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         /**
  33          * Advice: are the backing pages purgeable?
  34          */
  35         uint8_t madv;
  36
  37         /**
  38          * count of active vmap'ing
  39          */
  40         uint8_t vmap_count;
  41
  42         /* And object is either:
  43          *  inactive - on priv->inactive_list
  44          *  active   - on one one of the gpu's active_list..  well, at
  45          *     least for now we don't have (I don't think) hw sync between
  46          *     2d and 3d one devices which have both, meaning we need to
  47          *     block on submit if a bo is already on other ring
  48          *
  49          */
  50         struct list_head mm_list;
  51         struct msm_gpu *gpu;     /* non-null if active */
  52
  53         /* Transiently in the process of submit ioctl, objects associated
  54          * with the submit are on submit->bo_list.. this only lasts for
  55          * the duration of the ioctl, so one bo can never be on multiple
  56          * submit lists.
  57          */
  58         struct list_head submit_entry;
  59
  60         struct page **pages;
  61         struct sg_table *sgt;
  62         void *vaddr;
  63
  64         struct {
  65                 // XXX
  66                 uint32_t iova;
  67         } domain[NUM_DOMAINS];
  68
  69         /* normally (resv == &_resv) except for imported bo's */
  70         struct reservation_object *resv;
  71         struct reservation_object _resv;
  72
  73         /* For physically contiguous buffers.  Used when we don't have
  74          * an IOMMU.  Also used for stolen/splashscreen buffer.
  75          */
  76         struct drm_mm_node *vram_node;
  77 };
  78 #define to_msm_bo(x) container_of(x, struct msm_gem_object, base)
  79
  80 static inline bool is_active(struct msm_gem_object *msm_obj)
  81 {
  82         return msm_obj->gpu != NULL;
  83 }
  84
  85 static inline bool is_purgeable(struct msm_gem_object *msm_obj)
  86 {
  87         return (msm_obj->madv == MSM_MADV_DONTNEED) && msm_obj->sgt &&
  88                         !msm_obj->base.dma_buf && !msm_obj->base.import_attach;
  89 }
  90
  91 static inline bool is_vunmapable(struct msm_gem_object *msm_obj)
  92 {
  93         return (msm_obj->vmap_count == 0) && msm_obj->vaddr;
  94 }
  95
  96 /* Created per submit-ioctl, to track bo's and cmdstream bufs, etc,
  97  * associated with the cmdstream submission for synchronization (and
  98  * make it easier to unwind when things go wrong, etc).  This only
  99  * lasts for the duration of the submit-ioctl.
 100  */
 101 struct msm_gem_submit {
 102         struct drm_device *dev;
 103         struct msm_gpu *gpu;
 104         struct list_head node;   /* node in gpu submit_list */
 105         struct list_head bo_list;
 106         struct ww_acquire_ctx ticket;
 107         struct fence *fence;
 108         struct pid *pid;    /* submitting process */
 109         bool valid;         /* true if no cmdstream patching needed */
 110         unsigned int nr_cmds;
 111         unsigned int nr_bos;
 112         struct {
 113                 uint32_t type;
 114                 uint32_t size;  /* in dwords */
 115                 uint32_t iova;
 116                 uint32_t idx;   /* cmdstream buffer idx in bos[] */
 117         } *cmd;  /* array of size nr_cmds */
 118         struct {
 119                 uint32_t flags;
 120                 struct msm_gem_object *obj;
 121                 uint32_t iova;
 122         } bos[0];
 123 };
 124
 125 #endif /* __MSM_GEM_H__ */