LXR linux/drivers/gpu/drm/etnaviv/etnaviv

   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
  23struct etnaviv_gem_ops;
  24struct etnaviv_gem_object;
  25
  26struct etnaviv_gem_userptr {
  27        uintptr_t ptr;
  28        struct task_struct *task;
  29        struct work_struct *work;
  30        bool ro;
  31};
  32
  33struct 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
  44struct 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
  72static inline
  73struct etnaviv_gem_object *to_etnaviv_bo(struct drm_gem_object *obj)
  74{
  75        return container_of(obj, struct etnaviv_gem_object, base);
  76}
  77
  78struct 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
  85static 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
  92struct 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 */
 103struct 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
 112int etnaviv_gem_wait_bo(struct etnaviv_gpu *gpu, struct drm_gem_object *obj,
 113        struct timespec *timeout);
 114int 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);
 117int etnaviv_gem_obj_add(struct drm_device *dev, struct drm_gem_object *obj);
 118struct page **etnaviv_gem_get_pages(struct etnaviv_gem_object *obj);
 119void etnaviv_gem_put_pages(struct etnaviv_gem_object *obj);
 120
 121struct etnaviv_vram_mapping *etnaviv_gem_mapping_get(
 122        struct drm_gem_object *obj, struct etnaviv_gpu *gpu);
 123void etnaviv_gem_mapping_reference(struct etnaviv_vram_mapping *mapping);
 124void etnaviv_gem_mapping_unreference(struct etnaviv_vram_mapping *mapping);
 125
 126#endif /* __ETNAVIV_GEM_H__ */
 127