From 90739983d043b027e4db932a105d4afc19f3e4c9 Mon Sep 17 00:00:00 2001 From: Xiang Xiao Date: Mon, 7 Jan 2019 02:15:42 +0800 Subject: [PATCH] gns: acknowledge the received creation message the two phase handsake make the client could initiate the transfer immediately without the server side send any dummy message first. Signed-off-by: Xiang Xiao --- lib/include/openamp/rpmsg.h | 1 + lib/include/openamp/rpmsg_virtio.h | 1 + lib/rpmsg/rpmsg.c | 5 ++++- lib/rpmsg/rpmsg_internal.h | 4 ++-- lib/rpmsg/rpmsg_virtio.c | 15 ++++++++++++--- 5 files changed, 20 insertions(+), 6 deletions(-) diff --git a/lib/include/openamp/rpmsg.h b/lib/include/openamp/rpmsg.h index 2d2ce1c81..0dd864827 100644 --- a/lib/include/openamp/rpmsg.h +++ b/lib/include/openamp/rpmsg.h @@ -120,6 +120,7 @@ struct rpmsg_device { rpmsg_ns_bind_cb ns_bind_cb; struct rpmsg_device_ops ops; bool support_ns; + bool support_ack; }; /** diff --git a/lib/include/openamp/rpmsg_virtio.h b/lib/include/openamp/rpmsg_virtio.h index ff1e17119..255396cb4 100644 --- a/lib/include/openamp/rpmsg_virtio.h +++ b/lib/include/openamp/rpmsg_virtio.h @@ -28,6 +28,7 @@ extern "C" { /* The feature bitmap for virtio rpmsg */ #define VIRTIO_RPMSG_F_NS 0 /* RP supports name service notifications */ +#define VIRTIO_RPMSG_F_ACK 1 /* RP supports name service acknowledge */ /** * struct rpmsg_virtio_shm_pool - shared memory pool used for rpmsg buffers diff --git a/lib/rpmsg/rpmsg.c b/lib/rpmsg/rpmsg.c index 214b2a98e..ba2b7a820 100644 --- a/lib/rpmsg/rpmsg.c +++ b/lib/rpmsg/rpmsg.c @@ -302,10 +302,13 @@ int rpmsg_create_ept(struct rpmsg_endpoint *ept, struct rpmsg_device *rdev, rpmsg_register_endpoint(rdev, ept, name, addr, dest, cb, unbind_cb); metal_mutex_release(&rdev->lock); - /* Send NS announcement to remote processor */ + /* Send NS announcement/acknowledge to remote processor */ if (ept->name[0] && rdev->support_ns && ept->dest_addr == RPMSG_ADDR_ANY) status = rpmsg_send_ns_message(ept, RPMSG_NS_CREATE); + else if (ept->name[0] && rdev->support_ack && + ept->dest_addr != RPMSG_ADDR_ANY) + status = rpmsg_send_ns_message(ept, RPMSG_NS_CREATE_ACK); if (status) rpmsg_unregister_endpoint(ept); diff --git a/lib/rpmsg/rpmsg_internal.h b/lib/rpmsg/rpmsg_internal.h index ab6e0f294..3e6ae37fd 100644 --- a/lib/rpmsg/rpmsg_internal.h +++ b/lib/rpmsg/rpmsg_internal.h @@ -39,12 +39,12 @@ extern "C" { * * @RPMSG_NS_CREATE: a new remote service was just created * @RPMSG_NS_DESTROY: a known remote service was just destroyed - * @RPMSG_NS_CREATE_WITH_ACK: a new remote service was just created waiting - * acknowledgment. + * @RPMSG_NS_CREATE_ACK: acknowledge the previous creation message */ enum rpmsg_ns_flags { RPMSG_NS_CREATE = 0, RPMSG_NS_DESTROY = 1, + RPMSG_NS_CREATE_ACK = 2, }; /** diff --git a/lib/rpmsg/rpmsg_virtio.c b/lib/rpmsg/rpmsg_virtio.c index 57a2083a4..4d1a4267c 100644 --- a/lib/rpmsg/rpmsg_virtio.c +++ b/lib/rpmsg/rpmsg_virtio.c @@ -579,13 +579,13 @@ static int rpmsg_virtio_ns_callback(struct rpmsg_endpoint *ept, void *data, metal_mutex_acquire(&rdev->lock); _ept = rpmsg_get_endpoint(rdev, name, RPMSG_ADDR_ANY, dest); - if (ns_msg->flags & RPMSG_NS_DESTROY) { + if (ns_msg->flags == RPMSG_NS_DESTROY) { if (_ept) _ept->dest_addr = RPMSG_ADDR_ANY; metal_mutex_release(&rdev->lock); if (_ept && _ept->ns_unbind_cb) _ept->ns_unbind_cb(_ept); - } else { + } else if (ns_msg->flags == RPMSG_NS_CREATE) { if (!_ept) { /* * send callback to application, that can @@ -599,7 +599,15 @@ static int rpmsg_virtio_ns_callback(struct rpmsg_endpoint *ept, void *data, } else { _ept->dest_addr = dest; metal_mutex_release(&rdev->lock); + if (_ept->name[0] && rdev->support_ack) + rpmsg_send_ns_message(_ept, + RPMSG_NS_CREATE_ACK); } + } else { /* RPMSG_NS_CREATE_ACK */ + /* save the received destination address */ + if (_ept) + _ept->dest_addr = dest; + metal_mutex_release(&rdev->lock); } return RPMSG_SUCCESS; @@ -680,6 +688,7 @@ int rpmsg_init_vdev_with_config(struct rpmsg_virtio_device *rvdev, #endif /*!VIRTIO_DRIVER_ONLY*/ vdev->features = rpmsg_virtio_get_features(rvdev); rdev->support_ns = !!(vdev->features & (1 << VIRTIO_RPMSG_F_NS)); + rdev->support_ack = !!(vdev->features & (1 << VIRTIO_RPMSG_F_ACK)); #ifndef VIRTIO_DEVICE_ONLY if (role == RPMSG_HOST) { @@ -775,7 +784,7 @@ int rpmsg_init_vdev_with_config(struct rpmsg_virtio_device *rvdev, * Create name service announcement endpoint if device supports name * service announcement feature. */ - if (rdev->support_ns) { + if (rdev->support_ns || rdev->support_ack) { rpmsg_register_endpoint(rdev, &rdev->ns_ept, "NS", RPMSG_NS_EPT_ADDR, RPMSG_NS_EPT_ADDR, rpmsg_virtio_ns_callback, NULL);