drivers/gpu/drm/etnaviv/etnaviv_gem.h

   1 /*
   2  * Copyright (C) 2015 Etnaviv Project
   3  *
   4  * This program is free software; you can redistribute it and/or modify it
   5  * under the terms of the GNU General Public License version 2 as published by
   6  * the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope that it will be useful, but WITHOUT
   9  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  10  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  11  * more details.
  12  *
  13  * You should have received a copy of the GNU General Public License along with
  14  * this program.  If not, see <http://www.gnu.org/licenses/>.
  15  */
  16
  17 #ifndef __ETNAVIV_GEM_H__
  18 #define __ETNAVIV_GEM_H__
  19
  20 #include <linux/reservation.h>
  21 #include "etnaviv_drv.h"
  22
  23 struct dma_fence;
  24 struct etnaviv_gem_ops;
  25 struct etnaviv_gem_object;
  26
  27 struct etnaviv_gem_userptr {
  28         uintptr_t ptr;
  29         struct task_struct *task;
  30         struct work_struct *work;
  31         bool ro;
  32 };
  33
  34 struct etnaviv_vram_mapping {
  35         struct list_head obj_node;
  36         struct list_head scan_node;
  37         struct list_head mmu_node;
  38         struct etnaviv_gem_object *object;
  39         struct etnaviv_iommu *mmu;
  40         struct drm_mm_node vram_node;
  41         unsigned int use;
  42         u32 iova;
  43 };
  44
  45 struct etnaviv_gem_object {
  46         struct drm_gem_object base;
  47         const struct etnaviv_gem_ops *ops;
  48         struct mutex lock;
  49
  50         u32 flags;
  51
  52         struct list_head gem_node;
  53         struct etnaviv_gpu *gpu;     /* non-null if active */
  54         atomic_t gpu_active;
  55         u32 access;
  56
  57         struct page **pages;
  58         struct sg_table *sgt;
  59         void *vaddr;
  60
  61         /* normally (resv == &_resv) except for imported bo's */
  62         struct reservation_object *resv;
  63         struct reservation_object _resv;
  64
  65         struct list_head vram_list;
  66
  67         /* cache maintenance */
  68         u32 last_cpu_prep_op;
  69
  70         struct etnaviv_gem_userptr userptr;
  71 };
  72
  73 static inline
  74 struct etnaviv_gem_object *to_etnaviv_bo(struct drm_gem_object *obj)
  75 {
  76         return container_of(obj, struct etnaviv_gem_object, base);
  77 }
  78
  79 struct etnaviv_gem_ops {
  80         int (*get_pages)(struct etnaviv_gem_object *);
  81         void (*release)(struct etnaviv_gem_object *);
  82         void *(*vmap)(struct etnaviv_gem_object *);
  83         int (*mmap)(struct etnaviv_gem_object *, struct vm_area_struct *);
  84 };
  85
  86 static inline bool is_active(struct etnaviv_gem_object *etnaviv_obj)
  87 {
  88         return atomic_read(&etnaviv_obj->gpu_active) != 0;
  89 }
  90
  91 #define MAX_CMDS 4
  92
  93 struct etnaviv_gem_submit_bo {
  94         u32 flags;
  95         struct etnaviv_gem_object *obj;
  96         struct etnaviv_vram_mapping *mapping;
  97 };
  98
  99 /* Created per submit-ioctl, to track bo's and cmdstream bufs, etc,
 100  * associated with the cmdstream submission for synchronization (and
 101  * make it easier to unwind when things go wrong, etc).  This only
 102  * lasts for the duration of the submit-ioctl.
 103  */
 104 struct etnaviv_gem_submit {
 105         struct drm_device *dev;
 106         struct etnaviv_gpu *gpu;
 107         struct ww_acquire_ctx ticket;
 108         struct dma_fence *fence;
 109         u32 flags;
 110         unsigned int nr_bos;
 111         struct etnaviv_gem_submit_bo bos[0];
 112         /* No new members here, the previous one is variable-length! */
 113 };
 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 int 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__ */