drivers/video/rockchip/vcodec/vcodec_iommu_ops.c

   1 /**
   2  * Copyright (C) 2016 Fuzhou Rockchip Electronics Co., Ltd
   3  * author: Jung Zhao jung.zhao@rock-chips.com
   4  *         Randy Li, randy.li@rock-chips.com
   5  *
   6  * This software is licensed under the terms of the GNU General Public
   7  * License version 2, as published by the Free Software Foundation, and
   8  * may be copied, distributed, and modified under those terms.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  */
  16
  17 #include <linux/slab.h>
  18
  19 #include "vcodec_iommu_ops.h"
  20
  21 static
  22 struct vcodec_iommu_session_info *vcodec_iommu_get_session_info
  23         (struct vcodec_iommu_info *iommu_info, struct vpu_session *session)
  24 {
  25         struct vcodec_iommu_session_info *session_info = NULL, *n;
  26
  27         list_for_each_entry_safe(session_info, n, &iommu_info->session_list,
  28                                  head) {
  29                 if (session_info->session == session)
  30                         return session_info;
  31         }
  32
  33         return NULL;
  34 }
  35
  36 int vcodec_iommu_create(struct vcodec_iommu_info *iommu_info)
  37 {
  38         if (!iommu_info || !iommu_info->ops->create)
  39                 return -EINVAL;
  40
  41         return iommu_info->ops->create(iommu_info);
  42 }
  43
  44 int vcodec_iommu_import(struct vcodec_iommu_info *iommu_info,
  45                         struct vpu_session *session, int fd)
  46 {
  47         struct vcodec_iommu_session_info *session_info = NULL;
  48
  49         if (!iommu_info || !iommu_info->ops->import || !session)
  50                 return -EINVAL;
  51
  52         session_info = vcodec_iommu_get_session_info(iommu_info, session);
  53         if (!session_info) {
  54                 session_info = kzalloc(sizeof(*session_info), GFP_KERNEL);
  55                 if (!session_info)
  56                         return -ENOMEM;
  57
  58                 INIT_LIST_HEAD(&session_info->head);
  59                 INIT_LIST_HEAD(&session_info->buffer_list);
  60                 mutex_init(&session_info->list_mutex);
  61                 session_info->max_idx = 0;
  62                 session_info->session = session;
  63                 session_info->mmu_dev = iommu_info->mmu_dev;
  64                 session_info->dev = iommu_info->dev;
  65                 session_info->iommu_info = iommu_info;
  66                 mutex_lock(&iommu_info->list_mutex);
  67                 list_add_tail(&session_info->head, &iommu_info->session_list);
  68                 mutex_unlock(&iommu_info->list_mutex);
  69         }
  70
  71         session_info->debug_level = iommu_info->debug_level;
  72
  73         return iommu_info->ops->import(session_info, fd);
  74 }
  75
  76 int vcodec_iommu_free(struct vcodec_iommu_info *iommu_info,
  77                       struct vpu_session *session, int idx)
  78 {
  79         struct vcodec_iommu_session_info *session_info = NULL;
  80
  81         session_info = vcodec_iommu_get_session_info(iommu_info, session);
  82
  83         if (!iommu_info || !iommu_info->ops->free || !session_info)
  84                 return -EINVAL;
  85
  86         return iommu_info->ops->free(session_info, idx);
  87 }
  88
  89 int vcodec_iommu_free_fd(struct vcodec_iommu_info *iommu_info,
  90                          struct vpu_session *session, int fd)
  91 {
  92         struct vcodec_iommu_session_info *session_info = NULL;
  93
  94         session_info = vcodec_iommu_get_session_info(iommu_info, session);
  95
  96         if (!iommu_info || !iommu_info->ops->free_fd || !session_info)
  97                 return -EINVAL;
  98
  99         return iommu_info->ops->free_fd(session_info, fd);
 100 }
 101
 102 void *vcodec_iommu_map_kernel(struct vcodec_iommu_info *iommu_info,
 103                                  struct vpu_session *session, int idx)
 104 {
 105         struct vcodec_iommu_session_info *session_info = NULL;
 106
 107         session_info = vcodec_iommu_get_session_info(iommu_info, session);
 108
 109         if (!iommu_info || !iommu_info->ops->map_kernel || !session_info)
 110                 return NULL;
 111
 112         return iommu_info->ops->map_kernel(session_info, idx);
 113 }
 114
 115 int vcodec_iommu_unmap_kernel(struct vcodec_iommu_info *iommu_info,
 116                               struct vpu_session *session, int idx)
 117 {
 118         struct vcodec_iommu_session_info *session_info = NULL;
 119
 120         session_info = vcodec_iommu_get_session_info(iommu_info, session);
 121
 122         if (!iommu_info || !iommu_info->ops->unmap_kernel || !session_info)
 123                 return -EINVAL;
 124
 125         return iommu_info->ops->unmap_kernel(session_info, idx);
 126 }
 127
 128 int vcodec_iommu_map_iommu(struct vcodec_iommu_info *iommu_info,
 129                            struct vpu_session *session,
 130                            int idx, unsigned long *iova,
 131                            unsigned long *size)
 132 {
 133         struct vcodec_iommu_session_info *session_info = NULL;
 134
 135         session_info = vcodec_iommu_get_session_info(iommu_info, session);
 136
 137         if (!iommu_info || !iommu_info->ops->map_iommu || !session_info)
 138                 return -EINVAL;
 139
 140         return iommu_info->ops->map_iommu(session_info, idx, iova, size);
 141 }
 142
 143 int vcodec_iommu_unmap_iommu(struct vcodec_iommu_info *iommu_info,
 144                              struct vpu_session *session, int idx)
 145 {
 146         struct vcodec_iommu_session_info *session_info = NULL;
 147
 148         session_info = vcodec_iommu_get_session_info(iommu_info, session);
 149
 150         if (!iommu_info || !iommu_info->ops->unmap_iommu || !session_info)
 151                 return -EINVAL;
 152
 153         return iommu_info->ops->unmap_iommu(session_info, idx);
 154 }
 155
 156 int vcodec_iommu_destroy(struct vcodec_iommu_info *iommu_info)
 157 {
 158         if (!iommu_info || !iommu_info->ops->destroy)
 159                 return -EINVAL;
 160
 161         return iommu_info->ops->destroy(iommu_info);
 162 }
 163
 164 void vcodec_iommu_dump(struct vcodec_iommu_info *iommu_info,
 165                        struct vpu_session *session)
 166 {
 167         struct vcodec_iommu_session_info *session_info = NULL;
 168
 169         session_info = vcodec_iommu_get_session_info(iommu_info, session);
 170
 171         if (!iommu_info || !iommu_info->ops->dump || !session_info)
 172                 return;
 173
 174         iommu_info->ops->dump(session_info);
 175 }
 176
 177 void vcodec_iommu_clear(struct vcodec_iommu_info *iommu_info,
 178                         struct vpu_session *session)
 179 {
 180         struct vcodec_iommu_session_info *session_info = NULL;
 181
 182         session_info = vcodec_iommu_get_session_info(iommu_info, session);
 183
 184         if (!iommu_info || !iommu_info->ops->clear || !session_info)
 185                 return;
 186
 187         iommu_info->ops->clear(session_info);
 188
 189         mutex_lock(&iommu_info->list_mutex);
 190         list_del_init(&session_info->head);
 191         kfree(session_info);
 192         mutex_unlock(&iommu_info->list_mutex);
 193 }
 194
 195 int vcodec_iommu_attach(struct vcodec_iommu_info *iommu_info)
 196 {
 197         if (!iommu_info || !iommu_info->ops->attach)
 198                 return 0;
 199
 200         return iommu_info->ops->attach(iommu_info);
 201 }
 202
 203 void vcodec_iommu_detach(struct vcodec_iommu_info *iommu_info)
 204 {
 205         if (!iommu_info || !iommu_info->ops->detach)
 206                 return;
 207
 208         return iommu_info->ops->detach(iommu_info);
 209 }
 210
 211 struct vcodec_iommu_info *
 212 vcodec_iommu_info_create(struct device *dev,
 213                          struct device *mmu_dev,
 214                          int alloc_type)
 215 {
 216         struct vcodec_iommu_info *iommu_info = NULL;
 217
 218         iommu_info = kzalloc(sizeof(*iommu_info), GFP_KERNEL);
 219         if (!iommu_info)
 220                 return NULL;
 221
 222         iommu_info->dev = dev;
 223         INIT_LIST_HEAD(&iommu_info->session_list);
 224         mutex_init(&iommu_info->list_mutex);
 225         mutex_init(&iommu_info->iommu_mutex);
 226         switch (alloc_type) {
 227 #ifdef CONFIG_DRM
 228         case ALLOCATOR_USE_DRM:
 229                 vcodec_iommu_drm_set_ops(iommu_info);
 230                 break;
 231 #endif
 232 #ifdef CONFIG_ION
 233         case ALLOCATOR_USE_ION:
 234                 vcodec_iommu_ion_set_ops(iommu_info);
 235                 break;
 236 #endif
 237         default:
 238                 iommu_info->ops = NULL;
 239                 break;
 240         }
 241
 242         iommu_info->mmu_dev = mmu_dev;
 243
 244         vcodec_iommu_create(iommu_info);
 245
 246         return iommu_info;
 247 }
 248
 249 int vcodec_iommu_info_destroy(struct vcodec_iommu_info *iommu_info)
 250 {
 251         vcodec_iommu_destroy(iommu_info);
 252         kfree(iommu_info);
 253
 254         return 0;
 255 }