From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:59378) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eeaNZ-0006tb-4a for qemu-devel@nongnu.org; Thu, 25 Jan 2018 00:47:17 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eeaNY-0007fo-7Q for qemu-devel@nongnu.org; Thu, 25 Jan 2018 00:47:17 -0500 Received: from mx1.redhat.com ([209.132.183.28]:41186) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1eeaNY-0007dw-2n for qemu-devel@nongnu.org; Thu, 25 Jan 2018 00:47:16 -0500 From: Fam Zheng Date: Thu, 25 Jan 2018 13:46:44 +0800 Message-Id: <20180125054648.18747-11-famz@redhat.com> In-Reply-To: <20180125054648.18747-1-famz@redhat.com> References: <20180125054648.18747-1-famz@redhat.com> Subject: [Qemu-devel] [PULL 10/14] block/nvme: Implement .bdrv_(un)register_buf List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Peter Maydell Forward these two calls to the IOVA manager. Signed-off-by: Fam Zheng Message-Id: <20180110091846.10699-6-famz@redhat.com> Reviewed-by: Stefan Hajnoczi Message-Id: <20180116060901.17413-6-famz@redhat.com> Signed-off-by: Fam Zheng --- 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