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path: root/drivers/lightnvm/gennvm.c
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Diffstat (limited to 'drivers/lightnvm/gennvm.c')
-rw-r--r--drivers/lightnvm/gennvm.c91
1 files changed, 86 insertions, 5 deletions
diff --git a/drivers/lightnvm/gennvm.c b/drivers/lightnvm/gennvm.c
index 7fb725b16..72e124a39 100644
--- a/drivers/lightnvm/gennvm.c
+++ b/drivers/lightnvm/gennvm.c
@@ -20,6 +20,68 @@
#include "gennvm.h"
+static int gennvm_get_area(struct nvm_dev *dev, sector_t *lba, sector_t len)
+{
+ struct gen_nvm *gn = dev->mp;
+ struct gennvm_area *area, *prev, *next;
+ sector_t begin = 0;
+ sector_t max_sectors = (dev->sec_size * dev->total_secs) >> 9;
+
+ if (len > max_sectors)
+ return -EINVAL;
+
+ area = kmalloc(sizeof(struct gennvm_area), GFP_KERNEL);
+ if (!area)
+ return -ENOMEM;
+
+ prev = NULL;
+
+ spin_lock(&dev->lock);
+ list_for_each_entry(next, &gn->area_list, list) {
+ if (begin + len > next->begin) {
+ begin = next->end;
+ prev = next;
+ continue;
+ }
+ break;
+ }
+
+ if ((begin + len) > max_sectors) {
+ spin_unlock(&dev->lock);
+ kfree(area);
+ return -EINVAL;
+ }
+
+ area->begin = *lba = begin;
+ area->end = begin + len;
+
+ if (prev) /* insert into sorted order */
+ list_add(&area->list, &prev->list);
+ else
+ list_add(&area->list, &gn->area_list);
+ spin_unlock(&dev->lock);
+
+ return 0;
+}
+
+static void gennvm_put_area(struct nvm_dev *dev, sector_t begin)
+{
+ struct gen_nvm *gn = dev->mp;
+ struct gennvm_area *area;
+
+ spin_lock(&dev->lock);
+ list_for_each_entry(area, &gn->area_list, list) {
+ if (area->begin != begin)
+ continue;
+
+ list_del(&area->list);
+ spin_unlock(&dev->lock);
+ kfree(area);
+ return;
+ }
+ spin_unlock(&dev->lock);
+}
+
static void gennvm_blocks_free(struct nvm_dev *dev)
{
struct gen_nvm *gn = dev->mp;
@@ -100,14 +162,13 @@ static int gennvm_block_map(u64 slba, u32 nlb, __le64 *entries, void *private)
{
struct nvm_dev *dev = private;
struct gen_nvm *gn = dev->mp;
- sector_t max_pages = dev->total_pages * (dev->sec_size >> 9);
u64 elba = slba + nlb;
struct gen_lun *lun;
struct nvm_block *blk;
u64 i;
int lun_id;
- if (unlikely(elba > dev->total_pages)) {
+ if (unlikely(elba > dev->total_secs)) {
pr_err("gennvm: L2P data from device is out of bounds!\n");
return -EINVAL;
}
@@ -115,7 +176,7 @@ static int gennvm_block_map(u64 slba, u32 nlb, __le64 *entries, void *private)
for (i = 0; i < nlb; i++) {
u64 pba = le64_to_cpu(entries[i]);
- if (unlikely(pba >= max_pages && pba != U64_MAX)) {
+ if (unlikely(pba >= dev->total_secs && pba != U64_MAX)) {
pr_err("gennvm: L2P data entry is out of bounds!\n");
return -EINVAL;
}
@@ -196,8 +257,8 @@ static int gennvm_blocks_init(struct nvm_dev *dev, struct gen_nvm *gn)
}
}
- if (dev->ops->get_l2p_tbl) {
- ret = dev->ops->get_l2p_tbl(dev, 0, dev->total_pages,
+ if ((dev->identity.dom & NVM_RSP_L2P) && dev->ops->get_l2p_tbl) {
+ ret = dev->ops->get_l2p_tbl(dev, 0, dev->total_secs,
gennvm_block_map, dev);
if (ret) {
pr_err("gennvm: could not read L2P table.\n");
@@ -230,6 +291,7 @@ static int gennvm_register(struct nvm_dev *dev)
gn->dev = dev;
gn->nr_luns = dev->nr_luns;
+ INIT_LIST_HEAD(&gn->area_list);
dev->mp = gn;
ret = gennvm_luns_init(dev, gn);
@@ -420,10 +482,23 @@ static int gennvm_erase_blk(struct nvm_dev *dev, struct nvm_block *blk,
return nvm_erase_ppa(dev, &addr, 1);
}
+static int gennvm_reserve_lun(struct nvm_dev *dev, int lunid)
+{
+ return test_and_set_bit(lunid, dev->lun_map);
+}
+
+static void gennvm_release_lun(struct nvm_dev *dev, int lunid)
+{
+ WARN_ON(!test_and_clear_bit(lunid, dev->lun_map));
+}
+
static struct nvm_lun *gennvm_get_lun(struct nvm_dev *dev, int lunid)
{
struct gen_nvm *gn = dev->mp;
+ if (unlikely(lunid >= dev->nr_luns))
+ return NULL;
+
return &gn->luns[lunid].vlun;
}
@@ -465,7 +540,13 @@ static struct nvmm_type gennvm = {
.erase_blk = gennvm_erase_blk,
.get_lun = gennvm_get_lun,
+ .reserve_lun = gennvm_reserve_lun,
+ .release_lun = gennvm_release_lun,
.lun_info_print = gennvm_lun_info_print,
+
+ .get_area = gennvm_get_area,
+ .put_area = gennvm_put_area,
+
};
static int __init gennvm_module_init(void)