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a1409adac7
There is a single npu context per set of callback parameters. Callers
should be prevented from overwriting existing callback values so
instead return an error if different parameters are passed.
Fixes: 1ab66d1fba ("powerpc/powernv: Introduce address translation services for Nvlink2")
Cc: stable@vger.kernel.org # v4.12+
Signed-off-by: Alistair Popple <alistair@popple.id.au>
Reviewed-by: Mark Hairgrove <mhairgrove@nvidia.com>
Tested-by: Mark Hairgrove <mhairgrove@nvidia.com>
Reviewed-by: Balbir Singh <bsingharora@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
46 lines
1.5 KiB
C
46 lines
1.5 KiB
C
/*
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* Copyright 2017 IBM Corp.
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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 _ASM_POWERNV_H
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#define _ASM_POWERNV_H
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#ifdef CONFIG_PPC_POWERNV
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#define NPU2_WRITE 1
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extern void powernv_set_nmmu_ptcr(unsigned long ptcr);
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extern struct npu_context *pnv_npu2_init_context(struct pci_dev *gpdev,
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unsigned long flags,
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void (*cb)(struct npu_context *, void *),
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void *priv);
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extern void pnv_npu2_destroy_context(struct npu_context *context,
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struct pci_dev *gpdev);
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extern int pnv_npu2_handle_fault(struct npu_context *context, uintptr_t *ea,
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unsigned long *flags, unsigned long *status,
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int count);
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void pnv_tm_init(void);
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#else
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static inline void powernv_set_nmmu_ptcr(unsigned long ptcr) { }
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static inline struct npu_context *pnv_npu2_init_context(struct pci_dev *gpdev,
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unsigned long flags,
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struct npu_context *(*cb)(struct npu_context *, void *),
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void *priv) { return ERR_PTR(-ENODEV); }
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static inline void pnv_npu2_destroy_context(struct npu_context *context,
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struct pci_dev *gpdev) { }
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static inline int pnv_npu2_handle_fault(struct npu_context *context,
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uintptr_t *ea, unsigned long *flags,
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unsigned long *status, int count) {
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return -ENODEV;
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}
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static inline void pnv_tm_init(void) { }
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static inline void pnv_power9_force_smt4(void) { }
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#endif
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#endif /* _ASM_POWERNV_H */
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