From e5788b8fbf9361c978eb8347471d8f855580777f Mon Sep 17 00:00:00 2001 From: Manos Pitsidianakis Date: Mon, 23 Oct 2023 15:03:24 +0300 Subject: [PATCH] virtio-sound: handle VIRTIO_SND_R_PCM_PREPARE MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Handles the PCM prepare control request. It initializes a PCM stream when the guests asks for it. Based-on: https://github.com/OpenSynergy/qemu/commit/5a2f350eec5d157b90d9c7b40a8e603f4da92471 Signed-off-by: Igor Skalkin Signed-off-by: Anton Yakovlev Signed-off-by: Manos Pitsidianakis Reviewed-by: Alex Bennée Tested-by: Alex Bennée Message-Id: Acked-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin --- hw/audio/virtio-snd.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/hw/audio/virtio-snd.c b/hw/audio/virtio-snd.c index 084890e52b..31a1942754 100644 --- a/hw/audio/virtio-snd.c +++ b/hw/audio/virtio-snd.c @@ -478,6 +478,28 @@ static const char *print_code(uint32_t code) #undef CASE }; +/* + * Handles VIRTIO_SND_R_PCM_PREPARE. + * + * @s: VirtIOSound device + * @cmd: The request command queue element from VirtIOSound cmdq field + */ +static void virtio_snd_handle_pcm_prepare(VirtIOSound *s, + virtio_snd_ctrl_command *cmd) +{ + uint32_t stream_id; + size_t msg_sz = iov_to_buf(cmd->elem->out_sg, + cmd->elem->out_num, + sizeof(virtio_snd_hdr), + &stream_id, + sizeof(stream_id)); + + stream_id = le32_to_cpu(stream_id); + cmd->resp.code = msg_sz == sizeof(stream_id) + ? virtio_snd_pcm_prepare(s, stream_id) + : cpu_to_le32(VIRTIO_SND_S_BAD_MSG); +} + /* * Handles VIRTIO_SND_R_PCM_START. * @@ -569,6 +591,8 @@ process_cmd(VirtIOSound *s, virtio_snd_ctrl_command *cmd) virtio_snd_handle_pcm_set_params(s, cmd); break; case VIRTIO_SND_R_PCM_PREPARE: + virtio_snd_handle_pcm_prepare(s, cmd); + break; case VIRTIO_SND_R_PCM_RELEASE: cmd->resp.code = cpu_to_le32(VIRTIO_SND_S_NOT_SUPP); break;