diff options
Diffstat (limited to 'drivers/media/pci/intel/ipu6/ipu6-mmu.h')
-rw-r--r-- | drivers/media/pci/intel/ipu6/ipu6-mmu.h | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/drivers/media/pci/intel/ipu6/ipu6-mmu.h b/drivers/media/pci/intel/ipu6/ipu6-mmu.h new file mode 100644 index 000000000000..21cdb0f146eb --- /dev/null +++ b/drivers/media/pci/intel/ipu6/ipu6-mmu.h @@ -0,0 +1,73 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* Copyright (C) 2013--2024 Intel Corporation */ + +#ifndef IPU6_MMU_H +#define IPU6_MMU_H + +#define ISYS_MMID 1 +#define PSYS_MMID 0 + +#include <linux/list.h> +#include <linux/spinlock_types.h> +#include <linux/types.h> + +struct device; +struct page; +struct ipu6_hw_variants; + +struct ipu6_mmu_info { + struct device *dev; + + u32 *l1_pt; + u32 l1_pt_dma; + u32 **l2_pts; + + u32 *dummy_l2_pt; + u32 dummy_l2_pteval; + void *dummy_page; + u32 dummy_page_pteval; + + dma_addr_t aperture_start; + dma_addr_t aperture_end; + unsigned long pgsize_bitmap; + + spinlock_t lock; /* Serialize access to users */ + struct ipu6_dma_mapping *dmap; +}; + +struct ipu6_mmu { + struct list_head node; + + struct ipu6_mmu_hw *mmu_hw; + unsigned int nr_mmus; + unsigned int mmid; + + phys_addr_t pgtbl; + struct device *dev; + + struct ipu6_dma_mapping *dmap; + struct list_head vma_list; + + struct page *trash_page; + dma_addr_t pci_trash_page; /* IOVA from PCI DMA services (parent) */ + dma_addr_t iova_trash_page; /* IOVA for IPU6 child nodes to use */ + + bool ready; + spinlock_t ready_lock; /* Serialize access to bool ready */ + + void (*tlb_invalidate)(struct ipu6_mmu *mmu); +}; + +struct ipu6_mmu *ipu6_mmu_init(struct device *dev, + void __iomem *base, int mmid, + const struct ipu6_hw_variants *hw); +void ipu6_mmu_cleanup(struct ipu6_mmu *mmu); +int ipu6_mmu_hw_init(struct ipu6_mmu *mmu); +void ipu6_mmu_hw_cleanup(struct ipu6_mmu *mmu); +int ipu6_mmu_map(struct ipu6_mmu_info *mmu_info, unsigned long iova, + phys_addr_t paddr, size_t size); +size_t ipu6_mmu_unmap(struct ipu6_mmu_info *mmu_info, unsigned long iova, + size_t size); +phys_addr_t ipu6_mmu_iova_to_phys(struct ipu6_mmu_info *mmu_info, + dma_addr_t iova); +#endif |