void
virtio_describe(device_t dev, const char *msg,
uint64_t features, struct virtio_feature_desc *feature_desc)
{
struct sbuf sb;
uint64_t val;
char *buf;
const char *name;
int n;
if ((buf = malloc(512, M_TEMP, M_NOWAIT)) == NULL) {
device_printf(dev, "%s features: 0x%"PRIx64"\n", msg,
features);
return;
}
sbuf_new(&sb, buf, 512, SBUF_FIXEDLEN);
sbuf_printf(&sb, "%s features: 0x%"PRIx64, msg, features);
for (n = 0, val = 1ULL << 63; val != 0; val >>= 1) {
/*
* BAD_FEATURE is used to detect broken Linux clients
* and therefore is not applicable to FreeBSD.
*/
if (((features & val) == 0) || val == VIRTIO_F_BAD_FEATURE)
continue;
if (n++ == 0)
sbuf_cat(&sb, " <");
else
sbuf_cat(&sb, ",");
name = NULL;
if (feature_desc != NULL)
name = virtio_feature_name(val, feature_desc);
if (name == NULL)
name = virtio_feature_name(val,
virtio_common_feature_desc);
if (name == NULL)
sbuf_printf(&sb, "0x%"PRIx64, val);
else
sbuf_cat(&sb, name);
}
if (n > 0)
sbuf_cat(&sb, ">");
#if __FreeBSD_version < 900020
sbuf_finish(&sb);
if (sbuf_overflowed(&sb) == 0)
#else
if (sbuf_finish(&sb) == 0)
#endif
device_printf(dev, "%s\n", sbuf_data(&sb));
sbuf_delete(&sb);
free(buf, M_TEMP);
}
void virtio_describe(struct virtio_device *dev, const char *msg,
uint32_t features, struct virtio_feature_desc *desc)
{
(void)dev;
(void)msg;
(void)features;
// TODO: Not used currently - keeping it for future use
virtio_feature_name(0, desc);
}
