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lightnvm: move ppa erase logic to core

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A device may function in single, dual or quad plane mode. The gennvm
media manager manages this with explicit helpers. They convert a single
ppa to 1, 2 or 4 separate ppas in a ppa list. To aid implementation of
recovery and system blocks, this functionality can be moved directly
into the core.

Signed-off-by: Matias Bjørling <m@bjorling.me>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Matias Bjørling 2016-01-12 07:49:19 +01:00 committed by Jens Axboe
parent c27278bddd
commit 069368e918
3 changed files with 74 additions and 64 deletions
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67
drivers/lightnvm/core.c
View File

@ -192,6 +192,73 @@ int nvm_erase_blk(struct nvm_dev *dev, struct nvm_block *blk)
}
EXPORT_SYMBOL(nvm_erase_blk);
void nvm_addr_to_generic_mode(struct nvm_dev *dev, struct nvm_rq *rqd)
{
int i;
if (rqd->nr_pages > 1) {
for (i = 0; i < rqd->nr_pages; i++)
rqd->ppa_list[i] = dev_to_generic_addr(dev,
rqd->ppa_list[i]);
} else {
rqd->ppa_addr = dev_to_generic_addr(dev, rqd->ppa_addr);
}
}
EXPORT_SYMBOL(nvm_addr_to_generic_mode);
void nvm_generic_to_addr_mode(struct nvm_dev *dev, struct nvm_rq *rqd)
{
int i;
if (rqd->nr_pages > 1) {
for (i = 0; i < rqd->nr_pages; i++)
rqd->ppa_list[i] = generic_to_dev_addr(dev,
rqd->ppa_list[i]);
} else {
rqd->ppa_addr = generic_to_dev_addr(dev, rqd->ppa_addr);
}
}
EXPORT_SYMBOL(nvm_generic_to_addr_mode);
int nvm_erase_ppa(struct nvm_dev *dev, struct ppa_addr ppa)
{
int plane_cnt = 0, pl_idx, ret;
struct nvm_rq rqd;
if (!dev->ops->erase_block)
return 0;
if (dev->plane_mode == NVM_PLANE_SINGLE) {
rqd.nr_pages = 1;
rqd.ppa_addr = ppa;
} else {
plane_cnt = (1 << dev->plane_mode);
rqd.nr_pages = plane_cnt;
rqd.ppa_list = nvm_dev_dma_alloc(dev, GFP_KERNEL,
&rqd.dma_ppa_list);
if (!rqd.ppa_list) {
pr_err("nvm: failed to allocate dma memory\n");
return -ENOMEM;
}
for (pl_idx = 0; pl_idx < plane_cnt; pl_idx++) {
ppa.g.pl = pl_idx;
rqd.ppa_list[pl_idx] = ppa;
}
}
nvm_generic_to_addr_mode(dev, &rqd);
ret = dev->ops->erase_block(dev, &rqd);
if (plane_cnt)
nvm_dev_dma_free(dev, rqd.ppa_list, rqd.dma_ppa_list);
return ret;
}
EXPORT_SYMBOL(nvm_erase_ppa);
static int nvm_core_init(struct nvm_dev *dev)
{
struct nvm_id *id = &dev->identity;

68
drivers/lightnvm/gennvm.c
View File

@ -317,39 +317,13 @@ static void gennvm_put_blk(struct nvm_dev *dev, struct nvm_block *blk)
spin_unlock(&vlun->lock);
}
static void gennvm_addr_to_generic_mode(struct nvm_dev *dev, struct nvm_rq *rqd)
{
int i;
if (rqd->nr_pages > 1) {
for (i = 0; i < rqd->nr_pages; i++)
rqd->ppa_list[i] = dev_to_generic_addr(dev,
rqd->ppa_list[i]);
} else {
rqd->ppa_addr = dev_to_generic_addr(dev, rqd->ppa_addr);
}
}
static void gennvm_generic_to_addr_mode(struct nvm_dev *dev, struct nvm_rq *rqd)
{
int i;
if (rqd->nr_pages > 1) {
for (i = 0; i < rqd->nr_pages; i++)
rqd->ppa_list[i] = generic_to_dev_addr(dev,
rqd->ppa_list[i]);
} else {
rqd->ppa_addr = generic_to_dev_addr(dev, rqd->ppa_addr);
}
}
static int gennvm_submit_io(struct nvm_dev *dev, struct nvm_rq *rqd)
{
if (!dev->ops->submit_io)
return -ENODEV;
/* Convert address space */
gennvm_generic_to_addr_mode(dev, rqd);
nvm_generic_to_addr_mode(dev, rqd);
rqd->dev = dev;
return dev->ops->submit_io(dev, rqd);
@ -391,7 +365,7 @@ static void gennvm_mark_blk_bad(struct nvm_dev *dev, struct nvm_rq *rqd)
if (dev->ops->set_bb_tbl(dev, rqd, 1))
return;
gennvm_addr_to_generic_mode(dev, rqd);
nvm_addr_to_generic_mode(dev, rqd);
/* look up blocks and mark them as bad */
if (rqd->nr_pages > 1)
@ -425,43 +399,9 @@ static int gennvm_end_io(struct nvm_rq *rqd, int error)
static int gennvm_erase_blk(struct nvm_dev *dev, struct nvm_block *blk,
unsigned long flags)
{
int plane_cnt = 0, pl_idx, ret;
struct ppa_addr addr;
struct nvm_rq rqd;
struct ppa_addr addr = block_to_ppa(dev, blk);
if (!dev->ops->erase_block)
return 0;
addr = block_to_ppa(dev, blk);
if (dev->plane_mode == NVM_PLANE_SINGLE) {
rqd.nr_pages = 1;
rqd.ppa_addr = addr;
} else {
plane_cnt = (1 << dev->plane_mode);
rqd.nr_pages = plane_cnt;
rqd.ppa_list = nvm_dev_dma_alloc(dev, GFP_KERNEL,
&rqd.dma_ppa_list);
if (!rqd.ppa_list) {
pr_err("gennvm: failed to allocate dma memory\n");
return -ENOMEM;
}
for (pl_idx = 0; pl_idx < plane_cnt; pl_idx++) {
addr.g.pl = pl_idx;
rqd.ppa_list[pl_idx] = addr;
}
}
gennvm_generic_to_addr_mode(dev, &rqd);
ret = dev->ops->erase_block(dev, &rqd);
if (plane_cnt)
nvm_dev_dma_free(dev, rqd.ppa_list, rqd.dma_ppa_list);
return ret;
return nvm_erase_ppa(dev, addr);
}
static struct nvm_lun *gennvm_get_lun(struct nvm_dev *dev, int lunid)

3
include/linux/lightnvm.h
View File

@ -427,6 +427,9 @@ extern int nvm_register(struct request_queue *, char *,
extern void nvm_unregister(char *);
extern int nvm_submit_io(struct nvm_dev *, struct nvm_rq *);
extern void nvm_generic_to_addr_mode(struct nvm_dev *, struct nvm_rq *);
extern void nvm_addr_to_generic_mode(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 *);
#else /* CONFIG_NVM */
struct nvm_dev_ops;