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lightnvm: use end_io callback instead of instance

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When the lightnvm core had the "gennvm" layer between the device and the
target, there was a need for the core to be able to figure out which
target it should send an end_io callback to. Leading to a "double"
end_io, first for the media manager instance, and then for the target
instance. Now that core and gennvm is merged, there is no longer a need
for this, and a single end_io callback will do.

Signed-off-by: Matias Bjørling <matias@cnexlabs.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Matias Bjørling 2017-01-31 13:17:17 +01:00 • committed by Jens Axboe
parent 84d4add793
commit 06894efea7
6 changed files with 13 additions and 20 deletions
Download patch file Download diff file Expand all files Collapse all files

3
drivers/block/null_blk.c
View file

@ -420,7 +420,8 @@ static void null_lnvm_end_io(struct request *rq, int error)
{ {
struct nvm_rq *rqd = rq->end_io_data; struct nvm_rq *rqd = rq->end_io_data;
nvm_end_io(rqd, error); rqd->error = error;
nvm_end_io(rqd);
blk_put_request(rq); blk_put_request(rq);
} }

7
drivers/lightnvm/core.c
View file

@ -773,17 +773,16 @@ void nvm_free_rqd_ppalist(struct nvm_dev *dev, struct nvm_rq *rqd)
} }
EXPORT_SYMBOL(nvm_free_rqd_ppalist); EXPORT_SYMBOL(nvm_free_rqd_ppalist);
void nvm_end_io(struct nvm_rq *rqd, int error) void nvm_end_io(struct nvm_rq *rqd)
{ {
struct nvm_tgt_dev *tgt_dev = rqd->dev; struct nvm_tgt_dev *tgt_dev = rqd->dev;
struct nvm_tgt_instance *ins = rqd->ins;
/* Convert address space */ /* Convert address space */
if (tgt_dev) if (tgt_dev)
nvm_rq_dev_to_tgt(tgt_dev, rqd); nvm_rq_dev_to_tgt(tgt_dev, rqd);
rqd->error = error; if (rqd->end_io)
ins->tt->end_io(rqd); rqd->end_io(rqd);
} }
EXPORT_SYMBOL(nvm_end_io); EXPORT_SYMBOL(nvm_end_io);

7
drivers/lightnvm/rrpc.c
View file

@ -779,7 +779,7 @@ static void rrpc_end_io_write(struct rrpc *rrpc, struct rrpc_rq *rrqd,
static void rrpc_end_io(struct nvm_rq *rqd) static void rrpc_end_io(struct nvm_rq *rqd)
{ {
struct rrpc *rrpc = container_of(rqd->ins, struct rrpc, instance); struct rrpc *rrpc = rqd->private;
struct nvm_tgt_dev *dev = rrpc->dev; struct nvm_tgt_dev *dev = rrpc->dev;
struct rrpc_rq *rrqd = nvm_rq_to_pdu(rqd); struct rrpc_rq *rrqd = nvm_rq_to_pdu(rqd);
uint8_t npages = rqd->nr_ppas; uint8_t npages = rqd->nr_ppas;
@ -972,8 +972,9 @@ static int rrpc_submit_io(struct rrpc *rrpc, struct bio *bio,
bio_get(bio); bio_get(bio);
rqd->bio = bio; rqd->bio = bio;
rqd->ins = &rrpc->instance; rqd->private = rrpc;
rqd->nr_ppas = nr_pages; rqd->nr_ppas = nr_pages;
rqd->end_io = rrpc_end_io;
rrq->flags = flags; rrq->flags = flags;
err = nvm_submit_io(dev, rqd); err = nvm_submit_io(dev, rqd);
@ -1532,7 +1533,6 @@ static void *rrpc_init(struct nvm_tgt_dev *dev, struct gendisk *tdisk)
if (!rrpc) if (!rrpc)
return ERR_PTR(-ENOMEM); return ERR_PTR(-ENOMEM);
rrpc->instance.tt = &tt_rrpc;
rrpc->dev = dev; rrpc->dev = dev;
rrpc->disk = tdisk; rrpc->disk = tdisk;
@ -1611,7 +1611,6 @@ static struct nvm_tgt_type tt_rrpc = {
.make_rq = rrpc_make_rq, .make_rq = rrpc_make_rq,
.capacity = rrpc_capacity, .capacity = rrpc_capacity,
.end_io = rrpc_end_io,
.init = rrpc_init, .init = rrpc_init,
.exit = rrpc_exit, .exit = rrpc_exit,

3
drivers/lightnvm/rrpc.h
View file

@ -102,9 +102,6 @@ struct rrpc_lun {
}; };
struct rrpc { struct rrpc {
/* instance must be kept in top to resolve rrpc in unprep */
struct nvm_tgt_instance instance;
struct nvm_tgt_dev *dev; struct nvm_tgt_dev *dev;
struct gendisk *disk; struct gendisk *disk;

3
drivers/nvme/host/lightnvm.c
View file

@ -484,7 +484,8 @@ static void nvme_nvm_end_io(struct request *rq, int error)
struct nvm_rq *rqd = rq->end_io_data; struct nvm_rq *rqd = rq->end_io_data;
rqd->ppa_status = nvme_req(rq)->result.u64; rqd->ppa_status = nvme_req(rq)->result.u64;
nvm_end_io(rqd, error); rqd->error = error;
nvm_end_io(rqd);
kfree(nvme_req(rq)->cmd); kfree(nvme_req(rq)->cmd);
blk_mq_free_request(rq); blk_mq_free_request(rq);

10
include/linux/lightnvm.h
View file

@ -213,10 +213,6 @@ struct nvm_target {
struct gendisk *disk; struct gendisk *disk;
}; };
struct nvm_tgt_instance {
struct nvm_tgt_type *tt;
};
#define ADDR_EMPTY (~0ULL) #define ADDR_EMPTY (~0ULL)
#define NVM_VERSION_MAJOR 1 #define NVM_VERSION_MAJOR 1
@ -227,7 +223,6 @@ struct nvm_rq;
typedef void (nvm_end_io_fn)(struct nvm_rq *); typedef void (nvm_end_io_fn)(struct nvm_rq *);
struct nvm_rq { struct nvm_rq {
struct nvm_tgt_instance *ins;
struct nvm_tgt_dev *dev; struct nvm_tgt_dev *dev;
struct bio *bio; struct bio *bio;
@ -251,6 +246,8 @@ struct nvm_rq {
u64 ppa_status; /* ppa media status */ u64 ppa_status; /* ppa media status */
int error; int error;
void *private;
}; };
static inline struct nvm_rq *nvm_rq_from_pdu(void *pdu) static inline struct nvm_rq *nvm_rq_from_pdu(void *pdu)
@ -450,7 +447,6 @@ struct nvm_tgt_type {
/* target entry points */ /* target entry points */
nvm_tgt_make_rq_fn *make_rq; nvm_tgt_make_rq_fn *make_rq;
nvm_tgt_capacity_fn *capacity; nvm_tgt_capacity_fn *capacity;
nvm_end_io_fn *end_io;
/* module-specific init/teardown */ /* module-specific init/teardown */
nvm_tgt_init_fn *init; nvm_tgt_init_fn *init;
@ -484,7 +480,7 @@ extern int nvm_get_l2p_tbl(struct nvm_tgt_dev *, u64, u32, nvm_l2p_update_fn *,
void *); void *);
extern int nvm_get_area(struct nvm_tgt_dev *, sector_t *, sector_t); extern int nvm_get_area(struct nvm_tgt_dev *, sector_t *, sector_t);
extern void nvm_put_area(struct nvm_tgt_dev *, sector_t); extern void nvm_put_area(struct nvm_tgt_dev *, sector_t);
extern void nvm_end_io(struct nvm_rq *, int); extern void nvm_end_io(struct nvm_rq *);
extern int nvm_bb_tbl_fold(struct nvm_dev *, u8 *, int); extern int nvm_bb_tbl_fold(struct nvm_dev *, u8 *, int);
extern int nvm_get_tgt_bb_tbl(struct nvm_tgt_dev *, struct ppa_addr, u8 *); extern int nvm_get_tgt_bb_tbl(struct nvm_tgt_dev *, struct ppa_addr, u8 *);