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| 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 <[email protected]> |
| 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 |
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