1 files changed, 168 insertions, 0 deletions
diff --git a/hw/block/nvme-ns.c b/hw/block/nvme-ns.c
new file mode 100644
index 0000000000..31c80cdf5b
--- /dev/null
+++ b/hw/block/nvme-ns.c
@@ -0,0 +1,168 @@
+/*
+ * QEMU NVM Express Virtual Namespace
+ *
+ * Copyright (c) 2019 CNEX Labs
+ * Copyright (c) 2020 Samsung Electronics
+ *
+ * Authors:
+ *  Klaus Jensen      <k.jensen@samsung.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2. See the
+ * COPYING file in the top-level directory.
+ *
+ */
+
+#include "qemu/osdep.h"
+#include "qemu/units.h"
+#include "qemu/cutils.h"
+#include "qemu/log.h"
+#include "hw/block/block.h"
+#include "hw/pci/pci.h"
+#include "sysemu/sysemu.h"
+#include "sysemu/block-backend.h"
+#include "qapi/error.h"
+
+#include "hw/qdev-properties.h"
+#include "hw/qdev-core.h"
+
+#include "nvme.h"
+#include "nvme-ns.h"
+
+static void nvme_ns_init(NvmeNamespace *ns)
+{
+    NvmeIdNs *id_ns = &ns->id_ns;
+    int lba_index = NVME_ID_NS_FLBAS_INDEX(ns->id_ns.flbas);
+
+    if (blk_get_flags(ns->blkconf.blk) & BDRV_O_UNMAP) {
+        ns->id_ns.dlfeat = 0x9;
+    }
+
+    id_ns->lbaf[lba_index].ds = 31 - clz32(ns->blkconf.logical_block_size);
+
+    id_ns->nsze = cpu_to_le64(nvme_ns_nlbas(ns));
+
+    /* no thin provisioning */
+    id_ns->ncap = id_ns->nsze;
+    id_ns->nuse = id_ns->ncap;
+}
+
+static int nvme_ns_init_blk(NvmeCtrl *n, NvmeNamespace *ns, Error **errp)
+{
+    if (!blkconf_blocksizes(&ns->blkconf, errp)) {
+        return -1;
+    }
+
+    if (!blkconf_apply_backend_options(&ns->blkconf,
+                                       blk_is_read_only(ns->blkconf.blk),
+                                       false, errp)) {
+        return -1;
+    }
+
+    ns->size = blk_getlength(ns->blkconf.blk);
+    if (ns->size < 0) {
+        error_setg_errno(errp, -ns->size, "could not get blockdev size");
+        return -1;
+    }
+
+    if (blk_enable_write_cache(ns->blkconf.blk)) {
+        n->features.vwc = 0x1;
+    }
+
+    return 0;
+}
+
+static int nvme_ns_check_constraints(NvmeNamespace *ns, Error **errp)
+{
+    if (!ns->blkconf.blk) {
+        error_setg(errp, "block backend not configured");
+        return -1;
+    }
+
+    return 0;
+}
+
+int nvme_ns_setup(NvmeCtrl *n, NvmeNamespace *ns, Error **errp)
+{
+    if (nvme_ns_check_constraints(ns, errp)) {
+        return -1;
+    }
+
+    if (nvme_ns_init_blk(n, ns, errp)) {
+        return -1;
+    }
+
+    nvme_ns_init(ns);
+    if (nvme_register_namespace(n, ns, errp)) {
+        return -1;
+    }
+
+    return 0;
+}
+
+void nvme_ns_drain(NvmeNamespace *ns)
+{
+    blk_drain(ns->blkconf.blk);
+}
+
+void nvme_ns_flush(NvmeNamespace *ns)
+{
+    blk_flush(ns->blkconf.blk);
+}
+
+static void nvme_ns_realize(DeviceState *dev, Error **errp)
+{
+    NvmeNamespace *ns = NVME_NS(dev);
+    BusState *s = qdev_get_parent_bus(dev);
+    NvmeCtrl *n = NVME(s->parent);
+    Error *local_err = NULL;
+
+    if (nvme_ns_setup(n, ns, &local_err)) {
+        error_propagate_prepend(errp, local_err,
+                                "could not setup namespace: ");
+        return;
+    }
+}
+
+static Property nvme_ns_props[] = {
+    DEFINE_BLOCK_PROPERTIES(NvmeNamespace, blkconf),
+    DEFINE_PROP_UINT32("nsid", NvmeNamespace, params.nsid, 0),
+    DEFINE_PROP_END_OF_LIST(),
+};
+
+static void nvme_ns_class_init(ObjectClass *oc, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(oc);
+
+    set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
+
+    dc->bus_type = TYPE_NVME_BUS;
+    dc->realize = nvme_ns_realize;
+    device_class_set_props(dc, nvme_ns_props);
+    dc->desc = "Virtual NVMe namespace";
+}
+
+static void nvme_ns_instance_init(Object *obj)
+{
+    NvmeNamespace *ns = NVME_NS(obj);
+    char *bootindex = g_strdup_printf("/namespace@%d,0", ns->params.nsid);
+
+    device_add_bootindex_property(obj, &ns->bootindex, "bootindex",
+                                  bootindex, DEVICE(obj));
+
+    g_free(bootindex);
+}
+
+static const TypeInfo nvme_ns_info = {
+    .name = TYPE_NVME_NS,
+    .parent = TYPE_DEVICE,
+    .class_init = nvme_ns_class_init,
+    .instance_size = sizeof(NvmeNamespace),
+    .instance_init = nvme_ns_instance_init,
+};
+
+static void nvme_ns_register_types(void)
+{
+    type_register_static(&nvme_ns_info);
+}
+
+type_init(nvme_ns_register_types)