*
*/
-#include <linux/blkdev.h>
-#include <linux/blk-mq.h>
#include <linux/list.h>
#include <linux/types.h>
#include <linux/sem.h>
#include <linux/miscdevice.h>
#include <linux/lightnvm.h>
#include <linux/sched/sysctl.h>
-#include <uapi/linux/lightnvm.h>
static LIST_HEAD(nvm_tgt_types);
+static DECLARE_RWSEM(nvm_tgtt_lock);
static LIST_HEAD(nvm_mgrs);
static LIST_HEAD(nvm_devices);
-static LIST_HEAD(nvm_targets);
static DECLARE_RWSEM(nvm_lock);
-static struct nvm_target *nvm_find_target(const char *name)
+struct nvm_tgt_type *nvm_find_target_type(const char *name, int lock)
{
- struct nvm_target *tgt;
+ struct nvm_tgt_type *tmp, *tt = NULL;
- list_for_each_entry(tgt, &nvm_targets, list)
- if (!strcmp(name, tgt->disk->disk_name))
- return tgt;
+ if (lock)
+ down_write(&nvm_tgtt_lock);
- return NULL;
-}
-
-static struct nvm_tgt_type *nvm_find_target_type(const char *name)
-{
- struct nvm_tgt_type *tt;
-
- list_for_each_entry(tt, &nvm_tgt_types, list)
- if (!strcmp(name, tt->name))
- return tt;
+ list_for_each_entry(tmp, &nvm_tgt_types, list)
+ if (!strcmp(name, tmp->name)) {
+ tt = tmp;
+ break;
+ }
- return NULL;
+ if (lock)
+ up_write(&nvm_tgtt_lock);
+ return tt;
}
+EXPORT_SYMBOL(nvm_find_target_type);
int nvm_register_tgt_type(struct nvm_tgt_type *tt)
{
int ret = 0;
- down_write(&nvm_lock);
- if (nvm_find_target_type(tt->name))
+ down_write(&nvm_tgtt_lock);
+ if (nvm_find_target_type(tt->name, 0))
ret = -EEXIST;
else
list_add(&tt->list, &nvm_tgt_types);
- up_write(&nvm_lock);
+ up_write(&nvm_tgtt_lock);
return ret;
}
return NULL;
}
-struct nvmm_type *nvm_init_mgr(struct nvm_dev *dev)
+static struct nvmm_type *nvm_init_mgr(struct nvm_dev *dev)
{
struct nvmm_type *mt;
int ret;
return NULL;
}
-struct nvm_block *nvm_get_blk_unlocked(struct nvm_dev *dev, struct nvm_lun *lun,
- unsigned long flags)
-{
- return dev->mt->get_blk_unlocked(dev, lun, flags);
-}
-EXPORT_SYMBOL(nvm_get_blk_unlocked);
-
-/* Assumes that all valid pages have already been moved on release to bm */
-void nvm_put_blk_unlocked(struct nvm_dev *dev, struct nvm_block *blk)
-{
- return dev->mt->put_blk_unlocked(dev, blk);
-}
-EXPORT_SYMBOL(nvm_put_blk_unlocked);
-
struct nvm_block *nvm_get_blk(struct nvm_dev *dev, struct nvm_lun *lun,
unsigned long flags)
{
}
EXPORT_SYMBOL(nvm_put_blk);
+void nvm_mark_blk(struct nvm_dev *dev, struct ppa_addr ppa, int type)
+{
+ return dev->mt->mark_blk(dev, ppa, type);
+}
+EXPORT_SYMBOL(nvm_mark_blk);
+
int nvm_submit_io(struct nvm_dev *dev, struct nvm_rq *rqd)
{
return dev->mt->submit_io(dev, rqd);
EXPORT_SYMBOL(nvm_generic_to_addr_mode);
int nvm_set_rqd_ppalist(struct nvm_dev *dev, struct nvm_rq *rqd,
- struct ppa_addr *ppas, int nr_ppas, int vblk)
+ const struct ppa_addr *ppas, int nr_ppas, int vblk)
{
int i, plane_cnt, pl_idx;
+ struct ppa_addr ppa;
if ((!vblk || dev->plane_mode == NVM_PLANE_SINGLE) && nr_ppas == 1) {
rqd->nr_ppas = nr_ppas;
for (i = 0; i < nr_ppas; i++) {
for (pl_idx = 0; pl_idx < plane_cnt; pl_idx++) {
- ppas[i].g.pl = pl_idx;
- rqd->ppa_list[(pl_idx * nr_ppas) + i] = ppas[i];
+ ppa = ppas[i];
+ ppa.g.pl = pl_idx;
+ rqd->ppa_list[(pl_idx * nr_ppas) + i] = ppa;
}
}
}
complete(waiting);
}
-int __nvm_submit_ppa(struct nvm_dev *dev, struct nvm_rq *rqd, int opcode,
+static int __nvm_submit_ppa(struct nvm_dev *dev, struct nvm_rq *rqd, int opcode,
int flags, void *buf, int len)
{
DECLARE_COMPLETION_ONSTACK(wait);
/* Prevent hang_check timer from firing at us during very long I/O */
hang_check = sysctl_hung_task_timeout_secs;
if (hang_check)
- while (!wait_for_completion_io_timeout(&wait, hang_check * (HZ/2)));
+ while (!wait_for_completion_io_timeout(&wait,
+ hang_check * (HZ/2)))
+ ;
else
wait_for_completion_io(&wait);
/* The lower page table encoding consists of a list of bytes, where each
* has a lower and an upper half. The first half byte maintains the
* increment value and every value after is an offset added to the
- * previous incrementation value */
+ * previous incrementation value
+ */
dev->lptbl[0] = mlc->pairs[0] & 0xF;
for (i = 1; i < dev->lps_per_blk; i++) {
p = mlc->pairs[i >> 1];
return ret;
}
-static void nvm_remove_target(struct nvm_target *t)
-{
- struct nvm_tgt_type *tt = t->type;
- struct gendisk *tdisk = t->disk;
- struct request_queue *q = tdisk->queue;
-
- lockdep_assert_held(&nvm_lock);
-
- del_gendisk(tdisk);
- blk_cleanup_queue(q);
-
- if (tt->exit)
- tt->exit(tdisk->private_data);
-
- put_disk(tdisk);
-
- list_del(&t->list);
- kfree(t);
-}
-
static void nvm_free_mgr(struct nvm_dev *dev)
{
- struct nvm_target *tgt, *tmp;
-
if (!dev->mt)
return;
- down_write(&nvm_lock);
- list_for_each_entry_safe(tgt, tmp, &nvm_targets, list) {
- if (tgt->dev != dev)
- continue;
-
- nvm_remove_target(tgt);
- }
- up_write(&nvm_lock);
-
dev->mt->unregister_mgr(dev);
dev->mt = NULL;
}
}
EXPORT_SYMBOL(nvm_unregister);
-static const struct block_device_operations nvm_fops = {
- .owner = THIS_MODULE,
-};
-
-static int nvm_create_target(struct nvm_dev *dev,
- struct nvm_ioctl_create *create)
-{
- struct nvm_ioctl_create_simple *s = &create->conf.s;
- struct request_queue *tqueue;
- struct gendisk *tdisk;
- struct nvm_tgt_type *tt;
- struct nvm_target *t;
- void *targetdata;
-
- if (!dev->mt) {
- pr_info("nvm: device has no media manager registered.\n");
- return -ENODEV;
- }
-
- down_write(&nvm_lock);
- tt = nvm_find_target_type(create->tgttype);
- if (!tt) {
- pr_err("nvm: target type %s not found\n", create->tgttype);
- up_write(&nvm_lock);
- return -EINVAL;
- }
-
- t = nvm_find_target(create->tgtname);
- if (t) {
- pr_err("nvm: target name already exists.\n");
- up_write(&nvm_lock);
- return -EINVAL;
- }
- up_write(&nvm_lock);
-
- t = kmalloc(sizeof(struct nvm_target), GFP_KERNEL);
- if (!t)
- return -ENOMEM;
-
- tqueue = blk_alloc_queue_node(GFP_KERNEL, dev->q->node);
- if (!tqueue)
- goto err_t;
- blk_queue_make_request(tqueue, tt->make_rq);
-
- tdisk = alloc_disk(0);
- if (!tdisk)
- goto err_queue;
-
- sprintf(tdisk->disk_name, "%s", create->tgtname);
- tdisk->flags = GENHD_FL_EXT_DEVT;
- tdisk->major = 0;
- tdisk->first_minor = 0;
- tdisk->fops = &nvm_fops;
- tdisk->queue = tqueue;
-
- targetdata = tt->init(dev, tdisk, s->lun_begin, s->lun_end);
- if (IS_ERR(targetdata))
- goto err_init;
-
- tdisk->private_data = targetdata;
- tqueue->queuedata = targetdata;
-
- blk_queue_max_hw_sectors(tqueue, 8 * dev->ops->max_phys_sect);
-
- set_capacity(tdisk, tt->capacity(targetdata));
- add_disk(tdisk);
-
- t->type = tt;
- t->disk = tdisk;
- t->dev = dev;
-
- down_write(&nvm_lock);
- list_add_tail(&t->list, &nvm_targets);
- up_write(&nvm_lock);
-
- return 0;
-err_init:
- put_disk(tdisk);
-err_queue:
- blk_cleanup_queue(tqueue);
-err_t:
- kfree(t);
- return -ENOMEM;
-}
-
static int __nvm_configure_create(struct nvm_ioctl_create *create)
{
struct nvm_dev *dev;
down_write(&nvm_lock);
dev = nvm_find_nvm_dev(create->dev);
up_write(&nvm_lock);
+
if (!dev) {
pr_err("nvm: device not found\n");
return -EINVAL;
}
+ if (!dev->mt) {
+ pr_info("nvm: device has no media manager registered.\n");
+ return -ENODEV;
+ }
+
if (create->conf.type != NVM_CONFIG_TYPE_SIMPLE) {
pr_err("nvm: config type not valid\n");
return -EINVAL;
return -EINVAL;
}
- return nvm_create_target(dev, create);
-}
-
-static int __nvm_configure_remove(struct nvm_ioctl_remove *remove)
-{
- struct nvm_target *t;
-
- down_write(&nvm_lock);
- t = nvm_find_target(remove->tgtname);
- if (!t) {
- pr_err("nvm: target \"%s\" doesn't exist.\n", remove->tgtname);
- up_write(&nvm_lock);
- return -EINVAL;
- }
-
- nvm_remove_target(t);
- up_write(&nvm_lock);
-
- return 0;
+ return dev->mt->create_tgt(dev, create);
}
#ifdef CONFIG_NVM_DEBUG
static int nvm_configure_remove(const char *val)
{
struct nvm_ioctl_remove remove;
+ struct nvm_dev *dev;
char opcode;
- int ret;
+ int ret = 0;
ret = sscanf(val, "%c %256s", &opcode, remove.tgtname);
if (ret != 2) {
remove.flags = 0;
- return __nvm_configure_remove(&remove);
+ list_for_each_entry(dev, &nvm_devices, devices) {
+ ret = dev->mt->remove_tgt(dev, &remove);
+ if (!ret)
+ break;
+ }
+
+ return ret;
}
static int nvm_configure_create(const char *val)
static long nvm_ioctl_dev_remove(struct file *file, void __user *arg)
{
struct nvm_ioctl_remove remove;
+ struct nvm_dev *dev;
+ int ret = 0;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
return -EINVAL;
}
- return __nvm_configure_remove(&remove);
+ list_for_each_entry(dev, &nvm_devices, devices) {
+ ret = dev->mt->remove_tgt(dev, &remove);
+ if (!ret)
+ break;
+ }
+
+ return ret;
}
static void nvm_setup_nvm_sb_info(struct nvm_sb_info *info)
projects / cascardo / linux.git / blobdiff