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 #include <asm/tpi.h> 16 17 struct airq_struct { 18 struct hlist_node list; /* Handler queueing. */ 19 void (*handler)(struct airq_struct *airq, struct tpi_info *tpi_info); 20 u8 *lsi_ptr; /* Local-Summary-Indicator pointer */ 21 u8 lsi_mask; /* Local-Summary-Indicator mask */ 22 u8 isc; /* Interrupt-subclass */ 23 u8 flags; 24 }; 25 26 #define AIRQ_PTR_ALLOCATED 0x01 27 28 int register_adapter_interrupt(struct airq_struct *airq); 29 void unregister_adapter_interrupt(struct airq_struct *airq); 30 31 /* Adapter interrupt bit vector */ 32 struct airq_iv { 33 unsigned long *vector; /* Adapter interrupt bit vector */ 34 dma_addr_t vector_dma; /* Adapter interrupt bit vector dma */ 35 unsigned long *avail; /* Allocation bit mask for the bit vector */ 36 unsigned long *bitlock; /* Lock bit mask for the bit vector */ 37 unsigned long *ptr; /* Pointer associated with each bit */ 38 unsigned int *data; /* 32 bit value associated with each bit */ 39 unsigned long bits; /* Number of bits in the vector */ 40 unsigned long end; /* Number of highest allocated bit + 1 */ 41 unsigned long flags; /* Allocation flags */ 42 spinlock_t lock; /* Lock to protect alloc & free */ 43 }; 44 45 #define AIRQ_IV_ALLOC 1 /* Use an allocation bit mask */ 46 #define AIRQ_IV_BITLOCK 2 /* Allocate the lock bit mask */ 47 #define AIRQ_IV_PTR 4 /* Allocate the ptr array */ 48 #define AIRQ_IV_DATA 8 /* Allocate the data array */ 49 #define AIRQ_IV_CACHELINE 16 /* Cacheline alignment for the vector */ 50 #define AIRQ_IV_GUESTVEC 32 /* Vector is a pinned guest page */ 51 52 struct airq_iv *airq_iv_create(unsigned long bits, unsigned long flags, 53 unsigned long *vec); 54 void airq_iv_release(struct airq_iv *iv); 55 unsigned long airq_iv_alloc(struct airq_iv *iv, unsigned long num); 56 void airq_iv_free(struct airq_iv *iv, unsigned long bit, unsigned long num); 57 unsigned long airq_iv_scan(struct airq_iv *iv, unsigned long start, 58 unsigned long end); 59 60 static inline unsigned long airq_iv_alloc_bit(struct airq_iv *iv) 61 { 62 return airq_iv_alloc(iv, 1); 63 } 64 65 static inline void airq_iv_free_bit(struct airq_iv *iv, unsigned long bit) 66 { 67 airq_iv_free(iv, bit, 1); 68 } 69 70 static inline unsigned long airq_iv_end(struct airq_iv *iv) 71 { 72 return iv->end; 73 } 74 75 static inline void airq_iv_lock(struct airq_iv *iv, unsigned long bit) 76 { 77 const unsigned long be_to_le = BITS_PER_LONG - 1; 78 bit_spin_lock(bit ^ be_to_le, iv->bitlock); 79 } 80 81 static inline void airq_iv_unlock(struct airq_iv *iv, unsigned long bit) 82 { 83 const unsigned long be_to_le = BITS_PER_LONG - 1; 84 bit_spin_unlock(bit ^ be_to_le, iv->bitlock); 85 } 86 87 static inline void airq_iv_set_data(struct airq_iv *iv, unsigned long bit, 88 unsigned int data) 89 { 90 iv->data[bit] = data; 91 } 92 93 static inline unsigned int airq_iv_get_data(struct airq_iv *iv, 94 unsigned long bit) 95 { 96 return iv->data[bit]; 97 } 98 99 static inline void airq_iv_set_ptr(struct airq_iv *iv, unsigned long bit, 100 unsigned long ptr) 101 { 102 iv->ptr[bit] = ptr; 103 } 104 105 static inline unsigned long airq_iv_get_ptr(struct airq_iv *iv, 106 unsigned long bit) 107 { 108 return iv->ptr[bit]; 109 } 110 111 #endif /* _ASM_S390_AIRQ_H */ 112