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/*
* Copyright 2016,2017 IBM Corporation.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#ifndef __XIVE_INTERNAL_H
#define __XIVE_INTERNAL_H
/*
* A "disabled" interrupt should never fire, to catch problems
* we set its logical number to this
*/
#define XIVE_BAD_IRQ 0x7fffffff
#define XIVE_MAX_IRQ (XIVE_BAD_IRQ - 1)
/* Each CPU carry one of these with various per-CPU state */
struct xive_cpu {
#ifdef CONFIG_SMP
/* HW irq number and data of IPI */
u32 hw_ipi;
struct xive_irq_data ipi_data;
#endif /* CONFIG_SMP */
int chip_id;
/* Queue datas. Only one is populated */
#define XIVE_MAX_QUEUES 8
struct xive_q queue[XIVE_MAX_QUEUES];
/*
* Pending mask. Each bit corresponds to a priority that
* potentially has pending interrupts.
*/
u8 pending_prio;
/* Cache of HW CPPR */
u8 cppr;
};
/* Backend ops */
struct xive_ops {
int (*populate_irq_data)(u32 hw_irq, struct xive_irq_data *data);
int (*configure_irq)(u32 hw_irq, u32 target, u8 prio, u32 sw_irq);
int (*setup_queue)(unsigned int cpu, struct xive_cpu *xc, u8 prio);
void (*cleanup_queue)(unsigned int cpu, struct xive_cpu *xc, u8 prio);
void (*setup_cpu)(unsigned int cpu, struct xive_cpu *xc);
void (*teardown_cpu)(unsigned int cpu, struct xive_cpu *xc);
bool (*match)(struct device_node *np);
void (*shutdown)(void);
void (*update_pending)(struct xive_cpu *xc);
void (*eoi)(u32 hw_irq);
void (*sync_source)(u32 hw_irq);
u64 (*esb_rw)(u32 hw_irq, u32 offset, u64 data, bool write);
#ifdef CONFIG_SMP
int (*get_ipi)(unsigned int cpu, struct xive_cpu *xc);
void (*put_ipi)(unsigned int cpu, struct xive_cpu *xc);
#endif
const char *name;
};
bool xive_core_init(const struct xive_ops *ops, void __iomem *area, u32 offset,
u8 max_prio);
__be32 *xive_queue_page_alloc(unsigned int cpu, u32 queue_shift);
static inline u32 xive_alloc_order(u32 queue_shift)
{
return (queue_shift > PAGE_SHIFT) ? (queue_shift - PAGE_SHIFT) : 0;
}
extern bool xive_cmdline_disabled;
#endif /* __XIVE_INTERNAL_H */
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