1/*
2 * Copyright (C) 2013 Red Hat
3 * Author: Rob Clark <robdclark@gmail.com>
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 as published by
7 * the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
12 * more details.
13 *
14 * You should have received a copy of the GNU General Public License along with
15 * this program.  If not, see <http://www.gnu.org/licenses/>.
16 */
17
18#ifndef __MSM_GEM_H__
19#define __MSM_GEM_H__
20
21#include <linux/reservation.h>
22#include "msm_drv.h"
23
24/* Additional internal-use only BO flags: */
25#define MSM_BO_STOLEN        0x10000000    /* try to use stolen/splash memory */
26
27struct msm_gem_object {
28	struct drm_gem_object base;
29
30	uint32_t flags;
31
32	/* And object is either:
33	 *  inactive - on priv->inactive_list
34	 *  active   - on one one of the gpu's active_list..  well, at
35	 *     least for now we don't have (I don't think) hw sync between
36	 *     2d and 3d one devices which have both, meaning we need to
37	 *     block on submit if a bo is already on other ring
38	 *
39	 */
40	struct list_head mm_list;
41	struct msm_gpu *gpu;     /* non-null if active */
42	uint32_t read_fence, write_fence;
43
44	/* Transiently in the process of submit ioctl, objects associated
45	 * with the submit are on submit->bo_list.. this only lasts for
46	 * the duration of the ioctl, so one bo can never be on multiple
47	 * submit lists.
48	 */
49	struct list_head submit_entry;
50
51	struct page **pages;
52	struct sg_table *sgt;
53	void *vaddr;
54
55	struct {
56		// XXX
57		uint32_t iova;
58	} domain[NUM_DOMAINS];
59
60	/* normally (resv == &_resv) except for imported bo's */
61	struct reservation_object *resv;
62	struct reservation_object _resv;
63
64	/* For physically contiguous buffers.  Used when we don't have
65	 * an IOMMU.  Also used for stolen/splashscreen buffer.
66	 */
67	struct drm_mm_node *vram_node;
68};
69#define to_msm_bo(x) container_of(x, struct msm_gem_object, base)
70
71static inline bool is_active(struct msm_gem_object *msm_obj)
72{
73	return msm_obj->gpu != NULL;
74}
75
76static inline uint32_t msm_gem_fence(struct msm_gem_object *msm_obj,
77		uint32_t op)
78{
79	uint32_t fence = 0;
80
81	if (op & MSM_PREP_READ)
82		fence = msm_obj->write_fence;
83	if (op & MSM_PREP_WRITE)
84		fence = max(fence, msm_obj->read_fence);
85
86	return fence;
87}
88
89#define MAX_CMDS 4
90
91/* Created per submit-ioctl, to track bo's and cmdstream bufs, etc,
92 * associated with the cmdstream submission for synchronization (and
93 * make it easier to unwind when things go wrong, etc).  This only
94 * lasts for the duration of the submit-ioctl.
95 */
96struct msm_gem_submit {
97	struct drm_device *dev;
98	struct msm_gpu *gpu;
99	struct list_head node;   /* node in gpu submit_list */
100	struct list_head bo_list;
101	struct ww_acquire_ctx ticket;
102	uint32_t fence;
103	bool valid;
104	unsigned int nr_cmds;
105	unsigned int nr_bos;
106	struct {
107		uint32_t type;
108		uint32_t size;  /* in dwords */
109		uint32_t iova;
110		uint32_t idx;   /* cmdstream buffer idx in bos[] */
111	} cmd[MAX_CMDS];
112	struct {
113		uint32_t flags;
114		struct msm_gem_object *obj;
115		uint32_t iova;
116	} bos[0];
117};
118
119#endif /* __MSM_GEM_H__ */
120