22 static void pblk_rl_kick_u_timer(struct pblk_rl *rl)  in pblk_rl_kick_u_timer()  argument
24 	mod_timer(&rl->u_timer, jiffies + msecs_to_jiffies(5000));  in pblk_rl_kick_u_timer()
27 int pblk_rl_is_limit(struct pblk_rl *rl)  in pblk_rl_is_limit()  argument
31 	rb_space = atomic_read(&rl->rb_space);  in pblk_rl_is_limit()
36 int pblk_rl_user_may_insert(struct pblk_rl *rl, int nr_entries)  in pblk_rl_user_may_insert()  argument
38 	int rb_user_cnt = atomic_read(&rl->rb_user_cnt);  in pblk_rl_user_may_insert()
39 	int rb_space = atomic_read(&rl->rb_space);  in pblk_rl_user_may_insert()
44 	if (rb_user_cnt >= rl->rb_user_max)  in pblk_rl_user_may_insert()
50 void pblk_rl_inserted(struct pblk_rl *rl, int nr_entries)  in pblk_rl_inserted()  argument
52 	int rb_space = atomic_read(&rl->rb_space);  in pblk_rl_inserted()
55 		atomic_sub(nr_entries, &rl->rb_space);  in pblk_rl_inserted()
58 int pblk_rl_gc_may_insert(struct pblk_rl *rl, int nr_entries)  in pblk_rl_gc_may_insert()  argument
60 	int rb_gc_cnt = atomic_read(&rl->rb_gc_cnt);  in pblk_rl_gc_may_insert()
64 	rb_user_active = READ_ONCE(rl->rb_user_active);  in pblk_rl_gc_may_insert()
65 	return (!(rb_gc_cnt >= rl->rb_gc_max && rb_user_active));  in pblk_rl_gc_may_insert()
68 void pblk_rl_user_in(struct pblk_rl *rl, int nr_entries)  in pblk_rl_user_in()  argument
70 	atomic_add(nr_entries, &rl->rb_user_cnt);  in pblk_rl_user_in()
73 	smp_store_release(&rl->rb_user_active, 1);  in pblk_rl_user_in()
74 	pblk_rl_kick_u_timer(rl);  in pblk_rl_user_in()
77 void pblk_rl_werr_line_in(struct pblk_rl *rl)  in pblk_rl_werr_line_in()  argument
79 	atomic_inc(&rl->werr_lines);  in pblk_rl_werr_line_in()
82 void pblk_rl_werr_line_out(struct pblk_rl *rl)  in pblk_rl_werr_line_out()  argument
84 	atomic_dec(&rl->werr_lines);  in pblk_rl_werr_line_out()
87 void pblk_rl_gc_in(struct pblk_rl *rl, int nr_entries)  in pblk_rl_gc_in()  argument
89 	atomic_add(nr_entries, &rl->rb_gc_cnt);  in pblk_rl_gc_in()
92 void pblk_rl_out(struct pblk_rl *rl, int nr_user, int nr_gc)  in pblk_rl_out()  argument
94 	atomic_sub(nr_user, &rl->rb_user_cnt);  in pblk_rl_out()
95 	atomic_sub(nr_gc, &rl->rb_gc_cnt);  in pblk_rl_out()
98 unsigned long pblk_rl_nr_free_blks(struct pblk_rl *rl)  in pblk_rl_nr_free_blks()  argument
100 	return atomic_read(&rl->free_blocks);  in pblk_rl_nr_free_blks()
103 unsigned long pblk_rl_nr_user_free_blks(struct pblk_rl *rl)  in pblk_rl_nr_user_free_blks()  argument
105 	return atomic_read(&rl->free_user_blocks);  in pblk_rl_nr_user_free_blks()
108 static void __pblk_rl_update_rates(struct pblk_rl *rl,  in __pblk_rl_update_rates()  argument
111 	struct pblk *pblk = container_of(rl, struct pblk, rl);  in __pblk_rl_update_rates()
112 	int max = rl->rb_budget;  in __pblk_rl_update_rates()
113 	int werr_gc_needed = atomic_read(&rl->werr_lines);  in __pblk_rl_update_rates()
115 	if (free_blocks >= rl->high) {  in __pblk_rl_update_rates()
120 			rl->rb_gc_max = 1 << rl->rb_windows_pw;  in __pblk_rl_update_rates()
121 			rl->rb_user_max = max - rl->rb_gc_max;  in __pblk_rl_update_rates()
122 			rl->rb_state = PBLK_RL_WERR;  in __pblk_rl_update_rates()
124 			rl->rb_user_max = max;  in __pblk_rl_update_rates()
125 			rl->rb_gc_max = 0;  in __pblk_rl_update_rates()
126 			rl->rb_state = PBLK_RL_OFF;  in __pblk_rl_update_rates()
128 	} else if (free_blocks < rl->high) {  in __pblk_rl_update_rates()
129 		int shift = rl->high_pw - rl->rb_windows_pw;  in __pblk_rl_update_rates()
133 		rl->rb_user_max = user_max;  in __pblk_rl_update_rates()
134 		rl->rb_gc_max = max - user_max;  in __pblk_rl_update_rates()
136 		if (free_blocks <= rl->rsv_blocks) {  in __pblk_rl_update_rates()
137 			rl->rb_user_max = 0;  in __pblk_rl_update_rates()
138 			rl->rb_gc_max = max;  in __pblk_rl_update_rates()
145 		rl->rb_state = PBLK_RL_LOW;  in __pblk_rl_update_rates()
148 	if (rl->rb_state != PBLK_RL_OFF)  in __pblk_rl_update_rates()
154 void pblk_rl_update_rates(struct pblk_rl *rl)  in pblk_rl_update_rates()  argument
156 	__pblk_rl_update_rates(rl, pblk_rl_nr_user_free_blks(rl));  in pblk_rl_update_rates()
159 void pblk_rl_free_lines_inc(struct pblk_rl *rl, struct pblk_line *line)  in pblk_rl_free_lines_inc()  argument
164 	atomic_add(blk_in_line, &rl->free_blocks);  in pblk_rl_free_lines_inc()
165 	free_blocks = atomic_add_return(blk_in_line, &rl->free_user_blocks);  in pblk_rl_free_lines_inc()
167 	__pblk_rl_update_rates(rl, free_blocks);  in pblk_rl_free_lines_inc()
170 void pblk_rl_free_lines_dec(struct pblk_rl *rl, struct pblk_line *line,  in pblk_rl_free_lines_dec()  argument
176 	atomic_sub(blk_in_line, &rl->free_blocks);  in pblk_rl_free_lines_dec()
180 							&rl->free_user_blocks);  in pblk_rl_free_lines_dec()
182 		free_blocks = atomic_read(&rl->free_user_blocks);  in pblk_rl_free_lines_dec()
184 	__pblk_rl_update_rates(rl, free_blocks);  in pblk_rl_free_lines_dec()
187 int pblk_rl_high_thrs(struct pblk_rl *rl)  in pblk_rl_high_thrs()  argument
189 	return rl->high;  in pblk_rl_high_thrs()
192 int pblk_rl_max_io(struct pblk_rl *rl)  in pblk_rl_max_io()  argument
194 	return rl->rb_max_io;  in pblk_rl_max_io()
199 	struct pblk_rl *rl = from_timer(rl, t, u_timer);  in pblk_rl_u_timer()  local
202 	smp_store_release(&rl->rb_user_active, 0);  in pblk_rl_u_timer()
205 void pblk_rl_free(struct pblk_rl *rl)  in pblk_rl_free()  argument
207 	del_timer(&rl->u_timer);  in pblk_rl_free()
210 void pblk_rl_init(struct pblk_rl *rl, int budget, int threshold)  in pblk_rl_init()  argument
212 	struct pblk *pblk = container_of(rl, struct pblk, rl);  in pblk_rl_init()
224 	rl->high = pblk->op_blks - blk_meta - lm->blk_per_line;  in pblk_rl_init()
225 	rl->high_pw = get_count_order(rl->high);  in pblk_rl_init()
227 	rl->rsv_blocks = pblk_get_min_chks(pblk);  in pblk_rl_init()
231 	rl->rb_windows_pw = get_count_order(rb_windows);  in pblk_rl_init()
234 	rl->rb_budget = budget;  in pblk_rl_init()
235 	rl->rb_user_max = budget;  in pblk_rl_init()
236 	rl->rb_gc_max = 0;  in pblk_rl_init()
237 	rl->rb_state = PBLK_RL_HIGH;  in pblk_rl_init()
241 		rl->rb_max_io = budget - pblk->min_write_pgs_data - threshold;  in pblk_rl_init()
243 		rl->rb_max_io = budget - pblk->min_write_pgs_data - 1;  in pblk_rl_init()
245 	atomic_set(&rl->rb_user_cnt, 0);  in pblk_rl_init()
246 	atomic_set(&rl->rb_gc_cnt, 0);  in pblk_rl_init()
247 	atomic_set(&rl->rb_space, -1);  in pblk_rl_init()
248 	atomic_set(&rl->werr_lines, 0);  in pblk_rl_init()
250 	timer_setup(&rl->u_timer, pblk_rl_u_timer, 0);  in pblk_rl_init()
252 	rl->rb_user_active = 0;  in pblk_rl_init()
253 	rl->rb_gc_active = 0;  in pblk_rl_init()