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