mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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c2052a4e5c
A2XX has its own very simple MMU. Added a msm_use_mmu() function because we can't rely on iommu_present to decide to use MMU or not. Signed-off-by: Jonathan Marek <jonathan@marek.ca> Signed-off-by: Rob Clark <robdclark@gmail.com>
60 lines
1.8 KiB
C
60 lines
1.8 KiB
C
/*
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* Copyright (C) 2013 Red Hat
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* Author: Rob Clark <robdclark@gmail.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published by
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* the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __MSM_MMU_H__
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#define __MSM_MMU_H__
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#include <linux/iommu.h>
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struct msm_mmu_funcs {
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int (*attach)(struct msm_mmu *mmu, const char * const *names, int cnt);
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void (*detach)(struct msm_mmu *mmu, const char * const *names, int cnt);
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int (*map)(struct msm_mmu *mmu, uint64_t iova, struct sg_table *sgt,
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unsigned len, int prot);
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int (*unmap)(struct msm_mmu *mmu, uint64_t iova, unsigned len);
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void (*destroy)(struct msm_mmu *mmu);
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};
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struct msm_mmu {
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const struct msm_mmu_funcs *funcs;
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struct device *dev;
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int (*handler)(void *arg, unsigned long iova, int flags);
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void *arg;
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};
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static inline void msm_mmu_init(struct msm_mmu *mmu, struct device *dev,
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const struct msm_mmu_funcs *funcs)
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{
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mmu->dev = dev;
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mmu->funcs = funcs;
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}
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struct msm_mmu *msm_iommu_new(struct device *dev, struct iommu_domain *domain);
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struct msm_mmu *msm_gpummu_new(struct device *dev, struct msm_gpu *gpu);
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static inline void msm_mmu_set_fault_handler(struct msm_mmu *mmu, void *arg,
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int (*handler)(void *arg, unsigned long iova, int flags))
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{
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mmu->arg = arg;
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mmu->handler = handler;
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}
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void msm_gpummu_params(struct msm_mmu *mmu, dma_addr_t *pt_base,
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dma_addr_t *tran_error);
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#endif /* __MSM_MMU_H__ */
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