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 dma_fence;
  24struct etnaviv_gem_ops;
  25struct etnaviv_gem_object;
  26
  27struct etnaviv_gem_userptr {
  28        uintptr_t ptr;
  29        struct task_struct *task;
  30        struct work_struct *work;
  31        bool ro;
  32};
  33
  34struct 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
  45struct 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
  73static inline
  74struct etnaviv_gem_object *to_etnaviv_bo(struct drm_gem_object *obj)
  75{
  76        return container_of(obj, struct etnaviv_gem_object, base);
  77}
  78
  79struct 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
  86static 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
  93struct 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 */
 104struct 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
 115int etnaviv_gem_wait_bo(struct etnaviv_gpu *gpu, struct drm_gem_object *obj,
 116        struct timespec *timeout);
 117int 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);
 120int etnaviv_gem_obj_add(struct drm_device *dev, struct drm_gem_object *obj);
 121struct page **etnaviv_gem_get_pages(struct etnaviv_gem_object *obj);
 122void etnaviv_gem_put_pages(struct etnaviv_gem_object *obj);
 123
 124struct etnaviv_vram_mapping *etnaviv_gem_mapping_get(
 125        struct drm_gem_object *obj, struct etnaviv_gpu *gpu);
 126void etnaviv_gem_mapping_reference(struct etnaviv_vram_mapping *mapping);
 127void etnaviv_gem_mapping_unreference(struct etnaviv_vram_mapping *mapping);
 128
 129#endif /* __ETNAVIV_GEM_H__ */
 130