Forward these two calls to the IOVA manager.
Signed-off-by: Fam Zheng <f...@redhat.com>
Message-Id: <20180110091846.10699-6-f...@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefa...@redhat.com>
Message-Id: <20180116060901.17413-6-f...@redhat.com>
Signed-off-by: Fam Zheng <f...@redhat.com>
---
block/nvme.c | 24 ++++++++++++++++++++++++
1 file changed, 24 insertions(+)
diff --git a/block/nvme.c b/block/nvme.c
index 99cc7702ad..30616f50c7 100644
--- a/block/nvme.c
+++ b/block/nvme.c
@@ -1145,6 +1145,27 @@ static void nvme_aio_unplug(BlockDriverState *bs)
}
}
+static void nvme_register_buf(BlockDriverState *bs, void *host, size_t size)
+{
+ int ret;
+ BDRVNVMeState *s = bs->opaque;
+
+ ret = qemu_vfio_dma_map(s->vfio, host, size, false, NULL);
+ if (ret) {
+ /* FIXME: we may run out of IOVA addresses after repeated
+ * bdrv_register_buf/bdrv_unregister_buf, because nvme_vfio_dma_unmap
+ * doesn't reclaim addresses for fixed mappings. */
+ error_report("nvme_register_buf failed: %s", strerror(-ret));
+ }
+}
+
+static void nvme_unregister_buf(BlockDriverState *bs, void *host)
+{
+ BDRVNVMeState *s = bs->opaque;
+
+ qemu_vfio_dma_unmap(s->vfio, host);
+}
+
static BlockDriver bdrv_nvme = {
.format_name = "nvme",
.protocol_name = "nvme",
@@ -1170,6 +1191,9 @@ static BlockDriver bdrv_nvme = {
.bdrv_io_plug = nvme_aio_plug,
.bdrv_io_unplug = nvme_aio_unplug,
+
+ .bdrv_register_buf = nvme_register_buf,
+ .bdrv_unregister_buf = nvme_unregister_buf,
};
static void bdrv_nvme_init(void)
--
2.14.3
