[mirror_ubuntu-artful-kernel.git] / arch / x86 / kvm / i8254.h

#ifndef __I8254_H
#define __I8254_H

#include <linux/kthread.h>

#include "iodev.h"

struct kvm_kpit_channel_state {
	u32 count; /* can be 65536 */
	u16 latched_count;
	u8 count_latched;
	u8 status_latched;
	u8 status;
	u8 read_state;
	u8 write_state;
	u8 write_latch;
	u8 rw_mode;
	u8 mode;
	u8 bcd; /* not supported */
	u8 gate; /* timer start */
	ktime_t count_load_time;
};

struct kvm_kpit_state {
	struct kvm_kpit_channel_state channels[3];
	u32 flags;
	bool is_periodic;
	s64 period; 				/* unit: ns */
	struct hrtimer timer;
	atomic_t pending;			/* accumulated triggered timers */
	bool reinject;
	struct kvm *kvm;
	u32    speaker_data_on;
	struct mutex lock;
	struct kvm_pit *pit;
	spinlock_t inject_lock;
	unsigned long irq_ack;
	struct kvm_irq_ack_notifier irq_ack_notifier;
};

struct kvm_pit {
	struct kvm_io_device dev;
	struct kvm_io_device speaker_dev;
	struct kvm *kvm;
	struct kvm_kpit_state pit_state;
	int irq_source_id;
	struct kvm_irq_mask_notifier mask_notifier;
	struct kthread_worker worker;
	struct task_struct *worker_task;
	struct kthread_work expired;
};

#define KVM_PIT_BASE_ADDRESS	    0x40
#define KVM_SPEAKER_BASE_ADDRESS    0x61
#define KVM_PIT_MEM_LENGTH	    4
#define KVM_PIT_FREQ		    1193181
#define KVM_MAX_PIT_INTR_INTERVAL   HZ / 100
#define KVM_PIT_CHANNEL_MASK	    0x3

void kvm_pit_load_count(struct kvm *kvm, int channel, u32 val, int hpet_legacy_start);
struct kvm_pit *kvm_create_pit(struct kvm *kvm, u32 flags);
void kvm_free_pit(struct kvm *kvm);
void kvm_pit_reset(struct kvm_pit *pit);

#endif
Commit	Line	Data
7837699f SY	1	#ifndef __I8254_H
	2	#define __I8254_H
	3
b6ddf05f JK	4	#include <linux/kthread.h>
b6ddf05f JK	5
7837699f SY	6	#include "iodev.h"
7837699f SY	7
7837699f SY	8	struct kvm_kpit_channel_state {
	9	u32 count; /* can be 65536 */
	10	u16 latched_count;
	11	u8 count_latched;
	12	u8 status_latched;
	13	u8 status;
	14	u8 read_state;
	15	u8 write_state;
	16	u8 write_latch;
	17	u8 rw_mode;
	18	u8 mode;
	19	u8 bcd; /* not supported */
	20	u8 gate; /* timer start */
	21	ktime_t count_load_time;
	22	};
	23
	24	struct kvm_kpit_state {
	25	struct kvm_kpit_channel_state channels[3];
e9f42757	26	u32 flags;
d3c7b77d	27	bool is_periodic;
26ef1924 AK	28	s64 period; /* unit: ns */
	29	struct hrtimer timer;
	30	atomic_t pending; /* accumulated triggered timers */
	31	bool reinject;
	32	struct kvm *kvm;
7837699f SY	33	u32 speaker_data_on;
	34	struct mutex lock;
	35	struct kvm_pit *pit;
33572ac0	36	spinlock_t inject_lock;
3cf57fed MT	37	unsigned long irq_ack;
3cf57fed MT	38	struct kvm_irq_ack_notifier irq_ack_notifier;
7837699f SY	39	};
	40
	41	struct kvm_pit {
7837699f SY	42	struct kvm_io_device dev;
	43	struct kvm_io_device speaker_dev;
	44	struct kvm *kvm;
	45	struct kvm_kpit_state pit_state;
5550af4d	46	int irq_source_id;
4780c659	47	struct kvm_irq_mask_notifier mask_notifier;
b6ddf05f JK	48	struct kthread_worker worker;
	49	struct task_struct *worker_task;
	50	struct kthread_work expired;
7837699f SY	51	};
	52
	53	#define KVM_PIT_BASE_ADDRESS 0x40
	54	#define KVM_SPEAKER_BASE_ADDRESS 0x61
	55	#define KVM_PIT_MEM_LENGTH 4
	56	#define KVM_PIT_FREQ 1193181
	57	#define KVM_MAX_PIT_INTR_INTERVAL HZ / 100
	58	#define KVM_PIT_CHANNEL_MASK 0x3
	59
e9f42757	60	void kvm_pit_load_count(struct kvm *kvm, int channel, u32 val, int hpet_legacy_start);
c5ff41ce	61	struct kvm_pit kvm_create_pit(struct kvm kvm, u32 flags);
7837699f	62	void kvm_free_pit(struct kvm *kvm);
308b0f23	63	void kvm_pit_reset(struct kvm_pit *pit);
7837699f SY	64
7837699f SY	65	#endif