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__ */