diff options
Diffstat (limited to 'drivers/gpu/drm/msm/msm_mmu.h')
-rw-r--r-- | drivers/gpu/drm/msm/msm_mmu.h | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/drivers/gpu/drm/msm/msm_mmu.h b/drivers/gpu/drm/msm/msm_mmu.h new file mode 100644 index 0000000000..eb72d3645c --- /dev/null +++ b/drivers/gpu/drm/msm/msm_mmu.h @@ -0,0 +1,64 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (C) 2013 Red Hat + * Author: Rob Clark <robdclark@gmail.com> + */ + +#ifndef __MSM_MMU_H__ +#define __MSM_MMU_H__ + +#include <linux/iommu.h> + +struct msm_mmu_funcs { + void (*detach)(struct msm_mmu *mmu); + int (*map)(struct msm_mmu *mmu, uint64_t iova, struct sg_table *sgt, + size_t len, int prot); + int (*unmap)(struct msm_mmu *mmu, uint64_t iova, size_t len); + void (*destroy)(struct msm_mmu *mmu); + void (*resume_translation)(struct msm_mmu *mmu); +}; + +enum msm_mmu_type { + MSM_MMU_GPUMMU, + MSM_MMU_IOMMU, + MSM_MMU_IOMMU_PAGETABLE, +}; + +struct msm_mmu { + const struct msm_mmu_funcs *funcs; + struct device *dev; + int (*handler)(void *arg, unsigned long iova, int flags, void *data); + void *arg; + enum msm_mmu_type type; +}; + +static inline void msm_mmu_init(struct msm_mmu *mmu, struct device *dev, + const struct msm_mmu_funcs *funcs, enum msm_mmu_type type) +{ + mmu->dev = dev; + mmu->funcs = funcs; + mmu->type = type; +} + +struct msm_mmu *msm_iommu_new(struct device *dev, unsigned long quirks); +struct msm_mmu *msm_iommu_gpu_new(struct device *dev, struct msm_gpu *gpu, unsigned long quirks); +struct msm_mmu *msm_gpummu_new(struct device *dev, struct msm_gpu *gpu); + +static inline void msm_mmu_set_fault_handler(struct msm_mmu *mmu, void *arg, + int (*handler)(void *arg, unsigned long iova, int flags, void *data)) +{ + mmu->arg = arg; + mmu->handler = handler; +} + +struct msm_mmu *msm_iommu_pagetable_create(struct msm_mmu *parent); + +void msm_gpummu_params(struct msm_mmu *mmu, dma_addr_t *pt_base, + dma_addr_t *tran_error); + + +int msm_iommu_pagetable_params(struct msm_mmu *mmu, phys_addr_t *ttbr, + int *asid); +struct iommu_domain_geometry *msm_iommu_get_geometry(struct msm_mmu *mmu); + +#endif /* __MSM_MMU_H__ */ |