Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * Copyright (C) 2016 CNEX Labs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  * Initial release: Javier Gonzalez <javier@cnexlabs.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  *                  Matias Bjorling <matias@cnexlabs.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  * This program is free software; you can redistribute it and/or
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  * modify it under the terms of the GNU General Public License version
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9)  * 2 as published by the Free Software Foundation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11)  * This program is distributed in the hope that it will be useful, but
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12)  * WITHOUT ANY WARRANTY; without even the implied warranty of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13)  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14)  * General Public License for more details.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16)  * pblk-rl.c - pblk's rate limiter for user I/O
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) #include "pblk.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) static void pblk_rl_kick_u_timer(struct pblk_rl *rl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) 	mod_timer(&rl->u_timer, jiffies + msecs_to_jiffies(5000));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) int pblk_rl_is_limit(struct pblk_rl *rl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 	int rb_space;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 	rb_space = atomic_read(&rl->rb_space);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 	return (rb_space == 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) int pblk_rl_user_may_insert(struct pblk_rl *rl, int nr_entries)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 	int rb_user_cnt = atomic_read(&rl->rb_user_cnt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 	int rb_space = atomic_read(&rl->rb_space);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 	if (unlikely(rb_space >= 0) && (rb_space - nr_entries < 0))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 		return NVM_IO_ERR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 	if (rb_user_cnt >= rl->rb_user_max)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 		return NVM_IO_REQUEUE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	return NVM_IO_OK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) void pblk_rl_inserted(struct pblk_rl *rl, int nr_entries)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	int rb_space = atomic_read(&rl->rb_space);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	if (unlikely(rb_space >= 0))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 		atomic_sub(nr_entries, &rl->rb_space);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) int pblk_rl_gc_may_insert(struct pblk_rl *rl, int nr_entries)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 	int rb_gc_cnt = atomic_read(&rl->rb_gc_cnt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 	int rb_user_active;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 	/* If there is no user I/O let GC take over space on the write buffer */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 	rb_user_active = READ_ONCE(rl->rb_user_active);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	return (!(rb_gc_cnt >= rl->rb_gc_max && rb_user_active));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) void pblk_rl_user_in(struct pblk_rl *rl, int nr_entries)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 	atomic_add(nr_entries, &rl->rb_user_cnt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 	/* Release user I/O state. Protect from GC */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 	smp_store_release(&rl->rb_user_active, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 	pblk_rl_kick_u_timer(rl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) void pblk_rl_werr_line_in(struct pblk_rl *rl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 	atomic_inc(&rl->werr_lines);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) void pblk_rl_werr_line_out(struct pblk_rl *rl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 	atomic_dec(&rl->werr_lines);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) void pblk_rl_gc_in(struct pblk_rl *rl, int nr_entries)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 	atomic_add(nr_entries, &rl->rb_gc_cnt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) void pblk_rl_out(struct pblk_rl *rl, int nr_user, int nr_gc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 	atomic_sub(nr_user, &rl->rb_user_cnt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 	atomic_sub(nr_gc, &rl->rb_gc_cnt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) unsigned long pblk_rl_nr_free_blks(struct pblk_rl *rl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 	return atomic_read(&rl->free_blocks);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) unsigned long pblk_rl_nr_user_free_blks(struct pblk_rl *rl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 	return atomic_read(&rl->free_user_blocks);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) static void __pblk_rl_update_rates(struct pblk_rl *rl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 				   unsigned long free_blocks)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 	struct pblk *pblk = container_of(rl, struct pblk, rl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 	int max = rl->rb_budget;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 	int werr_gc_needed = atomic_read(&rl->werr_lines);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 	if (free_blocks >= rl->high) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 		if (werr_gc_needed) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 			/* Allocate a small budget for recovering
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 			 * lines with write errors
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 			 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 			rl->rb_gc_max = 1 << rl->rb_windows_pw;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 			rl->rb_user_max = max - rl->rb_gc_max;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 			rl->rb_state = PBLK_RL_WERR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 		} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 			rl->rb_user_max = max;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 			rl->rb_gc_max = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 			rl->rb_state = PBLK_RL_OFF;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 	} else if (free_blocks < rl->high) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 		int shift = rl->high_pw - rl->rb_windows_pw;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 		int user_windows = free_blocks >> shift;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 		int user_max = user_windows << ilog2(NVM_MAX_VLBA);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 		rl->rb_user_max = user_max;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 		rl->rb_gc_max = max - user_max;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 		if (free_blocks <= rl->rsv_blocks) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 			rl->rb_user_max = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 			rl->rb_gc_max = max;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 		/* In the worst case, we will need to GC lines in the low list
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 		 * (high valid sector count). If there are lines to GC on high
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 		 * or mid lists, these will be prioritized
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 		rl->rb_state = PBLK_RL_LOW;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 	if (rl->rb_state != PBLK_RL_OFF)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 		pblk_gc_should_start(pblk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 		pblk_gc_should_stop(pblk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) void pblk_rl_update_rates(struct pblk_rl *rl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 	__pblk_rl_update_rates(rl, pblk_rl_nr_user_free_blks(rl));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) void pblk_rl_free_lines_inc(struct pblk_rl *rl, struct pblk_line *line)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 	int blk_in_line = atomic_read(&line->blk_in_line);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 	int free_blocks;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 	atomic_add(blk_in_line, &rl->free_blocks);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 	free_blocks = atomic_add_return(blk_in_line, &rl->free_user_blocks);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 	__pblk_rl_update_rates(rl, free_blocks);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) void pblk_rl_free_lines_dec(struct pblk_rl *rl, struct pblk_line *line,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 			    bool used)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 	int blk_in_line = atomic_read(&line->blk_in_line);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 	int free_blocks;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 	atomic_sub(blk_in_line, &rl->free_blocks);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 	if (used)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 		free_blocks = atomic_sub_return(blk_in_line,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 							&rl->free_user_blocks);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 		free_blocks = atomic_read(&rl->free_user_blocks);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 	__pblk_rl_update_rates(rl, free_blocks);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) int pblk_rl_high_thrs(struct pblk_rl *rl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 	return rl->high;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) int pblk_rl_max_io(struct pblk_rl *rl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 	return rl->rb_max_io;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) static void pblk_rl_u_timer(struct timer_list *t)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 	struct pblk_rl *rl = from_timer(rl, t, u_timer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 	/* Release user I/O state. Protect from GC */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 	smp_store_release(&rl->rb_user_active, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) void pblk_rl_free(struct pblk_rl *rl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 	del_timer(&rl->u_timer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) void pblk_rl_init(struct pblk_rl *rl, int budget, int threshold)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 	struct pblk *pblk = container_of(rl, struct pblk, rl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 	struct nvm_tgt_dev *dev = pblk->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 	struct nvm_geo *geo = &dev->geo;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 	struct pblk_line_mgmt *l_mg = &pblk->l_mg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 	struct pblk_line_meta *lm = &pblk->lm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 	int sec_meta, blk_meta;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 	unsigned int rb_windows;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 	/* Consider sectors used for metadata */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 	sec_meta = (lm->smeta_sec + lm->emeta_sec[0]) * l_mg->nr_free_lines;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 	blk_meta = DIV_ROUND_UP(sec_meta, geo->clba);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 	rl->high = pblk->op_blks - blk_meta - lm->blk_per_line;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 	rl->high_pw = get_count_order(rl->high);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 	rl->rsv_blocks = pblk_get_min_chks(pblk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 	/* This will always be a power-of-2 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 	rb_windows = budget / NVM_MAX_VLBA;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 	rl->rb_windows_pw = get_count_order(rb_windows);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 	/* To start with, all buffer is available to user I/O writers */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 	rl->rb_budget = budget;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 	rl->rb_user_max = budget;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 	rl->rb_gc_max = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 	rl->rb_state = PBLK_RL_HIGH;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 	/* Maximize I/O size and ansure that back threshold is respected */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 	if (threshold)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 		rl->rb_max_io = budget - pblk->min_write_pgs_data - threshold;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 		rl->rb_max_io = budget - pblk->min_write_pgs_data - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 	atomic_set(&rl->rb_user_cnt, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 	atomic_set(&rl->rb_gc_cnt, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 	atomic_set(&rl->rb_space, -1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 	atomic_set(&rl->werr_lines, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 	timer_setup(&rl->u_timer, pblk_rl_u_timer, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 	rl->rb_user_active = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 	rl->rb_gc_active = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) }