[커널] nvme device driver 분석 자료구조

struct nvme_dev {
	struct nvme_queue *queues;
	struct blk_mq_tag_set tagset;
	struct blk_mq_tag_set admin_tagset;
	u32 __iomem *dbs;
	struct device *dev;
	struct dma_pool *prp_page_pool;
	struct dma_pool *prp_small_pool;
	unsigned online_queues;
	unsigned max_qid;
	int q_depth;
	u32 db_stride;
	void __iomem *bar;
	unsigned long bar_mapped_size;
	struct work_struct remove_work;
	struct mutex shutdown_lock;
	bool subsystem;
	void __iomem *cmb;
	pci_bus_addr_t cmb_bus_addr;
	u64 cmb_size;
	u32 cmbsz;
	u32 cmbloc;
	struct nvme_ctrl ctrl;
	struct completion ioq_wait;

	/* shadow doorbell buffer support: */
	u32 *dbbuf_dbs;
	dma_addr_t dbbuf_dbs_dma_addr;
	u32 *dbbuf_eis;
	dma_addr_t dbbuf_eis_dma_addr;

	/* host memory buffer support: */
	u64 host_mem_size;
	u32 nr_host_mem_descs;
	dma_addr_t host_mem_descs_dma;
	struct nvme_host_mem_buf_desc *host_mem_descs;
	void **host_mem_desc_bufs;
};