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 #include <linux/dma-mapping.h> 15 16 struct airq_struct { 17 struct hlist_node list; /* Handler queueing. */ 18 void (*handler)(struct airq_struct *airq, bool floating); 19 u8 *lsi_ptr; /* Local-Summary-Indicator pointer */ 20 u8 lsi_mask; /* Local-Summary-Indicator mask */ 21 u8 isc; /* Interrupt-subclass */ 22 u8 flags; 23 }; 24 25 #define AIRQ_PTR_ALLOCATED 0x01 26 27 int register_adapter_interrupt(struct airq_struct *airq); 28 void unregister_adapter_interrupt(struct airq_struct *airq); 29 30 /* Adapter interrupt bit vector */ 31 struct airq_iv { 32 unsigned long *vector; /* Adapter interrupt bit vector */ 33 dma_addr_t vector_dma; /* Adapter interrupt bit vector dma */ 34 unsigned long *avail; /* Allocation bit mask for the bit vector */ 35 unsigned long *bitlock; /* Lock bit mask for the bit vector */ 36 unsigned long *ptr; /* Pointer associated with each bit */ 37 unsigned int *data; /* 32 bit value associated with each bit */ 38 unsigned long bits; /* Number of bits in the vector */ 39 unsigned long end; /* Number of highest allocated bit + 1 */ 40 unsigned long flags; /* Allocation flags */ 41 spinlock_t lock; /* Lock to protect alloc & free */ 42 }; 43 44 #define AIRQ_IV_ALLOC 1 /* Use an allocation bit mask */ 45 #define AIRQ_IV_BITLOCK 2 /* Allocate the lock bit mask */ 46 #define AIRQ_IV_PTR 4 /* Allocate the ptr array */ 47 #define AIRQ_IV_DATA 8 /* Allocate the data array */ 48 #define AIRQ_IV_CACHELINE 16 /* Cacheline alignment for the vector */ 49 50 struct airq_iv *airq_iv_create(unsigned long bits, unsigned long flags); 51 void airq_iv_release(struct airq_iv *iv); 52 unsigned long airq_iv_alloc(struct airq_iv *iv, unsigned long num); 53 void airq_iv_free(struct airq_iv *iv, unsigned long bit, unsigned long num); 54 unsigned long airq_iv_scan(struct airq_iv *iv, unsigned long start, 55 unsigned long end); 56 57 static inline unsigned long airq_iv_alloc_bit(struct airq_iv *iv) 58 { 59 return airq_iv_alloc(iv, 1); 60 } 61 62 static inline void airq_iv_free_bit(struct airq_iv *iv, unsigned long bit) 63 { 64 airq_iv_free(iv, bit, 1); 65 } 66 67 static inline unsigned long airq_iv_end(struct airq_iv *iv) 68 { 69 return iv->end; 70 } 71 72 static inline void airq_iv_lock(struct airq_iv *iv, unsigned long bit) 73 { 74 const unsigned long be_to_le = BITS_PER_LONG - 1; 75 bit_spin_lock(bit ^ be_to_le, iv->bitlock); 76 } 77 78 static inline void airq_iv_unlock(struct airq_iv *iv, unsigned long bit) 79 { 80 const unsigned long be_to_le = BITS_PER_LONG - 1; 81 bit_spin_unlock(bit ^ be_to_le, iv->bitlock); 82 } 83 84 static inline void airq_iv_set_data(struct airq_iv *iv, unsigned long bit, 85 unsigned int data) 86 { 87 iv->data[bit] = data; 88 } 89 90 static inline unsigned int airq_iv_get_data(struct airq_iv *iv, 91 unsigned long bit) 92 { 93 return iv->data[bit]; 94 } 95 96 static inline void airq_iv_set_ptr(struct airq_iv *iv, unsigned long bit, 97 unsigned long ptr) 98 { 99 iv->ptr[bit] = ptr; 100 } 101 102 static inline unsigned long airq_iv_get_ptr(struct airq_iv *iv, 103 unsigned long bit) 104 { 105 return iv->ptr[bit]; 106 } 107 108 #endif /* _ASM_S390_AIRQ_H */ 109