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lightnvm: implement nvm_submit_ppa_list 

The nvm_submit_ppa function assumes that users manage all plane
blocks as a single block. Extend the API with nvm_submit_ppa_list
to allow the user to send its own ppa list. If the user submits more
than a single PPA, the user must take care to allocate and free
the corresponding ppa list.

Reviewed by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Matias Bjørling <m@bjorling.me>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Matias Bjørling 2016-05-06 20:02:56 +02:00 committed by Jens Axboe
parent ecfb40c6aa
commit 1145e6351a
2 changed files with 71 additions and 19 deletions
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88
drivers/lightnvm/core.c
View File

@ -322,11 +322,10 @@ static void nvm_end_io_sync(struct nvm_rq *rqd)
complete(waiting);
}
int nvm_submit_ppa(struct nvm_dev *dev, struct ppa_addr *ppa, int nr_ppas,
int opcode, int flags, void *buf, int len)
int __nvm_submit_ppa(struct nvm_dev *dev, struct nvm_rq *rqd, int opcode,
int flags, void *buf, int len)
{
DECLARE_COMPLETION_ONSTACK(wait);
struct nvm_rq rqd;
struct bio *bio;
int ret;
unsigned long hang_check;
@ -335,24 +334,17 @@ int nvm_submit_ppa(struct nvm_dev *dev, struct ppa_addr *ppa, int nr_ppas,
if (IS_ERR_OR_NULL(bio))
return -ENOMEM;
memset(&rqd, 0, sizeof(struct nvm_rq));
ret = nvm_set_rqd_ppalist(dev, &rqd, ppa, nr_ppas);
if (ret) {
bio_put(bio);
return ret;
}
nvm_generic_to_addr_mode(dev, rqd);
rqd.opcode = opcode;
rqd.bio = bio;
rqd.wait = &wait;
rqd.dev = dev;
rqd.end_io = nvm_end_io_sync;
rqd.flags = flags;
nvm_generic_to_addr_mode(dev, &rqd);
rqd->dev = dev;
rqd->opcode = opcode;
rqd->flags = flags;
rqd->bio = bio;
rqd->wait = &wait;
rqd->end_io = nvm_end_io_sync;
ret = dev->ops->submit_io(dev, &rqd);
ret = dev->ops->submit_io(dev, rqd);
if (ret) {
nvm_free_rqd_ppalist(dev, &rqd);
bio_put(bio);
return ret;
}
@ -364,9 +356,67 @@ int nvm_submit_ppa(struct nvm_dev *dev, struct ppa_addr *ppa, int nr_ppas,
else
wait_for_completion_io(&wait);
return rqd->error;
}
/**
* nvm_submit_ppa_list - submit user-defined ppa list to device. The user must
* take to free ppa list if necessary.
* @dev: device
* @ppa_list: user created ppa_list
* @nr_ppas: length of ppa_list
* @opcode: device opcode
* @flags: device flags
* @buf: data buffer
* @len: data buffer length
*/
int nvm_submit_ppa_list(struct nvm_dev *dev, struct ppa_addr *ppa_list,
int nr_ppas, int opcode, int flags, void *buf, int len)
{
struct nvm_rq rqd;
if (dev->ops->max_phys_sect < nr_ppas)
return -EINVAL;
memset(&rqd, 0, sizeof(struct nvm_rq));
rqd.nr_pages = nr_ppas;
if (nr_ppas > 1)
rqd.ppa_list = ppa_list;
else
rqd.ppa_addr = ppa_list[0];
return __nvm_submit_ppa(dev, &rqd, opcode, flags, buf, len);
}
EXPORT_SYMBOL(nvm_submit_ppa_list);
/**
* nvm_submit_ppa - submit PPAs to device. PPAs will automatically be unfolded
* as single, dual, quad plane PPAs depending on device type.
* @dev: device
* @ppa: user created ppa_list
* @nr_ppas: length of ppa_list
* @opcode: device opcode
* @flags: device flags
* @buf: data buffer
* @len: data buffer length
*/
int nvm_submit_ppa(struct nvm_dev *dev, struct ppa_addr *ppa, int nr_ppas,
int opcode, int flags, void *buf, int len)
{
struct nvm_rq rqd;
int ret;
memset(&rqd, 0, sizeof(struct nvm_rq));
ret = nvm_set_rqd_ppalist(dev, &rqd, ppa, nr_ppas);
if (ret)
return ret;
ret = __nvm_submit_ppa(dev, &rqd, opcode, flags, buf, len);
nvm_free_rqd_ppalist(dev, &rqd);
return rqd.error;
return ret;
}
EXPORT_SYMBOL(nvm_submit_ppa);

2
include/linux/lightnvm.h
View File

@ -534,6 +534,8 @@ extern int nvm_erase_blk(struct nvm_dev *, struct nvm_block *);
extern void nvm_end_io(struct nvm_rq *, int);
extern int nvm_submit_ppa(struct nvm_dev *, struct ppa_addr *, int, int, int,
void *, int);
extern int nvm_submit_ppa_list(struct nvm_dev *, struct ppa_addr *, int, int,
int, void *, int);
/* sysblk.c */
#define NVM_SYSBLK_MAGIC 0x4E564D53 /* "NVMS" */