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-rw-r--r--include/linux/padata.h116
1 files changed, 80 insertions, 36 deletions
diff --git a/include/linux/padata.h b/include/linux/padata.h
index 8844b851191e..621e7736690c 100644
--- a/include/linux/padata.h
+++ b/include/linux/padata.h
@@ -25,6 +25,10 @@
25#include <linux/spinlock.h> 25#include <linux/spinlock.h>
26#include <linux/list.h> 26#include <linux/list.h>
27#include <linux/timer.h> 27#include <linux/timer.h>
28#include <linux/notifier.h>
29
30#define PADATA_CPU_SERIAL 0x01
31#define PADATA_CPU_PARALLEL 0x02
28 32
29/** 33/**
30 * struct padata_priv - Embedded to the users data structure. 34 * struct padata_priv - Embedded to the users data structure.
@@ -59,7 +63,20 @@ struct padata_list {
59}; 63};
60 64
61/** 65/**
62 * struct padata_queue - The percpu padata queues. 66* struct padata_serial_queue - The percpu padata serial queue
67*
68* @serial: List to wait for serialization after reordering.
69* @work: work struct for serialization.
70* @pd: Backpointer to the internal control structure.
71*/
72struct padata_serial_queue {
73 struct padata_list serial;
74 struct work_struct work;
75 struct parallel_data *pd;
76};
77
78/**
79 * struct padata_parallel_queue - The percpu padata parallel queue
63 * 80 *
64 * @parallel: List to wait for parallelization. 81 * @parallel: List to wait for parallelization.
65 * @reorder: List to wait for reordering after parallel processing. 82 * @reorder: List to wait for reordering after parallel processing.
@@ -67,44 +84,52 @@ struct padata_list {
67 * @pwork: work struct for parallelization. 84 * @pwork: work struct for parallelization.
68 * @swork: work struct for serialization. 85 * @swork: work struct for serialization.
69 * @pd: Backpointer to the internal control structure. 86 * @pd: Backpointer to the internal control structure.
87 * @work: work struct for parallelization.
88 * @num_obj: Number of objects that are processed by this cpu.
70 * @cpu_index: Index of the cpu. 89 * @cpu_index: Index of the cpu.
71 */ 90 */
72struct padata_queue { 91struct padata_parallel_queue {
73 struct padata_list parallel; 92 struct padata_list parallel;
74 struct padata_list reorder; 93 struct padata_list reorder;
75 struct padata_list serial; 94 struct parallel_data *pd;
76 struct work_struct pwork; 95 struct work_struct work;
77 struct work_struct swork; 96 atomic_t num_obj;
78 struct parallel_data *pd; 97 int cpu_index;
79 int cpu_index;
80}; 98};
81 99
100
82/** 101/**
83 * struct parallel_data - Internal control structure, covers everything 102 * struct parallel_data - Internal control structure, covers everything
84 * that depends on the cpumask in use. 103 * that depends on the cpumask in use.
85 * 104 *
86 * @pinst: padata instance. 105 * @pinst: padata instance.
87 * @queue: percpu padata queues. 106 * @pqueue: percpu padata queues used for parallelization.
107 * @squeue: percpu padata queues used for serialuzation.
88 * @seq_nr: The sequence number that will be attached to the next object. 108 * @seq_nr: The sequence number that will be attached to the next object.
89 * @reorder_objects: Number of objects waiting in the reorder queues. 109 * @reorder_objects: Number of objects waiting in the reorder queues.
90 * @refcnt: Number of objects holding a reference on this parallel_data. 110 * @refcnt: Number of objects holding a reference on this parallel_data.
91 * @max_seq_nr: Maximal used sequence number. 111 * @max_seq_nr: Maximal used sequence number.
92 * @cpumask: cpumask in use. 112 * @cpumask: Contains two cpumasks: pcpu and cbcpu for
113 * parallel and serial workers respectively.
93 * @lock: Reorder lock. 114 * @lock: Reorder lock.
94 * @processed: Number of already processed objects. 115 * @processed: Number of already processed objects.
95 * @timer: Reorder timer. 116 * @timer: Reorder timer.
96 */ 117 */
97struct parallel_data { 118struct parallel_data {
98 struct padata_instance *pinst; 119 struct padata_instance *pinst;
99 struct padata_queue *queue; 120 struct padata_parallel_queue *pqueue;
100 atomic_t seq_nr; 121 struct padata_serial_queue *squeue;
101 atomic_t reorder_objects; 122 atomic_t seq_nr;
102 atomic_t refcnt; 123 atomic_t reorder_objects;
103 unsigned int max_seq_nr; 124 atomic_t refcnt;
104 cpumask_var_t cpumask; 125 unsigned int max_seq_nr;
105 spinlock_t lock ____cacheline_aligned; 126 struct {
106 unsigned int processed; 127 cpumask_var_t pcpu;
107 struct timer_list timer; 128 cpumask_var_t cbcpu;
129 } cpumask;
130 spinlock_t lock ____cacheline_aligned;
131 unsigned int processed;
132 struct timer_list timer;
108}; 133};
109 134
110/** 135/**
@@ -113,32 +138,51 @@ struct parallel_data {
113 * @cpu_notifier: cpu hotplug notifier. 138 * @cpu_notifier: cpu hotplug notifier.
114 * @wq: The workqueue in use. 139 * @wq: The workqueue in use.
115 * @pd: The internal control structure. 140 * @pd: The internal control structure.
116 * @cpumask: User supplied cpumask. 141 * @cpumask: User supplied cpumask. Contains two cpumasks: pcpu and
142 * cbcpu for parallel and serial works respectivly.
143 * @cpumask_change_notifier: Notifiers chain for user-defined notify
144 * callbacks that will be called when either @pcpu or @cbcpu
145 * or both cpumasks change.
117 * @lock: padata instance lock. 146 * @lock: padata instance lock.
118 * @flags: padata flags. 147 * @flags: padata flags.
119 */ 148 */
120struct padata_instance { 149struct padata_instance {
121 struct notifier_block cpu_notifier; 150 struct notifier_block cpu_notifier;
122 struct workqueue_struct *wq; 151 struct workqueue_struct *wq;
123 struct parallel_data *pd; 152 struct parallel_data *pd;
124 cpumask_var_t cpumask; 153 struct {
125 struct mutex lock; 154 cpumask_var_t pcpu;
126 u8 flags; 155 cpumask_var_t cbcpu;
127#define PADATA_INIT 1 156 } cpumask;
128#define PADATA_RESET 2 157 struct blocking_notifier_head cpumask_change_notifier;
129#define PADATA_INVALID 4 158 struct mutex lock;
159 u8 flags;
160#define PADATA_INIT 1
161#define PADATA_RESET 2
162#define PADATA_INVALID 4
130}; 163};
131 164
132extern struct padata_instance *padata_alloc(const struct cpumask *cpumask, 165extern struct padata_instance *padata_alloc(struct workqueue_struct *wq);
133 struct workqueue_struct *wq); 166extern struct padata_instance *__padata_alloc(struct workqueue_struct *wq,
167 const struct cpumask *pcpumask,
168 const struct cpumask *cbcpumask);
134extern void padata_free(struct padata_instance *pinst); 169extern void padata_free(struct padata_instance *pinst);
135extern int padata_do_parallel(struct padata_instance *pinst, 170extern int padata_do_parallel(struct padata_instance *pinst,
136 struct padata_priv *padata, int cb_cpu); 171 struct padata_priv *padata, int cb_cpu);
137extern void padata_do_serial(struct padata_priv *padata); 172extern void padata_do_serial(struct padata_priv *padata);
138extern int padata_set_cpumask(struct padata_instance *pinst, 173extern int padata_get_cpumask(struct padata_instance *pinst,
174 int cpumask_type, struct cpumask *out_mask);
175extern int padata_set_cpumask(struct padata_instance *pinst, int cpumask_type,
139 cpumask_var_t cpumask); 176 cpumask_var_t cpumask);
140extern int padata_add_cpu(struct padata_instance *pinst, int cpu); 177extern int __padata_set_cpumasks(struct padata_instance *pinst,
141extern int padata_remove_cpu(struct padata_instance *pinst, int cpu); 178 cpumask_var_t pcpumask,
179 cpumask_var_t cbcpumask);
180extern int padata_add_cpu(struct padata_instance *pinst, int cpu, int mask);
181extern int padata_remove_cpu(struct padata_instance *pinst, int cpu, int mask);
142extern int padata_start(struct padata_instance *pinst); 182extern int padata_start(struct padata_instance *pinst);
143extern void padata_stop(struct padata_instance *pinst); 183extern void padata_stop(struct padata_instance *pinst);
184extern int padata_register_cpumask_notifier(struct padata_instance *pinst,
185 struct notifier_block *nblock);
186extern int padata_unregister_cpumask_notifier(struct padata_instance *pinst,
187 struct notifier_block *nblock);
144#endif 188#endif
generated by cgit v1.2.2 (git 2.25.0) at 2026-01-23 22:03:45 -0500