1 files changed, 108 insertions, 0 deletions
diff --git a/arch/s390/include/asm/airq.h b/arch/s390/include/asm/airq.h
new file mode 100644
index 000000000..01936fdfa
--- /dev/null
+++ b/arch/s390/include/asm/airq.h
@@ -0,0 +1,108 @@
+/* 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>
+#include <linux/dma-mapping.h>
+
+struct airq_struct {
+	struct hlist_node list;		/* Handler queueing. */
+	void (*handler)(struct airq_struct *airq, bool floating);
+	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 */
+	dma_addr_t vector_dma; /* Adapter interrupt bit vector dma */
+	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 */
+	unsigned long flags;	/* Allocation flags */
+	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 */
+#define AIRQ_IV_CACHELINE	16	/* Cacheline alignment for the vector */
+
+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 */