forked from Minki/linux
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>
47 lines
1.5 KiB
C
47 lines
1.5 KiB
C
/*
|
|
* Copyright 2017 IBM Corp.
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; either version
|
|
* 2 of the License, or (at your option) any later version.
|
|
*/
|
|
|
|
#ifndef _ASM_POWERNV_H
|
|
#define _ASM_POWERNV_H
|
|
|
|
#ifdef CONFIG_PPC_POWERNV
|
|
#define NPU2_WRITE 1
|
|
extern void powernv_set_nmmu_ptcr(unsigned long ptcr);
|
|
extern struct npu_context *pnv_npu2_init_context(struct pci_dev *gpdev,
|
|
unsigned long flags,
|
|
void (*cb)(struct npu_context *, void *),
|
|
void *priv);
|
|
extern void pnv_npu2_destroy_context(struct npu_context *context,
|
|
struct pci_dev *gpdev);
|
|
extern int pnv_npu2_handle_fault(struct npu_context *context, uintptr_t *ea,
|
|
unsigned long *flags, unsigned long *status,
|
|
int count);
|
|
|
|
void pnv_tm_init(void);
|
|
#else
|
|
static inline void powernv_set_nmmu_ptcr(unsigned long ptcr) { }
|
|
static inline struct npu_context *pnv_npu2_init_context(struct pci_dev *gpdev,
|
|
unsigned long flags,
|
|
struct npu_context *(*cb)(struct npu_context *, void *),
|
|
void *priv) { return ERR_PTR(-ENODEV); }
|
|
static inline void pnv_npu2_destroy_context(struct npu_context *context,
|
|
struct pci_dev *gpdev) { }
|
|
|
|
static inline int pnv_npu2_handle_fault(struct npu_context *context,
|
|
uintptr_t *ea, unsigned long *flags,
|
|
unsigned long *status, int count) {
|
|
return -ENODEV;
|
|
}
|
|
|
|
static inline void pnv_tm_init(void) { }
|
|
static inline void pnv_power9_force_smt4(void) { }
|
|
#endif
|
|
|
|
#endif /* _ASM_POWERNV_H */
|