aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/lightnvm
diff options
context:
space:
mode:
authorJavier González <javier@cnexlabs.com>2018-01-05 14:16:14 +0100
committerJens Axboe <axboe@kernel.dk>2018-01-05 08:50:12 -0700
commite53927393b9987b7c986b6364c27111077f0ea3e (patch)
tree86876ba02fe38ea054b8c58f529a234df8a948f8 /drivers/lightnvm
parenta7689938ef4c8678ff78c44d11e4b0b897244714 (diff)
lightnvm: set target over-provision on create ioctl
Allow to set the over-provision percentage on target creation. In case that the value is not provided, fall back to the default value set by the target. In pblk, set the default OP to 11% of the total size of the device Signed-off-by: Javier González <javier@cnexlabs.com> Signed-off-by: Hans Holmberg <hans.holmberg@cnexlabs.com> Signed-off-by: Matias Bjørling <m@bjorling.me> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/lightnvm')
-rw-r--r--drivers/lightnvm/core.c106
-rw-r--r--drivers/lightnvm/pblk-init.c5
-rw-r--r--drivers/lightnvm/pblk.h2
3 files changed, 89 insertions, 24 deletions
diff --git a/drivers/lightnvm/core.c b/drivers/lightnvm/core.c
index d5f231c9339e..dcc9e621e651 100644
--- a/drivers/lightnvm/core.c
+++ b/drivers/lightnvm/core.c
@@ -140,7 +140,8 @@ static void nvm_remove_tgt_dev(struct nvm_tgt_dev *tgt_dev, int clear)
}
static struct nvm_tgt_dev *nvm_create_tgt_dev(struct nvm_dev *dev,
- int lun_begin, int lun_end)
+ u16 lun_begin, u16 lun_end,
+ u16 op)
{
struct nvm_tgt_dev *tgt_dev = NULL;
struct nvm_dev_map *dev_rmap = dev->rmap;
@@ -219,6 +220,7 @@ static struct nvm_tgt_dev *nvm_create_tgt_dev(struct nvm_dev *dev,
tgt_dev->geo.nr_chnls = nr_chnls;
tgt_dev->geo.all_luns = nr_luns;
tgt_dev->geo.nr_luns = (lun_balanced) ? prev_nr_luns : -1;
+ tgt_dev->geo.op = op;
tgt_dev->total_secs = nr_luns * tgt_dev->geo.sec_per_lun;
tgt_dev->q = dev->q;
tgt_dev->map = dev_map;
@@ -266,9 +268,57 @@ static struct nvm_tgt_type *nvm_find_target_type(const char *name)
return tt;
}
+static int nvm_config_check_luns(struct nvm_geo *geo, int lun_begin,
+ int lun_end)
+{
+ if (lun_begin > lun_end || lun_end >= geo->all_luns) {
+ pr_err("nvm: lun out of bound (%u:%u > %u)\n",
+ lun_begin, lun_end, geo->all_luns - 1);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int __nvm_config_simple(struct nvm_dev *dev,
+ struct nvm_ioctl_create_simple *s)
+{
+ struct nvm_geo *geo = &dev->geo;
+
+ if (s->lun_begin == -1 && s->lun_end == -1) {
+ s->lun_begin = 0;
+ s->lun_end = geo->all_luns - 1;
+ }
+
+ return nvm_config_check_luns(geo, s->lun_begin, s->lun_end);
+}
+
+static int __nvm_config_extended(struct nvm_dev *dev,
+ struct nvm_ioctl_create_extended *e)
+{
+ struct nvm_geo *geo = &dev->geo;
+
+ if (e->lun_begin == 0xFFFF && e->lun_end == 0xFFFF) {
+ e->lun_begin = 0;
+ e->lun_end = dev->geo.all_luns - 1;
+ }
+
+ /* op not set falls into target's default */
+ if (e->op == 0xFFFF)
+ e->op = NVM_TARGET_DEFAULT_OP;
+
+ if (e->op < NVM_TARGET_MIN_OP ||
+ e->op > NVM_TARGET_MAX_OP) {
+ pr_err("nvm: invalid over provisioning value\n");
+ return -EINVAL;
+ }
+
+ return nvm_config_check_luns(geo, e->lun_begin, e->lun_end);
+}
+
static int nvm_create_tgt(struct nvm_dev *dev, struct nvm_ioctl_create *create)
{
- struct nvm_ioctl_create_simple *s = &create->conf.s;
+ struct nvm_ioctl_create_extended e;
struct request_queue *tqueue;
struct gendisk *tdisk;
struct nvm_tgt_type *tt;
@@ -277,6 +327,28 @@ static int nvm_create_tgt(struct nvm_dev *dev, struct nvm_ioctl_create *create)
void *targetdata;
int ret;
+ switch (create->conf.type) {
+ case NVM_CONFIG_TYPE_SIMPLE:
+ ret = __nvm_config_simple(dev, &create->conf.s);
+ if (ret)
+ return ret;
+
+ e.lun_begin = create->conf.s.lun_begin;
+ e.lun_end = create->conf.s.lun_end;
+ e.op = NVM_TARGET_DEFAULT_OP;
+ break;
+ case NVM_CONFIG_TYPE_EXTENDED:
+ ret = __nvm_config_extended(dev, &create->conf.e);
+ if (ret)
+ return ret;
+
+ e = create->conf.e;
+ break;
+ default:
+ pr_err("nvm: config type not valid\n");
+ return -EINVAL;
+ }
+
tt = nvm_find_target_type(create->tgttype);
if (!tt) {
pr_err("nvm: target type %s not found\n", create->tgttype);
@@ -289,7 +361,7 @@ static int nvm_create_tgt(struct nvm_dev *dev, struct nvm_ioctl_create *create)
return -EINVAL;
}
- ret = nvm_reserve_luns(dev, s->lun_begin, s->lun_end);
+ ret = nvm_reserve_luns(dev, e.lun_begin, e.lun_end);
if (ret)
return ret;
@@ -299,7 +371,7 @@ static int nvm_create_tgt(struct nvm_dev *dev, struct nvm_ioctl_create *create)
goto err_reserve;
}
- tgt_dev = nvm_create_tgt_dev(dev, s->lun_begin, s->lun_end);
+ tgt_dev = nvm_create_tgt_dev(dev, e.lun_begin, e.lun_end, e.op);
if (!tgt_dev) {
pr_err("nvm: could not create target device\n");
ret = -ENOMEM;
@@ -369,7 +441,7 @@ err_dev:
err_t:
kfree(t);
err_reserve:
- nvm_release_luns_err(dev, s->lun_begin, s->lun_end);
+ nvm_release_luns_err(dev, e.lun_begin, e.lun_end);
return ret;
}
@@ -949,7 +1021,6 @@ EXPORT_SYMBOL(nvm_unregister);
static int __nvm_configure_create(struct nvm_ioctl_create *create)
{
struct nvm_dev *dev;
- struct nvm_ioctl_create_simple *s;
down_write(&nvm_lock);
dev = nvm_find_nvm_dev(create->dev);
@@ -960,23 +1031,6 @@ static int __nvm_configure_create(struct nvm_ioctl_create *create)
return -EINVAL;
}
- if (create->conf.type != NVM_CONFIG_TYPE_SIMPLE) {
- pr_err("nvm: config type not valid\n");
- return -EINVAL;
- }
- s = &create->conf.s;
-
- if (s->lun_begin == -1 && s->lun_end == -1) {
- s->lun_begin = 0;
- s->lun_end = dev->geo.all_luns - 1;
- }
-
- if (s->lun_begin > s->lun_end || s->lun_end >= dev->geo.all_luns) {
- pr_err("nvm: lun out of bound (%u:%u > %u)\n",
- s->lun_begin, s->lun_end, dev->geo.all_luns - 1);
- return -EINVAL;
- }
-
return nvm_create_tgt(dev, create);
}
@@ -1076,6 +1130,12 @@ static long nvm_ioctl_dev_create(struct file *file, void __user *arg)
if (copy_from_user(&create, arg, sizeof(struct nvm_ioctl_create)))
return -EFAULT;
+ if (create.conf.type == NVM_CONFIG_TYPE_EXTENDED &&
+ create.conf.e.rsv != 0) {
+ pr_err("nvm: reserved config field in use\n");
+ return -EINVAL;
+ }
+
create.dev[DISK_NAME_LEN - 1] = '\0';
create.tgttype[NVM_TTYPE_NAME_MAX - 1] = '\0';
create.tgtname[DISK_NAME_LEN - 1] = '\0';
diff --git a/drivers/lightnvm/pblk-init.c b/drivers/lightnvm/pblk-init.c
index c8a718249e26..533f6908e238 100644
--- a/drivers/lightnvm/pblk-init.c
+++ b/drivers/lightnvm/pblk-init.c
@@ -585,7 +585,10 @@ static void pblk_set_provision(struct pblk *pblk, long nr_free_blks)
sector_t provisioned;
int sec_meta, blk_meta;
- pblk->op = 20;
+ if (geo->op == NVM_TARGET_DEFAULT_OP)
+ pblk->op = PBLK_DEFAULT_OP;
+ else
+ pblk->op = geo->op;
provisioned = nr_free_blks;
provisioned *= (100 - pblk->op);
diff --git a/drivers/lightnvm/pblk.h b/drivers/lightnvm/pblk.h
index 1e719d4181ce..19e622c65e92 100644
--- a/drivers/lightnvm/pblk.h
+++ b/drivers/lightnvm/pblk.h
@@ -54,6 +54,8 @@
/* Static pool sizes */
#define PBLK_GEN_WS_POOL_SIZE (2)
+#define PBLK_DEFAULT_OP (11)
+
enum {
PBLK_READ = READ,
PBLK_WRITE = WRITE,/* Write from write buffer */

Privacy Policy