drivers/gpu/drm/etnaviv/etnaviv_gem.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Copyright (C) 2015-2018 Etnaviv Project
   4  */
   5
   6 #ifndef __ETNAVIV_GEM_H__
   7 #define __ETNAVIV_GEM_H__
   8
   9 #include <linux/reservation.h>
  10 #include "etnaviv_cmdbuf.h"
  11 #include "etnaviv_drv.h"
  12
  13 struct dma_fence;
  14 struct etnaviv_gem_ops;
  15 struct etnaviv_gem_object;
  16
  17 struct etnaviv_gem_userptr {
  18         uintptr_t ptr;
  19         struct mm_struct *mm;
  20         bool ro;
  21 };
  22
  23 struct etnaviv_vram_mapping {
  24         struct list_head obj_node;
  25         struct list_head scan_node;
  26         struct list_head mmu_node;
  27         struct etnaviv_gem_object *object;
  28         struct etnaviv_iommu *mmu;
  29         struct drm_mm_node vram_node;
  30         unsigned int use;
  31         u32 iova;
  32 };
  33
  34 struct etnaviv_gem_object {
  35         struct drm_gem_object base;
  36         const struct etnaviv_gem_ops *ops;
  37         struct mutex lock;
  38
  39         u32 flags;
  40
  41         struct list_head gem_node;
  42         struct etnaviv_gpu *gpu;     /* non-null if active */
  43         atomic_t gpu_active;
  44         u32 access;
  45
  46         struct page **pages;
  47         struct sg_table *sgt;
  48         void *vaddr;
  49
  50         /* normally (resv == &_resv) except for imported bo's */
  51         struct reservation_object *resv;
  52         struct reservation_object _resv;
  53
  54         struct list_head vram_list;
  55
  56         /* cache maintenance */
  57         u32 last_cpu_prep_op;
  58
  59         struct etnaviv_gem_userptr userptr;
  60 };
  61
  62 static inline
  63 struct etnaviv_gem_object *to_etnaviv_bo(struct drm_gem_object *obj)
  64 {
  65         return container_of(obj, struct etnaviv_gem_object, base);
  66 }
  67
  68 struct etnaviv_gem_ops {
  69         int (*get_pages)(struct etnaviv_gem_object *);
  70         void (*release)(struct etnaviv_gem_object *);
  71         void *(*vmap)(struct etnaviv_gem_object *);
  72         int (*mmap)(struct etnaviv_gem_object *, struct vm_area_struct *);
  73 };
  74
  75 static inline bool is_active(struct etnaviv_gem_object *etnaviv_obj)
  76 {
  77         return atomic_read(&etnaviv_obj->gpu_active) != 0;
  78 }
  79
  80 #define MAX_CMDS 4
  81
  82 struct etnaviv_gem_submit_bo {
  83         u32 flags;
  84         struct etnaviv_gem_object *obj;
  85         struct etnaviv_vram_mapping *mapping;
  86         struct dma_fence *excl;
  87         unsigned int nr_shared;
  88         struct dma_fence **shared;
  89 };
  90
  91 /* Created per submit-ioctl, to track bo's and cmdstream bufs, etc,
  92  * associated with the cmdstream submission for synchronization (and
  93  * make it easier to unwind when things go wrong, etc).
  94  */
  95 struct etnaviv_gem_submit {
  96         struct drm_sched_job sched_job;
  97         struct kref refcount;
  98         struct etnaviv_gpu *gpu;
  99         struct dma_fence *out_fence, *in_fence;
 100         int out_fence_id;
 101         struct list_head node; /* GPU active submit list */
 102         struct etnaviv_cmdbuf cmdbuf;
 103         bool runtime_resumed;
 104         u32 exec_state;
 105         u32 flags;
 106         unsigned int nr_pmrs;
 107         struct etnaviv_perfmon_request *pmrs;
 108         unsigned int nr_bos;
 109         struct etnaviv_gem_submit_bo bos[0];
 110         /* No new members here, the previous one is variable-length! */
 111 };
 112
 113 void etnaviv_submit_put(struct etnaviv_gem_submit * submit);
 114
 115 int etnaviv_gem_wait_bo(struct etnaviv_gpu *gpu, struct drm_gem_object *obj,
 116         struct timespec *timeout);
 117 int etnaviv_gem_new_private(struct drm_device *dev, size_t size, u32 flags,
 118         struct reservation_object *robj, const struct etnaviv_gem_ops *ops,
 119         struct etnaviv_gem_object **res);
 120 void etnaviv_gem_obj_add(struct drm_device *dev, struct drm_gem_object *obj);
 121 struct page **etnaviv_gem_get_pages(struct etnaviv_gem_object *obj);
 122 void etnaviv_gem_put_pages(struct etnaviv_gem_object *obj);
 123
 124 struct etnaviv_vram_mapping *etnaviv_gem_mapping_get(
 125         struct drm_gem_object *obj, struct etnaviv_gpu *gpu);
 126 void etnaviv_gem_mapping_reference(struct etnaviv_vram_mapping *mapping);
 127 void etnaviv_gem_mapping_unreference(struct etnaviv_vram_mapping *mapping);
 128
 129 #endif /* __ETNAVIV_GEM_H__ */