dasharo/linux
0
0
Fork 0
mirror of https://github.com/Dasharo/linux.git synced 2026-03-06 15:25:10 -08:00
Code Issues Packages Projects Releases Wiki Activity

nvme: submit internal commands through the block layer

Browse Source 
Use block layer queues with an internal cmd_type to submit internally
generated NVMe commands.  This both simplifies the code a lot and allow
for a better structure.  For example now the LighNVM code can construct
commands without knowing the details of the underlying I/O descriptors.
Or a future NVMe over network target could inject commands, as well as
could the SCSI translation and ioctl code be reused for such a beast.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Christoph Hellwig
2015-05-22 11:12:46 +02:00
committed by Jens Axboe
parent 772ce43559
commit d29ec8241c
3 changed files with 300 additions and 545 deletions
Download Patch File Download Diff File Expand all files Collapse all files

399
drivers/block/nvme-core.c
View File

File diff suppressed because it is too large Load Diff

422
drivers/block/nvme-scsi.c
View File

File diff suppressed because it is too large Load Diff

24
include/linux/nvme.h
View File

@@ -146,21 +146,15 @@ static inline u64 nvme_block_nr(struct nvme_ns *ns, sector_t sector)
return (sector >> (ns->lba_shift - 9));
}
/**
* nvme_free_iod - frees an nvme_iod
* @dev: The device that the I/O was submitted to
* @iod: The memory to free
*/
void nvme_free_iod(struct nvme_dev *dev, struct nvme_iod *iod);
int nvme_setup_prps(struct nvme_dev *, struct nvme_iod *, int, gfp_t);
struct nvme_iod *nvme_map_user_pages(struct nvme_dev *dev, int write,
unsigned long addr, unsigned length);
void nvme_unmap_user_pages(struct nvme_dev *dev, int write,
struct nvme_iod *iod);
int nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd);
int nvme_identify(struct nvme_dev *, unsigned nsid, unsigned cns,
dma_addr_t dma_addr);
int nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd,
void *buf, unsigned bufflen);
int __nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd,
void *buffer, void __user *ubuffer, unsigned bufflen,
u32 *result, unsigned timeout);
int nvme_identify_ctrl(struct nvme_dev *dev, struct nvme_id_ctrl **id);
int nvme_identify_ns(struct nvme_dev *dev, unsigned nsid,
struct nvme_id_ns **id);
int nvme_get_log_page(struct nvme_dev *dev, struct nvme_smart_log **log);
int nvme_get_features(struct nvme_dev *dev, unsigned fid, unsigned nsid,
dma_addr_t dma_addr, u32 *result);
int nvme_set_features(struct nvme_dev *dev, unsigned fid, unsigned dword11,