LXR linux/drivers/gpu/drm/msm/msm

   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