Commit 9ed61612 authored by Fam Zheng's avatar Fam Zheng
Browse files

block/nvme: Implement .bdrv_(un)register_buf 



Forward these two calls to the IOVA manager.

Signed-off-by: default avatarFam Zheng <famz@redhat.com>
Reviewed-by: default avatarStefan Hajnoczi <stefanha@redhat.com>
Message-Id: <20180116060901.17413-6-famz@redhat.com>
Signed-off-by: default avatarFam Zheng <famz@redhat.com>
parent 23d0ba93

block/nvme.c

+24 −0
Original line number Diff line number Diff line
@@ -1147,6 +1147,27 @@ 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",
@@ -1172,6 +1193,9 @@ 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)