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lightnvm: move device L2P detection to core 

A 1.2 device is able to manage the logical to physical mapping
table internally or leave it to the host.

A target only supports one of those approaches, and therefore must
check on initialization. Move this check to core to avoid each target
implement the check.

Signed-off-by: Matias Bjørling <mb@lightnvm.io>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Matias Bjørling 2018-10-09 13:11:34 +02:00 committed by Jens Axboe
parent 4b5d56edb8
commit 656e33ca3d
3 changed files with 11 additions and 7 deletions
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5
drivers/lightnvm/core.c
View File

@ -355,6 +355,11 @@ static int nvm_create_tgt(struct nvm_dev *dev, struct nvm_ioctl_create *create)
return -EINVAL;
}
if ((tt->flags & NVM_TGT_F_HOST_L2P) != (dev->geo.dom & NVM_RSP_L2P)) {
pr_err("nvm: device is incompatible with target L2P type.\n");
return -EINVAL;
}
if (nvm_target_exists(create->tgtname)) {
pr_err("nvm: target name already exists (%s)\n",
create->tgtname);

7
drivers/lightnvm/pblk-init.c
View File

@ -1210,13 +1210,6 @@ static void *pblk_init(struct nvm_tgt_dev *dev, struct gendisk *tdisk,
return ERR_PTR(-EINVAL);
}
if (geo->version == NVM_OCSSD_SPEC_12 && geo->dom & NVM_RSP_L2P) {
pblk_err(pblk, "host-side L2P table not supported. (%x)\n",
geo->dom);
kfree(pblk);
return ERR_PTR(-EINVAL);
}
spin_lock_init(&pblk->resubmit_lock);
spin_lock_init(&pblk->trans_lock);
spin_lock_init(&pblk->lock);

6
include/linux/lightnvm.h
View File

@ -495,9 +495,15 @@ typedef void (nvm_tgt_exit_fn)(void *, bool);
typedef int (nvm_tgt_sysfs_init_fn)(struct gendisk *);
typedef void (nvm_tgt_sysfs_exit_fn)(struct gendisk *);
enum {
NVM_TGT_F_DEV_L2P = 0,
NVM_TGT_F_HOST_L2P = 1 << 0,
};
struct nvm_tgt_type {
const char *name;
unsigned int version[3];
int flags;
/* target entry points */
nvm_tgt_make_rq_fn *make_rq;