drivers/media/pci/intel/ipu6/ipu6-mmu.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /* Copyright (C) 2013--2024 Intel Corporation */
   3
   4 #ifndef IPU6_MMU_H
   5 #define IPU6_MMU_H
   6
   7 #define ISYS_MMID 1
   8 #define PSYS_MMID 0
   9
  10 #include <linux/list.h>
  11 #include <linux/spinlock_types.h>
  12 #include <linux/types.h>
  13
  14 struct device;
  15 struct page;
  16 struct ipu6_hw_variants;
  17
  18 struct ipu6_mmu_info {
  19         struct device *dev;
  20
  21         u32 *l1_pt;
  22         u32 l1_pt_dma;
  23         u32 **l2_pts;
  24
  25         u32 *dummy_l2_pt;
  26         u32 dummy_l2_pteval;
  27         void *dummy_page;
  28         u32 dummy_page_pteval;
  29
  30         dma_addr_t aperture_start;
  31         dma_addr_t aperture_end;
  32         unsigned long pgsize_bitmap;
  33
  34         spinlock_t lock;        /* Serialize access to users */
  35         struct ipu6_dma_mapping *dmap;
  36 };
  37
  38 struct ipu6_mmu {
  39         struct list_head node;
  40
  41         struct ipu6_mmu_hw *mmu_hw;
  42         unsigned int nr_mmus;
  43         unsigned int mmid;
  44
  45         phys_addr_t pgtbl;
  46         struct device *dev;
  47
  48         struct ipu6_dma_mapping *dmap;
  49         struct list_head vma_list;
  50
  51         struct page *trash_page;
  52         dma_addr_t pci_trash_page; /* IOVA from PCI DMA services (parent) */
  53         dma_addr_t iova_trash_page; /* IOVA for IPU6 child nodes to use */
  54
  55         bool ready;
  56         spinlock_t ready_lock;  /* Serialize access to bool ready */
  57
  58         void (*tlb_invalidate)(struct ipu6_mmu *mmu);
  59 };
  60
  61 struct ipu6_mmu *ipu6_mmu_init(struct device *dev,
  62                                void __iomem *base, int mmid,
  63                                const struct ipu6_hw_variants *hw);
  64 void ipu6_mmu_cleanup(struct ipu6_mmu *mmu);
  65 int ipu6_mmu_hw_init(struct ipu6_mmu *mmu);
  66 void ipu6_mmu_hw_cleanup(struct ipu6_mmu *mmu);
  67 int ipu6_mmu_map(struct ipu6_mmu_info *mmu_info, unsigned long iova,
  68                  phys_addr_t paddr, size_t size);
  69 void ipu6_mmu_unmap(struct ipu6_mmu_info *mmu_info, unsigned long iova,
  70                     size_t size);
  71 phys_addr_t ipu6_mmu_iova_to_phys(struct ipu6_mmu_info *mmu_info,
  72                                   dma_addr_t iova);
  73 #endif