1 files changed, 0 insertions, 228 deletions
diff --git a/drivers/lightnvm/pblk-rl.c b/drivers/lightnvm/pblk-rl.c
deleted file mode 100644
index 2e6a5361baf0..000000000000
--- a/drivers/lightnvm/pblk-rl.c
+++ /dev/null
@@ -1,228 +0,0 @@
-/*
- * 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-rl.c - pblk's rate limiter for user I/O
- *
- */
-
-#include "pblk.h"
-
-static void pblk_rl_kick_u_timer(struct pblk_rl *rl)
-{
-	mod_timer(&rl->u_timer, jiffies + msecs_to_jiffies(5000));
-}
-
-int pblk_rl_is_limit(struct pblk_rl *rl)
-{
-	int rb_space;
-
-	rb_space = atomic_read(&rl->rb_space);
-
-	return (rb_space == 0);
-}
-
-int pblk_rl_user_may_insert(struct pblk_rl *rl, int nr_entries)
-{
-	int rb_user_cnt = atomic_read(&rl->rb_user_cnt);
-	int rb_space = atomic_read(&rl->rb_space);
-
-	if (unlikely(rb_space >= 0) && (rb_space - nr_entries < 0))
-		return NVM_IO_ERR;
-
-	if (rb_user_cnt >= rl->rb_user_max)
-		return NVM_IO_REQUEUE;
-
-	return NVM_IO_OK;
-}
-
-void pblk_rl_inserted(struct pblk_rl *rl, int nr_entries)
-{
-	int rb_space = atomic_read(&rl->rb_space);
-
-	if (unlikely(rb_space >= 0))
-		atomic_sub(nr_entries, &rl->rb_space);
-}
-
-int pblk_rl_gc_may_insert(struct pblk_rl *rl, int nr_entries)
-{
-	int rb_gc_cnt = atomic_read(&rl->rb_gc_cnt);
-	int rb_user_active;
-
-	/* If there is no user I/O let GC take over space on the write buffer */
-	rb_user_active = READ_ONCE(rl->rb_user_active);
-	return (!(rb_gc_cnt >= rl->rb_gc_max && rb_user_active));
-}
-
-void pblk_rl_user_in(struct pblk_rl *rl, int nr_entries)
-{
-	atomic_add(nr_entries, &rl->rb_user_cnt);
-
-	/* Release user I/O state. Protect from GC */
-	smp_store_release(&rl->rb_user_active, 1);
-	pblk_rl_kick_u_timer(rl);
-}
-
-void pblk_rl_gc_in(struct pblk_rl *rl, int nr_entries)
-{
-	atomic_add(nr_entries, &rl->rb_gc_cnt);
-}
-
-void pblk_rl_out(struct pblk_rl *rl, int nr_user, int nr_gc)
-{
-	atomic_sub(nr_user, &rl->rb_user_cnt);
-	atomic_sub(nr_gc, &rl->rb_gc_cnt);
-}
-
-unsigned long pblk_rl_nr_free_blks(struct pblk_rl *rl)
-{
-	return atomic_read(&rl->free_blocks);
-}
-
-/*
- * We check for (i) the number of free blocks in the current LUN and (ii) the
- * total number of free blocks in the pblk instance. This is to even out the
- * number of free blocks on each LUN when GC kicks in.
- *
- * 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)
-{
-	unsigned long free_blocks = pblk_rl_nr_free_blks(rl);
-
-	if (free_blocks >= rl->high) {
-		rl->rb_user_max = max;
-		rl->rb_gc_max = 0;
-		rl->rb_state = PBLK_RL_HIGH;
-	} else if (free_blocks < rl->high) {
-		int shift = rl->high_pw - rl->rb_windows_pw;
-		int user_windows = free_blocks >> shift;
-		int user_max = user_windows << PBLK_MAX_REQ_ADDRS_PW;
-
-		rl->rb_user_max = user_max;
-		rl->rb_gc_max = max - user_max;
-
-		if (free_blocks <= rl->rsv_blocks) {
-			rl->rb_user_max = 0;
-			rl->rb_gc_max = max;
-		}
-
-		/* In the worst case, we will need to GC lines in the low list
-		 * (high valid sector count). If there are lines to GC on high
-		 * or mid lists, these will be prioritized
-		 */
-		rl->rb_state = PBLK_RL_LOW;
-	}
-
-	return rl->rb_state;
-}
-
-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);
-}
-
-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);
-}
-
-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)
-{
-	return rl->rb_user_max;
-}
-
-static void pblk_rl_u_timer(unsigned long data)
-{
-	struct pblk_rl *rl = (struct pblk_rl *)data;
-
-	/* Release user I/O state. Protect from GC */
-	smp_store_release(&rl->rb_user_active, 0);
-}
-
-void pblk_rl_free(struct pblk_rl *rl)
-{
-	del_timer(&rl->u_timer);
-}
-
-void pblk_rl_init(struct pblk_rl *rl, int budget)
-{
-	struct pblk *pblk = container_of(rl, struct pblk, rl);
-	struct pblk_line_meta *lm = &pblk->lm;
-	int min_blocks = lm->blk_per_line * PBLK_GC_RSV_LINE;
-	unsigned int rb_windows;
-
-	rl->high = rl->total_blocks / PBLK_USER_HIGH_THRS;
-	rl->high_pw = get_count_order(rl->high);
-
-	rl->low = rl->total_blocks / PBLK_USER_LOW_THRS;
-	if (rl->low < min_blocks)
-		rl->low = min_blocks;
-
-	rl->rsv_blocks = min_blocks;
-
-	/* This will always be a power-of-2 */
-	rb_windows = budget / PBLK_MAX_REQ_ADDRS;
-	rl->rb_windows_pw = get_count_order(rb_windows);
-
-	/* To start with, all buffer is available to user I/O writers */
-	rl->rb_budget = budget;
-	rl->rb_user_max = budget;
-	rl->rb_gc_max = 0;
-	rl->rb_state = PBLK_RL_HIGH;
-
-	atomic_set(&rl->rb_user_cnt, 0);
-	atomic_set(&rl->rb_gc_cnt, 0);
-	atomic_set(&rl->rb_space, -1);
-
-	setup_timer(&rl->u_timer, pblk_rl_u_timer, (unsigned long)rl);
-
-	rl->rb_user_active = 0;
-	rl->rb_gc_active = 0;
-}