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path: root/drivers/lightnvm/pblk-cache.c
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Diffstat (limited to 'drivers/lightnvm/pblk-cache.c')
-rw-r--r--drivers/lightnvm/pblk-cache.c137
1 files changed, 0 insertions, 137 deletions
diff --git a/drivers/lightnvm/pblk-cache.c b/drivers/lightnvm/pblk-cache.c
deleted file mode 100644
index f185f1a00008..000000000000
--- a/drivers/lightnvm/pblk-cache.c
+++ /dev/null
@@ -1,137 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Copyright (C) 2016 CNEX Labs
- * Initial release: Javier Gonzalez <javier@cnexlabs.com>
- * Matias Bjorling <matias@cnexlabs.com>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License version
- * 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * pblk-cache.c - pblk's write cache
- */
-
-#include "pblk.h"
-
-void pblk_write_to_cache(struct pblk *pblk, struct bio *bio,
- unsigned long flags)
-{
- struct pblk_w_ctx w_ctx;
- sector_t lba = pblk_get_lba(bio);
- unsigned long start_time;
- unsigned int bpos, pos;
- int nr_entries = pblk_get_secs(bio);
- int i, ret;
-
- start_time = bio_start_io_acct(bio);
-
- /* Update the write buffer head (mem) with the entries that we can
- * write. The write in itself cannot fail, so there is no need to
- * rollback from here on.
- */
-retry:
- ret = pblk_rb_may_write_user(&pblk->rwb, bio, nr_entries, &bpos);
- switch (ret) {
- case NVM_IO_REQUEUE:
- io_schedule();
- goto retry;
- case NVM_IO_ERR:
- pblk_pipeline_stop(pblk);
- bio_io_error(bio);
- goto out;
- }
-
- pblk_ppa_set_empty(&w_ctx.ppa);
- w_ctx.flags = flags;
- if (bio->bi_opf & REQ_PREFLUSH) {
- w_ctx.flags |= PBLK_FLUSH_ENTRY;
- pblk_write_kick(pblk);
- }
-
- if (unlikely(!bio_has_data(bio)))
- goto out;
-
- for (i = 0; i < nr_entries; i++) {
- void *data = bio_data(bio);
-
- w_ctx.lba = lba + i;
-
- pos = pblk_rb_wrap_pos(&pblk->rwb, bpos + i);
- pblk_rb_write_entry_user(&pblk->rwb, data, w_ctx, pos);
-
- bio_advance(bio, PBLK_EXPOSED_PAGE_SIZE);
- }
-
- atomic64_add(nr_entries, &pblk->user_wa);
-
-#ifdef CONFIG_NVM_PBLK_DEBUG
- atomic_long_add(nr_entries, &pblk->inflight_writes);
- atomic_long_add(nr_entries, &pblk->req_writes);
-#endif
-
- pblk_rl_inserted(&pblk->rl, nr_entries);
-
-out:
- bio_end_io_acct(bio, start_time);
- pblk_write_should_kick(pblk);
-
- if (ret == NVM_IO_DONE)
- bio_endio(bio);
-}
-
-/*
- * 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, 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
- * write. The write in itself cannot fail, so there is no need to
- * rollback from here on.
- */
-retry:
- if (!pblk_rb_may_write_gc(&pblk->rwb, gc_rq->secs_to_gc, &bpos)) {
- io_schedule();
- goto retry;
- }
-
- w_ctx.flags = PBLK_IOTYPE_GC;
- pblk_ppa_set_empty(&w_ctx.ppa);
-
- for (i = 0, valid_entries = 0; i < gc_rq->nr_secs; i++) {
- if (gc_rq->lba_list[i] == ADDR_EMPTY)
- continue;
-
- 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_rq->line,
- gc_rq->paddr_list[i], pos);
-
- data += PBLK_EXPOSED_PAGE_SIZE;
- valid_entries++;
- }
-
- WARN_ONCE(gc_rq->secs_to_gc != valid_entries,
- "pblk: inconsistent GC write\n");
-
- atomic64_add(valid_entries, &pblk->gc_wa);
-
-#ifdef CONFIG_NVM_PBLK_DEBUG
- atomic_long_add(valid_entries, &pblk->inflight_writes);
- atomic_long_add(valid_entries, &pblk->recov_gc_writes);
-#endif
-
- pblk_write_should_kick(pblk);
- return NVM_IO_OK;
-}