminating the name */ > > msg->name[RPMSG_NAME_SIZE - 1] = '\0'; > > > > - dev_info(dev, "%sing channel %s addr 0x%x\n", > > - msg->flags & RPMSG_NS_DESTROY ? "destroy" : "creat", > > - msg->name, msg->addr); > > - > > strncpy(chinfo.name, msg->name, sizeof(chinfo.name)); > > chinfo.src = RPMSG_ADDR_ANY; > > - chinfo.dst = msg->addr; > > + chinfo.dst = le32_to_cpu(msg->addr); > > + > > + dev_info(dev, "%sing channel %s addr 0x%x\n", > > + le32_to_cpu(msg->flags) & RPMSG_NS_DESTROY ? "destroy" : "creat", > > + msg->name, chinfo.dst); > > > > - if (msg->flags & RPMSG_NS_DESTROY) { > > + if (le32_to_cpu(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); > > -- > > 1.9.3 > >
diff --git a/drivers/rpmsg/virtio_rpmsg_bus.c b/drivers/rpmsg/virtio_rpmsg_bus.c index 07d4f33..b8ff42b 100644 --- a/drivers/rpmsg/virtio_rpmsg_bus.c +++ b/drivers/rpmsg/virtio_rpmsg_bus.c @@ -11,6 +11,8 @@ #define pr_fmt(fmt) "%s: " fmt, __func__ +#include <asm/byteorder.h> + #include <linux/dma-mapping.h> #include <linux/idr.h> #include <linux/jiffies.h> @@ -22,6 +24,7 @@ #include <linux/scatterlist.h> #include <linux/slab.h> #include <linux/sched.h> +#include <linux/types.h> #include <linux/virtio.h> #include <linux/virtio_ids.h> #include <linux/virtio_config.h> @@ -84,11 +87,11 @@ struct virtproc_info { * Every message sent(/received) on the rpmsg bus begins with this header. */ struct rpmsg_hdr { - u32 src; - u32 dst; - u32 reserved; - u16 len; - u16 flags; + __le32 src; + __le32 dst; + __le32 reserved; + __le16 len; + __le16 flags; u8 data[]; } __packed; @@ -106,8 +109,8 @@ struct rpmsg_hdr { */ struct rpmsg_ns_msg { char name[RPMSG_NAME_SIZE]; - u32 addr; - u32 flags; + __le32 addr; + __le32 flags; } __packed; /** @@ -335,8 +338,8 @@ 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 = rpdev->ept->addr; - nsm.flags = RPMSG_NS_CREATE; + nsm.addr = cpu_to_le32(rpdev->ept->addr); + nsm.flags = cpu_to_le32(RPMSG_NS_CREATE); err = rpmsg_sendto(rpdev->ept, &nsm, sizeof(nsm), RPMSG_NS_ADDR); if (err) @@ -359,8 +362,8 @@ 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 = rpdev->ept->addr; - nsm.flags = RPMSG_NS_DESTROY; + nsm.addr = cpu_to_le32(rpdev->ept->addr); + nsm.flags = cpu_to_le32(RPMSG_NS_DESTROY); err = rpmsg_sendto(rpdev->ept, &nsm, sizeof(nsm), RPMSG_NS_ADDR); if (err) @@ -612,15 +615,15 @@ static int rpmsg_send_offchannel_raw(struct rpmsg_device *rpdev, } } - msg->len = len; + msg->len = cpu_to_le16(len); msg->flags = 0; - msg->src = src; - msg->dst = dst; + msg->src = cpu_to_le32(src); + msg->dst = cpu_to_le32(dst); msg->reserved = 0; memcpy(msg->data, data, len); dev_dbg(dev, "TX From 0x%x, To 0x%x, Len %d, Flags %d, Reserved %d\n", - msg->src, msg->dst, msg->len, msg->flags, msg->reserved); + src, dst, len, msg->flags, msg->reserved); #if defined(CONFIG_DYNAMIC_DEBUG) dynamic_hex_dump("rpmsg_virtio TX: ", DUMP_PREFIX_NONE, 16, 1, msg, sizeof(*msg) + msg->len, true); @@ -704,13 +707,15 @@ static int rpmsg_recv_single(struct virtproc_info *vrp, struct device *dev, { struct rpmsg_endpoint *ept; struct scatterlist sg; + unsigned int msg_len = le16_to_cpu(msg->len); int err; dev_dbg(dev, "From: 0x%x, To: 0x%x, Len: %d, Flags: %d, Reserved: %d\n", - msg->src, msg->dst, msg->len, msg->flags, msg->reserved); + le32_to_cpu(msg->src), le32_to_cpu(msg->dst), msg_len, + le16_to_cpu(msg->flags), le32_to_cpu(msg->reserved)); #if defined(CONFIG_DYNAMIC_DEBUG) dynamic_hex_dump("rpmsg_virtio RX: ", DUMP_PREFIX_NONE, 16, 1, - msg, sizeof(*msg) + msg->len, true); + msg, sizeof(*msg) + msg_len, true); #endif /* @@ -718,15 +723,15 @@ static int rpmsg_recv_single(struct virtproc_info *vrp, struct device *dev, * the reported payload length. */ if (len > vrp->buf_size || - msg->len > (len - sizeof(struct rpmsg_hdr))) { - dev_warn(dev, "inbound msg too big: (%d, %d)\n", len, msg->len); + msg_len > (len - sizeof(struct rpmsg_hdr))) { + dev_warn(dev, "inbound msg too big: (%d, %d)\n", len, msg_len); return -EINVAL; } /* use the dst addr to fetch the callback of the appropriate user */ mutex_lock(&vrp->endpoints_lock); - ept = idr_find(&vrp->endpoints, msg->dst); + ept = idr_find(&vrp->endpoints, le32_to_cpu(msg->dst)); /* let's make sure no one deallocates ept while we use it */ if (ept) @@ -739,8 +744,8 @@ static int rpmsg_recv_single(struct virtproc_info *vrp, struct device *dev, mutex_lock(&ept->cb_lock); if (ept->cb) - ept->cb(ept->rpdev, msg->data, msg->len, ept->priv, - msg->src); + ept->cb(ept->rpdev, msg->data, msg_len, ept->priv, + le32_to_cpu(msg->src)); mutex_unlock(&ept->cb_lock); @@ -846,15 +851,15 @@ static int rpmsg_ns_cb(struct rpmsg_device *rpdev, void *data, int len, /* don't trust the remote processor for null terminating the name */ msg->name[RPMSG_NAME_SIZE - 1] = '\0'; - dev_info(dev, "%sing channel %s addr 0x%x\n", - msg->flags & RPMSG_NS_DESTROY ? "destroy" : "creat", - msg->name, msg->addr); - strncpy(chinfo.name, msg->name, sizeof(chinfo.name)); chinfo.src = RPMSG_ADDR_ANY; - chinfo.dst = msg->addr; + chinfo.dst = le32_to_cpu(msg->addr); + + dev_info(dev, "%sing channel %s addr 0x%x\n", + le32_to_cpu(msg->flags) & RPMSG_NS_DESTROY ? "destroy" : "creat", + msg->name, chinfo.dst); - if (msg->flags & RPMSG_NS_DESTROY) { + if (le32_to_cpu(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);
According to the VirtIO 1.0 spec data, sent over virtual queues must be in little-endian format. Update the RPMsg VirtIO implementation to enforce that. Suggested-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com> --- drivers/rpmsg/virtio_rpmsg_bus.c | 61 ++++++++++++++++++++++------------------ 1 file changed, 33 insertions(+), 28 deletions(-)