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