drivers/gpu/drm/msm/msm_gem.h

   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
  27 struct 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
  71 static inline bool is_active(struct msm_gem_object *msm_obj)
  72 {
  73         return msm_obj->gpu != NULL;
  74 }
  75
  76 static 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  */
  96 struct 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__ */