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7f0f1acedf
This adds support for multiple namespaces by introducing a new 'nvme-ns'
device model. The nvme device creates a bus named from the device name
('id'). The nvme-ns devices then connect to this and registers
themselves with the nvme device.
This changes how an nvme device is created. Example with two namespaces:
-drive file=nvme0n1.img,if=none,id=disk1
-drive file=nvme0n2.img,if=none,id=disk2
-device nvme,serial=deadbeef,id=nvme0
-device nvme-ns,drive=disk1,bus=nvme0,nsid=1
-device nvme-ns,drive=disk2,bus=nvme0,nsid=2
The drive property is kept on the nvme device to keep the change
backward compatible, but the property is now optional. Specifying a
drive for the nvme device will always create the namespace with nsid 1.
Signed-off-by: Klaus Jensen <k.jensen@samsung.com>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Minwoo Im <minwoo.im.dev@gmail.com>
75 lines
1.6 KiB
C
75 lines
1.6 KiB
C
/*
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* QEMU NVM Express Virtual Namespace
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*
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* Copyright (c) 2019 CNEX Labs
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* Copyright (c) 2020 Samsung Electronics
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*
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* Authors:
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* Klaus Jensen <k.jensen@samsung.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2. See the
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* COPYING file in the top-level directory.
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*
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*/
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#ifndef NVME_NS_H
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#define NVME_NS_H
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#define TYPE_NVME_NS "nvme-ns"
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#define NVME_NS(obj) \
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OBJECT_CHECK(NvmeNamespace, (obj), TYPE_NVME_NS)
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typedef struct NvmeNamespaceParams {
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uint32_t nsid;
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} NvmeNamespaceParams;
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typedef struct NvmeNamespace {
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DeviceState parent_obj;
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BlockConf blkconf;
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int32_t bootindex;
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int64_t size;
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NvmeIdNs id_ns;
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NvmeNamespaceParams params;
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} NvmeNamespace;
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static inline uint32_t nvme_nsid(NvmeNamespace *ns)
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{
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if (ns) {
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return ns->params.nsid;
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}
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return -1;
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}
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static inline NvmeLBAF *nvme_ns_lbaf(NvmeNamespace *ns)
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{
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NvmeIdNs *id_ns = &ns->id_ns;
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return &id_ns->lbaf[NVME_ID_NS_FLBAS_INDEX(id_ns->flbas)];
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}
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static inline uint8_t nvme_ns_lbads(NvmeNamespace *ns)
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{
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return nvme_ns_lbaf(ns)->ds;
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}
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/* calculate the number of LBAs that the namespace can accomodate */
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static inline uint64_t nvme_ns_nlbas(NvmeNamespace *ns)
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{
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return ns->size >> nvme_ns_lbads(ns);
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}
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/* convert an LBA to the equivalent in bytes */
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static inline size_t nvme_l2b(NvmeNamespace *ns, uint64_t lba)
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{
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return lba << nvme_ns_lbads(ns);
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}
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typedef struct NvmeCtrl NvmeCtrl;
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int nvme_ns_setup(NvmeCtrl *n, NvmeNamespace *ns, Error **errp);
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void nvme_ns_drain(NvmeNamespace *ns);
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void nvme_ns_flush(NvmeNamespace *ns);
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#endif /* NVME_NS_H */
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