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 etnaviv_gem_ops;
  24 struct etnaviv_gem_object;
  25
  26 struct etnaviv_gem_userptr {
  27         uintptr_t ptr;
  28         struct task_struct *task;
  29         struct work_struct *work;
  30         bool ro;
  31 };
  32
  33 struct etnaviv_vram_mapping {
  34         struct list_head obj_node;
  35         struct list_head scan_node;
  36         struct list_head mmu_node;
  37         struct etnaviv_gem_object *object;
  38         struct etnaviv_iommu *mmu;
  39         struct drm_mm_node vram_node;
  40         unsigned int use;
  41         u32 iova;
  42 };
  43
  44 struct etnaviv_gem_object {
  45         struct drm_gem_object base;
  46         const struct etnaviv_gem_ops *ops;
  47         struct mutex lock;
  48
  49         u32 flags;
  50
  51         struct list_head gem_node;
  52         struct etnaviv_gpu *gpu;     /* non-null if active */
  53         atomic_t gpu_active;
  54         u32 access;
  55
  56         struct page **pages;
  57         struct sg_table *sgt;
  58         void *vaddr;
  59
  60         /* normally (resv == &_resv) except for imported bo's */
  61         struct reservation_object *resv;
  62         struct reservation_object _resv;
  63
  64         struct list_head vram_list;
  65
  66         /* cache maintenance */
  67         u32 last_cpu_prep_op;
  68
  69         struct etnaviv_gem_userptr userptr;
  70 };
  71
  72 static inline
  73 struct etnaviv_gem_object *to_etnaviv_bo(struct drm_gem_object *obj)
  74 {
  75         return container_of(obj, struct etnaviv_gem_object, base);
  76 }
  77
  78 struct etnaviv_gem_ops {
  79         int (*get_pages)(struct etnaviv_gem_object *);
  80         void (*release)(struct etnaviv_gem_object *);
  81         void *(*vmap)(struct etnaviv_gem_object *);
  82         int (*mmap)(struct etnaviv_gem_object *, struct vm_area_struct *);
  83 };
  84
  85 static inline bool is_active(struct etnaviv_gem_object *etnaviv_obj)
  86 {
  87         return atomic_read(&etnaviv_obj->gpu_active) != 0;
  88 }
  89
  90 #define MAX_CMDS 4
  91
  92 struct etnaviv_gem_submit_bo {
  93         u32 flags;
  94         struct etnaviv_gem_object *obj;
  95         struct etnaviv_vram_mapping *mapping;
  96 };
  97
  98 /* Created per submit-ioctl, to track bo's and cmdstream bufs, etc,
  99  * associated with the cmdstream submission for synchronization (and
 100  * make it easier to unwind when things go wrong, etc).  This only
 101  * lasts for the duration of the submit-ioctl.
 102  */
 103 struct etnaviv_gem_submit {
 104         struct drm_device *dev;
 105         struct etnaviv_gpu *gpu;
 106         struct ww_acquire_ctx ticket;
 107         u32 fence;
 108         unsigned int nr_bos;
 109         struct etnaviv_gem_submit_bo bos[0];
 110 };
 111
 112 int etnaviv_gem_wait_bo(struct etnaviv_gpu *gpu, struct drm_gem_object *obj,
 113         struct timespec *timeout);
 114 int etnaviv_gem_new_private(struct drm_device *dev, size_t size, u32 flags,
 115         struct reservation_object *robj, const struct etnaviv_gem_ops *ops,
 116         struct etnaviv_gem_object **res);
 117 int etnaviv_gem_obj_add(struct drm_device *dev, struct drm_gem_object *obj);
 118 struct page **etnaviv_gem_get_pages(struct etnaviv_gem_object *obj);
 119 void etnaviv_gem_put_pages(struct etnaviv_gem_object *obj);
 120
 121 struct etnaviv_vram_mapping *etnaviv_gem_mapping_get(
 122         struct drm_gem_object *obj, struct etnaviv_gpu *gpu);
 123 void etnaviv_gem_mapping_reference(struct etnaviv_vram_mapping *mapping);
 124 void etnaviv_gem_mapping_unreference(struct etnaviv_vram_mapping *mapping);
 125
 126 #endif /* __ETNAVIV_GEM_H__ */