++++++++++++++++++++++++++++++++
Page Cache
buffer_head
++++++++++++++++++++++++++++++++
Generic Block Layer
bio/request
++++++++++++++++++++++++++++++++
Official NVMe Driver
/dev/nvme0n1
make_request_fn bio->LBA CMD
++++++++++++++++++++++++++++++++
Controller
FW+Logic
(FTL, Checkpoint, gc, WL, error-handle)
++++++++++++++++++++++++++++++++
NandFlash
++++++++++++++++++++++++++++++++
Page Cache
buffer_head
++++++++++++++++++++++++++++++++
Generic Block Layer
bio
++++++++++++++++++++++++++++++++
FSCFTL
/dev/nvme0n1_exp1
make_request_fn
bio->request
fullfill ppa cmd
(FTL Checkpoint gc WL error-handle)
++++++++++++++++++++++++++++++++
Official NVMe Driver
NVMe (dma_map irq hwqueue)
++++++++++++++++++++++++++++++++
Controller
FW+Logic
++++++++++++++++++++++++++++++++
NandFlash
++++++++++++++++++++++++++++++++