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__ */