1 /* 2 * Copyright 2016,2017 IBM Corporation. 3 * 4 * This program is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU General Public License 6 * as published by the Free Software Foundation; either version 7 * 2 of the License, or (at your option) any later version. 8 */ 9 #ifndef __XIVE_INTERNAL_H 10 #define __XIVE_INTERNAL_H 11 12 /* Each CPU carry one of these with various per-CPU state */ 13 struct xive_cpu { 14 #ifdef CONFIG_SMP 15 /* HW irq number and data of IPI */ 16 u32 hw_ipi; 17 struct xive_irq_data ipi_data; 18 #endif /* CONFIG_SMP */ 19 20 int chip_id; 21 22 /* Queue datas. Only one is populated */ 23 #define XIVE_MAX_QUEUES 8 24 struct xive_q queue[XIVE_MAX_QUEUES]; 25 26 /* 27 * Pending mask. Each bit corresponds to a priority that 28 * potentially has pending interrupts. 29 */ 30 u8 pending_prio; 31 32 /* Cache of HW CPPR */ 33 u8 cppr; 34 }; 35 36 /* Backend ops */ 37 struct xive_ops { 38 int (*populate_irq_data)(u32 hw_irq, struct xive_irq_data *data); 39 int (*configure_irq)(u32 hw_irq, u32 target, u8 prio, u32 sw_irq); 40 int (*setup_queue)(unsigned int cpu, struct xive_cpu *xc, u8 prio); 41 void (*cleanup_queue)(unsigned int cpu, struct xive_cpu *xc, u8 prio); 42 void (*setup_cpu)(unsigned int cpu, struct xive_cpu *xc); 43 void (*teardown_cpu)(unsigned int cpu, struct xive_cpu *xc); 44 bool (*match)(struct device_node *np); 45 void (*shutdown)(void); 46 47 void (*update_pending)(struct xive_cpu *xc); 48 void (*eoi)(u32 hw_irq); 49 void (*sync_source)(u32 hw_irq); 50 u64 (*esb_rw)(u32 hw_irq, u32 offset, u64 data, bool write); 51 #ifdef CONFIG_SMP 52 int (*get_ipi)(unsigned int cpu, struct xive_cpu *xc); 53 void (*put_ipi)(unsigned int cpu, struct xive_cpu *xc); 54 #endif 55 const char *name; 56 }; 57 58 bool xive_core_init(const struct xive_ops *ops, void __iomem *area, u32 offset, 59 u8 max_prio); 60 __be32 *xive_queue_page_alloc(unsigned int cpu, u32 queue_shift); 61 62 static inline u32 xive_alloc_order(u32 queue_shift) 63 { 64 return (queue_shift > PAGE_SHIFT) ? (queue_shift - PAGE_SHIFT) : 0; 65 } 66 67 extern bool xive_cmdline_disabled; 68 69 #endif /* __XIVE_INTERNAL_H */ 70