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 struct msm_gem_object {
  25         struct drm_gem_object base;
  26
  27         uint32_t flags;
  28
  29         /* And object is either:
  30          *  inactive - on priv->inactive_list
  31          *  active   - on one one of the gpu's active_list..  well, at
  32          *     least for now we don't have (I don't think) hw sync between
  33          *     2d and 3d one devices which have both, meaning we need to
  34          *     block on submit if a bo is already on other ring
  35          *
  36          */
  37         struct list_head mm_list;
  38         struct msm_gpu *gpu;     /* non-null if active */
  39         uint32_t read_fence, write_fence;
  40
  41         /* Transiently in the process of submit ioctl, objects associated
  42          * with the submit are on submit->bo_list.. this only lasts for
  43          * the duration of the ioctl, so one bo can never be on multiple
  44          * submit lists.
  45          */
  46         struct list_head submit_entry;
  47
  48         struct page **pages;
  49         struct sg_table *sgt;
  50         void *vaddr;
  51
  52         struct {
  53                 // XXX
  54                 uint32_t iova;
  55         } domain[NUM_DOMAINS];
  56
  57         /* normally (resv == &_resv) except for imported bo's */
  58         struct reservation_object *resv;
  59         struct reservation_object _resv;
  60
  61         /* For physically contiguous buffers.  Used when we don't have
  62          * an IOMMU.
  63          */
  64         struct drm_mm_node *vram_node;
  65 };
  66 #define to_msm_bo(x) container_of(x, struct msm_gem_object, base)
  67
  68 static inline bool is_active(struct msm_gem_object *msm_obj)
  69 {
  70         return msm_obj->gpu != NULL;
  71 }
  72
  73 static inline uint32_t msm_gem_fence(struct msm_gem_object *msm_obj,
  74                 uint32_t op)
  75 {
  76         uint32_t fence = 0;
  77
  78         if (op & MSM_PREP_READ)
  79                 fence = msm_obj->write_fence;
  80         if (op & MSM_PREP_WRITE)
  81                 fence = max(fence, msm_obj->read_fence);
  82
  83         return fence;
  84 }
  85
  86 #define MAX_CMDS 4
  87
  88 /* Created per submit-ioctl, to track bo's and cmdstream bufs, etc,
  89  * associated with the cmdstream submission for synchronization (and
  90  * make it easier to unwind when things go wrong, etc).  This only
  91  * lasts for the duration of the submit-ioctl.
  92  */
  93 struct msm_gem_submit {
  94         struct drm_device *dev;
  95         struct msm_gpu *gpu;
  96         struct list_head bo_list;
  97         struct ww_acquire_ctx ticket;
  98         uint32_t fence;
  99         bool valid;
 100         unsigned int nr_cmds;
 101         unsigned int nr_bos;
 102         struct {
 103                 uint32_t type;
 104                 uint32_t size;  /* in dwords */
 105                 uint32_t iova;
 106                 uint32_t idx;   /* cmdstream buffer idx in bos[] */
 107         } cmd[MAX_CMDS];
 108         struct {
 109                 uint32_t flags;
 110                 struct msm_gem_object *obj;
 111                 uint32_t iova;
 112         } bos[0];
 113 };
 114
 115 #endif /* __MSM_GEM_H__ */