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[Qemu-devel] [PULL 11/16] block/nvme: Implement .bdrv_(un)register_buf
From: |
Fam Zheng |
Subject: |
[Qemu-devel] [PULL 11/16] block/nvme: Implement .bdrv_(un)register_buf |
Date: |
Thu, 8 Feb 2018 10:19:48 +0800 |
Forward these two calls to the IOVA manager.
Signed-off-by: Fam Zheng <address@hidden>
Reviewed-by: Stefan Hajnoczi <address@hidden>
Message-Id: <address@hidden>
Signed-off-by: Fam Zheng <address@hidden>
---
block/nvme.c | 24 ++++++++++++++++++++++++
1 file changed, 24 insertions(+)
diff --git a/block/nvme.c b/block/nvme.c
index 0bae185b88..a487b4d381 100644
--- a/block/nvme.c
+++ b/block/nvme.c
@@ -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)
--
2.14.3
- [Qemu-devel] [PULL 01/16] docker: change Fedora base image to fedora:27, (continued)
- [Qemu-devel] [PULL 01/16] docker: change Fedora base image to fedora:27, Fam Zheng, 2018/02/07
- [Qemu-devel] [PULL 02/16] test-coroutine: add simple CoMutex test, Fam Zheng, 2018/02/07
- [Qemu-devel] [PULL 04/16] coroutine-lock: convert CoQueue to use QemuLockable, Fam Zheng, 2018/02/07
- [Qemu-devel] [PULL 03/16] lockable: add QemuLockable, Fam Zheng, 2018/02/07
- [Qemu-devel] [PULL 05/16] coroutine-lock: make qemu_co_enter_next thread-safe, Fam Zheng, 2018/02/07
- [Qemu-devel] [PULL 06/16] curl: convert to CoQueue, Fam Zheng, 2018/02/07
- [Qemu-devel] [PULL 07/16] stubs: Add stubs for ram block API, Fam Zheng, 2018/02/07
- [Qemu-devel] [PULL 08/16] util: Introduce vfio helpers, Fam Zheng, 2018/02/07
- [Qemu-devel] [PULL 10/16] block: Introduce buf register API, Fam Zheng, 2018/02/07
- [Qemu-devel] [PULL 12/16] qemu-img: Map bench buffer, Fam Zheng, 2018/02/07
- [Qemu-devel] [PULL 11/16] block/nvme: Implement .bdrv_(un)register_buf,
Fam Zheng <=
- [Qemu-devel] [PULL 09/16] block: Add VFIO based NVMe driver, Fam Zheng, 2018/02/07
- [Qemu-devel] [PULL 14/16] docs: Add section for NVMe VFIO driver, Fam Zheng, 2018/02/07
- [Qemu-devel] [PULL 15/16] qapi: Add NVMe driver options to the schema, Fam Zheng, 2018/02/07
- [Qemu-devel] [PULL 13/16] block: Move NVMe constants to a separate header, Fam Zheng, 2018/02/07
- [Qemu-devel] [PULL 16/16] docs: Add docs/devel/testing.rst, Fam Zheng, 2018/02/07
- Re: [Qemu-devel] [PULL 00/16] Docker and block patches, Peter Maydell, 2018/02/08