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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/arch/powerpc/sysdev/xive/xive-internal.h
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/* SPDX-License-Identifier: GPL-2.0-or-later */

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/*

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 * Copyright 2016,2017 IBM Corporation.

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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	(*get_irq_config)(u32 hw_irq, u32 *target, u8 *prio,

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				  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	(*prepare_cpu)(unsigned int cpu, struct xive_cpu *xc);

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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	(*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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	int	(*debug_show)(struct seq_file *m, void *private);

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	int	(*debug_create)(struct dentry *xive_dir);

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	const char *name;

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};

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bool xive_core_init(struct device_node *np, const struct xive_ops *ops,

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		    void __iomem *area, u32 offset, u8 max_prio);

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__be32 *xive_queue_page_alloc(unsigned int cpu, u32 queue_shift);

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int xive_core_debug_init(void);

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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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extern bool xive_has_save_restore;

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#endif /*  __XIVE_INTERNAL_H */

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