diff options
Diffstat (limited to 'include/linux/padata.h')
| -rw-r--r-- | include/linux/padata.h | 121 |
1 files changed, 85 insertions, 36 deletions
diff --git a/include/linux/padata.h b/include/linux/padata.h index 8d8406246eef..bdcd1e9eacea 100644 --- a/include/linux/padata.h +++ b/include/linux/padata.h @@ -25,6 +25,11 @@ #include <linux/spinlock.h> #include <linux/list.h> #include <linux/timer.h> +#include <linux/notifier.h> +#include <linux/kobject.h> + +#define PADATA_CPU_SERIAL 0x01 +#define PADATA_CPU_PARALLEL 0x02 /** * struct padata_priv - Embedded to the users data structure. @@ -59,7 +64,20 @@ struct padata_list { }; /** - * struct padata_queue - The percpu padata queues. +* struct padata_serial_queue - The percpu padata serial queue +* +* @serial: List to wait for serialization after reordering. +* @work: work struct for serialization. +* @pd: Backpointer to the internal control structure. +*/ +struct padata_serial_queue { + struct padata_list serial; + struct work_struct work; + struct parallel_data *pd; +}; + +/** + * struct padata_parallel_queue - The percpu padata parallel queue * * @parallel: List to wait for parallelization. * @reorder: List to wait for reordering after parallel processing. @@ -67,18 +85,28 @@ struct padata_list { * @pwork: work struct for parallelization. * @swork: work struct for serialization. * @pd: Backpointer to the internal control structure. + * @work: work struct for parallelization. * @num_obj: Number of objects that are processed by this cpu. * @cpu_index: Index of the cpu. */ -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 padata_parallel_queue { + struct padata_list parallel; + struct padata_list reorder; + struct parallel_data *pd; + struct work_struct work; + atomic_t num_obj; + int cpu_index; +}; + +/** + * struct padata_cpumask - The cpumasks for the parallel/serial workers + * + * @pcpu: cpumask for the parallel workers. + * @cbcpu: cpumask for the serial (callback) workers. + */ +struct padata_cpumask { + cpumask_var_t pcpu; + cpumask_var_t cbcpu; }; /** @@ -86,25 +114,29 @@ struct padata_queue { * that depends on the cpumask in use. * * @pinst: padata instance. - * @queue: percpu padata queues. + * @pqueue: percpu padata queues used for parallelization. + * @squeue: percpu padata queues used for serialuzation. * @seq_nr: The sequence number that will be attached to the next object. * @reorder_objects: Number of objects waiting in the reorder queues. * @refcnt: Number of objects holding a reference on this parallel_data. * @max_seq_nr: Maximal used sequence number. - * @cpumask: cpumask in use. + * @cpumask: The cpumasks in use for parallel and serial workers. * @lock: Reorder lock. + * @processed: Number of already processed objects. * @timer: Reorder timer. */ 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 timer_list timer; + struct padata_instance *pinst; + struct padata_parallel_queue *pqueue; + struct padata_serial_queue *squeue; + atomic_t seq_nr; + atomic_t reorder_objects; + atomic_t refcnt; + unsigned int max_seq_nr; + struct padata_cpumask cpumask; + spinlock_t lock ____cacheline_aligned; + unsigned int processed; + struct timer_list timer; }; /** @@ -113,31 +145,48 @@ struct parallel_data { * @cpu_notifier: cpu hotplug notifier. * @wq: The workqueue in use. * @pd: The internal control structure. - * @cpumask: User supplied cpumask. + * @cpumask: User supplied cpumasks for parallel and serial works. + * @cpumask_change_notifier: Notifiers chain for user-defined notify + * callbacks that will be called when either @pcpu or @cbcpu + * or both cpumasks change. + * @kobj: padata instance kernel object. * @lock: padata instance lock. * @flags: padata flags. */ 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 + struct notifier_block cpu_notifier; + struct workqueue_struct *wq; + struct parallel_data *pd; + struct padata_cpumask cpumask; + struct blocking_notifier_head cpumask_change_notifier; + struct kobject kobj; + struct mutex lock; + u8 flags; +#define PADATA_INIT 1 +#define PADATA_RESET 2 +#define PADATA_INVALID 4 }; -extern struct padata_instance *padata_alloc(const struct cpumask *cpumask, - struct workqueue_struct *wq); +extern struct padata_instance *padata_alloc_possible( + struct workqueue_struct *wq); +extern struct padata_instance *padata_alloc(struct workqueue_struct *wq, + const struct cpumask *pcpumask, + const struct cpumask *cbcpumask); 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, +extern int padata_set_cpumask(struct padata_instance *pinst, int cpumask_type, 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 int padata_set_cpumasks(struct padata_instance *pinst, + cpumask_var_t pcpumask, + cpumask_var_t cbcpumask); +extern int padata_add_cpu(struct padata_instance *pinst, int cpu, int mask); +extern int padata_remove_cpu(struct padata_instance *pinst, int cpu, int mask); +extern int padata_start(struct padata_instance *pinst); extern void padata_stop(struct padata_instance *pinst); +extern int padata_register_cpumask_notifier(struct padata_instance *pinst, + struct notifier_block *nblock); +extern int padata_unregister_cpumask_notifier(struct padata_instance *pinst, + struct notifier_block *nblock); #endif |