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