forked from Minki/linux
e68f270f21
With MMUv2 all buffers need to be mapped through the MMU once it is enabled. Align the buffer size to 4K, as the MMU is only able to map page aligned buffers. Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
77 lines
2.3 KiB
C
77 lines
2.3 KiB
C
/*
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* Copyright (C) 2015 Etnaviv Project
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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 __ETNAVIV_MMU_H__
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#define __ETNAVIV_MMU_H__
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#include <linux/iommu.h>
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enum etnaviv_iommu_version {
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ETNAVIV_IOMMU_V1 = 0,
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ETNAVIV_IOMMU_V2,
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};
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struct etnaviv_gpu;
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struct etnaviv_vram_mapping;
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struct etnaviv_iommu_ops {
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struct iommu_ops ops;
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size_t (*dump_size)(struct iommu_domain *);
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void (*dump)(struct iommu_domain *, void *);
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};
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struct etnaviv_iommu {
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struct etnaviv_gpu *gpu;
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struct iommu_domain *domain;
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enum etnaviv_iommu_version version;
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/* memory manager for GPU address area */
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struct mutex lock;
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struct list_head mappings;
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struct drm_mm mm;
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u32 last_iova;
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bool need_flush;
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};
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struct etnaviv_gem_object;
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int etnaviv_iommu_attach(struct etnaviv_iommu *iommu, const char **names,
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int cnt);
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int etnaviv_iommu_map(struct etnaviv_iommu *iommu, u32 iova,
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struct sg_table *sgt, unsigned len, int prot);
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int etnaviv_iommu_unmap(struct etnaviv_iommu *iommu, u32 iova,
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struct sg_table *sgt, unsigned len);
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int etnaviv_iommu_map_gem(struct etnaviv_iommu *mmu,
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struct etnaviv_gem_object *etnaviv_obj, u32 memory_base,
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struct etnaviv_vram_mapping *mapping);
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void etnaviv_iommu_unmap_gem(struct etnaviv_iommu *mmu,
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struct etnaviv_vram_mapping *mapping);
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void etnaviv_iommu_destroy(struct etnaviv_iommu *iommu);
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u32 etnaviv_iommu_get_cmdbuf_va(struct etnaviv_gpu *gpu,
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struct etnaviv_cmdbuf *buf);
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void etnaviv_iommu_put_cmdbuf_va(struct etnaviv_gpu *gpu,
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struct etnaviv_cmdbuf *buf);
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size_t etnaviv_iommu_dump_size(struct etnaviv_iommu *iommu);
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void etnaviv_iommu_dump(struct etnaviv_iommu *iommu, void *buf);
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struct etnaviv_iommu *etnaviv_iommu_new(struct etnaviv_gpu *gpu);
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void etnaviv_iommu_restore(struct etnaviv_gpu *gpu);
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#endif /* __ETNAVIV_MMU_H__ */
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