Suppress the peer notifications while a ring keeps delivering work, batch
the receive completions into one kick per burst and drop the redundant
txdone signal from the transmit path. Validate the peer controlled frame
lengths, accept descriptor chains on both lanes, keep every ring access on
the upper half's work thread so the interrupt context callbacks stay lock
free, and prefer the MAC from the configuration space, falling back to the
Kconfig address or a random one.
Signed-off-by: zhanghongyu <zhanghongyu@xiaomi.com>
Implements the device end of virtio-net, so a peer running the stock
virtio-net driver sees this side as a network card, and registers a netdev
lowerhalf.
Ring layout follows the peer's numbering: vq[0] is its RX queue, which we fill
to transmit, and vq[1] its TX queue, which we harvest. No features are
negotiated, so every frame carries the zeroed legacy virtio_net_hdr.
Peer buffers are reached by raw 64-bit address through an arch-provided
translation window -- the AM67 RAT, identity mapping elsewhere -- splitting
copies that straddle it.
Also gives DRIVERS_VHOST a prompt; it was promptless and so unselectable
without a driver forcing it.
Verified on t3-gem-o1 against an unmodified Linux virtio_net: eth0 registers,
ifup brings it to RUNNING, and the peer pings it 5/5 at 0.27 ms and 60/60 with
0% loss.
Assisted-by: Claude Code:claude-fable-5
Signed-off-by: Ulaş Sertan Kemeç <sertan.usk@gmail.com>
vhost_get_vq_buffers() converts descriptor addresses through the shared-memory
I/O region, which truncates silently when the CPU cannot address all of the
peer's memory -- a 32-bit remote core against a 64-bit host, where
metal_phys_addr_t is 32-bit and Linux posts buffers above 4 GB.
Returns the raw 64-bit address and length instead, so class drivers can
translate through platform window hardware. Completion is unchanged.
Assisted-by: Claude Code:claude-fable-5
Signed-off-by: Ulaş Sertan Kemeç <sertan.usk@gmail.com>
debug.h is a NuttX-specific, non-POSIX header. Placing it in the
top-level include/ directory creates naming conflicts with external
projects that define their own debug.h.
This commit moves the canonical header to include/nuttx/debug.h,
following the NuttX convention for non-POSIX/non-standard headers,
and updates all in-tree references.
A backward-compatibility shim is left at include/debug.h that
emits a deprecation #warning and re-includes <nuttx/debug.h>,
allowing out-of-tree code to continue building while migrating.
Signed-off-by: Piyush Patle <piyushpatle228@gmail.com>
The vhost driver uses work_queue() for deferred probe but was missing
the SCHED_WORKQUEUE Kconfig dependency, causing link errors on boards
that don't enable workqueue by default.
Signed-off-by: wangzhi16 <wangzhi16@xiaomi.com>
Convert VHOST_DEFERED_PROBE_PERIOD from a raw value to use MSEC2TICK()
macro, ensuring the delay is correctly converted from milliseconds to
system ticks regardless of the configured tick rate.
Signed-off-by: Yongrong Wang <wangyongrong@xiaomi.com>
Change DRIVERS_VIRTIO and DRIVERS_VHOST from menuconfig to hidden config
options. Each virtio/vhost sub-driver now automatically selects its parent
config, eliminating the need to manually enable DRIVERS_VIRTIO or
DRIVERS_VHOST in defconfig files.
This simplifies board configuration by removing redundant CONFIG_DRIVERS_VIRTIO
entries from affected defconfig files.
Signed-off-by: Yongrong Wang <wangyongrong@xiaomi.com>
Signed-off-by: Bowen Wang <wangbowen6@xiaomi.com>
Add vhost_get_vq_buffers() API to retrieve all chained buffers from a
virtqueue in one call. This simplifies handling of scatter-gather I/O
where data spans multiple descriptors.
The function populates an array of virtqueue_buf structures with buffer
pointers and lengths, returning the descriptor head index on success.
Signed-off-by: Bowen Wang <wangbowen6@xiaomi.com>
Signed-off-by: hongfengchen <hongfengchen@xiaomi.com>
virtio and vhost rpmsg device as standalone device registered to
the virtio and vhost bus.
virtio-rpmsg and vhost-rpmsg use the common virtio_rpmsg_common.c
implementation in rpmsg dir.
Signed-off-by: Bowen Wang <wangbowen6@xiaomi.com>
OpenAMP already change virtqueue_get_available_buffer() to
virtqueue_get_first_avail_buffer(), so update them
Signed-off-by: Bowen Wang <wangbowen6@xiaomi.com>
vhost/vhost-rng.c:154:9: error: too few arguments to function 'virtio_create_virtqueues'
154 | ret = vhost_create_virtqueues(hdev, 0, 1, vqnames, callback);
Signed-off-by: rongyichang <rongyichang@xiaomi.com>
vhost/vhost.c: In function 'vhost_status_driver_ok':
vhost/vhost.c:86:20: error: too few arguments to function 'virtio_get_status'
86 | uint8_t status = vhost_get_status(hdev);
Signed-off-by: rongyichang <rongyichang@xiaomi.com>
Most tools used for compliance and SBOM generation use SPDX identifiers
This change brings us a step closer to an easy SBOM generation.
Signed-off-by: Alin Jerpelea <alin.jerpelea@sony.com>
1. Use the virtqueue_xxx_lock() api;
2. Add spinlock for some virtio and vhost drivers that do not
use spinlock to protect the virtqueues;
Signed-off-by: Yongrong Wang <wangyongrong@xiaomi.com>
So the driver can get the driver pointer by vdev/hdev->priv,
and later vdev/hdev->priv can be used to store other data such as the
virtio/vhost drivers' private data.
Signed-off-by: Bowen Wang <wangbowen6@xiaomi.com>
vhost-rng is a simple virtio device implementation, it receives
the buffer receviced from the virtio-rng driver and fill the random
number to this buffer and return to virtio-rng.
Signed-off-by: Bowen Wang <wangbowen6@xiaomi.com>
virtio is a framework to implement the virtio drivers
vhost (Virtual Host) is a framework to implement the virtio devices
With the virtio and vhost framework, we can use the virtio drivers
and vhost drivers to implement the cross-core communication.
Signed-off-by: Bowen Wang <wangbowen6@xiaomi.com>
