#include "pblk.h"
-static void pblk_sync_line(struct pblk *pblk, struct pblk_line *line)
-{
-#ifdef CONFIG_NVM_DEBUG
- atomic_long_inc(&pblk->sync_writes);
-#endif
-
- /* Counter protected by rb sync lock */
- line->left_ssecs--;
- if (!line->left_ssecs)
- pblk_line_run_ws(pblk, line, NULL, pblk_line_close_ws);
-}
-
static unsigned long pblk_end_w_bio(struct pblk *pblk, struct nvm_rq *rqd,
struct pblk_c_ctx *c_ctx)
{
for (i = 0; i < c_ctx->nr_valid; i++) {
struct pblk_w_ctx *w_ctx;
- struct ppa_addr p;
- struct pblk_line *line;
w_ctx = pblk_rb_w_ctx(&pblk->rwb, c_ctx->sentry + i);
-
- p = rqd->ppa_list[i];
- line = &pblk->lines[pblk_dev_ppa_to_line(p)];
- pblk_sync_line(pblk, line);
-
while ((original_bio = bio_list_pop(&w_ctx->bios)))
bio_endio(original_bio);
}
#ifdef CONFIG_NVM_DEBUG
- atomic_long_add(c_ctx->nr_valid, &pblk->compl_writes);
+ atomic_long_add(c_ctx->nr_valid, &pblk->sync_writes);
#endif
ret = pblk_rb_sync_advance(&pblk->rwb, c_ctx->nr_valid);
}
INIT_WORK(&recovery->ws_rec, pblk_submit_rec);
- queue_work(pblk->kw_wq, &recovery->ws_rec);
+ queue_work(pblk->close_wq, &recovery->ws_rec);
out:
pblk_complete_write(pblk, rqd, c_ctx);
}
#ifdef CONFIG_NVM_DEBUG
else
- WARN_ONCE(rqd->bio->bi_error, "pblk: corrupted write error\n");
+ WARN_ONCE(rqd->bio->bi_status, "pblk: corrupted write error\n");
#endif
pblk_complete_write(pblk, rqd, c_ctx);
+ atomic_dec(&pblk->inflight_io);
+}
+
+static void pblk_end_io_write_meta(struct nvm_rq *rqd)
+{
+ struct pblk *pblk = rqd->private;
+ struct nvm_tgt_dev *dev = pblk->dev;
+ struct nvm_geo *geo = &dev->geo;
+ struct pblk_g_ctx *m_ctx = nvm_rq_to_pdu(rqd);
+ struct pblk_line *line = m_ctx->private;
+ struct pblk_emeta *emeta = line->emeta;
+ int pos = pblk_ppa_to_pos(geo, rqd->ppa_list[0]);
+ struct pblk_lun *rlun = &pblk->luns[pos];
+ int sync;
+
+ up(&rlun->wr_sem);
+
+ if (rqd->error) {
+ 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);
+
+ bio_put(rqd->bio);
+ pblk_free_rqd(pblk, rqd, READ);
+
+ atomic_dec(&pblk->inflight_io);
}
static int pblk_alloc_w_rq(struct pblk *pblk, struct nvm_rq *rqd,
- unsigned int nr_secs)
+ unsigned int nr_secs,
+ nvm_end_io_fn(*end_io))
{
struct nvm_tgt_dev *dev = pblk->dev;
rqd->nr_ppas = nr_secs;
rqd->flags = pblk_set_progr_mode(pblk, WRITE);
rqd->private = pblk;
- rqd->end_io = pblk_end_io_write;
+ rqd->end_io = end_io;
rqd->meta_list = nvm_dev_dma_alloc(dev->parent, GFP_KERNEL,
&rqd->dma_meta_list);
}
static int pblk_setup_w_rq(struct pblk *pblk, struct nvm_rq *rqd,
- struct pblk_c_ctx *c_ctx)
+ struct pblk_c_ctx *c_ctx, struct ppa_addr *erase_ppa)
{
struct pblk_line_meta *lm = &pblk->lm;
- struct pblk_line *e_line = pblk_line_get_data_next(pblk);
- struct ppa_addr erase_ppa;
+ struct pblk_line *e_line = pblk_line_get_erase(pblk);
unsigned int valid = c_ctx->nr_valid;
unsigned int padded = c_ctx->nr_padded;
unsigned int nr_secs = valid + padded;
int ret = 0;
lun_bitmap = kzalloc(lm->lun_bitmap_len, GFP_KERNEL);
- if (!lun_bitmap) {
- ret = -ENOMEM;
- goto out;
- }
+ if (!lun_bitmap)
+ return -ENOMEM;
c_ctx->lun_bitmap = lun_bitmap;
- ret = pblk_alloc_w_rq(pblk, rqd, nr_secs);
+ ret = pblk_alloc_w_rq(pblk, rqd, nr_secs, pblk_end_io_write);
if (ret) {
kfree(lun_bitmap);
- goto out;
+ return ret;
}
- ppa_set_empty(&erase_ppa);
if (likely(!e_line || !atomic_read(&e_line->left_eblks)))
pblk_map_rq(pblk, rqd, c_ctx->sentry, lun_bitmap, valid, 0);
else
pblk_map_erase_rq(pblk, rqd, c_ctx->sentry, lun_bitmap,
- valid, &erase_ppa);
-
-out:
- if (unlikely(e_line && !ppa_empty(erase_ppa))) {
- if (pblk_blk_erase_async(pblk, erase_ppa)) {
- struct nvm_tgt_dev *dev = pblk->dev;
- struct nvm_geo *geo = &dev->geo;
- int bit;
-
- atomic_inc(&e_line->left_eblks);
- bit = erase_ppa.g.lun * geo->nr_chnls + erase_ppa.g.ch;
- WARN_ON(!test_and_clear_bit(bit, e_line->erase_bitmap));
- up(&pblk->erase_sem);
- }
- }
+ valid, erase_ppa);
- return ret;
+ return 0;
}
int pblk_setup_w_rec_rq(struct pblk *pblk, struct nvm_rq *rqd,
c_ctx->lun_bitmap = lun_bitmap;
- ret = pblk_alloc_w_rq(pblk, rqd, rqd->nr_ppas);
+ ret = pblk_alloc_w_rq(pblk, rqd, rqd->nr_ppas, pblk_end_io_write);
if (ret)
return ret;
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;
+ struct nvm_geo *geo = &dev->geo;
+ struct pblk_line_mgmt *l_mg = &pblk->l_mg;
+ struct pblk_line_meta *lm = &pblk->lm;
+ struct pblk_emeta *emeta = meta_line->emeta;
+ struct pblk_g_ctx *m_ctx;
+ struct pblk_lun *rlun;
+ struct bio *bio;
+ struct nvm_rq *rqd;
+ void *data;
+ u64 paddr;
+ int rq_ppas = pblk->min_write_pgs;
+ int id = meta_line->id;
+ int rq_len;
+ 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);
+ }
+ m_ctx = nvm_rq_to_pdu(rqd);
+ m_ctx->private = meta_line;
+
+ rq_len = rq_ppas * geo->sec_size;
+ data = ((void *)emeta->buf) + emeta->mem;
+
+ bio = pblk_bio_map_addr(pblk, data, rq_ppas, rq_len,
+ l_mg->emeta_alloc_type, GFP_KERNEL);
+ if (IS_ERR(bio)) {
+ ret = PTR_ERR(bio);
+ goto fail_free_rqd;
+ }
+ bio->bi_iter.bi_sector = 0; /* internal bio */
+ bio_set_op_attrs(bio, REQ_OP_WRITE, 0);
+ rqd->bio = bio;
+
+ ret = pblk_alloc_w_rq(pblk, rqd, rq_ppas, pblk_end_io_write_meta);
+ if (ret)
+ goto fail_free_bio;
+
+ for (i = 0; i < rqd->nr_ppas; ) {
+ spin_lock(&meta_line->lock);
+ paddr = __pblk_alloc_page(pblk, meta_line, rq_ppas);
+ spin_unlock(&meta_line->lock);
+ for (j = 0; j < rq_ppas; j++, i++, paddr++)
+ rqd->ppa_list[i] = addr_to_gen_ppa(pblk, paddr, id);
+ }
+
+ rlun = &pblk->luns[pblk_ppa_to_pos(geo, rqd->ppa_list[0])];
+ ret = down_timeout(&rlun->wr_sem, msecs_to_jiffies(5000));
+ if (ret) {
+ pr_err("pblk: lun semaphore timed out (%d)\n", ret);
+ goto fail_free_bio;
+ }
+
+ emeta->mem += rq_len;
+ 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);
+ }
+
+ ret = pblk_submit_io(pblk, rqd);
+ if (ret) {
+ pr_err("pblk: emeta I/O submission failed: %d\n", ret);
+ goto fail_rollback;
+ }
+
+ return NVM_IO_OK;
+
+fail_rollback:
+ spin_lock(&l_mg->close_lock);
+ pblk_dealloc_page(pblk, meta_line, rq_ppas);
+ list_add(&meta_line->list, &meta_line->list);
+ spin_unlock(&l_mg->close_lock);
+fail_free_bio:
+ if (likely(l_mg->emeta_alloc_type == PBLK_VMALLOC_META))
+ bio_put(bio);
+fail_free_rqd:
+ pblk_free_rqd(pblk, rqd, READ);
+ return ret;
+}
+
+static int pblk_sched_meta_io(struct pblk *pblk, struct ppa_addr *prev_list,
+ int prev_n)
+{
+ struct pblk_line_meta *lm = &pblk->lm;
+ struct pblk_line_mgmt *l_mg = &pblk->l_mg;
+ struct pblk_line *meta_line;
+
+ spin_lock(&l_mg->close_lock);
+retry:
+ if (list_empty(&l_mg->emeta_list)) {
+ spin_unlock(&l_mg->close_lock);
+ return 0;
+ }
+ meta_line = list_first_entry(&l_mg->emeta_list, struct pblk_line, list);
+ if (bitmap_full(meta_line->map_bitmap, lm->sec_per_line))
+ goto retry;
+ spin_unlock(&l_mg->close_lock);
+
+ if (!pblk_valid_meta_ppa(pblk, meta_line, prev_list, prev_n))
+ return 0;
+
+ return pblk_submit_meta_io(pblk, 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;
+ 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);
+ 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;
+ }
+
+ /* 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 available 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;
+ struct nvm_geo *geo = &dev->geo;
+ int bit;
+
+ atomic_inc(&e_line->left_eblks);
+ bit = pblk_ppa_to_pos(geo, erase_ppa);
+ WARN_ON(!test_and_clear_bit(bit, e_line->erase_bitmap));
+ }
+ }
+
+ return NVM_IO_OK;
+}
+
+static void pblk_free_write_rqd(struct pblk *pblk, struct nvm_rq *rqd)
+{
+ struct pblk_c_ctx *c_ctx = nvm_rq_to_pdu(rqd);
+ struct bio *bio = rqd->bio;
+
+ if (c_ctx->nr_padded)
+ pblk_bio_free_pages(pblk, bio, rqd->nr_ppas, c_ctx->nr_padded);
+}
+
static int pblk_submit_write(struct pblk *pblk)
{
struct bio *bio;
struct nvm_rq *rqd;
- struct pblk_c_ctx *c_ctx;
- unsigned int pgs_read;
unsigned int secs_avail, secs_to_sync, secs_to_com;
unsigned int secs_to_flush;
unsigned long pos;
- int err;
/* If there are no sectors in the cache, flushes (bios without data)
* will be cleared on the cache threads
pr_err("pblk: cannot allocate write req.\n");
return 1;
}
- c_ctx = nvm_rq_to_pdu(rqd);
bio = bio_alloc(GFP_KERNEL, pblk->max_write_pgs);
if (!bio) {
secs_to_com = (secs_to_sync > secs_avail) ? secs_avail : secs_to_sync;
pos = pblk_rb_read_commit(&pblk->rwb, secs_to_com);
- pgs_read = pblk_rb_read_to_bio(&pblk->rwb, bio, c_ctx, pos,
- secs_to_sync, secs_avail);
- if (!pgs_read) {
+ if (pblk_rb_read_to_bio(&pblk->rwb, rqd, bio, pos, secs_to_sync,
+ secs_avail)) {
pr_err("pblk: corrupted write bio\n");
goto fail_put_bio;
}
- if (c_ctx->nr_padded)
- if (pblk_bio_add_pages(pblk, bio, GFP_KERNEL, c_ctx->nr_padded))
- goto fail_put_bio;
-
- /* Assign lbas to ppas and populate request structure */
- err = pblk_setup_w_rq(pblk, rqd, c_ctx);
- if (err) {
- pr_err("pblk: could not setup write request\n");
- goto fail_free_bio;
- }
-
- err = pblk_submit_io(pblk, rqd);
- if (err) {
- pr_err("pblk: I/O submission failed: %d\n", err);
+ if (pblk_submit_io_set(pblk, rqd))
goto fail_free_bio;
- }
#ifdef CONFIG_NVM_DEBUG
atomic_long_add(secs_to_sync, &pblk->sub_writes);
return 0;
fail_free_bio:
- if (c_ctx->nr_padded)
- pblk_bio_free_pages(pblk, bio, secs_to_sync, c_ctx->nr_padded);
+ pblk_free_write_rqd(pblk, rqd);
fail_put_bio:
bio_put(bio);
fail_free_rqd:
projects / platform / kernel / linux-starfive.git / blobdiff