109 lines
3.2 KiB
C
109 lines
3.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* Copyright IBM Corp. 2002, 2007
|
|
* Author(s): Ingo Adlung <adlung@de.ibm.com>
|
|
* Cornelia Huck <cornelia.huck@de.ibm.com>
|
|
* Arnd Bergmann <arndb@de.ibm.com>
|
|
* Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
|
|
*/
|
|
|
|
#ifndef _ASM_S390_AIRQ_H
|
|
#define _ASM_S390_AIRQ_H
|
|
|
|
#include <linux/bit_spinlock.h>
|
|
#include <linux/dma-mapping.h>
|
|
|
|
struct airq_struct {
|
|
struct hlist_node list; /* Handler queueing. */
|
|
void (*handler)(struct airq_struct *airq, bool floating);
|
|
u8 *lsi_ptr; /* Local-Summary-Indicator pointer */
|
|
u8 lsi_mask; /* Local-Summary-Indicator mask */
|
|
u8 isc; /* Interrupt-subclass */
|
|
u8 flags;
|
|
};
|
|
|
|
#define AIRQ_PTR_ALLOCATED 0x01
|
|
|
|
int register_adapter_interrupt(struct airq_struct *airq);
|
|
void unregister_adapter_interrupt(struct airq_struct *airq);
|
|
|
|
/* Adapter interrupt bit vector */
|
|
struct airq_iv {
|
|
unsigned long *vector; /* Adapter interrupt bit vector */
|
|
dma_addr_t vector_dma; /* Adapter interrupt bit vector dma */
|
|
unsigned long *avail; /* Allocation bit mask for the bit vector */
|
|
unsigned long *bitlock; /* Lock bit mask for the bit vector */
|
|
unsigned long *ptr; /* Pointer associated with each bit */
|
|
unsigned int *data; /* 32 bit value associated with each bit */
|
|
unsigned long bits; /* Number of bits in the vector */
|
|
unsigned long end; /* Number of highest allocated bit + 1 */
|
|
unsigned long flags; /* Allocation flags */
|
|
spinlock_t lock; /* Lock to protect alloc & free */
|
|
};
|
|
|
|
#define AIRQ_IV_ALLOC 1 /* Use an allocation bit mask */
|
|
#define AIRQ_IV_BITLOCK 2 /* Allocate the lock bit mask */
|
|
#define AIRQ_IV_PTR 4 /* Allocate the ptr array */
|
|
#define AIRQ_IV_DATA 8 /* Allocate the data array */
|
|
#define AIRQ_IV_CACHELINE 16 /* Cacheline alignment for the vector */
|
|
|
|
struct airq_iv *airq_iv_create(unsigned long bits, unsigned long flags);
|
|
void airq_iv_release(struct airq_iv *iv);
|
|
unsigned long airq_iv_alloc(struct airq_iv *iv, unsigned long num);
|
|
void airq_iv_free(struct airq_iv *iv, unsigned long bit, unsigned long num);
|
|
unsigned long airq_iv_scan(struct airq_iv *iv, unsigned long start,
|
|
unsigned long end);
|
|
|
|
static inline unsigned long airq_iv_alloc_bit(struct airq_iv *iv)
|
|
{
|
|
return airq_iv_alloc(iv, 1);
|
|
}
|
|
|
|
static inline void airq_iv_free_bit(struct airq_iv *iv, unsigned long bit)
|
|
{
|
|
airq_iv_free(iv, bit, 1);
|
|
}
|
|
|
|
static inline unsigned long airq_iv_end(struct airq_iv *iv)
|
|
{
|
|
return iv->end;
|
|
}
|
|
|
|
static inline void airq_iv_lock(struct airq_iv *iv, unsigned long bit)
|
|
{
|
|
const unsigned long be_to_le = BITS_PER_LONG - 1;
|
|
bit_spin_lock(bit ^ be_to_le, iv->bitlock);
|
|
}
|
|
|
|
static inline void airq_iv_unlock(struct airq_iv *iv, unsigned long bit)
|
|
{
|
|
const unsigned long be_to_le = BITS_PER_LONG - 1;
|
|
bit_spin_unlock(bit ^ be_to_le, iv->bitlock);
|
|
}
|
|
|
|
static inline void airq_iv_set_data(struct airq_iv *iv, unsigned long bit,
|
|
unsigned int data)
|
|
{
|
|
iv->data[bit] = data;
|
|
}
|
|
|
|
static inline unsigned int airq_iv_get_data(struct airq_iv *iv,
|
|
unsigned long bit)
|
|
{
|
|
return iv->data[bit];
|
|
}
|
|
|
|
static inline void airq_iv_set_ptr(struct airq_iv *iv, unsigned long bit,
|
|
unsigned long ptr)
|
|
{
|
|
iv->ptr[bit] = ptr;
|
|
}
|
|
|
|
static inline unsigned long airq_iv_get_ptr(struct airq_iv *iv,
|
|
unsigned long bit)
|
|
{
|
|
return iv->ptr[bit];
|
|
}
|
|
|
|
#endif /* _ASM_S390_AIRQ_H */
|