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[PULL v2 01/38] hw/block/nvme: introduce nvme-subsys device
From: |
Klaus Jensen |
Subject: |
[PULL v2 01/38] hw/block/nvme: introduce nvme-subsys device |
Date: |
Tue, 9 Mar 2021 12:44:35 +0100 |
From: Minwoo Im <minwoo.im.dev@gmail.com>
To support multi-path in QEMU NVMe device model, We need to have NVMe
subsystem hierarchy to map controllers and namespaces to a NVMe
subsystem.
This patch introduced a simple nvme-subsys device model. The subsystem
will be prepared with subsystem NQN with <subsys_id> provided in
nvme-subsys device:
ex) -device nvme-subsys,id=subsys0: nqn.2019-08.org.qemu:subsys0
Signed-off-by: Minwoo Im <minwoo.im.dev@gmail.com>
Tested-by: Klaus Jensen <k.jensen@samsung.com>
Reviewed-by: Klaus Jensen <k.jensen@samsung.com>
Reviewed-by: Keith Busch <kbusch@kernel.org>
[k.jensen: added 'nqn' device parameter per request]
Signed-off-by: Klaus Jensen <k.jensen@samsung.com>
---
hw/block/nvme-subsys.h | 29 +++++++++++++++++
hw/block/nvme-subsys.c | 70 ++++++++++++++++++++++++++++++++++++++++++
hw/block/nvme.c | 12 ++++++++
hw/block/meson.build | 2 +-
4 files changed, 112 insertions(+), 1 deletion(-)
create mode 100644 hw/block/nvme-subsys.h
create mode 100644 hw/block/nvme-subsys.c
diff --git a/hw/block/nvme-subsys.h b/hw/block/nvme-subsys.h
new file mode 100644
index 000000000000..fc86d01ff32e
--- /dev/null
+++ b/hw/block/nvme-subsys.h
@@ -0,0 +1,29 @@
+/*
+ * QEMU NVM Express Subsystem: nvme-subsys
+ *
+ * Copyright (c) 2021 Minwoo Im <minwoo.im.dev@gmail.com>
+ *
+ * This code is licensed under the GNU GPL v2. Refer COPYING.
+ */
+
+#ifndef NVME_SUBSYS_H
+#define NVME_SUBSYS_H
+
+#define TYPE_NVME_SUBSYS "nvme-subsys"
+#define NVME_SUBSYS(obj) \
+ OBJECT_CHECK(NvmeSubsystem, (obj), TYPE_NVME_SUBSYS)
+
+#define NVME_SUBSYS_MAX_CTRLS 32
+
+typedef struct NvmeCtrl NvmeCtrl;
+typedef struct NvmeNamespace NvmeNamespace;
+typedef struct NvmeSubsystem {
+ DeviceState parent_obj;
+ uint8_t subnqn[256];
+
+ struct {
+ char *nqn;
+ } params;
+} NvmeSubsystem;
+
+#endif /* NVME_SUBSYS_H */
diff --git a/hw/block/nvme-subsys.c b/hw/block/nvme-subsys.c
new file mode 100644
index 000000000000..840448bb13f1
--- /dev/null
+++ b/hw/block/nvme-subsys.c
@@ -0,0 +1,70 @@
+/*
+ * QEMU NVM Express Subsystem: nvme-subsys
+ *
+ * Copyright (c) 2021 Minwoo Im <minwoo.im.dev@gmail.com>
+ *
+ * This code is licensed under the GNU GPL v2. Refer COPYING.
+ */
+
+#include "qemu/units.h"
+#include "qemu/osdep.h"
+#include "qemu/uuid.h"
+#include "qemu/iov.h"
+#include "qemu/cutils.h"
+#include "qapi/error.h"
+#include "hw/qdev-properties.h"
+#include "hw/qdev-core.h"
+#include "hw/block/block.h"
+#include "block/aio.h"
+#include "block/accounting.h"
+#include "sysemu/sysemu.h"
+#include "hw/pci/pci.h"
+#include "nvme.h"
+#include "nvme-subsys.h"
+
+static void nvme_subsys_setup(NvmeSubsystem *subsys)
+{
+ const char *nqn = subsys->params.nqn ?
+ subsys->params.nqn : subsys->parent_obj.id;
+
+ snprintf((char *)subsys->subnqn, sizeof(subsys->subnqn),
+ "nqn.2019-08.org.qemu:%s", nqn);
+}
+
+static void nvme_subsys_realize(DeviceState *dev, Error **errp)
+{
+ NvmeSubsystem *subsys = NVME_SUBSYS(dev);
+
+ nvme_subsys_setup(subsys);
+}
+
+static Property nvme_subsystem_props[] = {
+ DEFINE_PROP_STRING("nqn", NvmeSubsystem, params.nqn),
+ DEFINE_PROP_END_OF_LIST(),
+};
+
+static void nvme_subsys_class_init(ObjectClass *oc, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(oc);
+
+ set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
+
+ dc->realize = nvme_subsys_realize;
+ dc->desc = "Virtual NVMe subsystem";
+
+ device_class_set_props(dc, nvme_subsystem_props);
+}
+
+static const TypeInfo nvme_subsys_info = {
+ .name = TYPE_NVME_SUBSYS,
+ .parent = TYPE_DEVICE,
+ .class_init = nvme_subsys_class_init,
+ .instance_size = sizeof(NvmeSubsystem),
+};
+
+static void nvme_subsys_register_types(void)
+{
+ type_register_static(&nvme_subsys_info);
+}
+
+type_init(nvme_subsys_register_types)
diff --git a/hw/block/nvme.c b/hw/block/nvme.c
index fb83636abdc1..98bd987abccf 100644
--- a/hw/block/nvme.c
+++ b/hw/block/nvme.c
@@ -17,6 +17,7 @@
/**
* Usage: add options:
* -drive file=<file>,if=none,id=<drive_id>
+ * -device nvme-subsys,id=<subsys_id>,nqn=<nqn_id>
* -device nvme,serial=<serial>,id=<bus_name>, \
* cmb_size_mb=<cmb_size_mb[optional]>, \
* [pmrdev=<mem_backend_file_id>,] \
@@ -38,6 +39,17 @@
*
* The PMR will use BAR 4/5 exclusively.
*
+ * To place controller(s) and namespace(s) to a subsystem, then provide
+ * nvme-subsys device as above.
+ *
+ * nvme subsystem device parameters
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ * - `nqn`
+ * This parameter provides the `<nqn_id>` part of the string
+ * `nqn.2019-08.org.qemu:<nqn_id>` which will be reported in the SUBNQN field
+ * of subsystem controllers. Note that `<nqn_id>` should be unique per
+ * subsystem, but this is not enforced by QEMU. If not specified, it will
+ * default to the value of the `id` parameter (`<subsys_id>`).
*
* nvme device parameters
* ~~~~~~~~~~~~~~~~~~~~~~
diff --git a/hw/block/meson.build b/hw/block/meson.build
index 4bf994c64ff9..549282915521 100644
--- a/hw/block/meson.build
+++ b/hw/block/meson.build
@@ -13,7 +13,7 @@ softmmu_ss.add(when: 'CONFIG_SSI_M25P80', if_true:
files('m25p80.c'))
softmmu_ss.add(when: 'CONFIG_SWIM', if_true: files('swim.c'))
softmmu_ss.add(when: 'CONFIG_XEN', if_true: files('xen-block.c'))
softmmu_ss.add(when: 'CONFIG_TC58128', if_true: files('tc58128.c'))
-softmmu_ss.add(when: 'CONFIG_NVME_PCI', if_true: files('nvme.c', 'nvme-ns.c'))
+softmmu_ss.add(when: 'CONFIG_NVME_PCI', if_true: files('nvme.c', 'nvme-ns.c',
'nvme-subsys.c'))
specific_ss.add(when: 'CONFIG_VIRTIO_BLK', if_true: files('virtio-blk.c'))
specific_ss.add(when: 'CONFIG_VHOST_USER_BLK', if_true:
files('vhost-user-blk.c'))
--
2.30.1
- [PULL v2 00/38] emulated nvme device updates, Klaus Jensen, 2021/03/09
- [PULL v2 03/38] hw/block/nvme: add CMIC enum value for Identify Controller, Klaus Jensen, 2021/03/09
- [PULL v2 02/38] hw/block/nvme: support to map controller to a subsystem, Klaus Jensen, 2021/03/09
- [PULL v2 05/38] hw/block/nvme: add NMIC enum value for Identify Namespace, Klaus Jensen, 2021/03/09
- [PULL v2 01/38] hw/block/nvme: introduce nvme-subsys device,
Klaus Jensen <=
- [PULL v2 07/38] hw/block/nvme: remove unused parameter in check zone write, Klaus Jensen, 2021/03/09
- [PULL v2 06/38] hw/block/nvme: support for shared namespace in subsystem, Klaus Jensen, 2021/03/09
- [PULL v2 04/38] hw/block/nvme: support for multi-controller in subsystem, Klaus Jensen, 2021/03/09
- [PULL v2 09/38] hw/block/nvme: pull write pointer advancement to separate function, Klaus Jensen, 2021/03/09
- [PULL v2 08/38] hw/block/nvme: refactor zone resource management, Klaus Jensen, 2021/03/09
- [PULL v2 10/38] nvme: updated shared header for copy command, Klaus Jensen, 2021/03/09
- [PULL v2 11/38] hw/block/nvme: add simple copy command, Klaus Jensen, 2021/03/09
- [PULL v2 12/38] hw/block/nvme: fix Close Zone, Klaus Jensen, 2021/03/09
- [PULL v2 13/38] hw/block/nvme: add missing mor/mar constraint checks, Klaus Jensen, 2021/03/09
- [PULL v2 15/38] hw/block/nvme: use locally assigned QEMU IEEE OUI, Klaus Jensen, 2021/03/09