arch/powerpc/include/asm/powernv.h

   1 /*
   2  * Copyright 2017 IBM Corp.
   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
  10 #ifndef _ASM_POWERNV_H
  11 #define _ASM_POWERNV_H
  12
  13 #ifdef CONFIG_PPC_POWERNV
  14 #define NPU2_WRITE 1
  15 extern void powernv_set_nmmu_ptcr(unsigned long ptcr);
  16 extern struct npu_context *pnv_npu2_init_context(struct pci_dev *gpdev,
  17                         unsigned long flags,
  18                         struct npu_context *(*cb)(struct npu_context *, void *),
  19                         void *priv);
  20 extern void pnv_npu2_destroy_context(struct npu_context *context,
  21                                 struct pci_dev *gpdev);
  22 extern int pnv_npu2_handle_fault(struct npu_context *context, uintptr_t *ea,
  23                                 unsigned long *flags, unsigned long *status,
  24                                 int count);
  25 #else
  26 static inline void powernv_set_nmmu_ptcr(unsigned long ptcr) { }
  27 static inline struct npu_context *pnv_npu2_init_context(struct pci_dev *gpdev,
  28                         unsigned long flags,
  29                         struct npu_context *(*cb)(struct npu_context *, void *),
  30                         void *priv) { return ERR_PTR(-ENODEV); }
  31 static inline void pnv_npu2_destroy_context(struct npu_context *context,
  32                                         struct pci_dev *gpdev) { }
  33
  34 static inline int pnv_npu2_handle_fault(struct npu_context *context,
  35                                         uintptr_t *ea, unsigned long *flags,
  36                                         unsigned long *status, int count) {
  37         return -ENODEV;
  38 }
  39 #endif
  40
  41 #endif /* _ASM_POWERNV_H */