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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 | /* 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> struct airq_struct { struct hlist_node list; /* Handler queueing. */ void (*handler)(struct airq_struct *); /* Thin-interrupt handler */ 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 */ 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 */ 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 */ 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 */ |