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_cmdbuf.h"
  22 #include "etnaviv_drv.h"
  23
  24 struct dma_fence;
  25 struct etnaviv_gem_ops;
  26 struct etnaviv_gem_object;
  27
  28 struct etnaviv_gem_userptr {
  29         uintptr_t ptr;
  30         struct mm_struct *mm;
  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).
 102  */
 103 struct etnaviv_gem_submit {
 104         struct kref refcount;
 105         struct etnaviv_gpu *gpu;
 106         struct dma_fence *out_fence, *in_fence;
 107         struct list_head node; /* GPU active submit list */
 108         struct etnaviv_cmdbuf cmdbuf;
 109         bool runtime_resumed;
 110         u32 exec_state;
 111         u32 flags;
 112         unsigned int nr_pmrs;
 113         struct etnaviv_perfmon_request *pmrs;
 114         unsigned int nr_bos;
 115         struct etnaviv_gem_submit_bo bos[0];
 116         /* No new members here, the previous one is variable-length! */
 117 };
 118
 119 void etnaviv_submit_put(struct etnaviv_gem_submit * submit);
 120
 121 int etnaviv_gem_wait_bo(struct etnaviv_gpu *gpu, struct drm_gem_object *obj,
 122         struct timespec *timeout);
 123 int etnaviv_gem_new_private(struct drm_device *dev, size_t size, u32 flags,
 124         struct reservation_object *robj, const struct etnaviv_gem_ops *ops,
 125         struct etnaviv_gem_object **res);
 126 void etnaviv_gem_obj_add(struct drm_device *dev, struct drm_gem_object *obj);
 127 struct page **etnaviv_gem_get_pages(struct etnaviv_gem_object *obj);
 128 void etnaviv_gem_put_pages(struct etnaviv_gem_object *obj);
 129
 130 struct etnaviv_vram_mapping *etnaviv_gem_mapping_get(
 131         struct drm_gem_object *obj, struct etnaviv_gpu *gpu);
 132 void etnaviv_gem_mapping_reference(struct etnaviv_vram_mapping *mapping);
 133 void etnaviv_gem_mapping_unreference(struct etnaviv_vram_mapping *mapping);
 134
 135 #endif /* __ETNAVIV_GEM_H__ */