Commit 43d47127 authored by Javier González's avatar Javier González Committed by Jens Axboe

lightnvm: pblk: refactor init/exit sequences

Refactor init and exit sequences to eliminate dependencies among init
modules and improve readability.
Signed-off-by: default avatarJavier González <javier@cnexlabs.com>
Signed-off-by: default avatarMatias Bjørling <mb@lightnvm.io>
Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 9d7aa4a4
......@@ -103,7 +103,40 @@ static void pblk_l2p_free(struct pblk *pblk)
vfree(pblk->trans_map);
}
static int pblk_l2p_init(struct pblk *pblk)
static int pblk_l2p_recover(struct pblk *pblk, bool factory_init)
{
struct pblk_line *line = NULL;
if (factory_init) {
pblk_setup_uuid(pblk);
} else {
line = pblk_recov_l2p(pblk);
if (IS_ERR(line)) {
pr_err("pblk: could not recover l2p table\n");
return -EFAULT;
}
}
#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);
if (!line) {
pr_err("pblk: line list corrupted\n");
return -EFAULT;
}
}
return 0;
}
static int pblk_l2p_init(struct pblk *pblk, bool factory_init)
{
sector_t i;
struct ppa_addr ppa;
......@@ -119,7 +152,7 @@ static int pblk_l2p_init(struct pblk *pblk)
for (i = 0; i < pblk->rl.nr_secs; i++)
pblk_trans_map_set(pblk, i, ppa);
return 0;
return pblk_l2p_recover(pblk, factory_init);
}
static void pblk_rwb_free(struct pblk *pblk)
......@@ -159,7 +192,13 @@ static int pblk_set_ppaf(struct pblk *pblk)
struct nvm_tgt_dev *dev = pblk->dev;
struct nvm_geo *geo = &dev->geo;
struct nvm_addr_format ppaf = geo->ppaf;
int power_len;
int mod, power_len;
div_u64_rem(geo->sec_per_chk, pblk->min_write_pgs, &mod);
if (mod) {
pr_err("pblk: bad configuration of sectors/pages\n");
return -EINVAL;
}
/* Re-calculate channel and lun format to adapt to configuration */
power_len = get_count_order(geo->nr_chnls);
......@@ -252,13 +291,40 @@ static int pblk_core_init(struct pblk *pblk)
{
struct nvm_tgt_dev *dev = pblk->dev;
struct nvm_geo *geo = &dev->geo;
int max_write_ppas;
atomic64_set(&pblk->user_wa, 0);
atomic64_set(&pblk->pad_wa, 0);
atomic64_set(&pblk->gc_wa, 0);
pblk->user_rst_wa = 0;
pblk->pad_rst_wa = 0;
pblk->gc_rst_wa = 0;
atomic64_set(&pblk->nr_flush, 0);
pblk->nr_flush_rst = 0;
pblk->pgs_in_buffer = NVM_MEM_PAGE_WRITE * geo->sec_per_pg *
geo->nr_planes * geo->all_luns;
if (pblk_init_global_caches(pblk))
pblk->min_write_pgs = geo->sec_per_pl * (geo->sec_size / PAGE_SIZE);
max_write_ppas = pblk->min_write_pgs * geo->all_luns;
pblk->max_write_pgs = min_t(int, max_write_ppas, NVM_MAX_VLBA);
pblk_set_sec_per_write(pblk, pblk->min_write_pgs);
if (pblk->max_write_pgs > PBLK_MAX_REQ_ADDRS) {
pr_err("pblk: vector list too big(%u > %u)\n",
pblk->max_write_pgs, PBLK_MAX_REQ_ADDRS);
return -EINVAL;
}
pblk->pad_dist = kzalloc((pblk->min_write_pgs - 1) * sizeof(atomic64_t),
GFP_KERNEL);
if (!pblk->pad_dist)
return -ENOMEM;
if (pblk_init_global_caches(pblk))
goto fail_free_pad_dist;
/* Internal bios can be at most the sectors signaled by the device. */
pblk->page_bio_pool = mempool_create_page_pool(NVM_MAX_VLBA, 0);
if (!pblk->page_bio_pool)
......@@ -307,10 +373,8 @@ static int pblk_core_init(struct pblk *pblk)
if (pblk_set_ppaf(pblk))
goto free_r_end_wq;
if (pblk_rwb_init(pblk))
goto free_r_end_wq;
INIT_LIST_HEAD(&pblk->compl_list);
return 0;
free_r_end_wq:
......@@ -333,6 +397,8 @@ static int pblk_core_init(struct pblk *pblk)
mempool_destroy(pblk->page_bio_pool);
free_global_caches:
pblk_free_global_caches(pblk);
fail_free_pad_dist:
kfree(pblk->pad_dist);
return -ENOMEM;
}
......@@ -354,14 +420,8 @@ static void pblk_core_free(struct pblk *pblk)
mempool_destroy(pblk->e_rq_pool);
mempool_destroy(pblk->w_rq_pool);
pblk_rwb_free(pblk);
pblk_free_global_caches(pblk);
}
static void pblk_luns_free(struct pblk *pblk)
{
kfree(pblk->luns);
kfree(pblk->pad_dist);
}
static void pblk_line_mg_free(struct pblk *pblk)
......@@ -378,8 +438,6 @@ static void pblk_line_mg_free(struct pblk *pblk)
pblk_mfree(l_mg->eline_meta[i]->buf, l_mg->emeta_alloc_type);
kfree(l_mg->eline_meta[i]);
}
kfree(pblk->lines);
}
static void pblk_line_meta_free(struct pblk_line *line)
......@@ -402,6 +460,11 @@ static void pblk_lines_free(struct pblk *pblk)
pblk_line_meta_free(line);
}
spin_unlock(&l_mg->free_lock);
pblk_line_mg_free(pblk);
kfree(pblk->luns);
kfree(pblk->lines);
}
static int pblk_bb_get_tbl(struct nvm_tgt_dev *dev, struct pblk_lun *rlun,
......@@ -476,7 +539,7 @@ static int pblk_bb_line(struct pblk *pblk, struct pblk_line *line,
return bb_cnt;
}
static int pblk_luns_init(struct pblk *pblk, struct ppa_addr *luns)
static int pblk_luns_init(struct pblk *pblk)
{
struct nvm_tgt_dev *dev = pblk->dev;
struct nvm_geo *geo = &dev->geo;
......@@ -501,7 +564,7 @@ static int pblk_luns_init(struct pblk *pblk, struct ppa_addr *luns)
int lunid = lun_raw + ch * geo->nr_luns;
rlun = &pblk->luns[i];
rlun->bppa = luns[lunid];
rlun->bppa = dev->luns[lunid];
sema_init(&rlun->wr_sem, 1);
}
......@@ -509,38 +572,6 @@ static int pblk_luns_init(struct pblk *pblk, struct ppa_addr *luns)
return 0;
}
static int pblk_lines_configure(struct pblk *pblk, int flags)
{
struct pblk_line *line = NULL;
int ret = 0;
if (!(flags & NVM_TARGET_FACTORY)) {
line = pblk_recov_l2p(pblk);
if (IS_ERR(line)) {
pr_err("pblk: could not recover l2p table\n");
ret = -EFAULT;
}
}
#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);
if (!line) {
pr_err("pblk: line list corrupted\n");
ret = -EFAULT;
}
}
return ret;
}
/* See comment over struct line_emeta definition */
static unsigned int calc_emeta_len(struct pblk *pblk)
{
......@@ -606,11 +637,70 @@ static void pblk_set_provision(struct pblk *pblk, long nr_free_blks)
atomic_set(&pblk->rl.free_user_blocks, nr_free_blks);
}
static int pblk_lines_alloc_metadata(struct pblk *pblk)
static int pblk_setup_line_meta(struct pblk *pblk, struct pblk_line *line,
void *chunk_log, long *nr_bad_blks)
{
struct pblk_line_meta *lm = &pblk->lm;
line->blk_bitmap = kzalloc(lm->blk_bitmap_len, GFP_KERNEL);
if (!line->blk_bitmap)
return -ENOMEM;
line->erase_bitmap = kzalloc(lm->blk_bitmap_len, GFP_KERNEL);
if (!line->erase_bitmap) {
kfree(line->blk_bitmap);
return -ENOMEM;
}
*nr_bad_blks = pblk_bb_line(pblk, line, chunk_log, lm->blk_per_line);
return 0;
}
static int pblk_line_mg_init(struct pblk *pblk)
{
struct nvm_tgt_dev *dev = pblk->dev;
struct nvm_geo *geo = &dev->geo;
struct pblk_line_mgmt *l_mg = &pblk->l_mg;
struct pblk_line_meta *lm = &pblk->lm;
int i;
int i, bb_distance;
l_mg->nr_lines = geo->nr_chks;
l_mg->log_line = l_mg->data_line = NULL;
l_mg->l_seq_nr = l_mg->d_seq_nr = 0;
l_mg->nr_free_lines = 0;
bitmap_zero(&l_mg->meta_bitmap, PBLK_DATA_LINES);
INIT_LIST_HEAD(&l_mg->free_list);
INIT_LIST_HEAD(&l_mg->corrupt_list);
INIT_LIST_HEAD(&l_mg->bad_list);
INIT_LIST_HEAD(&l_mg->gc_full_list);
INIT_LIST_HEAD(&l_mg->gc_high_list);
INIT_LIST_HEAD(&l_mg->gc_mid_list);
INIT_LIST_HEAD(&l_mg->gc_low_list);
INIT_LIST_HEAD(&l_mg->gc_empty_list);
INIT_LIST_HEAD(&l_mg->emeta_list);
l_mg->gc_lists[0] = &l_mg->gc_high_list;
l_mg->gc_lists[1] = &l_mg->gc_mid_list;
l_mg->gc_lists[2] = &l_mg->gc_low_list;
spin_lock_init(&l_mg->free_lock);
spin_lock_init(&l_mg->close_lock);
spin_lock_init(&l_mg->gc_lock);
l_mg->vsc_list = kcalloc(l_mg->nr_lines, sizeof(__le32), GFP_KERNEL);
if (!l_mg->vsc_list)
goto fail;
l_mg->bb_template = kzalloc(lm->sec_bitmap_len, GFP_KERNEL);
if (!l_mg->bb_template)
goto fail_free_vsc_list;
l_mg->bb_aux = kzalloc(lm->sec_bitmap_len, GFP_KERNEL);
if (!l_mg->bb_aux)
goto fail_free_bb_template;
/* smeta is always small enough to fit on a kmalloc memory allocation,
* emeta depends on the number of LUNs allocated to the pblk instance
......@@ -656,13 +746,13 @@ static int pblk_lines_alloc_metadata(struct pblk *pblk)
}
}
l_mg->vsc_list = kcalloc(l_mg->nr_lines, sizeof(__le32), GFP_KERNEL);
if (!l_mg->vsc_list)
goto fail_free_emeta;
for (i = 0; i < l_mg->nr_lines; i++)
l_mg->vsc_list[i] = cpu_to_le32(EMPTY_ENTRY);
bb_distance = (geo->all_luns) * geo->ws_opt;
for (i = 0; i < lm->sec_per_line; i += bb_distance)
bitmap_set(l_mg->bb_template, i, geo->ws_opt);
return 0;
fail_free_emeta:
......@@ -673,69 +763,25 @@ static int pblk_lines_alloc_metadata(struct pblk *pblk)
kfree(l_mg->eline_meta[i]->buf);
kfree(l_mg->eline_meta[i]);
}
fail_free_smeta:
for (i = 0; i < PBLK_DATA_LINES; i++)
kfree(l_mg->sline_meta[i]);
kfree(l_mg->bb_aux);
fail_free_bb_template:
kfree(l_mg->bb_template);
fail_free_vsc_list:
kfree(l_mg->vsc_list);
fail:
return -ENOMEM;
}
static int pblk_setup_line_meta(struct pblk *pblk, struct pblk_line *line,
void *chunk_log, long *nr_bad_blks)
{
struct pblk_line_meta *lm = &pblk->lm;
line->blk_bitmap = kzalloc(lm->blk_bitmap_len, GFP_KERNEL);
if (!line->blk_bitmap)
return -ENOMEM;
line->erase_bitmap = kzalloc(lm->blk_bitmap_len, GFP_KERNEL);
if (!line->erase_bitmap) {
kfree(line->blk_bitmap);
return -ENOMEM;
}
*nr_bad_blks = pblk_bb_line(pblk, line, chunk_log, lm->blk_per_line);
return 0;
}
static int pblk_lines_init(struct pblk *pblk)
static int pblk_line_meta_init(struct pblk *pblk)
{
struct nvm_tgt_dev *dev = pblk->dev;
struct nvm_geo *geo = &dev->geo;
struct pblk_line_mgmt *l_mg = &pblk->l_mg;
struct pblk_line_meta *lm = &pblk->lm;
struct pblk_line *line;
void *chunk_log;
unsigned int smeta_len, emeta_len;
long nr_bad_blks = 0, nr_free_blks = 0;
int bb_distance, max_write_ppas, mod;
int i, ret;
pblk->min_write_pgs = geo->sec_per_pl * (geo->sec_size / PAGE_SIZE);
max_write_ppas = pblk->min_write_pgs * geo->all_luns;
pblk->max_write_pgs = min_t(int, max_write_ppas, NVM_MAX_VLBA);
pblk_set_sec_per_write(pblk, pblk->min_write_pgs);
if (pblk->max_write_pgs > PBLK_MAX_REQ_ADDRS) {
pr_err("pblk: vector list too big(%u > %u)\n",
pblk->max_write_pgs, PBLK_MAX_REQ_ADDRS);
return -EINVAL;
}
div_u64_rem(geo->sec_per_chk, pblk->min_write_pgs, &mod);
if (mod) {
pr_err("pblk: bad configuration of sectors/pages\n");
return -EINVAL;
}
l_mg->nr_lines = geo->nr_chks;
l_mg->log_line = l_mg->data_line = NULL;
l_mg->l_seq_nr = l_mg->d_seq_nr = 0;
l_mg->nr_free_lines = 0;
bitmap_zero(&l_mg->meta_bitmap, PBLK_DATA_LINES);
int i;
lm->sec_per_line = geo->sec_per_chk * geo->all_luns;
lm->blk_per_line = geo->all_luns;
......@@ -787,58 +833,43 @@ static int pblk_lines_init(struct pblk *pblk)
return -EINVAL;
}
ret = pblk_lines_alloc_metadata(pblk);
return 0;
}
static int pblk_lines_init(struct pblk *pblk)
{
struct pblk_line_mgmt *l_mg = &pblk->l_mg;
struct pblk_line_meta *lm = &pblk->lm;
struct pblk_line *line;
void *chunk_log;
long nr_bad_blks = 0, nr_free_blks = 0;
int i, ret;
ret = pblk_line_meta_init(pblk);
if (ret)
return ret;
l_mg->bb_template = kzalloc(lm->sec_bitmap_len, GFP_KERNEL);
if (!l_mg->bb_template) {
ret = -ENOMEM;
ret = pblk_line_mg_init(pblk);
if (ret)
return ret;
ret = pblk_luns_init(pblk);
if (ret)
goto fail_free_meta;
}
l_mg->bb_aux = kzalloc(lm->sec_bitmap_len, GFP_KERNEL);
if (!l_mg->bb_aux) {
ret = -ENOMEM;
goto fail_free_bb_template;
chunk_log = pblk_bb_get_log(pblk);
if (IS_ERR(chunk_log)) {
pr_err("pblk: could not get bad block log (%lu)\n",
PTR_ERR(chunk_log));
ret = PTR_ERR(chunk_log);
goto fail_free_luns;
}
bb_distance = (geo->all_luns) * geo->sec_per_pl;
for (i = 0; i < lm->sec_per_line; i += bb_distance)
bitmap_set(l_mg->bb_template, i, geo->sec_per_pl);
INIT_LIST_HEAD(&l_mg->free_list);
INIT_LIST_HEAD(&l_mg->corrupt_list);
INIT_LIST_HEAD(&l_mg->bad_list);
INIT_LIST_HEAD(&l_mg->gc_full_list);
INIT_LIST_HEAD(&l_mg->gc_high_list);
INIT_LIST_HEAD(&l_mg->gc_mid_list);
INIT_LIST_HEAD(&l_mg->gc_low_list);
INIT_LIST_HEAD(&l_mg->gc_empty_list);
INIT_LIST_HEAD(&l_mg->emeta_list);
l_mg->gc_lists[0] = &l_mg->gc_high_list;
l_mg->gc_lists[1] = &l_mg->gc_mid_list;
l_mg->gc_lists[2] = &l_mg->gc_low_list;
spin_lock_init(&l_mg->free_lock);
spin_lock_init(&l_mg->close_lock);
spin_lock_init(&l_mg->gc_lock);
pblk->lines = kcalloc(l_mg->nr_lines, sizeof(struct pblk_line),
GFP_KERNEL);
if (!pblk->lines) {
ret = -ENOMEM;
goto fail_free_bb_aux;
}
chunk_log = pblk_bb_get_log(pblk);
if (IS_ERR(chunk_log)) {
pr_err("pblk: could not get bad block log (%lu)\n",
PTR_ERR(chunk_log));
ret = PTR_ERR(chunk_log);
goto fail_free_bb_aux;
goto fail_free_chunk_log;
}
for (i = 0; i < l_mg->nr_lines; i++) {
......@@ -856,7 +887,7 @@ static int pblk_lines_init(struct pblk *pblk)
ret = pblk_setup_line_meta(pblk, line, chunk_log, &nr_bad_blks);
if (ret)
goto fail_free_chunk_log;
goto fail_free_lines;
chk_in_line = lm->blk_per_line - nr_bad_blks;
if (nr_bad_blks < 0 || nr_bad_blks > lm->blk_per_line ||
......@@ -878,14 +909,14 @@ static int pblk_lines_init(struct pblk *pblk)
kfree(chunk_log);
return 0;
fail_free_chunk_log:
kfree(chunk_log);
fail_free_lines:
while (--i >= 0)
pblk_line_meta_free(&pblk->lines[i]);
fail_free_bb_aux:
kfree(l_mg->bb_aux);
fail_free_bb_template:
kfree(l_mg->bb_template);
kfree(pblk->lines);
fail_free_chunk_log:
kfree(chunk_log);
fail_free_luns:
kfree(pblk->luns);
fail_free_meta:
pblk_line_mg_free(pblk);
......@@ -928,12 +959,10 @@ static void pblk_writer_stop(struct pblk *pblk)
static void pblk_free(struct pblk *pblk)
{
pblk_luns_free(pblk);
pblk_lines_free(pblk);
kfree(pblk->pad_dist);
pblk_line_mg_free(pblk);
pblk_core_free(pblk);
pblk_l2p_free(pblk);
pblk_rwb_free(pblk);
pblk_core_free(pblk);
kfree(pblk);
}
......@@ -998,19 +1027,6 @@ static void *pblk_init(struct nvm_tgt_dev *dev, struct gendisk *tdisk,
spin_lock_init(&pblk->trans_lock);
spin_lock_init(&pblk->lock);
if (flags & NVM_TARGET_FACTORY)
pblk_setup_uuid(pblk);
atomic64_set(&pblk->user_wa, 0);
atomic64_set(&pblk->pad_wa, 0);
atomic64_set(&pblk->gc_wa, 0);
pblk->user_rst_wa = 0;
pblk->pad_rst_wa = 0;
pblk->gc_rst_wa = 0;
atomic64_set(&pblk->nr_flush, 0);
pblk->nr_flush_rst = 0;
#ifdef CONFIG_NVM_DEBUG
atomic_long_set(&pblk->inflight_writes, 0);
atomic_long_set(&pblk->padded_writes, 0);
......@@ -1034,48 +1050,35 @@ static void *pblk_init(struct nvm_tgt_dev *dev, struct gendisk *tdisk,
atomic_long_set(&pblk->write_failed, 0);
atomic_long_set(&pblk->erase_failed, 0);
ret = pblk_luns_init(pblk, dev->luns);
ret = pblk_core_init(pblk);
if (ret) {
pr_err("pblk: could not initialize luns\n");
pr_err("pblk: could not initialize core\n");
goto fail;
}
ret = pblk_lines_init(pblk);
if (ret) {
pr_err("pblk: could not initialize lines\n");
goto fail_free_luns;
}
pblk->pad_dist = kzalloc((pblk->min_write_pgs - 1) * sizeof(atomic64_t),
GFP_KERNEL);
if (!pblk->pad_dist) {
ret = -ENOMEM;
goto fail_free_line_meta;
goto fail_free_core;
}
ret = pblk_core_init(pblk);
ret = pblk_rwb_init(pblk);
if (ret) {
pr_err("pblk: could not initialize core\n");
goto fail_free_pad_dist;
pr_err("pblk: could not initialize write buffer\n");
goto fail_free_lines;
}
ret = pblk_l2p_init(pblk);
ret = pblk_l2p_init(pblk, flags & NVM_TARGET_FACTORY);
if (ret) {
pr_err("pblk: could not initialize maps\n");
goto fail_free_core;
}
ret = pblk_lines_configure(pblk, flags);
if (ret) {
pr_err("pblk: could not configure lines\n");
goto fail_free_l2p;
goto fail_free_rwb;
}
ret = pblk_writer_init(pblk);
if (ret) {
if (ret != -EINTR)
pr_err("pblk: could not initialize write thread\n");
goto fail_free_lines;
goto fail_free_l2p;
}
ret = pblk_gc_init(pblk);
......@@ -1110,18 +1113,14 @@ static void *pblk_init(struct nvm_tgt_dev *dev, struct gendisk *tdisk,
fail_stop_writer:
pblk_writer_stop(pblk);
fail_free_lines:
pblk_lines_free(pblk);
fail_free_l2p:
pblk_l2p_free(pblk);
fail_free_rwb:
pblk_rwb_free(pblk);
fail_free_lines:
pblk_lines_free(pblk);
fail_free_core:
pblk_core_free(pblk);
fail_free_pad_dist:
kfree(pblk->pad_dist);
fail_free_line_meta:
pblk_line_mg_free(pblk);
fail_free_luns:
pblk_luns_free(pblk);
fail:
kfree(pblk);
return ERR_PTR(ret);
......
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