From f73c0c43ac1ddeb21804b8683e1c674ad1b4c7d2 Mon Sep 17 00:00:00 2001 From: Eugenio Pérez Date: Tue, 6 Sep 2022 17:07:15 +0200 Subject: vdpa: extract vhost_vdpa_net_load_mac from vhost_vdpa_net_load Since there may be many commands we need to issue to load the NIC state, let's split them in individual functions Signed-off-by: Eugenio Pérez Signed-off-by: Jason Wang --- net/vhost-vdpa.c | 62 ++++++++++++++++++++++++++++++++++++-------------------- 1 file changed, 40 insertions(+), 22 deletions(-) (limited to 'net') diff --git a/net/vhost-vdpa.c b/net/vhost-vdpa.c index 535315c1d0..e799e744cd 100644 --- a/net/vhost-vdpa.c +++ b/net/vhost-vdpa.c @@ -365,12 +365,47 @@ static ssize_t vhost_vdpa_net_cvq_add(VhostVDPAState *s, size_t out_len, return vhost_svq_poll(svq); } +static ssize_t vhost_vdpa_net_load_cmd(VhostVDPAState *s, uint8_t class, + uint8_t cmd, const void *data, + size_t data_size) +{ + const struct virtio_net_ctrl_hdr ctrl = { + .class = class, + .cmd = cmd, + }; + + assert(data_size < vhost_vdpa_net_cvq_cmd_page_len() - sizeof(ctrl)); + + memcpy(s->cvq_cmd_out_buffer, &ctrl, sizeof(ctrl)); + memcpy(s->cvq_cmd_out_buffer + sizeof(ctrl), data, data_size); + + return vhost_vdpa_net_cvq_add(s, sizeof(ctrl) + data_size, + sizeof(virtio_net_ctrl_ack)); +} + +static int vhost_vdpa_net_load_mac(VhostVDPAState *s, const VirtIONet *n) +{ + uint64_t features = n->parent_obj.guest_features; + if (features & BIT_ULL(VIRTIO_NET_F_CTRL_MAC_ADDR)) { + ssize_t dev_written = vhost_vdpa_net_load_cmd(s, VIRTIO_NET_CTRL_MAC, + VIRTIO_NET_CTRL_MAC_ADDR_SET, + n->mac, sizeof(n->mac)); + if (unlikely(dev_written < 0)) { + return dev_written; + } + + return *s->status != VIRTIO_NET_OK; + } + + return 0; +} + static int vhost_vdpa_net_load(NetClientState *nc) { VhostVDPAState *s = DO_UPCAST(VhostVDPAState, nc, nc); - const struct vhost_vdpa *v = &s->vhost_vdpa; + struct vhost_vdpa *v = &s->vhost_vdpa; const VirtIONet *n; - uint64_t features; + int r; assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA); @@ -379,26 +414,9 @@ static int vhost_vdpa_net_load(NetClientState *nc) } n = VIRTIO_NET(v->dev->vdev); - features = n->parent_obj.guest_features; - if (features & BIT_ULL(VIRTIO_NET_F_CTRL_MAC_ADDR)) { - const struct virtio_net_ctrl_hdr ctrl = { - .class = VIRTIO_NET_CTRL_MAC, - .cmd = VIRTIO_NET_CTRL_MAC_ADDR_SET, - }; - char *cursor = s->cvq_cmd_out_buffer; - ssize_t dev_written; - - memcpy(cursor, &ctrl, sizeof(ctrl)); - cursor += sizeof(ctrl); - memcpy(cursor, n->mac, sizeof(n->mac)); - - dev_written = vhost_vdpa_net_cvq_add(s, sizeof(ctrl) + sizeof(n->mac), - sizeof(virtio_net_ctrl_ack)); - if (unlikely(dev_written < 0)) { - return dev_written; - } - - return *s->status != VIRTIO_NET_OK; + r = vhost_vdpa_net_load_mac(s, n); + if (unlikely(r < 0)) { + return r; } return 0; -- cgit v1.2.3-55-g7522