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        /**
  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
  80static inline bool is_active(struct msm_gem_object *msm_obj)
  81{
  82        return msm_obj->gpu != NULL;
  83}
  84
  85static 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
  91static 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 */
 101struct 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__ */
 126