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| author | Steffen Klassert <steffen.klassert@secunet.com> | 2010-01-06 19:47:10 +1100 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2010-01-06 19:47:10 +1100 |
| commit | 16295bec6398a3eedc9377e1af6ff4c71b98c300 (patch) | |
| tree | 992d82d920b5e6b81fe08df58f8c2d677244f759 /include | |
| parent | 863b557a88f8c033f7419fabafef4712a5055f85 (diff) | |
| download | linux-16295bec6398a3eedc9377e1af6ff4c71b98c300.tar.bz2 | |
padata: Generic parallelization/serialization interface
This patch introduces an interface to process data objects
in parallel. The parallelized objects return after serialization
in the same order as they were before the parallelization.
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/padata.h | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/include/linux/padata.h b/include/linux/padata.h new file mode 100644 index 000000000000..51611da9c498 --- /dev/null +++ b/include/linux/padata.h @@ -0,0 +1,88 @@ +/* + * padata.h - header for the padata parallelization interface + * + * Copyright (C) 2008, 2009 secunet Security Networks AG + * Copyright (C) 2008, 2009 Steffen Klassert <steffen.klassert@secunet.com> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License along with + * this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#ifndef PADATA_H +#define PADATA_H + +#include <linux/workqueue.h> +#include <linux/spinlock.h> +#include <linux/list.h> + +struct padata_priv { + struct list_head list; + struct parallel_data *pd; + int cb_cpu; + int seq_nr; + int info; + void (*parallel)(struct padata_priv *padata); + void (*serial)(struct padata_priv *padata); +}; + +struct padata_list { + struct list_head list; + spinlock_t lock; +}; + +struct padata_queue { + struct padata_list parallel; + struct padata_list reorder; + struct padata_list serial; + struct work_struct pwork; + struct work_struct swork; + struct parallel_data *pd; + atomic_t num_obj; + int cpu_index; +}; + +struct parallel_data { + struct padata_instance *pinst; + struct padata_queue *queue; + atomic_t seq_nr; + atomic_t reorder_objects; + atomic_t refcnt; + unsigned int max_seq_nr; + cpumask_var_t cpumask; + spinlock_t lock; +}; + +struct padata_instance { + struct notifier_block cpu_notifier; + struct workqueue_struct *wq; + struct parallel_data *pd; + cpumask_var_t cpumask; + struct mutex lock; + u8 flags; +#define PADATA_INIT 1 +#define PADATA_RESET 2 +}; + +extern struct padata_instance *padata_alloc(const struct cpumask *cpumask, + struct workqueue_struct *wq); +extern void padata_free(struct padata_instance *pinst); +extern int padata_do_parallel(struct padata_instance *pinst, + struct padata_priv *padata, int cb_cpu); +extern void padata_do_serial(struct padata_priv *padata); +extern int padata_set_cpumask(struct padata_instance *pinst, + cpumask_var_t cpumask); +extern int padata_add_cpu(struct padata_instance *pinst, int cpu); +extern int padata_remove_cpu(struct padata_instance *pinst, int cpu); +extern void padata_start(struct padata_instance *pinst); +extern void padata_stop(struct padata_instance *pinst); +#endif |