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-rw-r--r--drivers/lightnvm/Kconfig3
-rw-r--r--drivers/lightnvm/core.c176
-rw-r--r--drivers/lightnvm/pblk-cache.c24
-rw-r--r--drivers/lightnvm/pblk-core.c512
-rw-r--r--drivers/lightnvm/pblk-gc.c289
-rw-r--r--drivers/lightnvm/pblk-init.c197
-rw-r--r--drivers/lightnvm/pblk-map.c28
-rw-r--r--drivers/lightnvm/pblk-rb.c30
-rw-r--r--drivers/lightnvm/pblk-read.c274
-rw-r--r--drivers/lightnvm/pblk-recovery.c129
-rw-r--r--drivers/lightnvm/pblk-rl.c43
-rw-r--r--drivers/lightnvm/pblk-sysfs.c2
-rw-r--r--drivers/lightnvm/pblk-write.c229
-rw-r--r--drivers/lightnvm/pblk.h132
14 files changed, 1079 insertions, 989 deletions
diff --git a/drivers/lightnvm/Kconfig b/drivers/lightnvm/Kconfig
index ead61a93cb4e..2a953efec4e1 100644
--- a/drivers/lightnvm/Kconfig
+++ b/drivers/lightnvm/Kconfig
@@ -4,7 +4,8 @@
menuconfig NVM
bool "Open-Channel SSD target support"
- depends on BLOCK && HAS_DMA
+ depends on BLOCK && HAS_DMA && PCI
+ select BLK_DEV_NVME
help
Say Y here to get to enable Open-channel SSDs.
diff --git a/drivers/lightnvm/core.c b/drivers/lightnvm/core.c
index ddae430b6eae..83249b43dd06 100644
--- a/drivers/lightnvm/core.c
+++ b/drivers/lightnvm/core.c
@@ -22,6 +22,7 @@
#include <linux/types.h>
#include <linux/sem.h>
#include <linux/bitmap.h>
+#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/miscdevice.h>
#include <linux/lightnvm.h>
@@ -138,7 +139,6 @@ static struct nvm_tgt_dev *nvm_create_tgt_dev(struct nvm_dev *dev,
int prev_nr_luns;
int i, j;
- nr_chnls = nr_luns / dev->geo.luns_per_chnl;
nr_chnls = (nr_chnls_mod == 0) ? nr_chnls : nr_chnls + 1;
dev_map = kmalloc(sizeof(struct nvm_dev_map), GFP_KERNEL);
@@ -226,6 +226,24 @@ static const struct block_device_operations nvm_fops = {
.owner = THIS_MODULE,
};
+static struct nvm_tgt_type *nvm_find_target_type(const char *name, int lock)
+{
+ struct nvm_tgt_type *tmp, *tt = NULL;
+
+ if (lock)
+ down_write(&nvm_tgtt_lock);
+
+ list_for_each_entry(tmp, &nvm_tgt_types, list)
+ if (!strcmp(name, tmp->name)) {
+ tt = tmp;
+ break;
+ }
+
+ if (lock)
+ up_write(&nvm_tgtt_lock);
+ return tt;
+}
+
static int nvm_create_tgt(struct nvm_dev *dev, struct nvm_ioctl_create *create)
{
struct nvm_ioctl_create_simple *s = &create->conf.s;
@@ -316,6 +334,8 @@ static int nvm_create_tgt(struct nvm_dev *dev, struct nvm_ioctl_create *create)
list_add_tail(&t->list, &dev->targets);
mutex_unlock(&dev->mlock);
+ __module_get(tt->owner);
+
return 0;
err_sysfs:
if (tt->exit)
@@ -351,6 +371,7 @@ static void __nvm_remove_target(struct nvm_target *t)
nvm_remove_tgt_dev(t->dev, 1);
put_disk(tdisk);
+ module_put(t->type->owner);
list_del(&t->list);
kfree(t);
@@ -532,25 +553,6 @@ void nvm_part_to_tgt(struct nvm_dev *dev, sector_t *entries,
}
EXPORT_SYMBOL(nvm_part_to_tgt);
-struct nvm_tgt_type *nvm_find_target_type(const char *name, int lock)
-{
- struct nvm_tgt_type *tmp, *tt = NULL;
-
- if (lock)
- down_write(&nvm_tgtt_lock);
-
- list_for_each_entry(tmp, &nvm_tgt_types, list)
- if (!strcmp(name, tmp->name)) {
- tt = tmp;
- break;
- }
-
- 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;
@@ -571,9 +573,9 @@ void nvm_unregister_tgt_type(struct nvm_tgt_type *tt)
if (!tt)
return;
- down_write(&nvm_lock);
+ down_write(&nvm_tgtt_lock);
list_del(&tt->list);
- up_write(&nvm_lock);
+ up_write(&nvm_tgtt_lock);
}
EXPORT_SYMBOL(nvm_unregister_tgt_type);
@@ -602,6 +604,52 @@ static struct nvm_dev *nvm_find_nvm_dev(const char *name)
return NULL;
}
+static int nvm_set_rqd_ppalist(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd,
+ const struct ppa_addr *ppas, int nr_ppas)
+{
+ struct nvm_dev *dev = tgt_dev->parent;
+ struct nvm_geo *geo = &tgt_dev->geo;
+ int i, plane_cnt, pl_idx;
+ struct ppa_addr ppa;
+
+ if (geo->plane_mode == NVM_PLANE_SINGLE && nr_ppas == 1) {
+ rqd->nr_ppas = nr_ppas;
+ rqd->ppa_addr = ppas[0];
+
+ return 0;
+ }
+
+ rqd->nr_ppas = nr_ppas;
+ 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;
+ }
+
+ plane_cnt = geo->plane_mode;
+ rqd->nr_ppas *= plane_cnt;
+
+ for (i = 0; i < nr_ppas; i++) {
+ for (pl_idx = 0; pl_idx < plane_cnt; pl_idx++) {
+ ppa = ppas[i];
+ ppa.g.pl = pl_idx;
+ rqd->ppa_list[(pl_idx * nr_ppas) + i] = ppa;
+ }
+ }
+
+ return 0;
+}
+
+static void nvm_free_rqd_ppalist(struct nvm_tgt_dev *tgt_dev,
+ struct nvm_rq *rqd)
+{
+ if (!rqd->ppa_list)
+ return;
+
+ nvm_dev_dma_free(tgt_dev->parent, rqd->ppa_list, rqd->dma_ppa_list);
+}
+
+
int nvm_set_tgt_bb_tbl(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *ppas,
int nr_ppas, int type)
{
@@ -616,7 +664,7 @@ int nvm_set_tgt_bb_tbl(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *ppas,
memset(&rqd, 0, sizeof(struct nvm_rq));
- nvm_set_rqd_ppalist(tgt_dev, &rqd, ppas, nr_ppas, 1);
+ nvm_set_rqd_ppalist(tgt_dev, &rqd, ppas, nr_ppas);
nvm_rq_tgt_to_dev(tgt_dev, &rqd);
ret = dev->ops->set_bb_tbl(dev, &rqd.ppa_addr, rqd.nr_ppas, type);
@@ -658,12 +706,25 @@ int nvm_submit_io(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd)
}
EXPORT_SYMBOL(nvm_submit_io);
-static void nvm_end_io_sync(struct nvm_rq *rqd)
+int nvm_submit_io_sync(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd)
{
- struct completion *waiting = rqd->private;
+ struct nvm_dev *dev = tgt_dev->parent;
+ int ret;
- complete(waiting);
+ if (!dev->ops->submit_io_sync)
+ return -ENODEV;
+
+ nvm_rq_tgt_to_dev(tgt_dev, rqd);
+
+ rqd->dev = tgt_dev;
+
+ /* In case of error, fail with right address format */
+ ret = dev->ops->submit_io_sync(dev, rqd);
+ nvm_rq_dev_to_tgt(tgt_dev, rqd);
+
+ return ret;
}
+EXPORT_SYMBOL(nvm_submit_io_sync);
int nvm_erase_sync(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *ppas,
int nr_ppas)
@@ -671,25 +732,21 @@ int nvm_erase_sync(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *ppas,
struct nvm_geo *geo = &tgt_dev->geo;
struct nvm_rq rqd;
int ret;
- DECLARE_COMPLETION_ONSTACK(wait);
memset(&rqd, 0, sizeof(struct nvm_rq));
rqd.opcode = NVM_OP_ERASE;
- rqd.end_io = nvm_end_io_sync;
- rqd.private = &wait;
rqd.flags = geo->plane_mode >> 1;
- ret = nvm_set_rqd_ppalist(tgt_dev, &rqd, ppas, nr_ppas, 1);
+ ret = nvm_set_rqd_ppalist(tgt_dev, &rqd, ppas, nr_ppas);
if (ret)
return ret;
- ret = nvm_submit_io(tgt_dev, &rqd);
+ ret = nvm_submit_io_sync(tgt_dev, &rqd);
if (ret) {
pr_err("rrpr: erase I/O submission failed: %d\n", ret);
goto free_ppa_list;
}
- wait_for_completion_io(&wait);
free_ppa_list:
nvm_free_rqd_ppalist(tgt_dev, &rqd);
@@ -775,57 +832,6 @@ void nvm_put_area(struct nvm_tgt_dev *tgt_dev, sector_t begin)
}
EXPORT_SYMBOL(nvm_put_area);
-int nvm_set_rqd_ppalist(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd,
- const struct ppa_addr *ppas, int nr_ppas, int vblk)
-{
- struct nvm_dev *dev = tgt_dev->parent;
- struct nvm_geo *geo = &tgt_dev->geo;
- int i, plane_cnt, pl_idx;
- struct ppa_addr ppa;
-
- if ((!vblk || geo->plane_mode == NVM_PLANE_SINGLE) && nr_ppas == 1) {
- rqd->nr_ppas = nr_ppas;
- rqd->ppa_addr = ppas[0];
-
- return 0;
- }
-
- rqd->nr_ppas = nr_ppas;
- 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;
- }
-
- if (!vblk) {
- for (i = 0; i < nr_ppas; i++)
- rqd->ppa_list[i] = ppas[i];
- } else {
- plane_cnt = geo->plane_mode;
- rqd->nr_ppas *= plane_cnt;
-
- for (i = 0; i < nr_ppas; i++) {
- for (pl_idx = 0; pl_idx < plane_cnt; pl_idx++) {
- ppa = ppas[i];
- ppa.g.pl = pl_idx;
- rqd->ppa_list[(pl_idx * nr_ppas) + i] = ppa;
- }
- }
- }
-
- return 0;
-}
-EXPORT_SYMBOL(nvm_set_rqd_ppalist);
-
-void nvm_free_rqd_ppalist(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd)
-{
- if (!rqd->ppa_list)
- return;
-
- nvm_dev_dma_free(tgt_dev->parent, rqd->ppa_list, rqd->dma_ppa_list);
-}
-EXPORT_SYMBOL(nvm_free_rqd_ppalist);
-
void nvm_end_io(struct nvm_rq *rqd)
{
struct nvm_tgt_dev *tgt_dev = rqd->dev;
@@ -1177,7 +1183,7 @@ static long nvm_ioctl_info(struct file *file, void __user *arg)
info->version[1] = NVM_VERSION_MINOR;
info->version[2] = NVM_VERSION_PATCH;
- down_write(&nvm_lock);
+ down_write(&nvm_tgtt_lock);
list_for_each_entry(tt, &nvm_tgt_types, list) {
struct nvm_ioctl_info_tgt *tgt = &info->tgts[tgt_iter];
@@ -1190,7 +1196,7 @@ static long nvm_ioctl_info(struct file *file, void __user *arg)
}
info->tgtsize = tgt_iter;
- up_write(&nvm_lock);
+ up_write(&nvm_tgtt_lock);
if (copy_to_user(arg, info, sizeof(struct nvm_ioctl_info))) {
kfree(info);
diff --git a/drivers/lightnvm/pblk-cache.c b/drivers/lightnvm/pblk-cache.c
index 024a8fc93069..0d227ef7d1b9 100644
--- a/drivers/lightnvm/pblk-cache.c
+++ b/drivers/lightnvm/pblk-cache.c
@@ -43,8 +43,10 @@ retry:
if (unlikely(!bio_has_data(bio)))
goto out;
- w_ctx.flags = flags;
pblk_ppa_set_empty(&w_ctx.ppa);
+ w_ctx.flags = flags;
+ if (bio->bi_opf & REQ_PREFLUSH)
+ w_ctx.flags |= PBLK_FLUSH_ENTRY;
for (i = 0; i < nr_entries; i++) {
void *data = bio_data(bio);
@@ -73,12 +75,11 @@ out:
* On GC the incoming lbas are not necessarily sequential. Also, some of the
* lbas might not be valid entries, which are marked as empty by the GC thread
*/
-int pblk_write_gc_to_cache(struct pblk *pblk, void *data, u64 *lba_list,
- unsigned int nr_entries, unsigned int nr_rec_entries,
- struct pblk_line *gc_line, unsigned long flags)
+int pblk_write_gc_to_cache(struct pblk *pblk, struct pblk_gc_rq *gc_rq)
{
struct pblk_w_ctx w_ctx;
unsigned int bpos, pos;
+ void *data = gc_rq->data;
int i, valid_entries;
/* Update the write buffer head (mem) with the entries that we can
@@ -86,28 +87,29 @@ int pblk_write_gc_to_cache(struct pblk *pblk, void *data, u64 *lba_list,
* rollback from here on.
*/
retry:
- if (!pblk_rb_may_write_gc(&pblk->rwb, nr_rec_entries, &bpos)) {
+ if (!pblk_rb_may_write_gc(&pblk->rwb, gc_rq->secs_to_gc, &bpos)) {
io_schedule();
goto retry;
}
- w_ctx.flags = flags;
+ w_ctx.flags = PBLK_IOTYPE_GC;
pblk_ppa_set_empty(&w_ctx.ppa);
- for (i = 0, valid_entries = 0; i < nr_entries; i++) {
- if (lba_list[i] == ADDR_EMPTY)
+ for (i = 0, valid_entries = 0; i < gc_rq->nr_secs; i++) {
+ if (gc_rq->lba_list[i] == ADDR_EMPTY)
continue;
- w_ctx.lba = lba_list[i];
+ w_ctx.lba = gc_rq->lba_list[i];
pos = pblk_rb_wrap_pos(&pblk->rwb, bpos + valid_entries);
- pblk_rb_write_entry_gc(&pblk->rwb, data, w_ctx, gc_line, pos);
+ pblk_rb_write_entry_gc(&pblk->rwb, data, w_ctx, gc_rq->line,
+ gc_rq->paddr_list[i], pos);
data += PBLK_EXPOSED_PAGE_SIZE;
valid_entries++;
}
- WARN_ONCE(nr_rec_entries != valid_entries,
+ WARN_ONCE(gc_rq->secs_to_gc != valid_entries,
"pblk: inconsistent GC write\n");
#ifdef CONFIG_NVM_DEBUG
diff --git a/drivers/lightnvm/pblk-core.c b/drivers/lightnvm/pblk-core.c
index 81501644fb15..ce90213a42fa 100644
--- a/drivers/lightnvm/pblk-core.c
+++ b/drivers/lightnvm/pblk-core.c
@@ -18,6 +18,31 @@
#include "pblk.h"
+static void pblk_line_mark_bb(struct work_struct *work)
+{
+ struct pblk_line_ws *line_ws = container_of(work, struct pblk_line_ws,
+ ws);
+ struct pblk *pblk = line_ws->pblk;
+ struct nvm_tgt_dev *dev = pblk->dev;
+ struct ppa_addr *ppa = line_ws->priv;
+ int ret;
+
+ ret = nvm_set_tgt_bb_tbl(dev, ppa, 1, NVM_BLK_T_GRWN_BAD);
+ if (ret) {
+ struct pblk_line *line;
+ int pos;
+
+ line = &pblk->lines[pblk_dev_ppa_to_line(*ppa)];
+ pos = pblk_dev_ppa_to_pos(&dev->geo, *ppa);
+
+ pr_err("pblk: failed to mark bb, line:%d, pos:%d\n",
+ line->id, pos);
+ }
+
+ kfree(ppa);
+ mempool_free(line_ws, pblk->gen_ws_pool);
+}
+
static void pblk_mark_bb(struct pblk *pblk, struct pblk_line *line,
struct ppa_addr *ppa)
{
@@ -33,7 +58,8 @@ static void pblk_mark_bb(struct pblk *pblk, struct pblk_line *line,
pr_err("pblk: attempted to erase bb: line:%d, pos:%d\n",
line->id, pos);
- pblk_line_run_ws(pblk, NULL, ppa, pblk_line_mark_bb, pblk->bb_wq);
+ pblk_gen_run_ws(pblk, NULL, ppa, pblk_line_mark_bb,
+ GFP_ATOMIC, pblk->bb_wq);
}
static void __pblk_end_io_erase(struct pblk *pblk, struct nvm_rq *rqd)
@@ -63,7 +89,7 @@ static void pblk_end_io_erase(struct nvm_rq *rqd)
struct pblk *pblk = rqd->private;
__pblk_end_io_erase(pblk, rqd);
- mempool_free(rqd, pblk->g_rq_pool);
+ mempool_free(rqd, pblk->e_rq_pool);
}
void __pblk_map_invalidate(struct pblk *pblk, struct pblk_line *line,
@@ -77,11 +103,7 @@ void __pblk_map_invalidate(struct pblk *pblk, struct pblk_line *line,
* that newer updates are not overwritten.
*/
spin_lock(&line->lock);
- if (line->state == PBLK_LINESTATE_GC ||
- line->state == PBLK_LINESTATE_FREE) {
- spin_unlock(&line->lock);
- return;
- }
+ WARN_ON(line->state == PBLK_LINESTATE_FREE);
if (test_and_set_bit(paddr, line->invalid_bitmap)) {
WARN_ONCE(1, "pblk: double invalidate\n");
@@ -98,8 +120,7 @@ void __pblk_map_invalidate(struct pblk *pblk, struct pblk_line *line,
spin_lock(&l_mg->gc_lock);
spin_lock(&line->lock);
/* Prevent moving a line that has just been chosen for GC */
- if (line->state == PBLK_LINESTATE_GC ||
- line->state == PBLK_LINESTATE_FREE) {
+ if (line->state == PBLK_LINESTATE_GC) {
spin_unlock(&line->lock);
spin_unlock(&l_mg->gc_lock);
return;
@@ -150,17 +171,25 @@ static void pblk_invalidate_range(struct pblk *pblk, sector_t slba,
spin_unlock(&pblk->trans_lock);
}
-struct nvm_rq *pblk_alloc_rqd(struct pblk *pblk, int rw)
+/* Caller must guarantee that the request is a valid type */
+struct nvm_rq *pblk_alloc_rqd(struct pblk *pblk, int type)
{
mempool_t *pool;
struct nvm_rq *rqd;
int rq_size;
- if (rw == WRITE) {
+ switch (type) {
+ case PBLK_WRITE:
+ case PBLK_WRITE_INT:
pool = pblk->w_rq_pool;
rq_size = pblk_w_rq_size;
- } else {
- pool = pblk->g_rq_pool;
+ break;
+ case PBLK_READ:
+ pool = pblk->r_rq_pool;
+ rq_size = pblk_g_rq_size;
+ break;
+ default:
+ pool = pblk->e_rq_pool;
rq_size = pblk_g_rq_size;
}
@@ -170,15 +199,30 @@ struct nvm_rq *pblk_alloc_rqd(struct pblk *pblk, int rw)
return rqd;
}
-void pblk_free_rqd(struct pblk *pblk, struct nvm_rq *rqd, int rw)
+/* Typically used on completion path. Cannot guarantee request consistency */
+void pblk_free_rqd(struct pblk *pblk, struct nvm_rq *rqd, int type)
{
+ struct nvm_tgt_dev *dev = pblk->dev;
mempool_t *pool;
- if (rw == WRITE)
+ switch (type) {
+ case PBLK_WRITE:
+ kfree(((struct pblk_c_ctx *)nvm_rq_to_pdu(rqd))->lun_bitmap);
+ case PBLK_WRITE_INT:
pool = pblk->w_rq_pool;
- else
- pool = pblk->g_rq_pool;
+ break;
+ case PBLK_READ:
+ pool = pblk->r_rq_pool;
+ break;
+ case PBLK_ERASE:
+ pool = pblk->e_rq_pool;
+ break;
+ default:
+ pr_err("pblk: trying to free unknown rqd type\n");
+ return;
+ }
+ nvm_dev_dma_free(dev->parent, rqd->meta_list, rqd->dma_meta_list);
mempool_free(rqd, pool);
}
@@ -190,10 +234,9 @@ void pblk_bio_free_pages(struct pblk *pblk, struct bio *bio, int off,
WARN_ON(off + nr_pages != bio->bi_vcnt);
- bio_advance(bio, off * PBLK_EXPOSED_PAGE_SIZE);
for (i = off; i < nr_pages + off; i++) {
bv = bio->bi_io_vec[i];
- mempool_free(bv.bv_page, pblk->page_pool);
+ mempool_free(bv.bv_page, pblk->page_bio_pool);
}
}
@@ -205,14 +248,12 @@ int pblk_bio_add_pages(struct pblk *pblk, struct bio *bio, gfp_t flags,
int i, ret;
for (i = 0; i < nr_pages; i++) {
- page = mempool_alloc(pblk->page_pool, flags);
- if (!page)
- goto err;
+ page = mempool_alloc(pblk->page_bio_pool, flags);
ret = bio_add_pc_page(q, bio, page, PBLK_EXPOSED_PAGE_SIZE, 0);
if (ret != PBLK_EXPOSED_PAGE_SIZE) {
pr_err("pblk: could not add page to bio\n");
- mempool_free(page, pblk->page_pool);
+ mempool_free(page, pblk->page_bio_pool);
goto err;
}
}
@@ -245,13 +286,6 @@ void pblk_write_should_kick(struct pblk *pblk)
pblk_write_kick(pblk);
}
-void pblk_end_bio_sync(struct bio *bio)
-{
- struct completion *waiting = bio->bi_private;
-
- complete(waiting);
-}
-
void pblk_end_io_sync(struct nvm_rq *rqd)
{
struct completion *waiting = rqd->private;
@@ -259,7 +293,7 @@ void pblk_end_io_sync(struct nvm_rq *rqd)
complete(waiting);
}
-void pblk_wait_for_meta(struct pblk *pblk)
+static void pblk_wait_for_meta(struct pblk *pblk)
{
do {
if (!atomic_read(&pblk->inflight_io))
@@ -336,17 +370,6 @@ void pblk_discard(struct pblk *pblk, struct bio *bio)
pblk_invalidate_range(pblk, slba, nr_secs);
}
-struct ppa_addr pblk_get_lba_map(struct pblk *pblk, sector_t lba)
-{
- struct ppa_addr ppa;
-
- spin_lock(&pblk->trans_lock);
- ppa = pblk_trans_map_get(pblk, lba);
- spin_unlock(&pblk->trans_lock);
-
- return ppa;
-}
-
void pblk_log_write_err(struct pblk *pblk, struct nvm_rq *rqd)
{
atomic_long_inc(&pblk->write_failed);
@@ -389,39 +412,38 @@ int pblk_submit_io(struct pblk *pblk, struct nvm_rq *rqd)
struct nvm_tgt_dev *dev = pblk->dev;
#ifdef CONFIG_NVM_DEBUG
- struct ppa_addr *ppa_list;
+ int ret;
- ppa_list = (rqd->nr_ppas > 1) ? rqd->ppa_list : &rqd->ppa_addr;
- if (pblk_boundary_ppa_checks(dev, ppa_list, rqd->nr_ppas)) {
- WARN_ON(1);
- return -EINVAL;
- }
+ ret = pblk_check_io(pblk, rqd);
+ if (ret)
+ return ret;
+#endif
- if (rqd->opcode == NVM_OP_PWRITE) {
- struct pblk_line *line;
- struct ppa_addr ppa;
- int i;
+ atomic_inc(&pblk->inflight_io);
- for (i = 0; i < rqd->nr_ppas; i++) {
- ppa = ppa_list[i];
- line = &pblk->lines[pblk_dev_ppa_to_line(ppa)];
+ return nvm_submit_io(dev, rqd);
+}
- spin_lock(&line->lock);
- if (line->state != PBLK_LINESTATE_OPEN) {
- pr_err("pblk: bad ppa: line:%d,state:%d\n",
- line->id, line->state);
- WARN_ON(1);
- spin_unlock(&line->lock);
- return -EINVAL;
- }
- spin_unlock(&line->lock);
- }
- }
+int pblk_submit_io_sync(struct pblk *pblk, struct nvm_rq *rqd)
+{
+ struct nvm_tgt_dev *dev = pblk->dev;
+
+#ifdef CONFIG_NVM_DEBUG
+ int ret;
+
+ ret = pblk_check_io(pblk, rqd);
+ if (ret)
+ return ret;
#endif
atomic_inc(&pblk->inflight_io);
- return nvm_submit_io(dev, rqd);
+ return nvm_submit_io_sync(dev, rqd);
+}
+
+static void pblk_bio_map_addr_endio(struct bio *bio)
+{
+ bio_put(bio);
}
struct bio *pblk_bio_map_addr(struct pblk *pblk, void *data,
@@ -460,6 +482,8 @@ struct bio *pblk_bio_map_addr(struct pblk *pblk, void *data,
kaddr += PAGE_SIZE;
}
+
+ bio->bi_end_io = pblk_bio_map_addr_endio;
out:
return bio;
}
@@ -486,12 +510,14 @@ void pblk_dealloc_page(struct pblk *pblk, struct pblk_line *line, int nr_secs)
u64 addr;
int i;
+ spin_lock(&line->lock);
addr = find_next_zero_bit(line->map_bitmap,
pblk->lm.sec_per_line, line->cur_sec);
line->cur_sec = addr - nr_secs;
for (i = 0; i < nr_secs; i++, line->cur_sec--)
WARN_ON(!test_and_clear_bit(line->cur_sec, line->map_bitmap));
+ spin_unlock(&line->lock);
}
u64 __pblk_alloc_page(struct pblk *pblk, struct pblk_line *line, int nr_secs)
@@ -565,12 +591,11 @@ static int pblk_line_submit_emeta_io(struct pblk *pblk, struct pblk_line *line,
int cmd_op, bio_op;
int i, j;
int ret;
- DECLARE_COMPLETION_ONSTACK(wait);
- if (dir == WRITE) {
+ if (dir == PBLK_WRITE) {
bio_op = REQ_OP_WRITE;
cmd_op = NVM_OP_PWRITE;
- } else if (dir == READ) {
+ } else if (dir == PBLK_READ) {
bio_op = REQ_OP_READ;
cmd_op = NVM_OP_PREAD;
} else
@@ -607,13 +632,11 @@ next_rq:
rqd.dma_ppa_list = dma_ppa_list;
rqd.opcode = cmd_op;
rqd.nr_ppas = rq_ppas;
- rqd.end_io = pblk_end_io_sync;
- rqd.private = &wait;
- if (dir == WRITE) {
+ if (dir == PBLK_WRITE) {
struct pblk_sec_meta *meta_list = rqd.meta_list;
- rqd.flags = pblk_set_progr_mode(pblk, WRITE);
+ rqd.flags = pblk_set_progr_mode(pblk, PBLK_WRITE);
for (i = 0; i < rqd.nr_ppas; ) {
spin_lock(&line->lock);
paddr = __pblk_alloc_page(pblk, line, min);
@@ -662,25 +685,17 @@ next_rq:
}
}
- ret = pblk_submit_io(pblk, &rqd);
+ ret = pblk_submit_io_sync(pblk, &rqd);
if (ret) {
pr_err("pblk: emeta I/O submission failed: %d\n", ret);
bio_put(bio);
goto free_rqd_dma;
}
- if (!wait_for_completion_io_timeout(&wait,
- msecs_to_jiffies(PBLK_COMMAND_TIMEOUT_MS))) {
- pr_err("pblk: emeta I/O timed out\n");
- }
atomic_dec(&pblk->inflight_io);
- reinit_completion(&wait);
-
- if (likely(pblk->l_mg.emeta_alloc_type == PBLK_VMALLOC_META))
- bio_put(bio);
if (rqd.error) {
- if (dir == WRITE)
+ if (dir == PBLK_WRITE)
pblk_log_write_err(pblk, &rqd);
else
pblk_log_read_err(pblk, &rqd);
@@ -721,14 +736,13 @@ static int pblk_line_submit_smeta_io(struct pblk *pblk, struct pblk_line *line,
int i, ret;
int cmd_op, bio_op;
int flags;
- DECLARE_COMPLETION_ONSTACK(wait);
- if (dir == WRITE) {
+ if (dir == PBLK_WRITE) {
bio_op = REQ_OP_WRITE;
cmd_op = NVM_OP_PWRITE;
- flags = pblk_set_progr_mode(pblk, WRITE);
+ flags = pblk_set_progr_mode(pblk, PBLK_WRITE);
lba_list = emeta_to_lbas(pblk, line->emeta->buf);
- } else if (dir == READ) {
+ } else if (dir == PBLK_READ) {
bio_op = REQ_OP_READ;
cmd_op = NVM_OP_PREAD;
flags = pblk_set_read_mode(pblk, PBLK_READ_SEQUENTIAL);
@@ -758,15 +772,13 @@ static int pblk_line_submit_smeta_io(struct pblk *pblk, struct pblk_line *line,
rqd.opcode = cmd_op;
rqd.flags = flags;
rqd.nr_ppas = lm->smeta_sec;
- rqd.end_io = pblk_end_io_sync;
- rqd.private = &wait;
for (i = 0; i < lm->smeta_sec; i++, paddr++) {
struct pblk_sec_meta *meta_list = rqd.meta_list;
rqd.ppa_list[i] = addr_to_gen_ppa(pblk, paddr, line->id);
- if (dir == WRITE) {
+ if (dir == PBLK_WRITE) {
__le64 addr_empty = cpu_to_le64(ADDR_EMPTY);
meta_list[i].lba = lba_list[paddr] = addr_empty;
@@ -778,21 +790,17 @@ static int pblk_line_submit_smeta_io(struct pblk *pblk, struct pblk_line *line,
* the write thread is the only one sending write and erase commands,
* there is no need to take the LUN semaphore.
*/
- ret = pblk_submit_io(pblk, &rqd);
+ ret = pblk_submit_io_sync(pblk, &rqd);
if (ret) {
pr_err("pblk: smeta I/O submission failed: %d\n", ret);
bio_put(bio);
goto free_ppa_list;
}
- if (!wait_for_completion_io_timeout(&wait,
- msecs_to_jiffies(PBLK_COMMAND_TIMEOUT_MS))) {
- pr_err("pblk: smeta I/O timed out\n");
- }
atomic_dec(&pblk->inflight_io);
if (rqd.error) {
- if (dir == WRITE)
+ if (dir == PBLK_WRITE)
pblk_log_write_err(pblk, &rqd);
else
pblk_log_read_err(pblk, &rqd);
@@ -808,14 +816,14 @@ int pblk_line_read_smeta(struct pblk *pblk, struct pblk_line *line)
{
u64 bpaddr = pblk_line_smeta_start(pblk, line);
- return pblk_line_submit_smeta_io(pblk, line, bpaddr, READ);
+ return pblk_line_submit_smeta_io(pblk, line, bpaddr, PBLK_READ);
}
int pblk_line_read_emeta(struct pblk *pblk, struct pblk_line *line,
void *emeta_buf)
{
return pblk_line_submit_emeta_io(pblk, line, emeta_buf,
- line->emeta_ssec, READ);
+ line->emeta_ssec, PBLK_READ);
}
static void pblk_setup_e_rq(struct pblk *pblk, struct nvm_rq *rqd,
@@ -824,7 +832,7 @@ static void pblk_setup_e_rq(struct pblk *pblk, struct nvm_rq *rqd,
rqd->opcode = NVM_OP_ERASE;
rqd->ppa_addr = ppa;
rqd->nr_ppas = 1;
- rqd->flags = pblk_set_progr_mode(pblk, ERASE);
+ rqd->flags = pblk_set_progr_mode(pblk, PBLK_ERASE);
rqd->bio = NULL;
}
@@ -832,19 +840,15 @@ static int pblk_blk_erase_sync(struct pblk *pblk, struct ppa_addr ppa)
{
struct nvm_rq rqd;
int ret = 0;
- DECLARE_COMPLETION_ONSTACK(wait);
memset(&rqd, 0, sizeof(struct nvm_rq));
pblk_setup_e_rq(pblk, &rqd, ppa);
- rqd.end_io = pblk_end_io_sync;
- rqd.private = &wait;
-
/* The write thread schedules erases so that it minimizes disturbances
* with writes. Thus, there is no need to take the LUN semaphore.
*/
- ret = pblk_submit_io(pblk, &rqd);
+ ret = pblk_submit_io_sync(pblk, &rqd);
if (ret) {
struct nvm_tgt_dev *dev = pblk->dev;
struct nvm_geo *geo = &dev->geo;
@@ -857,11 +861,6 @@ static int pblk_blk_erase_sync(struct pblk *pblk, struct ppa_addr ppa)
goto out;
}
- if (!wait_for_completion_io_timeout(&wait,
- msecs_to_jiffies(PBLK_COMMAND_TIMEOUT_MS))) {
- pr_err("pblk: sync erase timed out\n");
- }
-
out:
rqd.private = pblk;
__pblk_end_io_erase(pblk, &rqd);
@@ -976,7 +975,7 @@ static int pblk_line_init_metadata(struct pblk *pblk, struct pblk_line *line,
memcpy(smeta_buf->header.uuid, pblk->instance_uuid, 16);
smeta_buf->header.id = cpu_to_le32(line->id);
smeta_buf->header.type = cpu_to_le16(line->type);
- smeta_buf->header.version = cpu_to_le16(1);
+ smeta_buf->header.version = SMETA_VERSION;
/* Start metadata */
smeta_buf->seq_nr = cpu_to_le64(line->seq_nr);
@@ -1046,7 +1045,7 @@ static int pblk_line_init_bb(struct pblk *pblk, struct pblk_line *line,
line->smeta_ssec = off;
line->cur_sec = off + lm->smeta_sec;
- if (init && pblk_line_submit_smeta_io(pblk, line, off, WRITE)) {
+ if (init && pblk_line_submit_smeta_io(pblk, line, off, PBLK_WRITE)) {
pr_debug("pblk: line smeta I/O failed. Retry\n");
return 1;
}
@@ -1056,7 +1055,6 @@ static int pblk_line_init_bb(struct pblk *pblk, struct pblk_line *line,
/* Mark emeta metadata sectors as bad sectors. We need to consider bad
* blocks to make sure that there are enough sectors to store emeta
*/
- bit = lm->sec_per_line;
off = lm->sec_per_line - lm->emeta_sec[0];
bitmap_set(line->invalid_bitmap, off, lm->emeta_sec[0]);
while (nr_bb) {
@@ -1093,25 +1091,21 @@ static int pblk_line_prepare(struct pblk *pblk, struct pblk_line *line)
struct pblk_line_meta *lm = &pblk->lm;
int blk_in_line = atomic_read(&line->blk_in_line);
- line->map_bitmap = mempool_alloc(pblk->line_meta_pool, GFP_ATOMIC);
+ line->map_bitmap = kzalloc(lm->sec_bitmap_len, GFP_ATOMIC);
if (!line->map_bitmap)
return -ENOMEM;
- memset(line->map_bitmap, 0, lm->sec_bitmap_len);
- /* invalid_bitmap is special since it is used when line is closed. No
- * need to zeroized; it will be initialized using bb info form
- * map_bitmap
- */
- line->invalid_bitmap = mempool_alloc(pblk->line_meta_pool, GFP_ATOMIC);
+ /* will be initialized using bb info from map_bitmap */
+ line->invalid_bitmap = kmalloc(lm->sec_bitmap_len, GFP_ATOMIC);
if (!line->invalid_bitmap) {
- mempool_free(line->map_bitmap, pblk->line_meta_pool);
+ kfree(line->map_bitmap);
return -ENOMEM;
}
spin_lock(&line->lock);
if (line->state != PBLK_LINESTATE_FREE) {
- mempool_free(line->invalid_bitmap, pblk->line_meta_pool);
- mempool_free(line->map_bitmap, pblk->line_meta_pool);
+ kfree(line->map_bitmap);
+ kfree(line->invalid_bitmap);
spin_unlock(&line->lock);
WARN(1, "pblk: corrupted line %d, state %d\n",
line->id, line->state);
@@ -1163,7 +1157,7 @@ int pblk_line_recov_alloc(struct pblk *pblk, struct pblk_line *line)
void pblk_line_recov_close(struct pblk *pblk, struct pblk_line *line)
{
- mempool_free(line->map_bitmap, pblk->line_meta_pool);
+ kfree(line->map_bitmap);
line->map_bitmap = NULL;
line->smeta = NULL;
line->emeta = NULL;
@@ -1328,6 +1322,41 @@ static void pblk_stop_writes(struct pblk *pblk, struct pblk_line *line)
pblk->state = PBLK_STATE_STOPPING;
}
+static void pblk_line_close_meta_sync(struct pblk *pblk)
+{
+ struct pblk_line_mgmt *l_mg = &pblk->l_mg;
+ struct pblk_line_meta *lm = &pblk->lm;
+ struct pblk_line *line, *tline;
+ LIST_HEAD(list);
+
+ spin_lock(&l_mg->close_lock);
+ if (list_empty(&l_mg->emeta_list)) {
+ spin_unlock(&l_mg->close_lock);
+ return;
+ }
+
+ list_cut_position(&list, &l_mg->emeta_list, l_mg->emeta_list.prev);
+ spin_unlock(&l_mg->close_lock);
+
+ list_for_each_entry_safe(line, tline, &list, list) {
+ struct pblk_emeta *emeta = line->emeta;
+
+ while (emeta->mem < lm->emeta_len[0]) {
+ int ret;
+
+ ret = pblk_submit_meta_io(pblk, line);
+ if (ret) {
+ pr_err("pblk: sync meta line %d failed (%d)\n",
+ line->id, ret);
+ return;
+ }
+ }
+ }
+
+ pblk_wait_for_meta(pblk);
+ flush_workqueue(pblk->close_wq);
+}
+
void pblk_pipeline_stop(struct pblk *pblk)
{
struct pblk_line_mgmt *l_mg = &pblk->l_mg;
@@ -1361,17 +1390,17 @@ void pblk_pipeline_stop(struct pblk *pblk)
spin_unlock(&l_mg->free_lock);
}
-void pblk_line_replace_data(struct pblk *pblk)
+struct pblk_line *pblk_line_replace_data(struct pblk *pblk)
{
struct pblk_line_mgmt *l_mg = &pblk->l_mg;
- struct pblk_line *cur, *new;
+ struct pblk_line *cur, *new = NULL;
unsigned int left_seblks;
int is_next = 0;
cur = l_mg->data_line;
new = l_mg->data_next;
if (!new)
- return;
+ goto out;
l_mg->data_line = new;
spin_lock(&l_mg->free_lock);
@@ -1379,7 +1408,7 @@ void pblk_line_replace_data(struct pblk *pblk)
l_mg->data_line = NULL;
l_mg->data_next = NULL;
spin_unlock(&l_mg->free_lock);
- return;
+ goto out;
}
pblk_line_setup_metadata(new, l_mg, &pblk->lm);
@@ -1391,7 +1420,7 @@ retry_erase:
/* If line is not fully erased, erase it */
if (atomic_read(&new->left_eblks)) {
if (pblk_line_erase(pblk, new))
- return;
+ goto out;
} else {
io_schedule();
}
@@ -1402,7 +1431,7 @@ retry_setup:
if (!pblk_line_init_metadata(pblk, new, cur)) {
new = pblk_line_retry(pblk, new);
if (!new)
- return;
+ goto out;
goto retry_setup;
}
@@ -1410,7 +1439,7 @@ retry_setup:
if (!pblk_line_init_bb(pblk, new, 1)) {
new = pblk_line_retry(pblk, new);
if (!new)
- return;
+ goto out;
goto retry_setup;
}
@@ -1434,14 +1463,15 @@ retry_setup:
if (is_next)
pblk_rl_free_lines_dec(&pblk->rl, l_mg->data_next);
+
+out:
+ return new;
}
void pblk_line_free(struct pblk *pblk, struct pblk_line *line)
{
- if (line->map_bitmap)
- mempool_free(line->map_bitmap, pblk->line_meta_pool);
- if (line->invalid_bitmap)
- mempool_free(line->invalid_bitmap, pblk->line_meta_pool);
+ kfree(line->map_bitmap);
+ kfree(line->invalid_bitmap);
*line->vsc = cpu_to_le32(EMPTY_ENTRY);
@@ -1451,11 +1481,10 @@ void pblk_line_free(struct pblk *pblk, struct pblk_line *line)
line->emeta = NULL;
}
-void pblk_line_put(struct kref *ref)
+static void __pblk_line_put(struct pblk *pblk, struct pblk_line *line)
{
- struct pblk_line *line = container_of(ref, struct pblk_line, ref);
- struct pblk *pblk = line->pblk;
struct pblk_line_mgmt *l_mg = &pblk->l_mg;
+ struct pblk_gc *gc = &pblk->gc;
spin_lock(&line->lock);
WARN_ON(line->state != PBLK_LINESTATE_GC);
@@ -1464,6 +1493,8 @@ void pblk_line_put(struct kref *ref)
pblk_line_free(pblk, line);
spin_unlock(&line->lock);
+ atomic_dec(&gc->pipeline_gc);
+
spin_lock(&l_mg->free_lock);
list_add_tail(&line->list, &l_mg->free_list);
l_mg->nr_free_lines++;
@@ -1472,13 +1503,49 @@ void pblk_line_put(struct kref *ref)
pblk_rl_free_lines_inc(&pblk->rl, line);
}
+static void pblk_line_put_ws(struct work_struct *work)
+{
+ struct pblk_line_ws *line_put_ws = container_of(work,
+ struct pblk_line_ws, ws);
+ struct pblk *pblk = line_put_ws->pblk;
+ struct pblk_line *line = line_put_ws->line;
+
+ __pblk_line_put(pblk, line);
+ mempool_free(line_put_ws, pblk->gen_ws_pool);
+}
+
+void pblk_line_put(struct kref *ref)
+{
+ struct pblk_line *line = container_of(ref, struct pblk_line, ref);
+ struct pblk *pblk = line->pblk;
+
+ __pblk_line_put(pblk, line);
+}
+
+void pblk_line_put_wq(struct kref *ref)
+{
+ struct pblk_line *line = container_of(ref, struct pblk_line, ref);
+ struct pblk *pblk = line->pblk;
+ struct pblk_line_ws *line_put_ws;
+
+ line_put_ws = mempool_alloc(pblk->gen_ws_pool, GFP_ATOMIC);
+ if (!line_put_ws)
+ return;
+
+ line_put_ws->pblk = pblk;
+ line_put_ws->line = line;
+ line_put_ws->priv = NULL;
+
+ INIT_WORK(&line_put_ws->ws, pblk_line_put_ws);
+ queue_work(pblk->r_end_wq, &line_put_ws->ws);
+}
+
int pblk_blk_erase_async(struct pblk *pblk, struct ppa_addr ppa)
{
struct nvm_rq *rqd;
int err;
- rqd = mempool_alloc(pblk->g_rq_pool, GFP_KERNEL);
- memset(rqd, 0, pblk_g_rq_size);
+ rqd = pblk_alloc_rqd(pblk, PBLK_ERASE);
pblk_setup_e_rq(pblk, rqd, ppa);
@@ -1517,41 +1584,6 @@ int pblk_line_is_full(struct pblk_line *line)
return (line->left_msecs == 0);
}
-void pblk_line_close_meta_sync(struct pblk *pblk)
-{
- struct pblk_line_mgmt *l_mg = &pblk->l_mg;
- struct pblk_line_meta *lm = &pblk->lm;
- struct pblk_line *line, *tline;
- LIST_HEAD(list);
-
- spin_lock(&l_mg->close_lock);
- if (list_empty(&l_mg->emeta_list)) {
- spin_unlock(&l_mg->close_lock);
- return;
- }
-
- list_cut_position(&list, &l_mg->emeta_list, l_mg->emeta_list.prev);
- spin_unlock(&l_mg->close_lock);
-
- list_for_each_entry_safe(line, tline, &list, list) {
- struct pblk_emeta *emeta = line->emeta;
-
- while (emeta->mem < lm->emeta_len[0]) {
- int ret;
-
- ret = pblk_submit_meta_io(pblk, line);
- if (ret) {
- pr_err("pblk: sync meta line %d failed (%d)\n",
- line->id, ret);
- return;
- }
- }
- }
-
- pblk_wait_for_meta(pblk);
- flush_workqueue(pblk->close_wq);
-}
-
static void pblk_line_should_sync_meta(struct pblk *pblk)
{
if (pblk_rl_is_limit(&pblk->rl))
@@ -1582,15 +1614,13 @@ void pblk_line_close(struct pblk *pblk, struct pblk_line *line)
list_add_tail(&line->list, move_list);
- mempool_free(line->map_bitmap, pblk->line_meta_pool);
+ kfree(line->map_bitmap);
line->map_bitmap = NULL;
line->smeta = NULL;
line->emeta = NULL;
spin_unlock(&line->lock);
spin_unlock(&l_mg->gc_lock);
-
- pblk_gc_should_kick(pblk);
}
void pblk_line_close_meta(struct pblk *pblk, struct pblk_line *line)
@@ -1624,43 +1654,16 @@ void pblk_line_close_ws(struct work_struct *work)
struct pblk_line *line = line_ws->line;
pblk_line_close(pblk, line);
- mempool_free(line_ws, pblk->line_ws_pool);
-}
-
-void pblk_line_mark_bb(struct work_struct *work)
-{
- struct pblk_line_ws *line_ws = container_of(work, struct pblk_line_ws,
- ws);
- struct pblk *pblk = line_ws->pblk;
- struct nvm_tgt_dev *dev = pblk->dev;
- struct ppa_addr *ppa = line_ws->priv;
- int ret;
-
- ret = nvm_set_tgt_bb_tbl(dev, ppa, 1, NVM_BLK_T_GRWN_BAD);
- if (ret) {
- struct pblk_line *line;
- int pos;
-
- line = &pblk->lines[pblk_dev_ppa_to_line(*ppa)];
- pos = pblk_dev_ppa_to_pos(&dev->geo, *ppa);
-
- pr_err("pblk: failed to mark bb, line:%d, pos:%d\n",
- line->id, pos);
- }
-
- kfree(ppa);
- mempool_free(line_ws, pblk->line_ws_pool);
+ mempool_free(line_ws, pblk->gen_ws_pool);
}
-void pblk_line_run_ws(struct pblk *pblk, struct pblk_line *line, void *priv,
- void (*work)(struct work_struct *),
+void pblk_gen_run_ws(struct pblk *pblk, struct pblk_line *line, void *priv,
+ void (*work)(struct work_struct *), gfp_t gfp_mask,
struct workqueue_struct *wq)
{
struct pblk_line_ws *line_ws;
- line_ws = mempool_alloc(pblk->line_ws_pool, GFP_ATOMIC);
- if (!line_ws)
- return;
+ line_ws = mempool_alloc(pblk->gen_ws_pool, gfp_mask);
line_ws->pblk = pblk;
line_ws->line = line;
@@ -1689,16 +1692,8 @@ static void __pblk_down_page(struct pblk *pblk, struct ppa_addr *ppa_list,
#endif
ret = down_timeout(&rlun->wr_sem, msecs_to_jiffies(30000));
- if (ret) {
- switch (ret) {
- case -ETIME:
- pr_err("pblk: lun semaphore timed out\n");
- break;
- case -EINTR:
- pr_err("pblk: lun semaphore timed out\n");
- break;
- }
- }
+ if (ret == -ETIME || ret == -EINTR)
+ pr_err("pblk: taking lun semaphore timed out: err %d\n", -ret);
}
void pblk_down_page(struct pblk *pblk, struct ppa_addr *ppa_list, int nr_ppas)
@@ -1758,13 +1753,11 @@ void pblk_up_rq(struct pblk *pblk, struct ppa_addr *ppa_list, int nr_ppas,
rlun = &pblk->luns[bit];
up(&rlun->wr_sem);
}
-
- kfree(lun_bitmap);
}
void pblk_update_map(struct pblk *pblk, sector_t lba, struct ppa_addr ppa)
{
- struct ppa_addr l2p_ppa;
+ struct ppa_addr ppa_l2p;
/* logic error: lba out-of-bounds. Ignore update */
if (!(lba < pblk->rl.nr_secs)) {
@@ -1773,10 +1766,10 @@ void pblk_update_map(struct pblk *pblk, sector_t lba, struct ppa_addr ppa)
}
spin_lock(&pblk->trans_lock);
- l2p_ppa = pblk_trans_map_get(pblk, lba);
+ ppa_l2p = pblk_trans_map_get(pblk, lba);
- if (!pblk_addr_in_cache(l2p_ppa) && !pblk_ppa_empty(l2p_ppa))
- pblk_map_invalidate(pblk, l2p_ppa);
+ if (!pblk_addr_in_cache(ppa_l2p) && !pblk_ppa_empty(ppa_l2p))
+ pblk_map_invalidate(pblk, ppa_l2p);
pblk_trans_map_set(pblk, lba, ppa);
spin_unlock(&pblk->trans_lock);
@@ -1784,6 +1777,7 @@ void pblk_update_map(struct pblk *pblk, sector_t lba, struct ppa_addr ppa)
void pblk_update_map_cache(struct pblk *pblk, sector_t lba, struct ppa_addr ppa)
{
+
#ifdef CONFIG_NVM_DEBUG
/* Callers must ensure that the ppa points to a cache address */
BUG_ON(!pblk_addr_in_cache(ppa));
@@ -1793,16 +1787,16 @@ void pblk_update_map_cache(struct pblk *pblk, sector_t lba, struct ppa_addr ppa)
pblk_update_map(pblk, lba, ppa);
}
-int pblk_update_map_gc(struct pblk *pblk, sector_t lba, struct ppa_addr ppa,
- struct pblk_line *gc_line)
+int pblk_update_map_gc(struct pblk *pblk, sector_t lba, struct ppa_addr ppa_new,
+ struct pblk_line *gc_line, u64 paddr_gc)
{
- struct ppa_addr l2p_ppa;
+ struct ppa_addr ppa_l2p, ppa_gc;
int ret = 1;
#ifdef CONFIG_NVM_DEBUG
/* Callers must ensure that the ppa points to a cache address */
- BUG_ON(!pblk_addr_in_cache(ppa));
- BUG_ON(pblk_rb_pos_oob(&pblk->rwb, pblk_addr_to_cacheline(ppa)));
+ BUG_ON(!pblk_addr_in_cache(ppa_new));
+ BUG_ON(pblk_rb_pos_oob(&pblk->rwb, pblk_addr_to_cacheline(ppa_new)));
#endif
/* logic error: lba out-of-bounds. Ignore update */
@@ -1812,36 +1806,41 @@ int pblk_update_map_gc(struct pblk *pblk, sector_t lba, struct ppa_addr ppa,
}
spin_lock(&pblk->trans_lock);
- l2p_ppa = pblk_trans_map_get(pblk, lba);
+ ppa_l2p = pblk_trans_map_get(pblk, lba);
+ ppa_gc = addr_to_gen_ppa(pblk, paddr_gc, gc_line->id);
+
+ if (!pblk_ppa_comp(ppa_l2p, ppa_gc)) {
+ spin_lock(&gc_line->lock);
+ WARN(!test_bit(paddr_gc, gc_line->invalid_bitmap),
+ "pblk: corrupted GC update");
+ spin_unlock(&gc_line->lock);
- /* Prevent updated entries to be overwritten by GC */
- if (pblk_addr_in_cache(l2p_ppa) || pblk_ppa_empty(l2p_ppa) ||
- pblk_tgt_ppa_to_line(l2p_ppa) != gc_line->id) {
ret = 0;
goto out;
}
- pblk_trans_map_set(pblk, lba, ppa);
+ pblk_trans_map_set(pblk, lba, ppa_new);
out:
spin_unlock(&pblk->trans_lock);
return ret;
}
-void pblk_update_map_dev(struct pblk *pblk, sector_t lba, struct ppa_addr ppa,
- struct ppa_addr entry_line)
+void pblk_update_map_dev(struct pblk *pblk, sector_t lba,
+ struct ppa_addr ppa_mapped, struct ppa_addr ppa_cache)
{
- struct ppa_addr l2p_line;
+ struct ppa_addr ppa_l2p;
#ifdef CONFIG_NVM_DEBUG
/* Callers must ensure that the ppa points to a device address */
- BUG_ON(pblk_addr_in_cache(ppa));
+ BUG_ON(pblk_addr_in_cache(ppa_mapped));
#endif
/* Invalidate and discard padded entries */
if (lba == ADDR_EMPTY) {
#ifdef CONFIG_NVM_DEBUG
atomic_long_inc(&pblk->padded_wb);
#endif
- pblk_map_invalidate(pblk, ppa);
+ if (!pblk_ppa_empty(ppa_mapped))
+ pblk_map_invalidate(pblk, ppa_mapped);
return;
}
@@ -1852,22 +1851,22 @@ void pblk_update_map_dev(struct pblk *pblk, sector_t lba, struct ppa_addr ppa,
}
spin_lock(&pblk->trans_lock);
- l2p_line = pblk_trans_map_get(pblk, lba);
+ ppa_l2p = pblk_trans_map_get(pblk, lba);
/* Do not update L2P if the cacheline has been updated. In this case,
* the mapped ppa must be invalidated
*/
- if (l2p_line.ppa != entry_line.ppa) {
- if (!pblk_ppa_empty(ppa))
- pblk_map_invalidate(pblk, ppa);
+ if (!pblk_ppa_comp(ppa_l2p, ppa_cache)) {
+ if (!pblk_ppa_empty(ppa_mapped))
+ pblk_map_invalidate(pblk, ppa_mapped);
goto out;
}
#ifdef CONFIG_NVM_DEBUG
- WARN_ON(!pblk_addr_in_cache(l2p_line) && !pblk_ppa_empty(l2p_line));
+ WARN_ON(!pblk_addr_in_cache(ppa_l2p) && !pblk_ppa_empty(ppa_l2p));
#endif
- pblk_trans_map_set(pblk, lba, ppa);
+ pblk_trans_map_set(pblk, lba, ppa_mapped);
out:
spin_unlock(&pblk->trans_lock);
}
@@ -1878,23 +1877,32 @@ void pblk_lookup_l2p_seq(struct pblk *pblk, struct ppa_addr *ppas,
int i;
spin_lock(&pblk->trans_lock);
- for (i = 0; i < nr_secs; i++)
- ppas[i] = pblk_trans_map_get(pblk, blba + i);
+ for (i = 0; i < nr_secs; i++) {
+ struct ppa_addr ppa;
+
+ ppa = ppas[i] = pblk_trans_map_get(pblk, blba + i);
+
+ /* If the L2P entry maps to a line, the reference is valid */
+ if (!pblk_ppa_empty(ppa) && !pblk_addr_in_cache(ppa)) {
+ int line_id = pblk_dev_ppa_to_line(ppa);
+ struct pblk_line *line = &pblk->lines[line_id];
+
+ kref_get(&line->ref);
+ }
+ }
spin_unlock(&pblk->trans_lock);
}
void pblk_lookup_l2p_rand(struct pblk *pblk, struct ppa_addr *ppas,
u64 *lba_list, int nr_secs)
{
- sector_t lba;
+ u64 lba;
int i;
spin_lock(&pblk->trans_lock);
for (i = 0; i < nr_secs; i++) {
lba = lba_list[i];
- if (lba == ADDR_EMPTY) {
- ppas[i].ppa = ADDR_EMPTY;
- } else {
+ if (lba != ADDR_EMPTY) {
/* logic error: lba out-of-bounds. Ignore update */
if (!(lba < pblk->rl.nr_secs)) {
WARN(1, "pblk: corrupted L2P map request\n");
diff --git a/drivers/lightnvm/pblk-gc.c b/drivers/lightnvm/pblk-gc.c
index 6090d28f7995..00d5698d64a9 100644
--- a/drivers/lightnvm/pblk-gc.c
+++ b/drivers/lightnvm/pblk-gc.c
@@ -20,7 +20,8 @@
static void pblk_gc_free_gc_rq(struct pblk_gc_rq *gc_rq)
{
- vfree(gc_rq->data);
+ if (gc_rq->data)
+ vfree(gc_rq->data);
kfree(gc_rq);
}
@@ -41,10 +42,7 @@ static int pblk_gc_write(struct pblk *pblk)
spin_unlock(&gc->w_lock);
list_for_each_entry_safe(gc_rq, tgc_rq, &w_list, list) {
- pblk_write_gc_to_cache(pblk, gc_rq->data, gc_rq->lba_list,
- gc_rq->nr_secs, gc_rq->secs_to_gc,
- gc_rq->line, PBLK_IOTYPE_GC);
-
+ pblk_write_gc_to_cache(pblk, gc_rq);
list_del(&gc_rq->list);
kref_put(&gc_rq->line->ref, pblk_line_put);
pblk_gc_free_gc_rq(gc_rq);
@@ -58,42 +56,59 @@ static void pblk_gc_writer_kick(struct pblk_gc *gc)
wake_up_process(gc->gc_writer_ts);
}
-/*
- * Responsible for managing all memory related to a gc request. Also in case of
- * failure
- */
-static int pblk_gc_move_valid_secs(struct pblk *pblk, struct pblk_gc_rq *gc_rq)
+static void pblk_put_line_back(struct pblk *pblk, struct pblk_line *line)
+{
+ struct pblk_line_mgmt *l_mg = &pblk->l_mg;
+ struct list_head *move_list;
+
+ spin_lock(&line->lock);
+ WARN_ON(line->state != PBLK_LINESTATE_GC);
+ line->state = PBLK_LINESTATE_CLOSED;
+ move_list = pblk_line_gc_list(pblk, line);
+ spin_unlock(&line->lock);
+
+ if (move_list) {
+ spin_lock(&l_mg->gc_lock);
+ list_add_tail(&line->list, move_list);
+ spin_unlock(&l_mg->gc_lock);
+ }
+}
+
+static void pblk_gc_line_ws(struct work_struct *work)
{
+ struct pblk_line_ws *gc_rq_ws = container_of(work,
+ struct pblk_line_ws, ws);
+ struct pblk *pblk = gc_rq_ws->pblk;
struct nvm_tgt_dev *dev = pblk->dev;
struct nvm_geo *geo = &dev->geo;
struct pblk_gc *gc = &pblk->gc;
- struct pblk_line *line = gc_rq->line;
- void *data;
- unsigned int secs_to_gc;
- int ret = 0;
+ struct pblk_line *line = gc_rq_ws->line;
+ struct pblk_gc_rq *gc_rq = gc_rq_ws->priv;
+ int ret;
- data = vmalloc(gc_rq->nr_secs * geo->sec_size);
- if (!data) {
- ret = -ENOMEM;
+ up(&gc->gc_sem);
+
+ gc_rq->data = vmalloc(gc_rq->nr_secs * geo->sec_size);
+ if (!gc_rq->data) {
+ pr_err("pblk: could not GC line:%d (%d/%d)\n",
+ line->id, *line->vsc, gc_rq->nr_secs);
goto out;
}
/* Read from GC victim block */
- if (pblk_submit_read_gc(pblk, gc_rq->lba_list, data, gc_rq->nr_secs,
- &secs_to_gc, line)) {
- ret = -EFAULT;
- goto free_data;
+ ret = pblk_submit_read_gc(pblk, gc_rq);
+ if (ret) {
+ pr_err("pblk: failed GC read in line:%d (err:%d)\n",
+ line->id, ret);
+ goto out;
}
- if (!secs_to_gc)
- goto free_rq;
-
- gc_rq->data = data;
- gc_rq->secs_to_gc = secs_to_gc;
+ if (!gc_rq->secs_to_gc)
+ goto out;
retry:
spin_lock(&gc->w_lock);
- if (gc->w_entries >= PBLK_GC_W_QD) {
+ if (gc->w_entries >= PBLK_GC_RQ_QD) {
spin_unlock(&gc->w_lock);
pblk_gc_writer_kick(&pblk->gc);
usleep_range(128, 256);
@@ -105,53 +120,13 @@ retry:
pblk_gc_writer_kick(&pblk->gc);
- return 0;
+ kfree(gc_rq_ws);
+ return;
-free_rq:
- kfree(gc_rq);
-free_data:
- vfree(data);
out:
+ pblk_gc_free_gc_rq(gc_rq);
kref_put(&line->ref, pblk_line_put);
- return ret;
-}
-
-static void pblk_put_line_back(struct pblk *pblk, struct pblk_line *line)
-{
- struct pblk_line_mgmt *l_mg = &pblk->l_mg;
- struct list_head *move_list;
-
- spin_lock(&line->lock);
- WARN_ON(line->state != PBLK_LINESTATE_GC);
- line->state = PBLK_LINESTATE_CLOSED;
- move_list = pblk_line_gc_list(pblk, line);
- spin_unlock(&line->lock);
-
- if (move_list) {
- spin_lock(&l_mg->gc_lock);
- list_add_tail(&line->list, move_list);
- spin_unlock(&l_mg->gc_lock);
- }
-}
-
-static void pblk_gc_line_ws(struct work_struct *work)
-{
- struct pblk_line_ws *line_rq_ws = container_of(work,
- struct pblk_line_ws, ws);
- struct pblk *pblk = line_rq_ws->pblk;
- struct pblk_gc *gc = &pblk->gc;
- struct pblk_line *line = line_rq_ws->line;
- struct pblk_gc_rq *gc_rq = line_rq_ws->priv;
-
- up(&gc->gc_sem);
-
- if (pblk_gc_move_valid_secs(pblk, gc_rq)) {
- pr_err("pblk: could not GC all sectors: line:%d (%d/%d)\n",
- line->id, *line->vsc,
- gc_rq->nr_secs);
- }
-
- mempool_free(line_rq_ws, pblk->line_ws_pool);
+ kfree(gc_rq_ws);
}
static void pblk_gc_line_prepare_ws(struct work_struct *work)
@@ -164,17 +139,24 @@ static void pblk_gc_line_prepare_ws(struct work_struct *work)
struct pblk_line_meta *lm = &pblk->lm;
struct pblk_gc *gc = &pblk->gc;
struct line_emeta *emeta_buf;
- struct pblk_line_ws *line_rq_ws;
+ struct pblk_line_ws *gc_rq_ws;
struct pblk_gc_rq *gc_rq;
__le64 *lba_list;
+ unsigned long *invalid_bitmap;
int sec_left, nr_secs, bit;
int ret;
+ invalid_bitmap = kmalloc(lm->sec_bitmap_len, GFP_KERNEL);
+ if (!invalid_bitmap) {
+ pr_err("pblk: could not allocate GC invalid bitmap\n");
+ goto fail_free_ws;
+ }
+
emeta_buf = pblk_malloc(lm->emeta_len[0], l_mg->emeta_alloc_type,
GFP_KERNEL);
if (!emeta_buf) {
pr_err("pblk: cannot use GC emeta\n");
- return;
+ goto fail_free_bitmap;
}
ret = pblk_line_read_emeta(pblk, line, emeta_buf);
@@ -193,7 +175,11 @@ static void pblk_gc_line_prepare_ws(struct work_struct *work)
goto fail_free_emeta;
}
+ spin_lock(&line->lock);
+ bitmap_copy(invalid_bitmap, line->invalid_bitmap, lm->sec_per_line);
sec_left = pblk_line_vsc(line);
+ spin_unlock(&line->lock);
+
if (sec_left < 0) {
pr_err("pblk: corrupted GC line (%d)\n", line->id);
goto fail_free_emeta;
@@ -207,11 +193,12 @@ next_rq:
nr_secs = 0;
do {
- bit = find_next_zero_bit(line->invalid_bitmap, lm->sec_per_line,
+ bit = find_next_zero_bit(invalid_bitmap, lm->sec_per_line,
bit + 1);
if (bit > line->emeta_ssec)
break;
+ gc_rq->paddr_list[nr_secs] = bit;
gc_rq->lba_list[nr_secs++] = le64_to_cpu(lba_list[bit]);
} while (nr_secs < pblk->max_write_pgs);
@@ -223,19 +210,25 @@ next_rq:
gc_rq->nr_secs = nr_secs;
gc_rq->line = line;
- line_rq_ws = mempool_alloc(pblk->line_ws_pool, GFP_KERNEL);
- if (!line_rq_ws)
+ gc_rq_ws = kmalloc(sizeof(struct pblk_line_ws), GFP_KERNEL);
+ if (!gc_rq_ws)
goto fail_free_gc_rq;
- line_rq_ws->pblk = pblk;
- line_rq_ws->line = line;
- line_rq_ws->priv = gc_rq;
+ gc_rq_ws->pblk = pblk;
+ gc_rq_ws->line = line;
+ gc_rq_ws->priv = gc_rq;
+
+ /* The write GC path can be much slower than the read GC one due to
+ * the budget imposed by the rate-limiter. Balance in case that we get
+ * back pressure from the write GC path.
+ */
+ while (down_timeout(&gc->gc_sem, msecs_to_jiffies(30000)))
+ io_schedule();
- down(&gc->gc_sem);
kref_get(&line->ref);
- INIT_WORK(&line_rq_ws->ws, pblk_gc_line_ws);
- queue_work(gc->gc_line_reader_wq, &line_rq_ws->ws);
+ INIT_WORK(&gc_rq_ws->ws, pblk_gc_line_ws);
+ queue_work(gc->gc_line_reader_wq, &gc_rq_ws->ws);
sec_left -= nr_secs;
if (sec_left > 0)
@@ -243,10 +236,11 @@ next_rq:
out:
pblk_mfree(emeta_buf, l_mg->emeta_alloc_type);
- mempool_free(line_ws, pblk->line_ws_pool);
+ kfree(line_ws);
+ kfree(invalid_bitmap);
kref_put(&line->ref, pblk_line_put);
- atomic_dec(&gc->inflight_gc);
+ atomic_dec(&gc->read_inflight_gc);
return;
@@ -254,10 +248,14 @@ fail_free_gc_rq:
kfree(gc_rq);
fail_free_emeta:
pblk_mfree(emeta_buf, l_mg->emeta_alloc_type);
+fail_free_bitmap:
+ kfree(invalid_bitmap);
+fail_free_ws:
+ kfree(line_ws);
+
pblk_put_line_back(pblk, line);
kref_put(&line->ref, pblk_line_put);
- mempool_free(line_ws, pblk->line_ws_pool);
- atomic_dec(&gc->inflight_gc);
+ atomic_dec(&gc->read_inflight_gc);
pr_err("pblk: Failed to GC line %d\n", line->id);
}
@@ -269,19 +267,40 @@ static int pblk_gc_line(struct pblk *pblk, struct pblk_line *line)
pr_debug("pblk: line '%d' being reclaimed for GC\n", line->id);
- line_ws = mempool_alloc(pblk->line_ws_pool, GFP_KERNEL);
+ line_ws = kmalloc(sizeof(struct pblk_line_ws), GFP_KERNEL);
if (!line_ws)
return -ENOMEM;
line_ws->pblk = pblk;
line_ws->line = line;
+ atomic_inc(&gc->pipeline_gc);
INIT_WORK(&line_ws->ws, pblk_gc_line_prepare_ws);
queue_work(gc->gc_reader_wq, &line_ws->ws);
return 0;
}
+static void pblk_gc_reader_kick(struct pblk_gc *gc)
+{
+ wake_up_process(gc->gc_reader_ts);
+}
+
+static void pblk_gc_kick(struct pblk *pblk)
+{
+ struct pblk_gc *gc = &pblk->gc;
+
+ pblk_gc_writer_kick(gc);
+ pblk_gc_reader_kick(gc);
+
+ /* If we're shutting down GC, let's not start it up again */
+ if (gc->gc_enabled) {
+ wake_up_process(gc->gc_ts);
+ mod_timer(&gc->gc_timer,
+ jiffies + msecs_to_jiffies(GC_TIME_MSECS));
+ }
+}
+
static int pblk_gc_read(struct pblk *pblk)
{
struct pblk_gc *gc = &pblk->gc;
@@ -305,11 +324,6 @@ static int pblk_gc_read(struct pblk *pblk)
return 0;
}
-static void pblk_gc_reader_kick(struct pblk_gc *gc)
-{
- wake_up_process(gc->gc_reader_ts);
-}
-
static struct pblk_line *pblk_gc_get_victim_line(struct pblk *pblk,
struct list_head *group_list)
{
@@ -338,26 +352,17 @@ static bool pblk_gc_should_run(struct pblk_gc *gc, struct pblk_rl *rl)
return ((gc->gc_active) && (nr_blocks_need > nr_blocks_free));
}
-/*
- * Lines with no valid sectors will be returned to the free list immediately. If
- * GC is activated - either because the free block count is under the determined
- * threshold, or because it is being forced from user space - only lines with a
- * high count of invalid sectors will be recycled.
- */
-static void pblk_gc_run(struct pblk *pblk)
+void pblk_gc_free_full_lines(struct pblk *pblk)
{
struct pblk_line_mgmt *l_mg = &pblk->l_mg;
struct pblk_gc *gc = &pblk->gc;
struct pblk_line *line;
- struct list_head *group_list;
- bool run_gc;
- int inflight_gc, gc_group = 0, prev_group = 0;
do {
spin_lock(&l_mg->gc_lock);
if (list_empty(&l_mg->gc_full_list)) {
spin_unlock(&l_mg->gc_lock);
- break;
+ return;
}
line = list_first_entry(&l_mg->gc_full_list,
@@ -371,11 +376,30 @@ static void pblk_gc_run(struct pblk *pblk)
list_del(&line->list);
spin_unlock(&l_mg->gc_lock);
+ atomic_inc(&gc->pipeline_gc);
kref_put(&line->ref, pblk_line_put);
} while (1);
+}
+
+/*
+ * Lines with no valid sectors will be returned to the free list immediately. If
+ * GC is activated - either because the free block count is under the determined
+ * threshold, or because it is being forced from user space - only lines with a
+ * high count of invalid sectors will be recycled.
+ */
+static void pblk_gc_run(struct pblk *pblk)
+{
+ struct pblk_line_mgmt *l_mg = &pblk->l_mg;
+ struct pblk_gc *gc = &pblk->gc;
+ struct pblk_line *line;
+ struct list_head *group_list;
+ bool run_gc;
+ int read_inflight_gc, gc_group = 0, prev_group = 0;
+
+ pblk_gc_free_full_lines(pblk);
run_gc = pblk_gc_should_run(&pblk->gc, &pblk->rl);
- if (!run_gc || (atomic_read(&gc->inflight_gc) >= PBLK_GC_L_QD))
+ if (!run_gc || (atomic_read(&gc->read_inflight_gc) >= PBLK_GC_L_QD))
return;
next_gc_group:
@@ -402,14 +426,14 @@ next_gc_group:
list_add_tail(&line->list, &gc->r_list);
spin_unlock(&gc->r_lock);
- inflight_gc = atomic_inc_return(&gc->inflight_gc);
+ read_inflight_gc = atomic_inc_return(&gc->read_inflight_gc);
pblk_gc_reader_kick(gc);
prev_group = 1;
/* No need to queue up more GC lines than we can handle */
run_gc = pblk_gc_should_run(&pblk->gc, &pblk->rl);
- if (!run_gc || inflight_gc >= PBLK_GC_L_QD)
+ if (!run_gc || read_inflight_gc >= PBLK_GC_L_QD)
break;
} while (1);
@@ -418,16 +442,6 @@ next_gc_group:
goto next_gc_group;
}
-void pblk_gc_kick(struct pblk *pblk)
-{
- struct pblk_gc *gc = &pblk->gc;
-
- wake_up_process(gc->gc_ts);
- pblk_gc_writer_kick(gc);
- pblk_gc_reader_kick(gc);
- mod_timer(&gc->gc_timer, jiffies + msecs_to_jiffies(GC_TIME_MSECS));
-}
-
static void pblk_gc_timer(unsigned long data)
{
struct pblk *pblk = (struct pblk *)data;
@@ -465,6 +479,7 @@ static int pblk_gc_writer_ts(void *data)
static int pblk_gc_reader_ts(void *data)
{
struct pblk *pblk = data;
+ struct pblk_gc *gc = &pblk->gc;
while (!kthread_should_stop()) {
if (!pblk_gc_read(pblk))
@@ -473,6 +488,18 @@ static int pblk_gc_reader_ts(void *data)
io_schedule();
}
+#ifdef CONFIG_NVM_DEBUG
+ pr_info("pblk: flushing gc pipeline, %d lines left\n",
+ atomic_read(&gc->pipeline_gc));
+#endif
+
+ do {
+ if (!atomic_read(&gc->pipeline_gc))
+ break;
+
+ schedule();
+ } while (1);
+
return 0;
}
@@ -486,10 +513,10 @@ void pblk_gc_should_start(struct pblk *pblk)
{
struct pblk_gc *gc = &pblk->gc;
- if (gc->gc_enabled && !gc->gc_active)
+ if (gc->gc_enabled && !gc->gc_active) {
pblk_gc_start(pblk);
-
- pblk_gc_kick(pblk);
+ pblk_gc_kick(pblk);
+ }
}
/*
@@ -510,6 +537,11 @@ void pblk_gc_should_stop(struct pblk *pblk)
pblk_gc_stop(pblk, 0);
}
+void pblk_gc_should_kick(struct pblk *pblk)
+{
+ pblk_rl_update_rates(&pblk->rl);
+}
+
void pblk_gc_sysfs_state_show(struct pblk *pblk, int *gc_enabled,
int *gc_active)
{
@@ -576,7 +608,8 @@ int pblk_gc_init(struct pblk *pblk)
gc->gc_forced = 0;
gc->gc_enabled = 1;
gc->w_entries = 0;
- atomic_set(&gc->inflight_gc, 0);
+ atomic_set(&gc->read_inflight_gc, 0);
+ atomic_set(&gc->pipeline_gc, 0);
/* Workqueue that reads valid sectors from a line and submit them to the
* GC writer to be recycled.
@@ -602,7 +635,7 @@ int pblk_gc_init(struct pblk *pblk)
spin_lock_init(&gc->w_lock);
spin_lock_init(&gc->r_lock);
- sema_init(&gc->gc_sem, 128);
+ sema_init(&gc->gc_sem, PBLK_GC_RQ_QD);
INIT_LIST_HEAD(&gc->w_list);
INIT_LIST_HEAD(&gc->r_list);
@@ -625,24 +658,24 @@ void pblk_gc_exit(struct pblk *pblk)
{
struct pblk_gc *gc = &pblk->gc;
- flush_workqueue(gc->gc_reader_wq);
- flush_workqueue(gc->gc_line_reader_wq);
-
- del_timer(&gc->gc_timer);
+ gc->gc_enabled = 0;
+ del_timer_sync(&gc->gc_timer);
pblk_gc_stop(pblk, 1);
if (gc->gc_ts)
kthread_stop(gc->gc_ts);
+ if (gc->gc_reader_ts)
+ kthread_stop(gc->gc_reader_ts);
+
+ flush_workqueue(gc->gc_reader_wq);
if (gc->gc_reader_wq)
destroy_workqueue(gc->gc_reader_wq);
+ flush_workqueue(gc->gc_line_reader_wq);
if (gc->gc_line_reader_wq)
destroy_workqueue(gc->gc_line_reader_wq);
if (gc->gc_writer_ts)
kthread_stop(gc->gc_writer_ts);
-
- if (gc->gc_reader_ts)
- kthread_stop(gc->gc_reader_ts);
}
diff --git a/drivers/lightnvm/pblk-init.c b/drivers/lightnvm/pblk-init.c
index 1b0f61233c21..f62112ba5482 100644
--- a/drivers/lightnvm/pblk-init.c
+++ b/drivers/lightnvm/pblk-init.c
@@ -20,8 +20,8 @@
#include "pblk.h"
-static struct kmem_cache *pblk_blk_ws_cache, *pblk_rec_cache, *pblk_g_rq_cache,
- *pblk_w_rq_cache, *pblk_line_meta_cache;
+static struct kmem_cache *pblk_ws_cache, *pblk_rec_cache, *pblk_g_rq_cache,
+ *pblk_w_rq_cache;
static DECLARE_RWSEM(pblk_lock);
struct bio_set *pblk_bio_set;
@@ -46,7 +46,7 @@ static int pblk_rw_io(struct request_queue *q, struct pblk *pblk,
* user I/Os. Unless stalled, the rate limiter leaves at least 256KB
* available for user I/O.
*/
- if (unlikely(pblk_get_secs(bio) >= pblk_rl_sysfs_rate_show(&pblk->rl)))
+ if (pblk_get_secs(bio) > pblk_rl_max_io(&pblk->rl))
blk_queue_split(q, &bio);
return pblk_write_to_cache(pblk, bio, PBLK_IOTYPE_USER);
@@ -76,6 +76,28 @@ static blk_qc_t pblk_make_rq(struct request_queue *q, struct bio *bio)
return BLK_QC_T_NONE;
}
+static size_t pblk_trans_map_size(struct pblk *pblk)
+{
+ int entry_size = 8;
+
+ if (pblk->ppaf_bitsize < 32)
+ entry_size = 4;
+
+ return entry_size * pblk->rl.nr_secs;
+}
+
+#ifdef CONFIG_NVM_DEBUG
+static u32 pblk_l2p_crc(struct pblk *pblk)
+{
+ size_t map_size;
+ u32 crc = ~(u32)0;
+
+ map_size = pblk_trans_map_size(pblk);
+ crc = crc32_le(crc, pblk->trans_map, map_size);
+ return crc;
+}
+#endif
+
static void pblk_l2p_free(struct pblk *pblk)
{
vfree(pblk->trans_map);
@@ -85,12 +107,10 @@ static int pblk_l2p_init(struct pblk *pblk)
{
sector_t i;
struct ppa_addr ppa;
- int entry_size = 8;
+ size_t map_size;
- if (pblk->ppaf_bitsize < 32)
- entry_size = 4;
-
- pblk->trans_map = vmalloc(entry_size * pblk->rl.nr_secs);
+ map_size = pblk_trans_map_size(pblk);
+ pblk->trans_map = vmalloc(map_size);
if (!pblk->trans_map)
return -ENOMEM;
@@ -132,7 +152,6 @@ static int pblk_rwb_init(struct pblk *pblk)
}
/* Minimum pages needed within a lun */
-#define PAGE_POOL_SIZE 16
#define ADDR_POOL_SIZE 64
static int pblk_set_ppaf(struct pblk *pblk)
@@ -182,12 +201,10 @@ static int pblk_set_ppaf(struct pblk *pblk)
static int pblk_init_global_caches(struct pblk *pblk)
{
- char cache_name[PBLK_CACHE_NAME_LEN];
-
down_write(&pblk_lock);
- pblk_blk_ws_cache = kmem_cache_create("pblk_blk_ws",
+ pblk_ws_cache = kmem_cache_create("pblk_blk_ws",
sizeof(struct pblk_line_ws), 0, 0, NULL);
- if (!pblk_blk_ws_cache) {
+ if (!pblk_ws_cache) {
up_write(&pblk_lock);
return -ENOMEM;
}
@@ -195,7 +212,7 @@ static int pblk_init_global_caches(struct pblk *pblk)
pblk_rec_cache = kmem_cache_create("pblk_rec",
sizeof(struct pblk_rec_ctx), 0, 0, NULL);
if (!pblk_rec_cache) {
- kmem_cache_destroy(pblk_blk_ws_cache);
+ kmem_cache_destroy(pblk_ws_cache);
up_write(&pblk_lock);
return -ENOMEM;
}
@@ -203,7 +220,7 @@ static int pblk_init_global_caches(struct pblk *pblk)
pblk_g_rq_cache = kmem_cache_create("pblk_g_rq", pblk_g_rq_size,
0, 0, NULL);
if (!pblk_g_rq_cache) {
- kmem_cache_destroy(pblk_blk_ws_cache);
+ kmem_cache_destroy(pblk_ws_cache);
kmem_cache_destroy(pblk_rec_cache);
up_write(&pblk_lock);
return -ENOMEM;
@@ -212,30 +229,25 @@ static int pblk_init_global_caches(struct pblk *pblk)
pblk_w_rq_cache = kmem_cache_create("pblk_w_rq", pblk_w_rq_size,
0, 0, NULL);
if (!pblk_w_rq_cache) {
- kmem_cache_destroy(pblk_blk_ws_cache);
+ kmem_cache_destroy(pblk_ws_cache);
kmem_cache_destroy(pblk_rec_cache);
kmem_cache_destroy(pblk_g_rq_cache);
up_write(&pblk_lock);
return -ENOMEM;
}
-
- snprintf(cache_name, sizeof(cache_name), "pblk_line_m_%s",
- pblk->disk->disk_name);
- pblk_line_meta_cache = kmem_cache_create(cache_name,
- pblk->lm.sec_bitmap_len, 0, 0, NULL);
- if (!pblk_line_meta_cache) {
- kmem_cache_destroy(pblk_blk_ws_cache);
- kmem_cache_destroy(pblk_rec_cache);
- kmem_cache_destroy(pblk_g_rq_cache);
- kmem_cache_destroy(pblk_w_rq_cache);
- up_write(&pblk_lock);
- return -ENOMEM;
- }
up_write(&pblk_lock);
return 0;
}
+static void pblk_free_global_caches(struct pblk *pblk)
+{
+ kmem_cache_destroy(pblk_ws_cache);
+ kmem_cache_destroy(pblk_rec_cache);
+ kmem_cache_destroy(pblk_g_rq_cache);
+ kmem_cache_destroy(pblk_w_rq_cache);
+}
+
static int pblk_core_init(struct pblk *pblk)
{
struct nvm_tgt_dev *dev = pblk->dev;
@@ -247,70 +259,80 @@ static int pblk_core_init(struct pblk *pblk)
if (pblk_init_global_caches(pblk))
return -ENOMEM;
- pblk->page_pool = mempool_create_page_pool(PAGE_POOL_SIZE, 0);
- if (!pblk->page_pool)
- return -ENOMEM;
+ /* Internal bios can be at most the sectors signaled by the device. */
+ pblk->page_bio_pool = mempool_create_page_pool(nvm_max_phys_sects(dev),
+ 0);
+ if (!pblk->page_bio_pool)
+ goto free_global_caches;
- pblk->line_ws_pool = mempool_create_slab_pool(PBLK_WS_POOL_SIZE,
- pblk_blk_ws_cache);
- if (!pblk->line_ws_pool)
- goto free_page_pool;
+ pblk->gen_ws_pool = mempool_create_slab_pool(PBLK_GEN_WS_POOL_SIZE,
+ pblk_ws_cache);
+ if (!pblk->gen_ws_pool)
+ goto free_page_bio_pool;
pblk->rec_pool = mempool_create_slab_pool(geo->nr_luns, pblk_rec_cache);
if (!pblk->rec_pool)
- goto free_blk_ws_pool;
+ goto free_gen_ws_pool;
- pblk->g_rq_pool = mempool_create_slab_pool(PBLK_READ_REQ_POOL_SIZE,
+ pblk->r_rq_pool = mempool_create_slab_pool(geo->nr_luns,
pblk_g_rq_cache);
- if (!pblk->g_rq_pool)
+ if (!pblk->r_rq_pool)
goto free_rec_pool;
- pblk->w_rq_pool = mempool_create_slab_pool(geo->nr_luns * 2,
+ pblk->e_rq_pool = mempool_create_slab_pool(geo->nr_luns,
+ pblk_g_rq_cache);
+ if (!pblk->e_rq_pool)
+ goto free_r_rq_pool;
+
+ pblk->w_rq_pool = mempool_create_slab_pool(geo->nr_luns,
pblk_w_rq_cache);
if (!pblk->w_rq_pool)
- goto free_g_rq_pool;
-
- pblk->line_meta_pool =
- mempool_create_slab_pool(PBLK_META_POOL_SIZE,
- pblk_line_meta_cache);
- if (!pblk->line_meta_pool)
- goto free_w_rq_pool;
+ goto free_e_rq_pool;
pblk->close_wq = alloc_workqueue("pblk-close-wq",
WQ_MEM_RECLAIM | WQ_UNBOUND, PBLK_NR_CLOSE_JOBS);
if (!pblk->close_wq)
- goto free_line_meta_pool;
+ goto free_w_rq_pool;
pblk->bb_wq = alloc_workqueue("pblk-bb-wq",
WQ_MEM_RECLAIM | WQ_UNBOUND, 0);
if (!pblk->bb_wq)
goto free_close_wq;
- if (pblk_set_ppaf(pblk))
+ pblk->r_end_wq = alloc_workqueue("pblk-read-end-wq",
+ WQ_MEM_RECLAIM | WQ_UNBOUND, 0);
+ if (!pblk->r_end_wq)
goto free_bb_wq;
+ if (pblk_set_ppaf(pblk))
+ goto free_r_end_wq;
+
if (pblk_rwb_init(pblk))
- goto free_bb_wq;
+ goto free_r_end_wq;
INIT_LIST_HEAD(&pblk->compl_list);
return 0;
+free_r_end_wq:
+ destroy_workqueue(pblk->r_end_wq);
free_bb_wq:
destroy_workqueue(pblk->bb_wq);
free_close_wq:
destroy_workqueue(pblk->close_wq);
-free_line_meta_pool:
- mempool_destroy(pblk->line_meta_pool);
free_w_rq_pool:
mempool_destroy(pblk->w_rq_pool);
-free_g_rq_pool:
- mempool_destroy(pblk->g_rq_pool);
+free_e_rq_pool:
+ mempool_destroy(pblk->e_rq_pool);
+free_r_rq_pool:
+ mempool_destroy(pblk->r_rq_pool);
free_rec_pool:
mempool_destroy(pblk->rec_pool);
-free_blk_ws_pool:
- mempool_destroy(pblk->line_ws_pool);
-free_page_pool:
- mempool_destroy(pblk->page_pool);
+free_gen_ws_pool:
+ mempool_destroy(pblk->gen_ws_pool);
+free_page_bio_pool:
+ mempool_destroy(pblk->page_bio_pool);
+free_global_caches:
+ pblk_free_global_caches(pblk);
return -ENOMEM;
}
@@ -319,21 +341,20 @@ static void pblk_core_free(struct pblk *pblk)
if (pblk->close_wq)
destroy_workqueue(pblk->close_wq);
+ if (pblk->r_end_wq)
+ destroy_workqueue(pblk->r_end_wq);
+
if (pblk->bb_wq)
destroy_workqueue(pblk->bb_wq);
- mempool_destroy(pblk->page_pool);
- mempool_destroy(pblk->line_ws_pool);
+ mempool_destroy(pblk->page_bio_pool);
+ mempool_destroy(pblk->gen_ws_pool);
mempool_destroy(pblk->rec_pool);
- mempool_destroy(pblk->g_rq_pool);
+ mempool_destroy(pblk->r_rq_pool);
+ mempool_destroy(pblk->e_rq_pool);
mempool_destroy(pblk->w_rq_pool);
- mempool_destroy(pblk->line_meta_pool);
- kmem_cache_destroy(pblk_blk_ws_cache);
- kmem_cache_destroy(pblk_rec_cache);
- kmem_cache_destroy(pblk_g_rq_cache);
- kmem_cache_destroy(pblk_w_rq_cache);
- kmem_cache_destroy(pblk_line_meta_cache);
+ pblk_free_global_caches(pblk);
}
static void pblk_luns_free(struct pblk *pblk)
@@ -372,13 +393,11 @@ static void pblk_line_meta_free(struct pblk *pblk)
kfree(l_mg->bb_aux);
kfree(l_mg->vsc_list);
- spin_lock(&l_mg->free_lock);
for (i = 0; i < PBLK_DATA_LINES; i++) {
kfree(l_mg->sline_meta[i]);
pblk_mfree(l_mg->eline_meta[i]->buf, l_mg->emeta_alloc_type);
kfree(l_mg->eline_meta[i]);
}
- spin_unlock(&l_mg->free_lock);
kfree(pblk->lines);
}
@@ -507,6 +526,13 @@ static int pblk_lines_configure(struct pblk *pblk, int flags)
}
}
+#ifdef CONFIG_NVM_DEBUG
+ pr_info("pblk init: L2P CRC: %x\n", pblk_l2p_crc(pblk));
+#endif
+
+ /* Free full lines directly as GC has not been started yet */
+ pblk_gc_free_full_lines(pblk);
+
if (!line) {
/* Configure next line for user data */
line = pblk_line_get_first_data(pblk);
@@ -630,7 +656,10 @@ static int pblk_lines_alloc_metadata(struct pblk *pblk)
fail_free_emeta:
while (--i >= 0) {
- vfree(l_mg->eline_meta[i]->buf);
+ if (l_mg->emeta_alloc_type == PBLK_VMALLOC_META)
+ vfree(l_mg->eline_meta[i]->buf);
+ else
+ kfree(l_mg->eline_meta[i]->buf);
kfree(l_mg->eline_meta[i]);
}
@@ -681,8 +710,8 @@ static int pblk_lines_init(struct pblk *pblk)
lm->blk_bitmap_len = BITS_TO_LONGS(geo->nr_luns) * sizeof(long);
lm->sec_bitmap_len = BITS_TO_LONGS(lm->sec_per_line) * sizeof(long);
lm->lun_bitmap_len = BITS_TO_LONGS(geo->nr_luns) * sizeof(long);
- lm->high_thrs = lm->sec_per_line / 2;
- lm->mid_thrs = lm->sec_per_line / 4;
+ lm->mid_thrs = lm->sec_per_line / 2;
+ lm->high_thrs = lm->sec_per_line / 4;
lm->meta_distance = (geo->nr_luns / 2) * pblk->min_write_pgs;
/* Calculate necessary pages for smeta. See comment over struct
@@ -713,9 +742,13 @@ add_emeta_page:
goto add_emeta_page;
}
- lm->emeta_bb = geo->nr_luns - i;
- lm->min_blk_line = 1 + DIV_ROUND_UP(lm->smeta_sec + lm->emeta_sec[0],
- geo->sec_per_blk);
+ lm->emeta_bb = geo->nr_luns > i ? geo->nr_luns - i : 0;
+
+ lm->min_blk_line = 1;
+ if (geo->nr_luns > 1)
+ lm->min_blk_line += DIV_ROUND_UP(lm->smeta_sec +
+ lm->emeta_sec[0], geo->sec_per_blk);
+
if (lm->min_blk_line > lm->blk_per_line) {
pr_err("pblk: config. not supported. Min. LUN in line:%d\n",
lm->blk_per_line);
@@ -890,6 +923,11 @@ static void pblk_exit(void *private)
down_write(&pblk_lock);
pblk_gc_exit(pblk);
pblk_tear_down(pblk);
+
+#ifdef CONFIG_NVM_DEBUG
+ pr_info("pblk exit: L2P CRC: %x\n", pblk_l2p_crc(pblk));
+#endif
+
pblk_free(pblk);
up_write(&pblk_lock);
}
@@ -911,7 +949,7 @@ static void *pblk_init(struct nvm_tgt_dev *dev, struct gendisk *tdisk,
int ret;
if (dev->identity.dom & NVM_RSP_L2P) {
- pr_err("pblk: device-side L2P table not supported. (%x)\n",
+ pr_err("pblk: host-side L2P table not supported. (%x)\n",
dev->identity.dom);
return ERR_PTR(-EINVAL);
}
@@ -923,6 +961,7 @@ static void *pblk_init(struct nvm_tgt_dev *dev, struct gendisk *tdisk,
pblk->dev = dev;
pblk->disk = tdisk;
pblk->state = PBLK_STATE_RUNNING;
+ pblk->gc.gc_enabled = 0;
spin_lock_init(&pblk->trans_lock);
spin_lock_init(&pblk->lock);
@@ -944,6 +983,7 @@ static void *pblk_init(struct nvm_tgt_dev *dev, struct gendisk *tdisk,
atomic_long_set(&pblk->recov_writes, 0);
atomic_long_set(&pblk->recov_writes, 0);
atomic_long_set(&pblk->recov_gc_writes, 0);
+ atomic_long_set(&pblk->recov_gc_reads, 0);
#endif
atomic_long_set(&pblk->read_failed, 0);
@@ -1012,6 +1052,10 @@ static void *pblk_init(struct nvm_tgt_dev *dev, struct gendisk *tdisk,
pblk->rwb.nr_entries);
wake_up_process(pblk->writer_ts);
+
+ /* Check if we need to start GC */
+ pblk_gc_should_kick(pblk);
+
return pblk;
fail_stop_writer:
@@ -1044,6 +1088,7 @@ static struct nvm_tgt_type tt_pblk = {
.sysfs_init = pblk_sysfs_init,
.sysfs_exit = pblk_sysfs_exit,
+ .owner = THIS_MODULE,
};
static int __init pblk_module_init(void)
diff --git a/drivers/lightnvm/pblk-map.c b/drivers/lightnvm/pblk-map.c
index fddb924f6dde..6f3ecde2140f 100644
--- a/drivers/lightnvm/pblk-map.c
+++ b/drivers/lightnvm/pblk-map.c
@@ -25,16 +25,28 @@ static void pblk_map_page_data(struct pblk *pblk, unsigned int sentry,
unsigned int valid_secs)
{
struct pblk_line *line = pblk_line_get_data(pblk);
- struct pblk_emeta *emeta = line->emeta;
+ struct pblk_emeta *emeta;
struct pblk_w_ctx *w_ctx;
- __le64 *lba_list = emeta_to_lbas(pblk, emeta->buf);
+ __le64 *lba_list;
u64 paddr;
int nr_secs = pblk->min_write_pgs;
int i;
+ if (pblk_line_is_full(line)) {
+ struct pblk_line *prev_line = line;
+
+ line = pblk_line_replace_data(pblk);
+ pblk_line_close_meta(pblk, prev_line);
+ }
+
+ emeta = line->emeta;
+ lba_list = emeta_to_lbas(pblk, emeta->buf);
+
paddr = pblk_alloc_page(pblk, line, nr_secs);
for (i = 0; i < nr_secs; i++, paddr++) {
+ __le64 addr_empty = cpu_to_le64(ADDR_EMPTY);
+
/* ppa to be sent to the device */
ppa_list[i] = addr_to_gen_ppa(pblk, paddr, line->id);
@@ -51,22 +63,14 @@ static void pblk_map_page_data(struct pblk *pblk, unsigned int sentry,
w_ctx->ppa = ppa_list[i];
meta_list[i].lba = cpu_to_le64(w_ctx->lba);
lba_list[paddr] = cpu_to_le64(w_ctx->lba);
- line->nr_valid_lbas++;
+ if (lba_list[paddr] != addr_empty)
+ line->nr_valid_lbas++;
} else {
- __le64 addr_empty = cpu_to_le64(ADDR_EMPTY);
-
lba_list[paddr] = meta_list[i].lba = addr_empty;
__pblk_map_invalidate(pblk, line, paddr);
}
}
- if (pblk_line_is_full(line)) {
- struct pblk_line *prev_line = line;
-
- pblk_line_replace_data(pblk);
- pblk_line_close_meta(pblk, prev_line);
- }
-
pblk_down_rq(pblk, ppa_list, nr_secs, lun_bitmap);
}
diff --git a/drivers/lightnvm/pblk-rb.c b/drivers/lightnvm/pblk-rb.c
index 9bc32578a766..b8f78e401482 100644
--- a/drivers/lightnvm/pblk-rb.c
+++ b/drivers/lightnvm/pblk-rb.c
@@ -201,8 +201,7 @@ unsigned int pblk_rb_read_commit(struct pblk_rb *rb, unsigned int nr_entries)
return subm;
}
-static int __pblk_rb_update_l2p(struct pblk_rb *rb, unsigned int *l2p_upd,
- unsigned int to_update)
+static int __pblk_rb_update_l2p(struct pblk_rb *rb, unsigned int to_update)
{
struct pblk *pblk = container_of(rb, struct pblk, rwb);
struct pblk_line *line;
@@ -213,7 +212,7 @@ static int __pblk_rb_update_l2p(struct pblk_rb *rb, unsigned int *l2p_upd,
int flags;
for (i = 0; i < to_update; i++) {
- entry = &rb->entries[*l2p_upd];
+ entry = &rb->entries[rb->l2p_update];
w_ctx = &entry->w_ctx;
flags = READ_ONCE(entry->w_ctx.flags);
@@ -230,7 +229,7 @@ static int __pblk_rb_update_l2p(struct pblk_rb *rb, unsigned int *l2p_upd,
line = &pblk->lines[pblk_tgt_ppa_to_line(w_ctx->ppa)];
kref_put(&line->ref, pblk_line_put);
clean_wctx(w_ctx);
- *l2p_upd = (*l2p_upd + 1) & (rb->nr_entries - 1);
+ rb->l2p_update = (rb->l2p_update + 1) & (rb->nr_entries - 1);
}
pblk_rl_out(&pblk->rl, user_io, gc_io);
@@ -258,7 +257,7 @@ static int pblk_rb_update_l2p(struct pblk_rb *rb, unsigned int nr_entries,
count = nr_entries - space;
/* l2p_update used exclusively under rb->w_lock */
- ret = __pblk_rb_update_l2p(rb, &rb->l2p_update, count);
+ ret = __pblk_rb_update_l2p(rb, count);
out:
return ret;
@@ -280,7 +279,7 @@ void pblk_rb_sync_l2p(struct pblk_rb *rb)
sync = smp_load_acquire(&rb->sync);
to_update = pblk_rb_ring_count(sync, rb->l2p_update, rb->nr_entries);
- __pblk_rb_update_l2p(rb, &rb->l2p_update, to_update);
+ __pblk_rb_update_l2p(rb, to_update);
spin_unlock(&rb->w_lock);
}
@@ -325,8 +324,8 @@ void pblk_rb_write_entry_user(struct pblk_rb *rb, void *data,
}
void pblk_rb_write_entry_gc(struct pblk_rb *rb, void *data,
- struct pblk_w_ctx w_ctx, struct pblk_line *gc_line,
- unsigned int ring_pos)
+ struct pblk_w_ctx w_ctx, struct pblk_line *line,
+ u64 paddr, unsigned int ring_pos)
{
struct pblk *pblk = container_of(rb, struct pblk, rwb);
struct pblk_rb_entry *entry;
@@ -341,7 +340,7 @@ void pblk_rb_write_entry_gc(struct pblk_rb *rb, void *data,
__pblk_rb_write_entry(rb, data, w_ctx, entry);
- if (!pblk_update_map_gc(pblk, w_ctx.lba, entry->cacheline, gc_line))
+ if (!pblk_update_map_gc(pblk, w_ctx.lba, entry->cacheline, line, paddr))
entry->w_ctx.lba = ADDR_EMPTY;
flags = w_ctx.flags | PBLK_WRITTEN_DATA;
@@ -355,7 +354,6 @@ static int pblk_rb_sync_point_set(struct pblk_rb *rb, struct bio *bio,
{
struct pblk_rb_entry *entry;
unsigned int subm, sync_point;
- int flags;
subm = READ_ONCE(rb->subm);
@@ -369,12 +367,6 @@ static int pblk_rb_sync_point_set(struct pblk_rb *rb, struct bio *bio,
sync_point = (pos == 0) ? (rb->nr_entries - 1) : (pos - 1);
entry = &rb->entries[sync_point];
- flags = READ_ONCE(entry->w_ctx.flags);
- flags |= PBLK_FLUSH_ENTRY;
-
- /* Release flags on context. Protect from writes */
- smp_store_release(&entry->w_ctx.flags, flags);
-
/* Protect syncs */
smp_store_release(&rb->sync_point, sync_point);
@@ -454,6 +446,7 @@ static int pblk_rb_may_write_flush(struct pblk_rb *rb, unsigned int nr_entries,
/* Protect from read count */
smp_store_release(&rb->mem, mem);
+
return 1;
}
@@ -558,12 +551,13 @@ out:
* persist data on the write buffer to the media.
*/
unsigned int pblk_rb_read_to_bio(struct pblk_rb *rb, struct nvm_rq *rqd,
- struct bio *bio, unsigned int pos,
- unsigned int nr_entries, unsigned int count)
+ unsigned int pos, unsigned int nr_entries,
+ unsigned int count)
{
struct pblk *pblk = container_of(rb, struct pblk, rwb);
struct request_queue *q = pblk->dev->q;
struct pblk_c_ctx *c_ctx = nvm_rq_to_pdu(rqd);
+ struct bio *bio = rqd->bio;
struct pblk_rb_entry *entry;
struct page *page;
unsigned int pad = 0, to_read = nr_entries;
diff --git a/drivers/lightnvm/pblk-read.c b/drivers/lightnvm/pblk-read.c
index d682e89e6493..ca79d8fb3e60 100644
--- a/drivers/lightnvm/pblk-read.c
+++ b/drivers/lightnvm/pblk-read.c
@@ -39,21 +39,15 @@ static int pblk_read_from_cache(struct pblk *pblk, struct bio *bio,
}
static void pblk_read_ppalist_rq(struct pblk *pblk, struct nvm_rq *rqd,
- unsigned long *read_bitmap)
+ sector_t blba, unsigned long *read_bitmap)
{
+ struct pblk_sec_meta *meta_list = rqd->meta_list;
struct bio *bio = rqd->bio;
struct ppa_addr ppas[PBLK_MAX_REQ_ADDRS];
- sector_t blba = pblk_get_lba(bio);
int nr_secs = rqd->nr_ppas;
bool advanced_bio = false;
int i, j = 0;
- /* logic error: lba out-of-bounds. Ignore read request */
- if (blba + nr_secs >= pblk->rl.nr_secs) {
- WARN(1, "pblk: read lbas out of bounds\n");
- return;
- }
-
pblk_lookup_l2p_seq(pblk, ppas, blba, nr_secs);
for (i = 0; i < nr_secs; i++) {
@@ -63,6 +57,7 @@ static void pblk_read_ppalist_rq(struct pblk *pblk, struct nvm_rq *rqd,
retry:
if (pblk_ppa_empty(p)) {
WARN_ON(test_and_set_bit(i, read_bitmap));
+ meta_list[i].lba = cpu_to_le64(ADDR_EMPTY);
if (unlikely(!advanced_bio)) {
bio_advance(bio, (i) * PBLK_EXPOSED_PAGE_SIZE);
@@ -82,6 +77,7 @@ retry:
goto retry;
}
WARN_ON(test_and_set_bit(i, read_bitmap));
+ meta_list[i].lba = cpu_to_le64(lba);
advanced_bio = true;
#ifdef CONFIG_NVM_DEBUG
atomic_long_inc(&pblk->cache_reads);
@@ -117,10 +113,51 @@ static int pblk_submit_read_io(struct pblk *pblk, struct nvm_rq *rqd)
return NVM_IO_OK;
}
-static void pblk_end_io_read(struct nvm_rq *rqd)
+static void pblk_read_check(struct pblk *pblk, struct nvm_rq *rqd,
+ sector_t blba)
+{
+ struct pblk_sec_meta *meta_list = rqd->meta_list;
+ int nr_lbas = rqd->nr_ppas;
+ int i;
+
+ for (i = 0; i < nr_lbas; i++) {
+ u64 lba = le64_to_cpu(meta_list[i].lba);
+
+ if (lba == ADDR_EMPTY)
+ continue;
+
+ WARN(lba != blba + i, "pblk: corrupted read LBA\n");
+ }
+}
+
+static void pblk_read_put_rqd_kref(struct pblk *pblk, struct nvm_rq *rqd)
+{
+ struct ppa_addr *ppa_list;
+ int i;
+
+ ppa_list = (rqd->nr_ppas > 1) ? rqd->ppa_list : &rqd->ppa_addr;
+
+ for (i = 0; i < rqd->nr_ppas; i++) {
+ struct ppa_addr ppa = ppa_list[i];
+ struct pblk_line *line;
+
+ line = &pblk->lines[pblk_dev_ppa_to_line(ppa)];
+ kref_put(&line->ref, pblk_line_put_wq);
+ }
+}
+
+static void pblk_end_user_read(struct bio *bio)
+{
+#ifdef CONFIG_NVM_DEBUG
+ WARN_ONCE(bio->bi_status, "pblk: corrupted read bio\n");
+#endif
+ bio_endio(bio);
+ bio_put(bio);
+}
+
+static void __pblk_end_io_read(struct pblk *pblk, struct nvm_rq *rqd,
+ bool put_line)
{
- struct pblk *pblk = rqd->private;
- struct nvm_tgt_dev *dev = pblk->dev;
struct pblk_g_ctx *r_ctx = nvm_rq_to_pdu(rqd);
struct bio *bio = rqd->bio;
@@ -131,47 +168,51 @@ static void pblk_end_io_read(struct nvm_rq *rqd)
WARN_ONCE(bio->bi_status, "pblk: corrupted read error\n");
#endif
- nvm_dev_dma_free(dev->parent, rqd->meta_list, rqd->dma_meta_list);
+ pblk_read_check(pblk, rqd, r_ctx->lba);
bio_put(bio);
- if (r_ctx->private) {
- struct bio *orig_bio = r_ctx->private;
+ if (r_ctx->private)
+ pblk_end_user_read((struct bio *)r_ctx->private);
-#ifdef CONFIG_NVM_DEBUG
- WARN_ONCE(orig_bio->bi_status, "pblk: corrupted read bio\n");
-#endif
- bio_endio(orig_bio);
- bio_put(orig_bio);
- }
+ if (put_line)
+ pblk_read_put_rqd_kref(pblk, rqd);
#ifdef CONFIG_NVM_DEBUG
atomic_long_add(rqd->nr_ppas, &pblk->sync_reads);
atomic_long_sub(rqd->nr_ppas, &pblk->inflight_reads);
#endif
- pblk_free_rqd(pblk, rqd, READ);
+ pblk_free_rqd(pblk, rqd, PBLK_READ);
atomic_dec(&pblk->inflight_io);
}
+static void pblk_end_io_read(struct nvm_rq *rqd)
+{
+ struct pblk *pblk = rqd->private;
+
+ __pblk_end_io_read(pblk, rqd, true);
+}
+
static int pblk_fill_partial_read_bio(struct pblk *pblk, struct nvm_rq *rqd,
unsigned int bio_init_idx,
unsigned long *read_bitmap)
{
struct bio *new_bio, *bio = rqd->bio;
+ struct pblk_sec_meta *meta_list = rqd->meta_list;
struct bio_vec src_bv, dst_bv;
void *ppa_ptr = NULL;
void *src_p, *dst_p;
dma_addr_t dma_ppa_list = 0;
+ __le64 *lba_list_mem, *lba_list_media;
int nr_secs = rqd->nr_ppas;
int nr_holes = nr_secs - bitmap_weight(read_bitmap, nr_secs);
int i, ret, hole;
- DECLARE_COMPLETION_ONSTACK(wait);
+
+ /* Re-use allocated memory for intermediate lbas */
+ lba_list_mem = (((void *)rqd->ppa_list) + pblk_dma_ppa_size);
+ lba_list_media = (((void *)rqd->ppa_list) + 2 * pblk_dma_ppa_size);
new_bio = bio_alloc(GFP_KERNEL, nr_holes);
- if (!new_bio) {
- pr_err("pblk: could not alloc read bio\n");
- return NVM_IO_ERR;
- }
if (pblk_bio_add_pages(pblk, new_bio, GFP_KERNEL, nr_holes))
goto err;
@@ -181,34 +222,29 @@ static int pblk_fill_partial_read_bio(struct pblk *pblk, struct nvm_rq *rqd,
goto err;
}
+ for (i = 0; i < nr_secs; i++)
+ lba_list_mem[i] = meta_list[i].lba;
+
new_bio->bi_iter.bi_sector = 0; /* internal bio */
bio_set_op_attrs(new_bio, REQ_OP_READ, 0);
- new_bio->bi_private = &wait;
- new_bio->bi_end_io = pblk_end_bio_sync;
rqd->bio = new_bio;
rqd->nr_ppas = nr_holes;
rqd->flags = pblk_set_read_mode(pblk, PBLK_READ_RANDOM);
- rqd->end_io = NULL;
- if (unlikely(nr_secs > 1 && nr_holes == 1)) {
+ if (unlikely(nr_holes == 1)) {
ppa_ptr = rqd->ppa_list;
dma_ppa_list = rqd->dma_ppa_list;
rqd->ppa_addr = rqd->ppa_list[0];
}
- ret = pblk_submit_read_io(pblk, rqd);
+ ret = pblk_submit_io_sync(pblk, rqd);
if (ret) {
bio_put(rqd->bio);
- pr_err("pblk: read IO submission failed\n");
+ pr_err("pblk: sync read IO submission failed\n");
goto err;
}
- if (!wait_for_completion_io_timeout(&wait,
- msecs_to_jiffies(PBLK_COMMAND_TIMEOUT_MS))) {
- pr_err("pblk: partial read I/O timed out\n");
- }
-
if (rqd->error) {
atomic_long_inc(&pblk->read_failed);
#ifdef CONFIG_NVM_DEBUG
@@ -216,15 +252,31 @@ static int pblk_fill_partial_read_bio(struct pblk *pblk, struct nvm_rq *rqd,
#endif
}
- if (unlikely(nr_secs > 1 && nr_holes == 1)) {
+ if (unlikely(nr_holes == 1)) {
+ struct ppa_addr ppa;
+
+ ppa = rqd->ppa_addr;
rqd->ppa_list = ppa_ptr;
rqd->dma_ppa_list = dma_ppa_list;
+ rqd->ppa_list[0] = ppa;
+ }
+
+ for (i = 0; i < nr_secs; i++) {
+ lba_list_media[i] = meta_list[i].lba;
+ meta_list[i].lba = lba_list_mem[i];
}
/* Fill the holes in the original bio */
i = 0;
hole = find_first_zero_bit(read_bitmap, nr_secs);
do {
+ int line_id = pblk_dev_ppa_to_line(rqd->ppa_list[i]);
+ struct pblk_line *line = &pblk->lines[line_id];
+
+ kref_put(&line->ref, pblk_line_put);
+
+ meta_list[hole].lba = lba_list_media[i];
+
src_bv = new_bio->bi_io_vec[i++];
dst_bv = bio->bi_io_vec[bio_init_idx + hole];
@@ -238,7 +290,7 @@ static int pblk_fill_partial_read_bio(struct pblk *pblk, struct nvm_rq *rqd,
kunmap_atomic(src_p);
kunmap_atomic(dst_p);
- mempool_free(src_bv.bv_page, pblk->page_pool);
+ mempool_free(src_bv.bv_page, pblk->page_bio_pool);
hole = find_next_zero_bit(read_bitmap, nr_secs, hole + 1);
} while (hole < nr_secs);
@@ -246,34 +298,26 @@ static int pblk_fill_partial_read_bio(struct pblk *pblk, struct nvm_rq *rqd,
bio_put(new_bio);
/* Complete the original bio and associated request */
+ bio_endio(bio);
rqd->bio = bio;
rqd->nr_ppas = nr_secs;
- rqd->private = pblk;
- bio_endio(bio);
- pblk_end_io_read(rqd);
+ __pblk_end_io_read(pblk, rqd, false);
return NVM_IO_OK;
err:
/* Free allocated pages in new bio */
pblk_bio_free_pages(pblk, bio, 0, new_bio->bi_vcnt);
- rqd->private = pblk;
- pblk_end_io_read(rqd);
+ __pblk_end_io_read(pblk, rqd, false);
return NVM_IO_ERR;
}
static void pblk_read_rq(struct pblk *pblk, struct nvm_rq *rqd,
- unsigned long *read_bitmap)
+ sector_t lba, unsigned long *read_bitmap)
{
+ struct pblk_sec_meta *meta_list = rqd->meta_list;
struct bio *bio = rqd->bio;
struct ppa_addr ppa;
- sector_t lba = pblk_get_lba(bio);
-
- /* logic error: lba out-of-bounds. Ignore read request */
- if (lba >= pblk->rl.nr_secs) {
- WARN(1, "pblk: read lba out of bounds\n");
- return;
- }
pblk_lookup_l2p_seq(pblk, &ppa, lba, 1);
@@ -284,6 +328,7 @@ static void pblk_read_rq(struct pblk *pblk, struct nvm_rq *rqd,
retry:
if (pblk_ppa_empty(ppa)) {
WARN_ON(test_and_set_bit(0, read_bitmap));
+ meta_list[0].lba = cpu_to_le64(ADDR_EMPTY);
return;
}
@@ -295,9 +340,12 @@ retry:
pblk_lookup_l2p_seq(pblk, &ppa, lba, 1);
goto retry;
}
+
WARN_ON(test_and_set_bit(0, read_bitmap));
+ meta_list[0].lba = cpu_to_le64(lba);
+
#ifdef CONFIG_NVM_DEBUG
- atomic_long_inc(&pblk->cache_reads);
+ atomic_long_inc(&pblk->cache_reads);
#endif
} else {
rqd->ppa_addr = ppa;
@@ -309,22 +357,24 @@ retry:
int pblk_submit_read(struct pblk *pblk, struct bio *bio)
{
struct nvm_tgt_dev *dev = pblk->dev;
+ sector_t blba = pblk_get_lba(bio);
unsigned int nr_secs = pblk_get_secs(bio);
+ struct pblk_g_ctx *r_ctx;
struct nvm_rq *rqd;
- unsigned long read_bitmap; /* Max 64 ppas per request */
unsigned int bio_init_idx;
+ unsigned long read_bitmap; /* Max 64 ppas per request */
int ret = NVM_IO_ERR;
- if (nr_secs > PBLK_MAX_REQ_ADDRS)
+ /* logic error: lba out-of-bounds. Ignore read request */
+ if (blba >= pblk->rl.nr_secs || nr_secs > PBLK_MAX_REQ_ADDRS) {
+ WARN(1, "pblk: read lba out of bounds (lba:%llu, nr:%d)\n",
+ (unsigned long long)blba, nr_secs);
return NVM_IO_ERR;
+ }
bitmap_zero(&read_bitmap, nr_secs);
- rqd = pblk_alloc_rqd(pblk, READ);
- if (IS_ERR(rqd)) {
- pr_err_ratelimited("pblk: not able to alloc rqd");
- return NVM_IO_ERR;
- }
+ rqd = pblk_alloc_rqd(pblk, PBLK_READ);
rqd->opcode = NVM_OP_PREAD;
rqd->bio = bio;
@@ -332,6 +382,9 @@ int pblk_submit_read(struct pblk *pblk, struct bio *bio)
rqd->private = pblk;
rqd->end_io = pblk_end_io_read;
+ r_ctx = nvm_rq_to_pdu(rqd);
+ r_ctx->lba = blba;
+
/* Save the index for this bio's start. This is needed in case
* we need to fill a partial read.
*/
@@ -348,23 +401,22 @@ int pblk_submit_read(struct pblk *pblk, struct bio *bio)
rqd->ppa_list = rqd->meta_list + pblk_dma_meta_size;
rqd->dma_ppa_list = rqd->dma_meta_list + pblk_dma_meta_size;
- pblk_read_ppalist_rq(pblk, rqd, &read_bitmap);
+ pblk_read_ppalist_rq(pblk, rqd, blba, &read_bitmap);
} else {
- pblk_read_rq(pblk, rqd, &read_bitmap);
+ pblk_read_rq(pblk, rqd, blba, &read_bitmap);
}
bio_get(bio);
if (bitmap_full(&read_bitmap, nr_secs)) {
bio_endio(bio);
atomic_inc(&pblk->inflight_io);
- pblk_end_io_read(rqd);
+ __pblk_end_io_read(pblk, rqd, false);
return NVM_IO_OK;
}
/* All sectors are to be read from the device */
if (bitmap_empty(&read_bitmap, rqd->nr_ppas)) {
struct bio *int_bio = NULL;
- struct pblk_g_ctx *r_ctx = nvm_rq_to_pdu(rqd);
/* Clone read bio to deal with read errors internally */
int_bio = bio_clone_fast(bio, GFP_KERNEL, pblk_bio_set);
@@ -399,40 +451,46 @@ int pblk_submit_read(struct pblk *pblk, struct bio *bio)
return NVM_IO_OK;
fail_rqd_free:
- pblk_free_rqd(pblk, rqd, READ);
+ pblk_free_rqd(pblk, rqd, PBLK_READ);
return ret;
}
static int read_ppalist_rq_gc(struct pblk *pblk, struct nvm_rq *rqd,
struct pblk_line *line, u64 *lba_list,
- unsigned int nr_secs)
+ u64 *paddr_list_gc, unsigned int nr_secs)
{
- struct ppa_addr ppas[PBLK_MAX_REQ_ADDRS];
+ struct ppa_addr ppa_list_l2p[PBLK_MAX_REQ_ADDRS];
+ struct ppa_addr ppa_gc;
int valid_secs = 0;
int i;
- pblk_lookup_l2p_rand(pblk, ppas, lba_list, nr_secs);
+ pblk_lookup_l2p_rand(pblk, ppa_list_l2p, lba_list, nr_secs);
for (i = 0; i < nr_secs; i++) {
- if (pblk_addr_in_cache(ppas[i]) || ppas[i].g.blk != line->id ||
- pblk_ppa_empty(ppas[i])) {
- lba_list[i] = ADDR_EMPTY;
+ if (lba_list[i] == ADDR_EMPTY)
+ continue;
+
+ ppa_gc = addr_to_gen_ppa(pblk, paddr_list_gc[i], line->id);
+ if (!pblk_ppa_comp(ppa_list_l2p[i], ppa_gc)) {
+ paddr_list_gc[i] = lba_list[i] = ADDR_EMPTY;
continue;
}
- rqd->ppa_list[valid_secs++] = ppas[i];
+ rqd->ppa_list[valid_secs++] = ppa_list_l2p[i];
}
#ifdef CONFIG_NVM_DEBUG
atomic_long_add(valid_secs, &pblk->inflight_reads);
#endif
+
return valid_secs;
}
static int read_rq_gc(struct pblk *pblk, struct nvm_rq *rqd,
- struct pblk_line *line, sector_t lba)
+ struct pblk_line *line, sector_t lba,
+ u64 paddr_gc)
{
- struct ppa_addr ppa;
+ struct ppa_addr ppa_l2p, ppa_gc;
int valid_secs = 0;
if (lba == ADDR_EMPTY)
@@ -445,15 +503,14 @@ static int read_rq_gc(struct pblk *pblk, struct nvm_rq *rqd,
}
spin_lock(&pblk->trans_lock);
- ppa = pblk_trans_map_get(pblk, lba);
+ ppa_l2p = pblk_trans_map_get(pblk, lba);
spin_unlock(&pblk->trans_lock);
- /* Ignore updated values until the moment */
- if (pblk_addr_in_cache(ppa) || ppa.g.blk != line->id ||
- pblk_ppa_empty(ppa))
+ ppa_gc = addr_to_gen_ppa(pblk, paddr_gc, line->id);
+ if (!pblk_ppa_comp(ppa_l2p, ppa_gc))
goto out;
- rqd->ppa_addr = ppa;
+ rqd->ppa_addr = ppa_l2p;
valid_secs = 1;
#ifdef CONFIG_NVM_DEBUG
@@ -464,42 +521,44 @@ out:
return valid_secs;
}
-int pblk_submit_read_gc(struct pblk *pblk, u64 *lba_list, void *data,
- unsigned int nr_secs, unsigned int *secs_to_gc,
- struct pblk_line *line)
+int pblk_submit_read_gc(struct pblk *pblk, struct pblk_gc_rq *gc_rq)
{
struct nvm_tgt_dev *dev = pblk->dev;
struct nvm_geo *geo = &dev->geo;
struct bio *bio;
struct nvm_rq rqd;
- int ret, data_len;
- DECLARE_COMPLETION_ONSTACK(wait);
+ int data_len;
+ int ret = NVM_IO_OK;
memset(&rqd, 0, sizeof(struct nvm_rq));
rqd.meta_list = nvm_dev_dma_alloc(dev->parent, GFP_KERNEL,
&rqd.dma_meta_list);
if (!rqd.meta_list)
- return NVM_IO_ERR;
+ return -ENOMEM;
- if (nr_secs > 1) {
+ if (gc_rq->nr_secs > 1) {
rqd.ppa_list = rqd.meta_list + pblk_dma_meta_size;
rqd.dma_ppa_list = rqd.dma_meta_list + pblk_dma_meta_size;
- *secs_to_gc = read_ppalist_rq_gc(pblk, &rqd, line, lba_list,
- nr_secs);
- if (*secs_to_gc == 1)
+ gc_rq->secs_to_gc = read_ppalist_rq_gc(pblk, &rqd, gc_rq->line,
+ gc_rq->lba_list,
+ gc_rq->paddr_list,
+ gc_rq->nr_secs);
+ if (gc_rq->secs_to_gc == 1)
rqd.ppa_addr = rqd.ppa_list[0];
} else {
- *secs_to_gc = read_rq_gc(pblk, &rqd, line, lba_list[0]);
+ gc_rq->secs_to_gc = read_rq_gc(pblk, &rqd, gc_rq->line,
+ gc_rq->lba_list[0],
+ gc_rq->paddr_list[0]);
}
- if (!(*secs_to_gc))
+ if (!(gc_rq->secs_to_gc))
goto out;
- data_len = (*secs_to_gc) * geo->sec_size;
- bio = pblk_bio_map_addr(pblk, data, *secs_to_gc, data_len,
- PBLK_KMALLOC_META, GFP_KERNEL);
+ data_len = (gc_rq->secs_to_gc) * geo->sec_size;
+ bio = pblk_bio_map_addr(pblk, gc_rq->data, gc_rq->secs_to_gc, data_len,
+ PBLK_VMALLOC_META, GFP_KERNEL);
if (IS_ERR(bio)) {
pr_err("pblk: could not allocate GC bio (%lu)\n", PTR_ERR(bio));
goto err_free_dma;
@@ -509,23 +568,16 @@ int pblk_submit_read_gc(struct pblk *pblk, u64 *lba_list, void *data,
bio_set_op_attrs(bio, REQ_OP_READ, 0);
rqd.opcode = NVM_OP_PREAD;
- rqd.end_io = pblk_end_io_sync;
- rqd.private = &wait;
- rqd.nr_ppas = *secs_to_gc;
+ rqd.nr_ppas = gc_rq->secs_to_gc;
rqd.flags = pblk_set_read_mode(pblk, PBLK_READ_RANDOM);
rqd.bio = bio;
- ret = pblk_submit_read_io(pblk, &rqd);
- if (ret) {
- bio_endio(bio);
+ if (pblk_submit_io_sync(pblk, &rqd)) {
+ ret = -EIO;
pr_err("pblk: GC read request failed\n");
- goto err_free_dma;
+ goto err_free_bio;
}
- if (!wait_for_completion_io_timeout(&wait,
- msecs_to_jiffies(PBLK_COMMAND_TIMEOUT_MS))) {
- pr_err("pblk: GC read I/O timed out\n");
- }
atomic_dec(&pblk->inflight_io);
if (rqd.error) {
@@ -536,16 +588,18 @@ int pblk_submit_read_gc(struct pblk *pblk, u64 *lba_list, void *data,
}
#ifdef CONFIG_NVM_DEBUG
- atomic_long_add(*secs_to_gc, &pblk->sync_reads);
- atomic_long_add(*secs_to_gc, &pblk->recov_gc_reads);
- atomic_long_sub(*secs_to_gc, &pblk->inflight_reads);
+ atomic_long_add(gc_rq->secs_to_gc, &pblk->sync_reads);
+ atomic_long_add(gc_rq->secs_to_gc, &pblk->recov_gc_reads);
+ atomic_long_sub(gc_rq->secs_to_gc, &pblk->inflight_reads);
#endif
out:
nvm_dev_dma_free(dev->parent, rqd.meta_list, rqd.dma_meta_list);
- return NVM_IO_OK;
+ return ret;
+err_free_bio:
+ bio_put(bio);
err_free_dma:
nvm_dev_dma_free(dev->parent, rqd.meta_list, rqd.dma_meta_list);
- return NVM_IO_ERR;
+ return ret;
}
diff --git a/drivers/lightnvm/pblk-recovery.c b/drivers/lightnvm/pblk-recovery.c
index cb556e06673e..eadb3eb5d4dc 100644
--- a/drivers/lightnvm/pblk-recovery.c
+++ b/drivers/lightnvm/pblk-recovery.c
@@ -34,10 +34,6 @@ void pblk_submit_rec(struct work_struct *work)
max_secs);
bio = bio_alloc(GFP_KERNEL, nr_rec_secs);
- if (!bio) {
- pr_err("pblk: not able to create recovery bio\n");
- return;
- }
bio->bi_iter.bi_sector = 0;
bio_set_op_attrs(bio, REQ_OP_WRITE, 0);
@@ -71,7 +67,7 @@ void pblk_submit_rec(struct work_struct *work)
err:
bio_put(bio);
- pblk_free_rqd(pblk, rqd, WRITE);
+ pblk_free_rqd(pblk, rqd, PBLK_WRITE);
}
int pblk_recov_setup_rq(struct pblk *pblk, struct pblk_c_ctx *c_ctx,
@@ -84,12 +80,7 @@ int pblk_recov_setup_rq(struct pblk *pblk, struct pblk_c_ctx *c_ctx,
struct pblk_c_ctx *rec_ctx;
int nr_entries = c_ctx->nr_valid + c_ctx->nr_padded;
- rec_rqd = pblk_alloc_rqd(pblk, WRITE);
- if (IS_ERR(rec_rqd)) {
- pr_err("pblk: could not create recovery req.\n");
- return -ENOMEM;
- }
-
+ rec_rqd = pblk_alloc_rqd(pblk, PBLK_WRITE);
rec_ctx = nvm_rq_to_pdu(rec_rqd);
/* Copy completion bitmap, but exclude the first X completed entries */
@@ -142,19 +133,19 @@ static int pblk_recov_l2p_from_emeta(struct pblk *pblk, struct pblk_line *line)
struct pblk_emeta *emeta = line->emeta;
struct line_emeta *emeta_buf = emeta->buf;
__le64 *lba_list;
- int data_start;
- int nr_data_lbas, nr_valid_lbas, nr_lbas = 0;
- int i;
+ u64 data_start, data_end;
+ u64 nr_valid_lbas, nr_lbas = 0;
+ u64 i;
lba_list = pblk_recov_get_lba_list(pblk, emeta_buf);
if (!lba_list)
return 1;
data_start = pblk_line_smeta_start(pblk, line) + lm->smeta_sec;
- nr_data_lbas = lm->sec_per_line - lm->emeta_sec[0];
+ data_end = line->emeta_ssec;
nr_valid_lbas = le64_to_cpu(emeta_buf->nr_valid_lbas);
- for (i = data_start; i < nr_data_lbas && nr_lbas < nr_valid_lbas; i++) {
+ for (i = data_start; i < data_end; i++) {
struct ppa_addr ppa;
int pos;
@@ -181,8 +172,8 @@ static int pblk_recov_l2p_from_emeta(struct pblk *pblk, struct pblk_line *line)
}
if (nr_valid_lbas != nr_lbas)
- pr_err("pblk: line %d - inconsistent lba list(%llu/%d)\n",
- line->id, emeta_buf->nr_valid_lbas, nr_lbas);
+ pr_err("pblk: line %d - inconsistent lba list(%llu/%llu)\n",
+ line->id, nr_valid_lbas, nr_lbas);
line->left_msecs = 0;
@@ -225,7 +216,6 @@ static int pblk_recov_read_oob(struct pblk *pblk, struct pblk_line *line,
int rq_ppas, rq_len;
int i, j;
int ret = 0;
- DECLARE_COMPLETION_ONSTACK(wait);
ppa_list = p.ppa_list;
meta_list = p.meta_list;
@@ -262,8 +252,6 @@ next_read_rq:
rqd->ppa_list = ppa_list;
rqd->dma_ppa_list = dma_ppa_list;
rqd->dma_meta_list = dma_meta_list;
- rqd->end_io = pblk_end_io_sync;
- rqd->private = &wait;
if (pblk_io_aligned(pblk, rq_ppas))
rqd->flags = pblk_set_read_mode(pblk, PBLK_READ_SEQUENTIAL);
@@ -289,19 +277,13 @@ next_read_rq:
}
/* If read fails, more padding is needed */
- ret = pblk_submit_io(pblk, rqd);
+ ret = pblk_submit_io_sync(pblk, rqd);
if (ret) {
pr_err("pblk: I/O submission failed: %d\n", ret);
return ret;
}
- if (!wait_for_completion_io_timeout(&wait,
- msecs_to_jiffies(PBLK_COMMAND_TIMEOUT_MS))) {
- pr_err("pblk: L2P recovery read timed out\n");
- return -EINTR;
- }
atomic_dec(&pblk->inflight_io);
- reinit_completion(&wait);
/* At this point, the read should not fail. If it does, it is a problem
* we cannot recover from here. Need FTL log.
@@ -338,13 +320,10 @@ static void pblk_end_io_recov(struct nvm_rq *rqd)
{
struct pblk_pad_rq *pad_rq = rqd->private;
struct pblk *pblk = pad_rq->pblk;
- struct nvm_tgt_dev *dev = pblk->dev;
pblk_up_page(pblk, rqd->ppa_list, rqd->nr_ppas);
- bio_put(rqd->bio);
- nvm_dev_dma_free(dev->parent, rqd->meta_list, rqd->dma_meta_list);
- pblk_free_rqd(pblk, rqd, WRITE);
+ pblk_free_rqd(pblk, rqd, PBLK_WRITE_INT);
atomic_dec(&pblk->inflight_io);
kref_put(&pad_rq->ref, pblk_recov_complete);
@@ -404,25 +383,21 @@ next_pad_rq:
ppa_list = (void *)(meta_list) + pblk_dma_meta_size;
dma_ppa_list = dma_meta_list + pblk_dma_meta_size;
- rqd = pblk_alloc_rqd(pblk, WRITE);
- if (IS_ERR(rqd)) {
- ret = PTR_ERR(rqd);
- goto fail_free_meta;
- }
-
bio = pblk_bio_map_addr(pblk, data, rq_ppas, rq_len,
PBLK_VMALLOC_META, GFP_KERNEL);
if (IS_ERR(bio)) {
ret = PTR_ERR(bio);
- goto fail_free_rqd;
+ goto fail_free_meta;
}
bio->bi_iter.bi_sector = 0; /* internal bio */
bio_set_op_attrs(bio, REQ_OP_WRITE, 0);
+ rqd = pblk_alloc_rqd(pblk, PBLK_WRITE_INT);
+
rqd->bio = bio;
rqd->opcode = NVM_OP_PWRITE;
- rqd->flags = pblk_set_progr_mode(pblk, WRITE);
+ rqd->flags = pblk_set_progr_mode(pblk, PBLK_WRITE);
rqd->meta_list = meta_list;
rqd->nr_ppas = rq_ppas;
rqd->ppa_list = ppa_list;
@@ -490,8 +465,6 @@ free_rq:
fail_free_bio:
bio_put(bio);
-fail_free_rqd:
- pblk_free_rqd(pblk, rqd, WRITE);
fail_free_meta:
nvm_dev_dma_free(dev->parent, meta_list, dma_meta_list);
fail_free_pad:
@@ -522,7 +495,6 @@ static int pblk_recov_scan_all_oob(struct pblk *pblk, struct pblk_line *line,
int ret = 0;
int rec_round;
int left_ppas = pblk_calc_sec_in_line(pblk, line) - line->cur_sec;
- DECLARE_COMPLETION_ONSTACK(wait);
ppa_list = p.ppa_list;
meta_list = p.meta_list;
@@ -557,8 +529,6 @@ next_rq:
rqd->ppa_list = ppa_list;
rqd->dma_ppa_list = dma_ppa_list;
rqd->dma_meta_list = dma_meta_list;
- rqd->end_io = pblk_end_io_sync;
- rqd->private = &wait;
if (pblk_io_aligned(pblk, rq_ppas))
rqd->flags = pblk_set_read_mode(pblk, PBLK_READ_SEQUENTIAL);
@@ -584,18 +554,13 @@ next_rq:
addr_to_gen_ppa(pblk, w_ptr, line->id);
}
- ret = pblk_submit_io(pblk, rqd);
+ ret = pblk_submit_io_sync(pblk, rqd);
if (ret) {
pr_err("pblk: I/O submission failed: %d\n", ret);
return ret;
}
- if (!wait_for_completion_io_timeout(&wait,
- msecs_to_jiffies(PBLK_COMMAND_TIMEOUT_MS))) {
- pr_err("pblk: L2P recovery read timed out\n");
- }
atomic_dec(&pblk->inflight_io);
- reinit_completion(&wait);
/* This should not happen since the read failed during normal recovery,
* but the media works funny sometimes...
@@ -663,7 +628,6 @@ static int pblk_recov_scan_oob(struct pblk *pblk, struct pblk_line *line,
int i, j;
int ret = 0;
int left_ppas = pblk_calc_sec_in_line(pblk, line);
- DECLARE_COMPLETION_ONSTACK(wait);
ppa_list = p.ppa_list;
meta_list = p.meta_list;
@@ -696,8 +660,6 @@ next_rq:
rqd->ppa_list = ppa_list;
rqd->dma_ppa_list = dma_ppa_list;
rqd->dma_meta_list = dma_meta_list;
- rqd->end_io = pblk_end_io_sync;
- rqd->private = &wait;
if (pblk_io_aligned(pblk, rq_ppas))
rqd->flags = pblk_set_read_mode(pblk, PBLK_READ_SEQUENTIAL);
@@ -723,19 +685,14 @@ next_rq:
addr_to_gen_ppa(pblk, paddr, line->id);
}
- ret = pblk_submit_io(pblk, rqd);
+ ret = pblk_submit_io_sync(pblk, rqd);
if (ret) {
pr_err("pblk: I/O submission failed: %d\n", ret);
bio_put(bio);
return ret;
}
- if (!wait_for_completion_io_timeout(&wait,
- msecs_to_jiffies(PBLK_COMMAND_TIMEOUT_MS))) {
- pr_err("pblk: L2P recovery read timed out\n");
- }
atomic_dec(&pblk->inflight_io);
- reinit_completion(&wait);
/* Reached the end of the written line */
if (rqd->error) {
@@ -785,15 +742,9 @@ static int pblk_recov_l2p_from_oob(struct pblk *pblk, struct pblk_line *line)
dma_addr_t dma_ppa_list, dma_meta_list;
int done, ret = 0;
- rqd = pblk_alloc_rqd(pblk, READ);
- if (IS_ERR(rqd))
- return PTR_ERR(rqd);
-
meta_list = nvm_dev_dma_alloc(dev->parent, GFP_KERNEL, &dma_meta_list);
- if (!meta_list) {
- ret = -ENOMEM;
- goto free_rqd;
- }
+ if (!meta_list)
+ return -ENOMEM;
ppa_list = (void *)(meta_list) + pblk_dma_meta_size;
dma_ppa_list = dma_meta_list + pblk_dma_meta_size;
@@ -804,6 +755,8 @@ static int pblk_recov_l2p_from_oob(struct pblk *pblk, struct pblk_line *line)
goto free_meta_list;
}
+ rqd = pblk_alloc_rqd(pblk, PBLK_READ);
+
p.ppa_list = ppa_list;
p.meta_list = meta_list;
p.rqd = rqd;
@@ -832,8 +785,6 @@ out:
kfree(data);
free_meta_list:
nvm_dev_dma_free(dev->parent, meta_list, dma_meta_list);
-free_rqd:
- pblk_free_rqd(pblk, rqd, READ);
return ret;
}
@@ -851,11 +802,33 @@ static void pblk_recov_line_add_ordered(struct list_head *head,
__list_add(&line->list, t->list.prev, &t->list);
}
-struct pblk_line *pblk_recov_l2p(struct pblk *pblk)
+static u64 pblk_line_emeta_start(struct pblk *pblk, struct pblk_line *line)
{
struct nvm_tgt_dev *dev = pblk->dev;
struct nvm_geo *geo = &dev->geo;
struct pblk_line_meta *lm = &pblk->lm;
+ unsigned int emeta_secs;
+ u64 emeta_start;
+ struct ppa_addr ppa;
+ int pos;
+
+ emeta_secs = lm->emeta_sec[0];
+ emeta_start = lm->sec_per_line;
+
+ while (emeta_secs) {
+ emeta_start--;
+ ppa = addr_to_pblk_ppa(pblk, emeta_start, line->id);
+ pos = pblk_ppa_to_pos(geo, ppa);
+ if (!test_bit(pos, line->blk_bitmap))
+ emeta_secs--;
+ }
+
+ return emeta_start;
+}
+
+struct pblk_line *pblk_recov_l2p(struct pblk *pblk)
+{
+ struct pblk_line_meta *lm = &pblk->lm;
struct pblk_line_mgmt *l_mg = &pblk->l_mg;
struct pblk_line *line, *tline, *data_line = NULL;
struct pblk_smeta *smeta;
@@ -900,9 +873,9 @@ struct pblk_line *pblk_recov_l2p(struct pblk *pblk)
if (le32_to_cpu(smeta_buf->header.identifier) != PBLK_MAGIC)
continue;
- if (le16_to_cpu(smeta_buf->header.version) != 1) {
+ if (smeta_buf->header.version != SMETA_VERSION) {
pr_err("pblk: found incompatible line version %u\n",
- smeta_buf->header.version);
+ le16_to_cpu(smeta_buf->header.version));
return ERR_PTR(-EINVAL);
}
@@ -954,15 +927,9 @@ struct pblk_line *pblk_recov_l2p(struct pblk *pblk)
/* Verify closed blocks and recover this portion of L2P table*/
list_for_each_entry_safe(line, tline, &recov_list, list) {
- int off, nr_bb;
-
recovered_lines++;
- /* Calculate where emeta starts based on the line bb */
- off = lm->sec_per_line - lm->emeta_sec[0];
- nr_bb = bitmap_weight(line->blk_bitmap, lm->blk_per_line);
- off -= nr_bb * geo->sec_per_pl;
- line->emeta_ssec = off;
+ line->emeta_ssec = pblk_line_emeta_start(pblk, line);
line->emeta = emeta;
memset(line->emeta->buf, 0, lm->emeta_len[0]);
@@ -987,7 +954,7 @@ next:
list_move_tail(&line->list, move_list);
spin_unlock(&l_mg->gc_lock);
- mempool_free(line->map_bitmap, pblk->line_meta_pool);
+ kfree(line->map_bitmap);
line->map_bitmap = NULL;
line->smeta = NULL;
line->emeta = NULL;
diff --git a/drivers/lightnvm/pblk-rl.c b/drivers/lightnvm/pblk-rl.c
index 2e6a5361baf0..abae31fd434e 100644
--- a/drivers/lightnvm/pblk-rl.c
+++ b/drivers/lightnvm/pblk-rl.c
@@ -96,9 +96,11 @@ unsigned long pblk_rl_nr_free_blks(struct pblk_rl *rl)
*
* Only the total number of free blocks is used to configure the rate limiter.
*/
-static int pblk_rl_update_rates(struct pblk_rl *rl, unsigned long max)
+void pblk_rl_update_rates(struct pblk_rl *rl)
{
+ struct pblk *pblk = container_of(rl, struct pblk, rl);
unsigned long free_blocks = pblk_rl_nr_free_blks(rl);
+ int max = rl->rb_budget;
if (free_blocks >= rl->high) {
rl->rb_user_max = max;
@@ -124,23 +126,18 @@ static int pblk_rl_update_rates(struct pblk_rl *rl, unsigned long max)
rl->rb_state = PBLK_RL_LOW;
}
- return rl->rb_state;
+ if (rl->rb_state == (PBLK_RL_MID | PBLK_RL_LOW))
+ pblk_gc_should_start(pblk);
+ else
+ pblk_gc_should_stop(pblk);
}
void pblk_rl_free_lines_inc(struct pblk_rl *rl, struct pblk_line *line)
{
- struct pblk *pblk = container_of(rl, struct pblk, rl);
int blk_in_line = atomic_read(&line->blk_in_line);
- int ret;
atomic_add(blk_in_line, &rl->free_blocks);
- /* Rates will not change that often - no need to lock update */
- ret = pblk_rl_update_rates(rl, rl->rb_budget);
-
- if (ret == (PBLK_RL_MID | PBLK_RL_LOW))
- pblk_gc_should_start(pblk);
- else
- pblk_gc_should_stop(pblk);
+ pblk_rl_update_rates(rl);
}
void pblk_rl_free_lines_dec(struct pblk_rl *rl, struct pblk_line *line)
@@ -148,19 +145,7 @@ void pblk_rl_free_lines_dec(struct pblk_rl *rl, struct pblk_line *line)
int blk_in_line = atomic_read(&line->blk_in_line);
atomic_sub(blk_in_line, &rl->free_blocks);
-}
-
-void pblk_gc_should_kick(struct pblk *pblk)
-{
- struct pblk_rl *rl = &pblk->rl;
- int ret;
-
- /* Rates will not change that often - no need to lock update */
- ret = pblk_rl_update_rates(rl, rl->rb_budget);
- if (ret == (PBLK_RL_MID | PBLK_RL_LOW))
- pblk_gc_should_start(pblk);
- else
- pblk_gc_should_stop(pblk);
+ pblk_rl_update_rates(rl);
}
int pblk_rl_high_thrs(struct pblk_rl *rl)
@@ -168,14 +153,9 @@ int pblk_rl_high_thrs(struct pblk_rl *rl)
return rl->high;
}
-int pblk_rl_low_thrs(struct pblk_rl *rl)
-{
- return rl->low;
-}
-
-int pblk_rl_sysfs_rate_show(struct pblk_rl *rl)
+int pblk_rl_max_io(struct pblk_rl *rl)
{
- return rl->rb_user_max;
+ return rl->rb_max_io;
}
static void pblk_rl_u_timer(unsigned long data)
@@ -214,6 +194,7 @@ void pblk_rl_init(struct pblk_rl *rl, int budget)
/* To start with, all buffer is available to user I/O writers */
rl->rb_budget = budget;
rl->rb_user_max = budget;
+ rl->rb_max_io = budget >> 1;
rl->rb_gc_max = 0;
rl->rb_state = PBLK_RL_HIGH;
diff --git a/drivers/lightnvm/pblk-sysfs.c b/drivers/lightnvm/pblk-sysfs.c
index 95fb434e2f01..cd49e8875d4e 100644
--- a/drivers/lightnvm/pblk-sysfs.c
+++ b/drivers/lightnvm/pblk-sysfs.c
@@ -253,7 +253,7 @@ static ssize_t pblk_sysfs_lines(struct pblk *pblk, char *page)
sz += snprintf(page + sz, PAGE_SIZE - sz,
"GC: full:%d, high:%d, mid:%d, low:%d, empty:%d, queue:%d\n",
gc_full, gc_high, gc_mid, gc_low, gc_empty,
- atomic_read(&pblk->gc.inflight_gc));
+ atomic_read(&pblk->gc.read_inflight_gc));
sz += snprintf(page + sz, PAGE_SIZE - sz,
"data (%d) cur:%d, left:%d, vsc:%d, s:%d, map:%d/%d (%d)\n",
diff --git a/drivers/lightnvm/pblk-write.c b/drivers/lightnvm/pblk-write.c
index 3ad9e56d2473..6c1cafafef53 100644
--- a/drivers/lightnvm/pblk-write.c
+++ b/drivers/lightnvm/pblk-write.c
@@ -20,7 +20,6 @@
static unsigned long pblk_end_w_bio(struct pblk *pblk, struct nvm_rq *rqd,
struct pblk_c_ctx *c_ctx)
{
- struct nvm_tgt_dev *dev = pblk->dev;
struct bio *original_bio;
unsigned long ret;
int i;
@@ -33,16 +32,18 @@ static unsigned long pblk_end_w_bio(struct pblk *pblk, struct nvm_rq *rqd,
bio_endio(original_bio);
}
+ if (c_ctx->nr_padded)
+ pblk_bio_free_pages(pblk, rqd->bio, c_ctx->nr_valid,
+ c_ctx->nr_padded);
+
#ifdef CONFIG_NVM_DEBUG
- atomic_long_add(c_ctx->nr_valid, &pblk->sync_writes);
+ atomic_long_add(rqd->nr_ppas, &pblk->sync_writes);
#endif
ret = pblk_rb_sync_advance(&pblk->rwb, c_ctx->nr_valid);
- nvm_dev_dma_free(dev->parent, rqd->meta_list, rqd->dma_meta_list);
-
bio_put(rqd->bio);
- pblk_free_rqd(pblk, rqd, WRITE);
+ pblk_free_rqd(pblk, rqd, PBLK_WRITE);
return ret;
}
@@ -107,10 +108,7 @@ static void pblk_end_w_fail(struct pblk *pblk, struct nvm_rq *rqd)
ppa_list = &rqd->ppa_addr;
recovery = mempool_alloc(pblk->rec_pool, GFP_ATOMIC);
- if (!recovery) {
- pr_err("pblk: could not allocate recovery context\n");
- return;
- }
+
INIT_LIST_HEAD(&recovery->failed);
bit = -1;
@@ -175,7 +173,6 @@ static void pblk_end_io_write(struct nvm_rq *rqd)
static void pblk_end_io_write_meta(struct nvm_rq *rqd)
{
struct pblk *pblk = rqd->private;
- struct nvm_tgt_dev *dev = pblk->dev;
struct pblk_g_ctx *m_ctx = nvm_rq_to_pdu(rqd);
struct pblk_line *line = m_ctx->private;
struct pblk_emeta *emeta = line->emeta;
@@ -187,19 +184,13 @@ static void pblk_end_io_write_meta(struct nvm_rq *rqd)
pblk_log_write_err(pblk, rqd);
pr_err("pblk: metadata I/O failed. Line %d\n", line->id);
}
-#ifdef CONFIG_NVM_DEBUG
- else
- WARN_ONCE(rqd->bio->bi_status, "pblk: corrupted write error\n");
-#endif
sync = atomic_add_return(rqd->nr_ppas, &emeta->sync);
if (sync == emeta->nr_entries)
- pblk_line_run_ws(pblk, line, NULL, pblk_line_close_ws,
- pblk->close_wq);
+ pblk_gen_run_ws(pblk, line, NULL, pblk_line_close_ws,
+ GFP_ATOMIC, pblk->close_wq);
- bio_put(rqd->bio);
- nvm_dev_dma_free(dev->parent, rqd->meta_list, rqd->dma_meta_list);
- pblk_free_rqd(pblk, rqd, READ);
+ pblk_free_rqd(pblk, rqd, PBLK_WRITE_INT);
atomic_dec(&pblk->inflight_io);
}
@@ -213,7 +204,7 @@ static int pblk_alloc_w_rq(struct pblk *pblk, struct nvm_rq *rqd,
/* Setup write request */
rqd->opcode = NVM_OP_PWRITE;
rqd->nr_ppas = nr_secs;
- rqd->flags = pblk_set_progr_mode(pblk, WRITE);
+ rqd->flags = pblk_set_progr_mode(pblk, PBLK_WRITE);
rqd->private = pblk;
rqd->end_io = end_io;
@@ -229,15 +220,16 @@ static int pblk_alloc_w_rq(struct pblk *pblk, struct nvm_rq *rqd,
}
static int pblk_setup_w_rq(struct pblk *pblk, struct nvm_rq *rqd,
- struct pblk_c_ctx *c_ctx, struct ppa_addr *erase_ppa)
+ struct ppa_addr *erase_ppa)
{
struct pblk_line_meta *lm = &pblk->lm;
struct pblk_line *e_line = pblk_line_get_erase(pblk);
+ struct pblk_c_ctx *c_ctx = nvm_rq_to_pdu(rqd);
unsigned int valid = c_ctx->nr_valid;
unsigned int padded = c_ctx->nr_padded;
unsigned int nr_secs = valid + padded;
unsigned long *lun_bitmap;
- int ret = 0;
+ int ret;
lun_bitmap = kzalloc(lm->lun_bitmap_len, GFP_KERNEL);
if (!lun_bitmap)
@@ -279,7 +271,7 @@ int pblk_setup_w_rec_rq(struct pblk *pblk, struct nvm_rq *rqd,
pblk_map_rq(pblk, rqd, c_ctx->sentry, lun_bitmap, c_ctx->nr_valid, 0);
rqd->ppa_status = (u64)0;
- rqd->flags = pblk_set_progr_mode(pblk, WRITE);
+ rqd->flags = pblk_set_progr_mode(pblk, PBLK_WRITE);
return ret;
}
@@ -303,55 +295,6 @@ static int pblk_calc_secs_to_sync(struct pblk *pblk, unsigned int secs_avail,
return secs_to_sync;
}
-static inline int pblk_valid_meta_ppa(struct pblk *pblk,
- struct pblk_line *meta_line,
- struct ppa_addr *ppa_list, int nr_ppas)
-{
- struct nvm_tgt_dev *dev = pblk->dev;
- struct nvm_geo *geo = &dev->geo;
- struct pblk_line *data_line;
- struct ppa_addr ppa, ppa_opt;
- u64 paddr;
- int i;
-
- data_line = &pblk->lines[pblk_dev_ppa_to_line(ppa_list[0])];
- paddr = pblk_lookup_page(pblk, meta_line);
- ppa = addr_to_gen_ppa(pblk, paddr, 0);
-
- if (test_bit(pblk_ppa_to_pos(geo, ppa), data_line->blk_bitmap))
- return 1;
-
- /* Schedule a metadata I/O that is half the distance from the data I/O
- * with regards to the number of LUNs forming the pblk instance. This
- * balances LUN conflicts across every I/O.
- *
- * When the LUN configuration changes (e.g., due to GC), this distance
- * can align, which would result on a LUN deadlock. In this case, modify
- * the distance to not be optimal, but allow metadata I/Os to succeed.
- */
- ppa_opt = addr_to_gen_ppa(pblk, paddr + data_line->meta_distance, 0);
- if (unlikely(ppa_opt.ppa == ppa.ppa)) {
- data_line->meta_distance--;
- return 0;
- }
-
- for (i = 0; i < nr_ppas; i += pblk->min_write_pgs)
- if (ppa_list[i].g.ch == ppa_opt.g.ch &&
- ppa_list[i].g.lun == ppa_opt.g.lun)
- return 1;
-
- if (test_bit(pblk_ppa_to_pos(geo, ppa_opt), data_line->blk_bitmap)) {
- for (i = 0; i < nr_ppas; i += pblk->min_write_pgs)
- if (ppa_list[i].g.ch == ppa.g.ch &&
- ppa_list[i].g.lun == ppa.g.lun)
- return 0;
-
- return 1;
- }
-
- return 0;
-}
-
int pblk_submit_meta_io(struct pblk *pblk, struct pblk_line *meta_line)
{
struct nvm_tgt_dev *dev = pblk->dev;
@@ -370,11 +313,8 @@ int pblk_submit_meta_io(struct pblk *pblk, struct pblk_line *meta_line)
int i, j;
int ret;
- rqd = pblk_alloc_rqd(pblk, READ);
- if (IS_ERR(rqd)) {
- pr_err("pblk: cannot allocate write req.\n");
- return PTR_ERR(rqd);
- }
+ rqd = pblk_alloc_rqd(pblk, PBLK_WRITE_INT);
+
m_ctx = nvm_rq_to_pdu(rqd);
m_ctx->private = meta_line;
@@ -407,8 +347,6 @@ int pblk_submit_meta_io(struct pblk *pblk, struct pblk_line *meta_line)
if (emeta->mem >= lm->emeta_len[0]) {
spin_lock(&l_mg->close_lock);
list_del(&meta_line->list);
- WARN(!bitmap_full(meta_line->map_bitmap, lm->sec_per_line),
- "pblk: corrupt meta line %d\n", meta_line->id);
spin_unlock(&l_mg->close_lock);
}
@@ -428,18 +366,51 @@ fail_rollback:
pblk_dealloc_page(pblk, meta_line, rq_ppas);
list_add(&meta_line->list, &meta_line->list);
spin_unlock(&l_mg->close_lock);
-
- nvm_dev_dma_free(dev->parent, rqd->meta_list, rqd->dma_meta_list);
fail_free_bio:
- if (likely(l_mg->emeta_alloc_type == PBLK_VMALLOC_META))
- bio_put(bio);
+ bio_put(bio);
fail_free_rqd:
- pblk_free_rqd(pblk, rqd, READ);
+ pblk_free_rqd(pblk, rqd, PBLK_WRITE_INT);
return ret;
}
-static int pblk_sched_meta_io(struct pblk *pblk, struct ppa_addr *prev_list,
- int prev_n)
+static inline bool pblk_valid_meta_ppa(struct pblk *pblk,
+ struct pblk_line *meta_line,
+ struct nvm_rq *data_rqd)
+{
+ struct nvm_tgt_dev *dev = pblk->dev;
+ struct nvm_geo *geo = &dev->geo;
+ struct pblk_c_ctx *data_c_ctx = nvm_rq_to_pdu(data_rqd);
+ struct pblk_line *data_line = pblk_line_get_data(pblk);
+ struct ppa_addr ppa, ppa_opt;
+ u64 paddr;
+ int pos_opt;
+
+ /* Schedule a metadata I/O that is half the distance from the data I/O
+ * with regards to the number of LUNs forming the pblk instance. This
+ * balances LUN conflicts across every I/O.
+ *
+ * When the LUN configuration changes (e.g., due to GC), this distance
+ * can align, which would result on metadata and data I/Os colliding. In
+ * this case, modify the distance to not be optimal, but move the
+ * optimal in the right direction.
+ */
+ paddr = pblk_lookup_page(pblk, meta_line);
+ ppa = addr_to_gen_ppa(pblk, paddr, 0);
+ ppa_opt = addr_to_gen_ppa(pblk, paddr + data_line->meta_distance, 0);
+ pos_opt = pblk_ppa_to_pos(geo, ppa_opt);
+
+ if (test_bit(pos_opt, data_c_ctx->lun_bitmap) ||
+ test_bit(pos_opt, data_line->blk_bitmap))
+ return true;
+
+ if (unlikely(pblk_ppa_comp(ppa_opt, ppa)))
+ data_line->meta_distance--;
+
+ return false;
+}
+
+static struct pblk_line *pblk_should_submit_meta_io(struct pblk *pblk,
+ struct nvm_rq *data_rqd)
{
struct pblk_line_meta *lm = &pblk->lm;
struct pblk_line_mgmt *l_mg = &pblk->l_mg;
@@ -449,57 +420,45 @@ static int pblk_sched_meta_io(struct pblk *pblk, struct ppa_addr *prev_list,
retry:
if (list_empty(&l_mg->emeta_list)) {
spin_unlock(&l_mg->close_lock);
- return 0;
+ return NULL;
}
meta_line = list_first_entry(&l_mg->emeta_list, struct pblk_line, list);
- if (bitmap_full(meta_line->map_bitmap, lm->sec_per_line))
+ if (meta_line->emeta->mem >= lm->emeta_len[0])
goto retry;
spin_unlock(&l_mg->close_lock);
- if (!pblk_valid_meta_ppa(pblk, meta_line, prev_list, prev_n))
- return 0;
+ if (!pblk_valid_meta_ppa(pblk, meta_line, data_rqd))
+ return NULL;
- return pblk_submit_meta_io(pblk, meta_line);
+ return meta_line;
}
static int pblk_submit_io_set(struct pblk *pblk, struct nvm_rq *rqd)
{
- struct pblk_c_ctx *c_ctx = nvm_rq_to_pdu(rqd);
struct ppa_addr erase_ppa;
+ struct pblk_line *meta_line;
int err;
ppa_set_empty(&erase_ppa);
/* Assign lbas to ppas and populate request structure */
- err = pblk_setup_w_rq(pblk, rqd, c_ctx, &erase_ppa);
+ err = pblk_setup_w_rq(pblk, rqd, &erase_ppa);
if (err) {
pr_err("pblk: could not setup write request: %d\n", err);
return NVM_IO_ERR;
}
- if (likely(ppa_empty(erase_ppa))) {
- /* Submit metadata write for previous data line */
- err = pblk_sched_meta_io(pblk, rqd->ppa_list, rqd->nr_ppas);
- if (err) {
- pr_err("pblk: metadata I/O submission failed: %d", err);
- return NVM_IO_ERR;
- }
+ meta_line = pblk_should_submit_meta_io(pblk, rqd);
- /* Submit data write for current data line */
- err = pblk_submit_io(pblk, rqd);
- if (err) {
- pr_err("pblk: data I/O submission failed: %d\n", err);
- return NVM_IO_ERR;
- }
- } else {
- /* Submit data write for current data line */
- err = pblk_submit_io(pblk, rqd);
- if (err) {
- pr_err("pblk: data I/O submission failed: %d\n", err);
- return NVM_IO_ERR;
- }
+ /* Submit data write for current data line */
+ err = pblk_submit_io(pblk, rqd);
+ if (err) {
+ pr_err("pblk: data I/O submission failed: %d\n", err);
+ return NVM_IO_ERR;
+ }
- /* Submit available erase for next data line */
+ if (!ppa_empty(erase_ppa)) {
+ /* Submit erase for next data line */
if (pblk_blk_erase_async(pblk, erase_ppa)) {
struct pblk_line *e_line = pblk_line_get_erase(pblk);
struct nvm_tgt_dev *dev = pblk->dev;
@@ -512,6 +471,15 @@ static int pblk_submit_io_set(struct pblk *pblk, struct nvm_rq *rqd)
}
}
+ if (meta_line) {
+ /* Submit metadata write for previous data line */
+ err = pblk_submit_meta_io(pblk, meta_line);
+ if (err) {
+ pr_err("pblk: metadata I/O submission failed: %d", err);
+ return NVM_IO_ERR;
+ }
+ }
+
return NVM_IO_OK;
}
@@ -521,7 +489,8 @@ static void pblk_free_write_rqd(struct pblk *pblk, struct nvm_rq *rqd)
struct bio *bio = rqd->bio;
if (c_ctx->nr_padded)
- pblk_bio_free_pages(pblk, bio, rqd->nr_ppas, c_ctx->nr_padded);
+ pblk_bio_free_pages(pblk, bio, c_ctx->nr_valid,
+ c_ctx->nr_padded);
}
static int pblk_submit_write(struct pblk *pblk)
@@ -543,31 +512,24 @@ static int pblk_submit_write(struct pblk *pblk)
if (!secs_to_flush && secs_avail < pblk->min_write_pgs)
return 1;
- rqd = pblk_alloc_rqd(pblk, WRITE);
- if (IS_ERR(rqd)) {
- pr_err("pblk: cannot allocate write req.\n");
- return 1;
- }
-
- bio = bio_alloc(GFP_KERNEL, pblk->max_write_pgs);
- if (!bio) {
- pr_err("pblk: cannot allocate write bio\n");
- goto fail_free_rqd;
- }
- bio->bi_iter.bi_sector = 0; /* internal bio */
- bio_set_op_attrs(bio, REQ_OP_WRITE, 0);
- rqd->bio = bio;
-
secs_to_sync = pblk_calc_secs_to_sync(pblk, secs_avail, secs_to_flush);
if (secs_to_sync > pblk->max_write_pgs) {
pr_err("pblk: bad buffer sync calculation\n");
- goto fail_put_bio;
+ return 1;
}
secs_to_com = (secs_to_sync > secs_avail) ? secs_avail : secs_to_sync;
pos = pblk_rb_read_commit(&pblk->rwb, secs_to_com);
- if (pblk_rb_read_to_bio(&pblk->rwb, rqd, bio, pos, secs_to_sync,
+ bio = bio_alloc(GFP_KERNEL, secs_to_sync);
+
+ bio->bi_iter.bi_sector = 0; /* internal bio */
+ bio_set_op_attrs(bio, REQ_OP_WRITE, 0);
+
+ rqd = pblk_alloc_rqd(pblk, PBLK_WRITE);
+ rqd->bio = bio;
+
+ if (pblk_rb_read_to_bio(&pblk->rwb, rqd, pos, secs_to_sync,
secs_avail)) {
pr_err("pblk: corrupted write bio\n");
goto fail_put_bio;
@@ -586,8 +548,7 @@ fail_free_bio:
pblk_free_write_rqd(pblk, rqd);
fail_put_bio:
bio_put(bio);
-fail_free_rqd:
- pblk_free_rqd(pblk, rqd, WRITE);
+ pblk_free_rqd(pblk, rqd, PBLK_WRITE);
return 1;
}
diff --git a/drivers/lightnvm/pblk.h b/drivers/lightnvm/pblk.h
index 67e623bd5c2d..90961033a79f 100644
--- a/drivers/lightnvm/pblk.h
+++ b/drivers/lightnvm/pblk.h
@@ -40,10 +40,6 @@
#define PBLK_MAX_REQ_ADDRS (64)
#define PBLK_MAX_REQ_ADDRS_PW (6)
-#define PBLK_WS_POOL_SIZE (128)
-#define PBLK_META_POOL_SIZE (128)
-#define PBLK_READ_REQ_POOL_SIZE (1024)
-
#define PBLK_NR_CLOSE_JOBS (4)
#define PBLK_CACHE_NAME_LEN (DISK_NAME_LEN + 16)
@@ -59,7 +55,15 @@
for ((i) = 0, rlun = &(pblk)->luns[0]; \
(i) < (pblk)->nr_luns; (i)++, rlun = &(pblk)->luns[(i)])
-#define ERASE 2 /* READ = 0, WRITE = 1 */
+/* Static pool sizes */
+#define PBLK_GEN_WS_POOL_SIZE (2)
+
+enum {
+ PBLK_READ = READ,
+ PBLK_WRITE = WRITE,/* Write from write buffer */
+ PBLK_WRITE_INT, /* Internal write - no write buffer */
+ PBLK_ERASE,
+};
enum {
/* IO Types */
@@ -95,6 +99,7 @@ enum {
};
#define pblk_dma_meta_size (sizeof(struct pblk_sec_meta) * PBLK_MAX_REQ_ADDRS)
+#define pblk_dma_ppa_size (sizeof(u64) * PBLK_MAX_REQ_ADDRS)
/* write buffer completion context */
struct pblk_c_ctx {
@@ -106,9 +111,10 @@ struct pblk_c_ctx {
unsigned int nr_padded;
};
-/* generic context */
+/* read context */
struct pblk_g_ctx {
void *private;
+ u64 lba;
};
/* Pad context */
@@ -207,6 +213,7 @@ struct pblk_lun {
struct pblk_gc_rq {
struct pblk_line *line;
void *data;
+ u64 paddr_list[PBLK_MAX_REQ_ADDRS];
u64 lba_list[PBLK_MAX_REQ_ADDRS];
int nr_secs;
int secs_to_gc;
@@ -231,7 +238,10 @@ struct pblk_gc {
struct timer_list gc_timer;
struct semaphore gc_sem;
- atomic_t inflight_gc;
+ atomic_t read_inflight_gc; /* Number of lines with inflight GC reads */
+ atomic_t pipeline_gc; /* Number of lines in the GC pipeline -
+ * started reads to finished writes
+ */
int w_entries;
struct list_head w_list;
@@ -267,6 +277,7 @@ struct pblk_rl {
int rb_gc_max; /* Max buffer entries available for GC I/O */
int rb_gc_rsv; /* Reserved buffer entries for GC I/O */
int rb_state; /* Rate-limiter current state */
+ int rb_max_io; /* Maximum size for an I/O giving the config */
atomic_t rb_user_cnt; /* User I/O buffer counter */
atomic_t rb_gc_cnt; /* GC I/O buffer counter */
@@ -310,6 +321,7 @@ enum {
};
#define PBLK_MAGIC 0x70626c6b /*pblk*/
+#define SMETA_VERSION cpu_to_le16(1)
struct line_header {
__le32 crc;
@@ -618,15 +630,16 @@ struct pblk {
struct list_head compl_list;
- mempool_t *page_pool;
- mempool_t *line_ws_pool;
+ mempool_t *page_bio_pool;
+ mempool_t *gen_ws_pool;
mempool_t *rec_pool;
- mempool_t *g_rq_pool;
+ mempool_t *r_rq_pool;
mempool_t *w_rq_pool;
- mempool_t *line_meta_pool;
+ mempool_t *e_rq_pool;
struct workqueue_struct *close_wq;
struct workqueue_struct *bb_wq;
+ struct workqueue_struct *r_end_wq;
struct timer_list wtimer;
@@ -657,15 +670,15 @@ int pblk_rb_may_write_gc(struct pblk_rb *rb, unsigned int nr_entries,
void pblk_rb_write_entry_user(struct pblk_rb *rb, void *data,
struct pblk_w_ctx w_ctx, unsigned int pos);
void pblk_rb_write_entry_gc(struct pblk_rb *rb, void *data,
- struct pblk_w_ctx w_ctx, struct pblk_line *gc_line,
- unsigned int pos);
+ struct pblk_w_ctx w_ctx, struct pblk_line *line,
+ u64 paddr, unsigned int pos);
struct pblk_w_ctx *pblk_rb_w_ctx(struct pblk_rb *rb, unsigned int pos);
void pblk_rb_flush(struct pblk_rb *rb);
void pblk_rb_sync_l2p(struct pblk_rb *rb);
unsigned int pblk_rb_read_to_bio(struct pblk_rb *rb, struct nvm_rq *rqd,
- struct bio *bio, unsigned int pos,
- unsigned int nr_entries, unsigned int count);
+ unsigned int pos, unsigned int nr_entries,
+ unsigned int count);
unsigned int pblk_rb_read_to_bio_list(struct pblk_rb *rb, struct bio *bio,
struct list_head *list,
unsigned int max);
@@ -692,24 +705,23 @@ ssize_t pblk_rb_sysfs(struct pblk_rb *rb, char *buf);
/*
* pblk core
*/
-struct nvm_rq *pblk_alloc_rqd(struct pblk *pblk, int rw);
+struct nvm_rq *pblk_alloc_rqd(struct pblk *pblk, int type);
+void pblk_free_rqd(struct pblk *pblk, struct nvm_rq *rqd, int type);
void pblk_set_sec_per_write(struct pblk *pblk, int sec_per_write);
int pblk_setup_w_rec_rq(struct pblk *pblk, struct nvm_rq *rqd,
struct pblk_c_ctx *c_ctx);
-void pblk_free_rqd(struct pblk *pblk, struct nvm_rq *rqd, int rw);
-void pblk_wait_for_meta(struct pblk *pblk);
-struct ppa_addr pblk_get_lba_map(struct pblk *pblk, sector_t lba);
void pblk_discard(struct pblk *pblk, struct bio *bio);
void pblk_log_write_err(struct pblk *pblk, struct nvm_rq *rqd);
void pblk_log_read_err(struct pblk *pblk, struct nvm_rq *rqd);
int pblk_submit_io(struct pblk *pblk, struct nvm_rq *rqd);
+int pblk_submit_io_sync(struct pblk *pblk, struct nvm_rq *rqd);
int pblk_submit_meta_io(struct pblk *pblk, struct pblk_line *meta_line);
struct bio *pblk_bio_map_addr(struct pblk *pblk, void *data,
unsigned int nr_secs, unsigned int len,
int alloc_type, gfp_t gfp_mask);
struct pblk_line *pblk_line_get(struct pblk *pblk);
struct pblk_line *pblk_line_get_first_data(struct pblk *pblk);
-void pblk_line_replace_data(struct pblk *pblk);
+struct pblk_line *pblk_line_replace_data(struct pblk *pblk);
int pblk_line_recov_alloc(struct pblk *pblk, struct pblk_line *line);
void pblk_line_recov_close(struct pblk *pblk, struct pblk_line *line);
struct pblk_line *pblk_line_get_data(struct pblk *pblk);
@@ -719,19 +731,18 @@ int pblk_line_is_full(struct pblk_line *line);
void pblk_line_free(struct pblk *pblk, struct pblk_line *line);
void pblk_line_close_meta(struct pblk *pblk, struct pblk_line *line);
void pblk_line_close(struct pblk *pblk, struct pblk_line *line);
-void pblk_line_close_meta_sync(struct pblk *pblk);
void pblk_line_close_ws(struct work_struct *work);
void pblk_pipeline_stop(struct pblk *pblk);
-void pblk_line_mark_bb(struct work_struct *work);
-void pblk_line_run_ws(struct pblk *pblk, struct pblk_line *line, void *priv,
- void (*work)(struct work_struct *),
- struct workqueue_struct *wq);
+void pblk_gen_run_ws(struct pblk *pblk, struct pblk_line *line, void *priv,
+ void (*work)(struct work_struct *), gfp_t gfp_mask,
+ struct workqueue_struct *wq);
u64 pblk_line_smeta_start(struct pblk *pblk, struct pblk_line *line);
int pblk_line_read_smeta(struct pblk *pblk, struct pblk_line *line);
int pblk_line_read_emeta(struct pblk *pblk, struct pblk_line *line,
void *emeta_buf);
int pblk_blk_erase_async(struct pblk *pblk, struct ppa_addr erase_ppa);
void pblk_line_put(struct kref *ref);
+void pblk_line_put_wq(struct kref *ref);
struct list_head *pblk_line_gc_list(struct pblk *pblk, struct pblk_line *line);
u64 pblk_lookup_page(struct pblk *pblk, struct pblk_line *line);
void pblk_dealloc_page(struct pblk *pblk, struct pblk_line *line, int nr_secs);
@@ -745,7 +756,6 @@ void pblk_down_rq(struct pblk *pblk, struct ppa_addr *ppa_list, int nr_ppas,
void pblk_down_page(struct pblk *pblk, struct ppa_addr *ppa_list, int nr_ppas);
void pblk_up_rq(struct pblk *pblk, struct ppa_addr *ppa_list, int nr_ppas,
unsigned long *lun_bitmap);
-void pblk_end_bio_sync(struct bio *bio);
void pblk_end_io_sync(struct nvm_rq *rqd);
int pblk_bio_add_pages(struct pblk *pblk, struct bio *bio, gfp_t flags,
int nr_pages);
@@ -760,7 +770,7 @@ void pblk_update_map_cache(struct pblk *pblk, sector_t lba,
void pblk_update_map_dev(struct pblk *pblk, sector_t lba,
struct ppa_addr ppa, struct ppa_addr entry_line);
int pblk_update_map_gc(struct pblk *pblk, sector_t lba, struct ppa_addr ppa,
- struct pblk_line *gc_line);
+ struct pblk_line *gc_line, u64 paddr);
void pblk_lookup_l2p_rand(struct pblk *pblk, struct ppa_addr *ppas,
u64 *lba_list, int nr_secs);
void pblk_lookup_l2p_seq(struct pblk *pblk, struct ppa_addr *ppas,
@@ -771,9 +781,7 @@ void pblk_lookup_l2p_seq(struct pblk *pblk, struct ppa_addr *ppas,
*/
int pblk_write_to_cache(struct pblk *pblk, struct bio *bio,
unsigned long flags);
-int pblk_write_gc_to_cache(struct pblk *pblk, void *data, u64 *lba_list,
- unsigned int nr_entries, unsigned int nr_rec_entries,
- struct pblk_line *gc_line, unsigned long flags);
+int pblk_write_gc_to_cache(struct pblk *pblk, struct pblk_gc_rq *gc_rq);
/*
* pblk map
@@ -797,9 +805,7 @@ void pblk_write_should_kick(struct pblk *pblk);
*/
extern struct bio_set *pblk_bio_set;
int pblk_submit_read(struct pblk *pblk, struct bio *bio);
-int pblk_submit_read_gc(struct pblk *pblk, u64 *lba_list, void *data,
- unsigned int nr_secs, unsigned int *secs_to_gc,
- struct pblk_line *line);
+int pblk_submit_read_gc(struct pblk *pblk, struct pblk_gc_rq *gc_rq);
/*
* pblk recovery
*/
@@ -815,7 +821,7 @@ int pblk_recov_setup_rq(struct pblk *pblk, struct pblk_c_ctx *c_ctx,
* pblk gc
*/
#define PBLK_GC_MAX_READERS 8 /* Max number of outstanding GC reader jobs */
-#define PBLK_GC_W_QD 128 /* Queue depth for inflight GC write I/Os */
+#define PBLK_GC_RQ_QD 128 /* Queue depth for inflight GC requests */
#define PBLK_GC_L_QD 4 /* Queue depth for inflight GC lines */
#define PBLK_GC_RSV_LINE 1 /* Reserved lines for GC */
@@ -824,7 +830,7 @@ void pblk_gc_exit(struct pblk *pblk);
void pblk_gc_should_start(struct pblk *pblk);
void pblk_gc_should_stop(struct pblk *pblk);
void pblk_gc_should_kick(struct pblk *pblk);
-void pblk_gc_kick(struct pblk *pblk);
+void pblk_gc_free_full_lines(struct pblk *pblk);
void pblk_gc_sysfs_state_show(struct pblk *pblk, int *gc_enabled,
int *gc_active);
int pblk_gc_sysfs_force(struct pblk *pblk, int force);
@@ -834,8 +840,8 @@ int pblk_gc_sysfs_force(struct pblk *pblk, int force);
*/
void pblk_rl_init(struct pblk_rl *rl, int budget);
void pblk_rl_free(struct pblk_rl *rl);
+void pblk_rl_update_rates(struct pblk_rl *rl);
int pblk_rl_high_thrs(struct pblk_rl *rl);
-int pblk_rl_low_thrs(struct pblk_rl *rl);
unsigned long pblk_rl_nr_free_blks(struct pblk_rl *rl);
int pblk_rl_user_may_insert(struct pblk_rl *rl, int nr_entries);
void pblk_rl_inserted(struct pblk_rl *rl, int nr_entries);
@@ -843,10 +849,9 @@ void pblk_rl_user_in(struct pblk_rl *rl, int nr_entries);
int pblk_rl_gc_may_insert(struct pblk_rl *rl, int nr_entries);
void pblk_rl_gc_in(struct pblk_rl *rl, int nr_entries);
void pblk_rl_out(struct pblk_rl *rl, int nr_user, int nr_gc);
-int pblk_rl_sysfs_rate_show(struct pblk_rl *rl);
+int pblk_rl_max_io(struct pblk_rl *rl);
void pblk_rl_free_lines_inc(struct pblk_rl *rl, struct pblk_line *line);
void pblk_rl_free_lines_dec(struct pblk_rl *rl, struct pblk_line *line);
-void pblk_rl_set_space_limit(struct pblk_rl *rl, int entries_left);
int pblk_rl_is_limit(struct pblk_rl *rl);
/*
@@ -892,13 +897,7 @@ static inline void *emeta_to_vsc(struct pblk *pblk, struct line_emeta *emeta)
static inline int pblk_line_vsc(struct pblk_line *line)
{
- int vsc;
-
- spin_lock(&line->lock);
- vsc = le32_to_cpu(*line->vsc);
- spin_unlock(&line->lock);
-
- return vsc;
+ return le32_to_cpu(*line->vsc);
}
#define NVM_MEM_PAGE_WRITE (8)
@@ -1140,7 +1139,7 @@ static inline int pblk_set_progr_mode(struct pblk *pblk, int type)
flags = geo->plane_mode >> 1;
- if (type == WRITE)
+ if (type == PBLK_WRITE)
flags |= NVM_IO_SCRAMBLE_ENABLE;
return flags;
@@ -1200,7 +1199,6 @@ static inline void pblk_print_failed_rqd(struct pblk *pblk, struct nvm_rq *rqd,
pr_err("error:%d, ppa_status:%llx\n", error, rqd->ppa_status);
}
-#endif
static inline int pblk_boundary_ppa_checks(struct nvm_tgt_dev *tgt_dev,
struct ppa_addr *ppas, int nr_ppas)
@@ -1221,14 +1219,50 @@ static inline int pblk_boundary_ppa_checks(struct nvm_tgt_dev *tgt_dev,
ppa->g.sec < geo->sec_per_pg)
continue;
-#ifdef CONFIG_NVM_DEBUG
print_ppa(ppa, "boundary", i);
-#endif
+
return 1;
}
return 0;
}
+static inline int pblk_check_io(struct pblk *pblk, struct nvm_rq *rqd)
+{
+ struct nvm_tgt_dev *dev = pblk->dev;
+ struct ppa_addr *ppa_list;
+
+ ppa_list = (rqd->nr_ppas > 1) ? rqd->ppa_list : &rqd->ppa_addr;
+
+ if (pblk_boundary_ppa_checks(dev, ppa_list, rqd->nr_ppas)) {
+ WARN_ON(1);
+ return -EINVAL;
+ }
+
+ if (rqd->opcode == NVM_OP_PWRITE) {
+ struct pblk_line *line;
+ struct ppa_addr ppa;
+ int i;
+
+ for (i = 0; i < rqd->nr_ppas; i++) {
+ ppa = ppa_list[i];
+ line = &pblk->lines[pblk_dev_ppa_to_line(ppa)];
+
+ spin_lock(&line->lock);
+ if (line->state != PBLK_LINESTATE_OPEN) {
+ pr_err("pblk: bad ppa: line:%d,state:%d\n",
+ line->id, line->state);
+ WARN_ON(1);
+ spin_unlock(&line->lock);
+ return -EINVAL;
+ }
+ spin_unlock(&line->lock);
+ }
+ }
+
+ return 0;
+}
+#endif
+
static inline int pblk_boundary_paddr_checks(struct pblk *pblk, u64 paddr)
{
struct pblk_line_meta *lm = &pblk->lm;
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-06 15:31:09 +0300