21 static void pblk_rl_kick_u_timer(struct pblk_rl *rl)  in pblk_rl_kick_u_timer()  argument
23 	mod_timer(&rl->u_timer, jiffies + msecs_to_jiffies(5000));  in pblk_rl_kick_u_timer()
26 int pblk_rl_is_limit(struct pblk_rl *rl)  in pblk_rl_is_limit()  argument
30 	rb_space = atomic_read(&rl->rb_space);  in pblk_rl_is_limit()
35 int pblk_rl_user_may_insert(struct pblk_rl *rl, int nr_entries)  in pblk_rl_user_may_insert()  argument
37 	int rb_user_cnt = atomic_read(&rl->rb_user_cnt);  in pblk_rl_user_may_insert()
38 	int rb_space = atomic_read(&rl->rb_space);  in pblk_rl_user_may_insert()
43 	if (rb_user_cnt >= rl->rb_user_max)  in pblk_rl_user_may_insert()
49 void pblk_rl_inserted(struct pblk_rl *rl, int nr_entries)  in pblk_rl_inserted()  argument
51 	int rb_space = atomic_read(&rl->rb_space);  in pblk_rl_inserted()
54 		atomic_sub(nr_entries, &rl->rb_space);  in pblk_rl_inserted()
57 int pblk_rl_gc_may_insert(struct pblk_rl *rl, int nr_entries)  in pblk_rl_gc_may_insert()  argument
59 	int rb_gc_cnt = atomic_read(&rl->rb_gc_cnt);  in pblk_rl_gc_may_insert()
63 	rb_user_active = READ_ONCE(rl->rb_user_active);  in pblk_rl_gc_may_insert()
64 	return (!(rb_gc_cnt >= rl->rb_gc_max && rb_user_active));  in pblk_rl_gc_may_insert()
67 void pblk_rl_user_in(struct pblk_rl *rl, int nr_entries)  in pblk_rl_user_in()  argument
69 	atomic_add(nr_entries, &rl->rb_user_cnt);  in pblk_rl_user_in()
72 	smp_store_release(&rl->rb_user_active, 1);  in pblk_rl_user_in()
73 	pblk_rl_kick_u_timer(rl);  in pblk_rl_user_in()
76 void pblk_rl_werr_line_in(struct pblk_rl *rl)  in pblk_rl_werr_line_in()  argument
78 	atomic_inc(&rl->werr_lines);  in pblk_rl_werr_line_in()
81 void pblk_rl_werr_line_out(struct pblk_rl *rl)  in pblk_rl_werr_line_out()  argument
83 	atomic_dec(&rl->werr_lines);  in pblk_rl_werr_line_out()
86 void pblk_rl_gc_in(struct pblk_rl *rl, int nr_entries)  in pblk_rl_gc_in()  argument
88 	atomic_add(nr_entries, &rl->rb_gc_cnt);  in pblk_rl_gc_in()
91 void pblk_rl_out(struct pblk_rl *rl, int nr_user, int nr_gc)  in pblk_rl_out()  argument
93 	atomic_sub(nr_user, &rl->rb_user_cnt);  in pblk_rl_out()
94 	atomic_sub(nr_gc, &rl->rb_gc_cnt);  in pblk_rl_out()
97 unsigned long pblk_rl_nr_free_blks(struct pblk_rl *rl)  in pblk_rl_nr_free_blks()  argument
99 	return atomic_read(&rl->free_blocks);  in pblk_rl_nr_free_blks()
102 unsigned long pblk_rl_nr_user_free_blks(struct pblk_rl *rl)  in pblk_rl_nr_user_free_blks()  argument
104 	return atomic_read(&rl->free_user_blocks);  in pblk_rl_nr_user_free_blks()
107 static void __pblk_rl_update_rates(struct pblk_rl *rl,  in __pblk_rl_update_rates()  argument
110 	struct pblk *pblk = container_of(rl, struct pblk, rl);  in __pblk_rl_update_rates()
111 	int max = rl->rb_budget;  in __pblk_rl_update_rates()
112 	int werr_gc_needed = atomic_read(&rl->werr_lines);  in __pblk_rl_update_rates()
114 	if (free_blocks >= rl->high) {  in __pblk_rl_update_rates()
119 			rl->rb_gc_max = 1 << rl->rb_windows_pw;  in __pblk_rl_update_rates()
120 			rl->rb_user_max = max - rl->rb_gc_max;  in __pblk_rl_update_rates()
121 			rl->rb_state = PBLK_RL_WERR;  in __pblk_rl_update_rates()
123 			rl->rb_user_max = max;  in __pblk_rl_update_rates()
124 			rl->rb_gc_max = 0;  in __pblk_rl_update_rates()
125 			rl->rb_state = PBLK_RL_OFF;  in __pblk_rl_update_rates()
127 	} else if (free_blocks < rl->high) {  in __pblk_rl_update_rates()
128 		int shift = rl->high_pw - rl->rb_windows_pw;  in __pblk_rl_update_rates()
132 		rl->rb_user_max = user_max;  in __pblk_rl_update_rates()
133 		rl->rb_gc_max = max - user_max;  in __pblk_rl_update_rates()
135 		if (free_blocks <= rl->rsv_blocks) {  in __pblk_rl_update_rates()
136 			rl->rb_user_max = 0;  in __pblk_rl_update_rates()
137 			rl->rb_gc_max = max;  in __pblk_rl_update_rates()
144 		rl->rb_state = PBLK_RL_LOW;  in __pblk_rl_update_rates()
147 	if (rl->rb_state != PBLK_RL_OFF)  in __pblk_rl_update_rates()
153 void pblk_rl_update_rates(struct pblk_rl *rl)  in pblk_rl_update_rates()  argument
155 	__pblk_rl_update_rates(rl, pblk_rl_nr_user_free_blks(rl));  in pblk_rl_update_rates()
158 void pblk_rl_free_lines_inc(struct pblk_rl *rl, struct pblk_line *line)  in pblk_rl_free_lines_inc()  argument
163 	atomic_add(blk_in_line, &rl->free_blocks);  in pblk_rl_free_lines_inc()
164 	free_blocks = atomic_add_return(blk_in_line, &rl->free_user_blocks);  in pblk_rl_free_lines_inc()
166 	__pblk_rl_update_rates(rl, free_blocks);  in pblk_rl_free_lines_inc()
169 void pblk_rl_free_lines_dec(struct pblk_rl *rl, struct pblk_line *line,  in pblk_rl_free_lines_dec()  argument
175 	atomic_sub(blk_in_line, &rl->free_blocks);  in pblk_rl_free_lines_dec()
179 							&rl->free_user_blocks);  in pblk_rl_free_lines_dec()
181 		free_blocks = atomic_read(&rl->free_user_blocks);  in pblk_rl_free_lines_dec()
183 	__pblk_rl_update_rates(rl, free_blocks);  in pblk_rl_free_lines_dec()
186 int pblk_rl_high_thrs(struct pblk_rl *rl)  in pblk_rl_high_thrs()  argument
188 	return rl->high;  in pblk_rl_high_thrs()
191 int pblk_rl_max_io(struct pblk_rl *rl)  in pblk_rl_max_io()  argument
193 	return rl->rb_max_io;  in pblk_rl_max_io()
198 	struct pblk_rl *rl = from_timer(rl, t, u_timer);  in pblk_rl_u_timer()  local
201 	smp_store_release(&rl->rb_user_active, 0);  in pblk_rl_u_timer()
204 void pblk_rl_free(struct pblk_rl *rl)  in pblk_rl_free()  argument
206 	del_timer(&rl->u_timer);  in pblk_rl_free()
209 void pblk_rl_init(struct pblk_rl *rl, int budget)  in pblk_rl_init()  argument
211 	struct pblk *pblk = container_of(rl, struct pblk, rl);  in pblk_rl_init()
225 	rl->high = pblk->op_blks - blk_meta - lm->blk_per_line;  in pblk_rl_init()
226 	rl->high_pw = get_count_order(rl->high);  in pblk_rl_init()
228 	rl->rsv_blocks = min_blocks;  in pblk_rl_init()
232 	rl->rb_windows_pw = get_count_order(rb_windows);  in pblk_rl_init()
235 	rl->rb_budget = budget;  in pblk_rl_init()
236 	rl->rb_user_max = budget;  in pblk_rl_init()
237 	rl->rb_max_io = budget >> 1;  in pblk_rl_init()
238 	rl->rb_gc_max = 0;  in pblk_rl_init()
239 	rl->rb_state = PBLK_RL_HIGH;  in pblk_rl_init()
241 	atomic_set(&rl->rb_user_cnt, 0);  in pblk_rl_init()
242 	atomic_set(&rl->rb_gc_cnt, 0);  in pblk_rl_init()
243 	atomic_set(&rl->rb_space, -1);  in pblk_rl_init()
244 	atomic_set(&rl->werr_lines, 0);  in pblk_rl_init()
246 	timer_setup(&rl->u_timer, pblk_rl_u_timer, 0);  in pblk_rl_init()
248 	rl->rb_user_active = 0;  in pblk_rl_init()
249 	rl->rb_gc_active = 0;  in pblk_rl_init()