1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Copyright IBM Corp. 2002, 2007 4 * Author(s): Ingo Adlung <adlung@de.ibm.com> 5 * Cornelia Huck <cornelia.huck@de.ibm.com> 6 * Arnd Bergmann <arndb@de.ibm.com> 7 * Peter Oberparleiter <peter.oberparleiter@de.ibm.com> 8 */ 9 10 #ifndef _ASM_S390_AIRQ_H 11 #define _ASM_S390_AIRQ_H 12 13 #include <linux/bit_spinlock.h> 14 15 struct airq_struct { 16 struct hlist_node list; /* Handler queueing. */ 17 void (*handler)(struct airq_struct *airq, bool floating); 18 u8 *lsi_ptr; /* Local-Summary-Indicator pointer */ 19 u8 lsi_mask; /* Local-Summary-Indicator mask */ 20 u8 isc; /* Interrupt-subclass */ 21 u8 flags; 22 }; 23 24 #define AIRQ_PTR_ALLOCATED 0x01 25 26 int register_adapter_interrupt(struct airq_struct *airq); 27 void unregister_adapter_interrupt(struct airq_struct *airq); 28 29 /* Adapter interrupt bit vector */ 30 struct airq_iv { 31 unsigned long *vector; /* Adapter interrupt bit vector */ 32 unsigned long *avail; /* Allocation bit mask for the bit vector */ 33 unsigned long *bitlock; /* Lock bit mask for the bit vector */ 34 unsigned long *ptr; /* Pointer associated with each bit */ 35 unsigned int *data; /* 32 bit value associated with each bit */ 36 unsigned long bits; /* Number of bits in the vector */ 37 unsigned long end; /* Number of highest allocated bit + 1 */ 38 unsigned long flags; /* Allocation flags */ 39 spinlock_t lock; /* Lock to protect alloc & free */ 40 }; 41 42 #define AIRQ_IV_ALLOC 1 /* Use an allocation bit mask */ 43 #define AIRQ_IV_BITLOCK 2 /* Allocate the lock bit mask */ 44 #define AIRQ_IV_PTR 4 /* Allocate the ptr array */ 45 #define AIRQ_IV_DATA 8 /* Allocate the data array */ 46 #define AIRQ_IV_CACHELINE 16 /* Cacheline alignment for the vector */ 47 48 struct airq_iv *airq_iv_create(unsigned long bits, unsigned long flags); 49 void airq_iv_release(struct airq_iv *iv); 50 unsigned long airq_iv_alloc(struct airq_iv *iv, unsigned long num); 51 void airq_iv_free(struct airq_iv *iv, unsigned long bit, unsigned long num); 52 unsigned long airq_iv_scan(struct airq_iv *iv, unsigned long start, 53 unsigned long end); 54 55 static inline unsigned long airq_iv_alloc_bit(struct airq_iv *iv) 56 { 57 return airq_iv_alloc(iv, 1); 58 } 59 60 static inline void airq_iv_free_bit(struct airq_iv *iv, unsigned long bit) 61 { 62 airq_iv_free(iv, bit, 1); 63 } 64 65 static inline unsigned long airq_iv_end(struct airq_iv *iv) 66 { 67 return iv->end; 68 } 69 70 static inline void airq_iv_lock(struct airq_iv *iv, unsigned long bit) 71 { 72 const unsigned long be_to_le = BITS_PER_LONG - 1; 73 bit_spin_lock(bit ^ be_to_le, iv->bitlock); 74 } 75 76 static inline void airq_iv_unlock(struct airq_iv *iv, unsigned long bit) 77 { 78 const unsigned long be_to_le = BITS_PER_LONG - 1; 79 bit_spin_unlock(bit ^ be_to_le, iv->bitlock); 80 } 81 82 static inline void airq_iv_set_data(struct airq_iv *iv, unsigned long bit, 83 unsigned int data) 84 { 85 iv->data[bit] = data; 86 } 87 88 static inline unsigned int airq_iv_get_data(struct airq_iv *iv, 89 unsigned long bit) 90 { 91 return iv->data[bit]; 92 } 93 94 static inline void airq_iv_set_ptr(struct airq_iv *iv, unsigned long bit, 95 unsigned long ptr) 96 { 97 iv->ptr[bit] = ptr; 98 } 99 100 static inline unsigned long airq_iv_get_ptr(struct airq_iv *iv, 101 unsigned long bit) 102 { 103 return iv->ptr[bit]; 104 } 105 106 #endif /* _ASM_S390_AIRQ_H */ 107