arch/powerpc/sysdev/xive/xive-internal.h

   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 */