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| author | Matias Bjørling <m@bjorling.me> | 2016-01-12 07:49:21 +0100 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2016-01-12 16:21:16 +0100 |
| commit | 91276162de9476b8ff32d9452e849210e5dd09e9 (patch) | |
| tree | 53337c60f7d863b1ab733f9bcd4964da818f9057 /include | |
| parent | lightnvm: refactor rqd ppa list into set/free (diff) | |
| download | linux-91276162de9476b8ff32d9452e849210e5dd09e9.tar.xz linux-91276162de9476b8ff32d9452e849210e5dd09e9.zip | |
lightnvm: refactor end_io functions for sync
To implement sync I/O support within the LightNVM core, the end_io
functions are refactored to take an end_io function pointer instead of
testing for initialized media manager, followed by calling its end_io
function.
Sync I/O can then be implemented using a callback that signal I/O
completion. This is similar to the logic found in blk_to_execute_io().
By implementing it this way, the underlying device I/Os submission logic
is abstracted away from core, targets, and media managers.
Signed-off-by: Matias Bjørling <m@bjorling.me>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/lightnvm.h | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/include/linux/lightnvm.h b/include/linux/lightnvm.h index 2fd6871ac7f5..9c9fe9ca0441 100644 --- a/include/linux/lightnvm.h +++ b/include/linux/lightnvm.h @@ -148,6 +148,9 @@ struct ppa_addr { }; }; +struct nvm_rq; +typedef void (nvm_end_io_fn)(struct nvm_rq *, int); + struct nvm_rq { struct nvm_tgt_instance *ins; struct nvm_dev *dev; @@ -164,6 +167,9 @@ struct nvm_rq { void *metadata; dma_addr_t dma_metadata; + struct completion *wait; + nvm_end_io_fn *end_io; + uint8_t opcode; uint16_t nr_pages; uint16_t flags; @@ -347,7 +353,6 @@ static inline struct ppa_addr block_to_ppa(struct nvm_dev *dev, typedef blk_qc_t (nvm_tgt_make_rq_fn)(struct request_queue *, struct bio *); typedef sector_t (nvm_tgt_capacity_fn)(void *); -typedef int (nvm_tgt_end_io_fn)(struct nvm_rq *, int); typedef void *(nvm_tgt_init_fn)(struct nvm_dev *, struct gendisk *, int, int); typedef void (nvm_tgt_exit_fn)(void *); @@ -358,7 +363,7 @@ struct nvm_tgt_type { /* target entry points */ nvm_tgt_make_rq_fn *make_rq; nvm_tgt_capacity_fn *capacity; - nvm_tgt_end_io_fn *end_io; + nvm_end_io_fn *end_io; /* module-specific init/teardown */ nvm_tgt_init_fn *init; @@ -383,7 +388,6 @@ typedef int (nvmm_open_blk_fn)(struct nvm_dev *, struct nvm_block *); typedef int (nvmm_close_blk_fn)(struct nvm_dev *, struct nvm_block *); typedef void (nvmm_flush_blk_fn)(struct nvm_dev *, struct nvm_block *); typedef int (nvmm_submit_io_fn)(struct nvm_dev *, struct nvm_rq *); -typedef int (nvmm_end_io_fn)(struct nvm_rq *, int); typedef int (nvmm_erase_blk_fn)(struct nvm_dev *, struct nvm_block *, unsigned long); typedef struct nvm_lun *(nvmm_get_lun_fn)(struct nvm_dev *, int); @@ -404,7 +408,6 @@ struct nvmm_type { nvmm_flush_blk_fn *flush_blk; nvmm_submit_io_fn *submit_io; - nvmm_end_io_fn *end_io; nvmm_erase_blk_fn *erase_blk; /* Configuration management */ @@ -434,6 +437,7 @@ extern int nvm_set_rqd_ppalist(struct nvm_dev *, struct nvm_rq *, extern void nvm_free_rqd_ppalist(struct nvm_dev *, struct nvm_rq *); extern int nvm_erase_ppa(struct nvm_dev *, struct ppa_addr); extern int nvm_erase_blk(struct nvm_dev *, struct nvm_block *); +extern void nvm_end_io(struct nvm_rq *, int); #else /* CONFIG_NVM */ struct nvm_dev_ops; |