drivers/gpu/drm/amd/amdgpu/amdgpu_bo_list.c

   1 /*
   2  * Copyright 2015 Advanced Micro Devices, Inc.
   3  * All Rights Reserved.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the
   7  * "Software"), to deal in the Software without restriction, including
   8  * without limitation the rights to use, copy, modify, merge, publish,
   9  * distribute, sub license, and/or sell copies of the Software, and to
  10  * permit persons to whom the Software is furnished to do so, subject to
  11  * the following conditions:
  12  *
  13  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  14  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  15  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  16  * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
  17  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  18  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  19  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  20  *
  21  * The above copyright notice and this permission notice (including the
  22  * next paragraph) shall be included in all copies or substantial portions
  23  * of the Software.
  24  *
  25  */
  26 /*
  27  * Authors:
  28  *    Christian König <deathsimple@vodafone.de>
  29  */
  30
  31 #include <drm/drmP.h>
  32 #include "amdgpu.h"
  33 #include "amdgpu_trace.h"
  34
  35 #define AMDGPU_BO_LIST_MAX_PRIORITY     32u
  36 #define AMDGPU_BO_LIST_NUM_BUCKETS      (AMDGPU_BO_LIST_MAX_PRIORITY + 1)
  37
  38 static int amdgpu_bo_list_set(struct amdgpu_device *adev,
  39                                      struct drm_file *filp,
  40                                      struct amdgpu_bo_list *list,
  41                                      struct drm_amdgpu_bo_list_entry *info,
  42                                      unsigned num_entries);
  43
  44 static void amdgpu_bo_list_release_rcu(struct kref *ref)
  45 {
  46         unsigned i;
  47         struct amdgpu_bo_list *list = container_of(ref, struct amdgpu_bo_list,
  48                                                    refcount);
  49
  50         for (i = 0; i < list->num_entries; ++i)
  51                 amdgpu_bo_unref(&list->array[i].robj);
  52
  53         mutex_destroy(&list->lock);
  54         kvfree(list->array);
  55         kfree_rcu(list, rhead);
  56 }
  57
  58 static int amdgpu_bo_list_create(struct amdgpu_device *adev,
  59                                  struct drm_file *filp,
  60                                  struct drm_amdgpu_bo_list_entry *info,
  61                                  unsigned num_entries,
  62                                  int *id)
  63 {
  64         int r;
  65         struct amdgpu_fpriv *fpriv = filp->driver_priv;
  66         struct amdgpu_bo_list *list;
  67
  68         list = kzalloc(sizeof(struct amdgpu_bo_list), GFP_KERNEL);
  69         if (!list)
  70                 return -ENOMEM;
  71
  72         /* initialize bo list*/
  73         mutex_init(&list->lock);
  74         kref_init(&list->refcount);
  75         r = amdgpu_bo_list_set(adev, filp, list, info, num_entries);
  76         if (r) {
  77                 kfree(list);
  78                 return r;
  79         }
  80
  81         /* idr alloc should be called only after initialization of bo list. */
  82         mutex_lock(&fpriv->bo_list_lock);
  83         r = idr_alloc(&fpriv->bo_list_handles, list, 1, 0, GFP_KERNEL);
  84         mutex_unlock(&fpriv->bo_list_lock);
  85         if (r < 0) {
  86                 kfree(list);
  87                 return r;
  88         }
  89         *id = r;
  90
  91         return 0;
  92 }
  93
  94 static void amdgpu_bo_list_destroy(struct amdgpu_fpriv *fpriv, int id)
  95 {
  96         struct amdgpu_bo_list *list;
  97
  98         mutex_lock(&fpriv->bo_list_lock);
  99         list = idr_remove(&fpriv->bo_list_handles, id);
 100         mutex_unlock(&fpriv->bo_list_lock);
 101         if (list)
 102                 kref_put(&list->refcount, amdgpu_bo_list_release_rcu);
 103 }
 104
 105 static int amdgpu_bo_list_set(struct amdgpu_device *adev,
 106                                      struct drm_file *filp,
 107                                      struct amdgpu_bo_list *list,
 108                                      struct drm_amdgpu_bo_list_entry *info,
 109                                      unsigned num_entries)
 110 {
 111         struct amdgpu_bo_list_entry *array;
 112         struct amdgpu_bo *gds_obj = adev->gds.gds_gfx_bo;
 113         struct amdgpu_bo *gws_obj = adev->gds.gws_gfx_bo;
 114         struct amdgpu_bo *oa_obj = adev->gds.oa_gfx_bo;
 115
 116         unsigned last_entry = 0, first_userptr = num_entries;
 117         unsigned i;
 118         int r;
 119         unsigned long total_size = 0;
 120
 121         array = kvmalloc_array(num_entries, sizeof(struct amdgpu_bo_list_entry), GFP_KERNEL);
 122         if (!array)
 123                 return -ENOMEM;
 124         memset(array, 0, num_entries * sizeof(struct amdgpu_bo_list_entry));
 125
 126         for (i = 0; i < num_entries; ++i) {
 127                 struct amdgpu_bo_list_entry *entry;
 128                 struct drm_gem_object *gobj;
 129                 struct amdgpu_bo *bo;
 130                 struct mm_struct *usermm;
 131
 132                 gobj = drm_gem_object_lookup(filp, info[i].bo_handle);
 133                 if (!gobj) {
 134                         r = -ENOENT;
 135                         goto error_free;
 136                 }
 137
 138                 bo = amdgpu_bo_ref(gem_to_amdgpu_bo(gobj));
 139                 drm_gem_object_unreference_unlocked(gobj);
 140
 141                 usermm = amdgpu_ttm_tt_get_usermm(bo->tbo.ttm);
 142                 if (usermm) {
 143                         if (usermm != current->mm) {
 144                                 amdgpu_bo_unref(&bo);
 145                                 r = -EPERM;
 146                                 goto error_free;
 147                         }
 148                         entry = &array[--first_userptr];
 149                 } else {
 150                         entry = &array[last_entry++];
 151                 }
 152
 153                 entry->robj = bo;
 154                 entry->priority = min(info[i].bo_priority,
 155                                       AMDGPU_BO_LIST_MAX_PRIORITY);
 156                 entry->tv.bo = &entry->robj->tbo;
 157                 entry->tv.shared = !entry->robj->prime_shared_count;
 158
 159                 if (entry->robj->prefered_domains == AMDGPU_GEM_DOMAIN_GDS)
 160                         gds_obj = entry->robj;
 161                 if (entry->robj->prefered_domains == AMDGPU_GEM_DOMAIN_GWS)
 162                         gws_obj = entry->robj;
 163                 if (entry->robj->prefered_domains == AMDGPU_GEM_DOMAIN_OA)
 164                         oa_obj = entry->robj;
 165
 166                 total_size += amdgpu_bo_size(entry->robj);
 167                 trace_amdgpu_bo_list_set(list, entry->robj);
 168         }
 169
 170         for (i = 0; i < list->num_entries; ++i)
 171                 amdgpu_bo_unref(&list->array[i].robj);
 172
 173         kvfree(list->array);
 174
 175         list->gds_obj = gds_obj;
 176         list->gws_obj = gws_obj;
 177         list->oa_obj = oa_obj;
 178         list->first_userptr = first_userptr;
 179         list->array = array;
 180         list->num_entries = num_entries;
 181
 182         trace_amdgpu_cs_bo_status(list->num_entries, total_size);
 183         return 0;
 184
 185 error_free:
 186         while (i--)
 187                 amdgpu_bo_unref(&array[i].robj);
 188         kvfree(array);
 189         return r;
 190 }
 191
 192 struct amdgpu_bo_list *
 193 amdgpu_bo_list_get(struct amdgpu_fpriv *fpriv, int id)
 194 {
 195         struct amdgpu_bo_list *result;
 196
 197         rcu_read_lock();
 198         result = idr_find(&fpriv->bo_list_handles, id);
 199
 200         if (result) {
 201                 if (kref_get_unless_zero(&result->refcount))
 202                         mutex_lock(&result->lock);
 203                 else
 204                         result = NULL;
 205         }
 206         rcu_read_unlock();
 207
 208         return result;
 209 }
 210
 211 void amdgpu_bo_list_get_list(struct amdgpu_bo_list *list,
 212                              struct list_head *validated)
 213 {
 214         /* This is based on the bucket sort with O(n) time complexity.
 215          * An item with priority "i" is added to bucket[i]. The lists are then
 216          * concatenated in descending order.
 217          */
 218         struct list_head bucket[AMDGPU_BO_LIST_NUM_BUCKETS];
 219         unsigned i;
 220
 221         for (i = 0; i < AMDGPU_BO_LIST_NUM_BUCKETS; i++)
 222                 INIT_LIST_HEAD(&bucket[i]);
 223
 224         /* Since buffers which appear sooner in the relocation list are
 225          * likely to be used more often than buffers which appear later
 226          * in the list, the sort mustn't change the ordering of buffers
 227          * with the same priority, i.e. it must be stable.
 228          */
 229         for (i = 0; i < list->num_entries; i++) {
 230                 unsigned priority = list->array[i].priority;
 231
 232                 list_add_tail(&list->array[i].tv.head,
 233                               &bucket[priority]);
 234                 list->array[i].user_pages = NULL;
 235         }
 236
 237         /* Connect the sorted buckets in the output list. */
 238         for (i = 0; i < AMDGPU_BO_LIST_NUM_BUCKETS; i++)
 239                 list_splice(&bucket[i], validated);
 240 }
 241
 242 void amdgpu_bo_list_put(struct amdgpu_bo_list *list)
 243 {
 244         mutex_unlock(&list->lock);
 245         kref_put(&list->refcount, amdgpu_bo_list_release_rcu);
 246 }
 247
 248 void amdgpu_bo_list_free(struct amdgpu_bo_list *list)
 249 {
 250         unsigned i;
 251
 252         for (i = 0; i < list->num_entries; ++i)
 253                 amdgpu_bo_unref(&list->array[i].robj);
 254
 255         mutex_destroy(&list->lock);
 256         kvfree(list->array);
 257         kfree(list);
 258 }
 259
 260 int amdgpu_bo_list_ioctl(struct drm_device *dev, void *data,
 261                                 struct drm_file *filp)
 262 {
 263         const uint32_t info_size = sizeof(struct drm_amdgpu_bo_list_entry);
 264
 265         struct amdgpu_device *adev = dev->dev_private;
 266         struct amdgpu_fpriv *fpriv = filp->driver_priv;
 267         union drm_amdgpu_bo_list *args = data;
 268         uint32_t handle = args->in.list_handle;
 269         const void __user *uptr = (const void*)(uintptr_t)args->in.bo_info_ptr;
 270
 271         struct drm_amdgpu_bo_list_entry *info;
 272         struct amdgpu_bo_list *list;
 273
 274         int r;
 275
 276         info = kvmalloc_array(args->in.bo_number,
 277                              sizeof(struct drm_amdgpu_bo_list_entry), GFP_KERNEL);
 278         if (!info)
 279                 return -ENOMEM;
 280
 281         /* copy the handle array from userspace to a kernel buffer */
 282         r = -EFAULT;
 283         if (likely(info_size == args->in.bo_info_size)) {
 284                 unsigned long bytes = args->in.bo_number *
 285                         args->in.bo_info_size;
 286
 287                 if (copy_from_user(info, uptr, bytes))
 288                         goto error_free;
 289
 290         } else {
 291                 unsigned long bytes = min(args->in.bo_info_size, info_size);
 292                 unsigned i;
 293
 294                 memset(info, 0, args->in.bo_number * info_size);
 295                 for (i = 0; i < args->in.bo_number; ++i) {
 296                         if (copy_from_user(&info[i], uptr, bytes))
 297                                 goto error_free;
 298
 299                         uptr += args->in.bo_info_size;
 300                 }
 301         }
 302
 303         switch (args->in.operation) {
 304         case AMDGPU_BO_LIST_OP_CREATE:
 305                 r = amdgpu_bo_list_create(adev, filp, info, args->in.bo_number,
 306                                           &handle);
 307                 if (r)
 308                         goto error_free;
 309                 break;
 310
 311         case AMDGPU_BO_LIST_OP_DESTROY:
 312                 amdgpu_bo_list_destroy(fpriv, handle);
 313                 handle = 0;
 314                 break;
 315
 316         case AMDGPU_BO_LIST_OP_UPDATE:
 317                 r = -ENOENT;
 318                 list = amdgpu_bo_list_get(fpriv, handle);
 319                 if (!list)
 320                         goto error_free;
 321
 322                 r = amdgpu_bo_list_set(adev, filp, list, info,
 323                                               args->in.bo_number);
 324                 amdgpu_bo_list_put(list);
 325                 if (r)
 326                         goto error_free;
 327
 328                 break;
 329
 330         default:
 331                 r = -EINVAL;
 332                 goto error_free;
 333         }
 334
 335         memset(args, 0, sizeof(*args));
 336         args->out.list_handle = handle;
 337         kvfree(info);
 338
 339         return 0;
 340
 341 error_free:
 342         kvfree(info);
 343         return r;
 344 }