| Steffen Klassert | 16295be | 2010-01-06 19:47:10 +1100 | [diff] [blame] | 1 | /* |
| 2 | * padata.h - header for the padata parallelization interface |
| 3 | * |
| 4 | * Copyright (C) 2008, 2009 secunet Security Networks AG |
| 5 | * Copyright (C) 2008, 2009 Steffen Klassert <steffen.klassert@secunet.com> |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify it |
| 8 | * under the terms and conditions of the GNU General Public License, |
| 9 | * version 2, as published by the Free Software Foundation. |
| 10 | * |
| 11 | * This program is distributed in the hope it will be useful, but WITHOUT |
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| 14 | * more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License along with |
| 17 | * this program; if not, write to the Free Software Foundation, Inc., |
| 18 | * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. |
| 19 | */ |
| 20 | |
| 21 | #ifndef PADATA_H |
| 22 | #define PADATA_H |
| 23 | |
| 24 | #include <linux/workqueue.h> |
| 25 | #include <linux/spinlock.h> |
| 26 | #include <linux/list.h> |
| 27 | |
| 28 | struct padata_priv { |
| 29 | struct list_head list; |
| 30 | struct parallel_data *pd; |
| 31 | int cb_cpu; |
| 32 | int seq_nr; |
| 33 | int info; |
| 34 | void (*parallel)(struct padata_priv *padata); |
| 35 | void (*serial)(struct padata_priv *padata); |
| 36 | }; |
| 37 | |
| 38 | struct padata_list { |
| 39 | struct list_head list; |
| 40 | spinlock_t lock; |
| 41 | }; |
| 42 | |
| 43 | struct padata_queue { |
| 44 | struct padata_list parallel; |
| 45 | struct padata_list reorder; |
| 46 | struct padata_list serial; |
| 47 | struct work_struct pwork; |
| 48 | struct work_struct swork; |
| 49 | struct parallel_data *pd; |
| 50 | atomic_t num_obj; |
| 51 | int cpu_index; |
| 52 | }; |
| 53 | |
| 54 | struct parallel_data { |
| 55 | struct padata_instance *pinst; |
| 56 | struct padata_queue *queue; |
| 57 | atomic_t seq_nr; |
| 58 | atomic_t reorder_objects; |
| 59 | atomic_t refcnt; |
| 60 | unsigned int max_seq_nr; |
| 61 | cpumask_var_t cpumask; |
| 62 | spinlock_t lock; |
| 63 | }; |
| 64 | |
| 65 | struct padata_instance { |
| 66 | struct notifier_block cpu_notifier; |
| 67 | struct workqueue_struct *wq; |
| 68 | struct parallel_data *pd; |
| 69 | cpumask_var_t cpumask; |
| 70 | struct mutex lock; |
| 71 | u8 flags; |
| 72 | #define PADATA_INIT 1 |
| 73 | #define PADATA_RESET 2 |
| 74 | }; |
| 75 | |
| 76 | extern struct padata_instance *padata_alloc(const struct cpumask *cpumask, |
| 77 | struct workqueue_struct *wq); |
| 78 | extern void padata_free(struct padata_instance *pinst); |
| 79 | extern int padata_do_parallel(struct padata_instance *pinst, |
| 80 | struct padata_priv *padata, int cb_cpu); |
| 81 | extern void padata_do_serial(struct padata_priv *padata); |
| 82 | extern int padata_set_cpumask(struct padata_instance *pinst, |
| 83 | cpumask_var_t cpumask); |
| 84 | extern int padata_add_cpu(struct padata_instance *pinst, int cpu); |
| 85 | extern int padata_remove_cpu(struct padata_instance *pinst, int cpu); |
| 86 | extern void padata_start(struct padata_instance *pinst); |
| 87 | extern void padata_stop(struct padata_instance *pinst); |
| 88 | #endif |