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 <[email protected]>
  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 void amdgpu_bo_list_free_rcu(struct rcu_head *rcu)
  39 {
  40         struct amdgpu_bo_list *list = container_of(rcu, struct amdgpu_bo_list,
  41                                                    rhead);
  42
  43         kvfree(list);
  44 }
  45
  46 static void amdgpu_bo_list_free(struct kref *ref)
  47 {
  48         struct amdgpu_bo_list *list = container_of(ref, struct amdgpu_bo_list,
  49                                                    refcount);
  50         struct amdgpu_bo_list_entry *e;
  51
  52         amdgpu_bo_list_for_each_entry(e, list)
  53                 amdgpu_bo_unref(&e->robj);
  54
  55         call_rcu(&list->rhead, amdgpu_bo_list_free_rcu);
  56 }
  57
  58 int amdgpu_bo_list_create(struct amdgpu_device *adev, struct drm_file *filp,
  59                           struct drm_amdgpu_bo_list_entry *info,
  60                           unsigned num_entries, struct amdgpu_bo_list **result)
  61 {
  62         unsigned last_entry = 0, first_userptr = num_entries;
  63         struct amdgpu_bo_list_entry *array;
  64         struct amdgpu_bo_list *list;
  65         uint64_t total_size = 0;
  66         size_t size;
  67         unsigned i;
  68         int r;
  69
  70         if (num_entries > SIZE_MAX / sizeof(struct amdgpu_bo_list_entry))
  71                 return -EINVAL;
  72
  73         size = sizeof(struct amdgpu_bo_list);
  74         size += num_entries * sizeof(struct amdgpu_bo_list_entry);
  75         list = kvmalloc(size, GFP_KERNEL);
  76         if (!list)
  77                 return -ENOMEM;
  78
  79         kref_init(&list->refcount);
  80         list->gds_obj = adev->gds.gds_gfx_bo;
  81         list->gws_obj = adev->gds.gws_gfx_bo;
  82         list->oa_obj = adev->gds.oa_gfx_bo;
  83
  84         array = amdgpu_bo_list_array_entry(list, 0);
  85         memset(array, 0, num_entries * sizeof(struct amdgpu_bo_list_entry));
  86
  87         for (i = 0; i < num_entries; ++i) {
  88                 struct amdgpu_bo_list_entry *entry;
  89                 struct drm_gem_object *gobj;
  90                 struct amdgpu_bo *bo;
  91                 struct mm_struct *usermm;
  92
  93                 gobj = drm_gem_object_lookup(filp, info[i].bo_handle);
  94                 if (!gobj) {
  95                         r = -ENOENT;
  96                         goto error_free;
  97                 }
  98
  99                 bo = amdgpu_bo_ref(gem_to_amdgpu_bo(gobj));
 100                 drm_gem_object_put_unlocked(gobj);
 101
 102                 usermm = amdgpu_ttm_tt_get_usermm(bo->tbo.ttm);
 103                 if (usermm) {
 104                         if (usermm != current->mm) {
 105                                 amdgpu_bo_unref(&bo);
 106                                 r = -EPERM;
 107                                 goto error_free;
 108                         }
 109                         entry = &array[--first_userptr];
 110                 } else {
 111                         entry = &array[last_entry++];
 112                 }
 113
 114                 entry->robj = bo;
 115                 entry->priority = min(info[i].bo_priority,
 116                                       AMDGPU_BO_LIST_MAX_PRIORITY);
 117                 entry->tv.bo = &entry->robj->tbo;
 118                 entry->tv.shared = !entry->robj->prime_shared_count;
 119
 120                 if (entry->robj->preferred_domains == AMDGPU_GEM_DOMAIN_GDS)
 121                         list->gds_obj = entry->robj;
 122                 if (entry->robj->preferred_domains == AMDGPU_GEM_DOMAIN_GWS)
 123                         list->gws_obj = entry->robj;
 124                 if (entry->robj->preferred_domains == AMDGPU_GEM_DOMAIN_OA)
 125                         list->oa_obj = entry->robj;
 126
 127                 total_size += amdgpu_bo_size(entry->robj);
 128                 trace_amdgpu_bo_list_set(list, entry->robj);
 129         }
 130
 131         list->first_userptr = first_userptr;
 132         list->num_entries = num_entries;
 133
 134         trace_amdgpu_cs_bo_status(list->num_entries, total_size);
 135
 136         *result = list;
 137         return 0;
 138
 139 error_free:
 140         while (i--)
 141                 amdgpu_bo_unref(&array[i].robj);
 142         kvfree(list);
 143         return r;
 144
 145 }
 146
 147 static void amdgpu_bo_list_destroy(struct amdgpu_fpriv *fpriv, int id)
 148 {
 149         struct amdgpu_bo_list *list;
 150
 151         mutex_lock(&fpriv->bo_list_lock);
 152         list = idr_remove(&fpriv->bo_list_handles, id);
 153         mutex_unlock(&fpriv->bo_list_lock);
 154         if (list)
 155                 kref_put(&list->refcount, amdgpu_bo_list_free);
 156 }
 157
 158 int amdgpu_bo_list_get(struct amdgpu_fpriv *fpriv, int id,
 159                        struct amdgpu_bo_list **result)
 160 {
 161         rcu_read_lock();
 162         *result = idr_find(&fpriv->bo_list_handles, id);
 163
 164         if (*result && kref_get_unless_zero(&(*result)->refcount)) {
 165                 rcu_read_unlock();
 166                 return 0;
 167         }
 168
 169         rcu_read_unlock();
 170         return -ENOENT;
 171 }
 172
 173 void amdgpu_bo_list_get_list(struct amdgpu_bo_list *list,
 174                              struct list_head *validated)
 175 {
 176         /* This is based on the bucket sort with O(n) time complexity.
 177          * An item with priority "i" is added to bucket[i]. The lists are then
 178          * concatenated in descending order.
 179          */
 180         struct list_head bucket[AMDGPU_BO_LIST_NUM_BUCKETS];
 181         struct amdgpu_bo_list_entry *e;
 182         unsigned i;
 183
 184         for (i = 0; i < AMDGPU_BO_LIST_NUM_BUCKETS; i++)
 185                 INIT_LIST_HEAD(&bucket[i]);
 186
 187         /* Since buffers which appear sooner in the relocation list are
 188          * likely to be used more often than buffers which appear later
 189          * in the list, the sort mustn't change the ordering of buffers
 190          * with the same priority, i.e. it must be stable.
 191          */
 192         amdgpu_bo_list_for_each_entry(e, list) {
 193                 unsigned priority = e->priority;
 194
 195                 if (!e->robj->parent)
 196                         list_add_tail(&e->tv.head, &bucket[priority]);
 197
 198                 e->user_pages = NULL;
 199         }
 200
 201         /* Connect the sorted buckets in the output list. */
 202         for (i = 0; i < AMDGPU_BO_LIST_NUM_BUCKETS; i++)
 203                 list_splice(&bucket[i], validated);
 204 }
 205
 206 void amdgpu_bo_list_put(struct amdgpu_bo_list *list)
 207 {
 208         kref_put(&list->refcount, amdgpu_bo_list_free);
 209 }
 210
 211 int amdgpu_bo_create_list_entry_array(struct drm_amdgpu_bo_list_in *in,
 212                                       struct drm_amdgpu_bo_list_entry **info_param)
 213 {
 214         const void __user *uptr = u64_to_user_ptr(in->bo_info_ptr);
 215         const uint32_t info_size = sizeof(struct drm_amdgpu_bo_list_entry);
 216         struct drm_amdgpu_bo_list_entry *info;
 217         int r;
 218
 219         info = kvmalloc_array(in->bo_number, info_size, GFP_KERNEL);
 220         if (!info)
 221                 return -ENOMEM;
 222
 223         /* copy the handle array from userspace to a kernel buffer */
 224         r = -EFAULT;
 225         if (likely(info_size == in->bo_info_size)) {
 226                 unsigned long bytes = in->bo_number *
 227                         in->bo_info_size;
 228
 229                 if (copy_from_user(info, uptr, bytes))
 230                         goto error_free;
 231
 232         } else {
 233                 unsigned long bytes = min(in->bo_info_size, info_size);
 234                 unsigned i;
 235
 236                 memset(info, 0, in->bo_number * info_size);
 237                 for (i = 0; i < in->bo_number; ++i) {
 238                         if (copy_from_user(&info[i], uptr, bytes))
 239                                 goto error_free;
 240
 241                         uptr += in->bo_info_size;
 242                 }
 243         }
 244
 245         *info_param = info;
 246         return 0;
 247
 248 error_free:
 249         kvfree(info);
 250         return r;
 251 }
 252
 253 int amdgpu_bo_list_ioctl(struct drm_device *dev, void *data,
 254                                 struct drm_file *filp)
 255 {
 256         struct amdgpu_device *adev = dev->dev_private;
 257         struct amdgpu_fpriv *fpriv = filp->driver_priv;
 258         union drm_amdgpu_bo_list *args = data;
 259         uint32_t handle = args->in.list_handle;
 260         struct drm_amdgpu_bo_list_entry *info = NULL;
 261         struct amdgpu_bo_list *list, *old;
 262         int r;
 263
 264         r = amdgpu_bo_create_list_entry_array(&args->in, &info);
 265         if (r)
 266                 goto error_free;
 267
 268         switch (args->in.operation) {
 269         case AMDGPU_BO_LIST_OP_CREATE:
 270                 r = amdgpu_bo_list_create(adev, filp, info, args->in.bo_number,
 271                                           &list);
 272                 if (r)
 273                         goto error_free;
 274
 275                 mutex_lock(&fpriv->bo_list_lock);
 276                 r = idr_alloc(&fpriv->bo_list_handles, list, 1, 0, GFP_KERNEL);
 277                 mutex_unlock(&fpriv->bo_list_lock);
 278                 if (r < 0) {
 279                         amdgpu_bo_list_put(list);
 280                         return r;
 281                 }
 282
 283                 handle = r;
 284                 break;
 285
 286         case AMDGPU_BO_LIST_OP_DESTROY:
 287                 amdgpu_bo_list_destroy(fpriv, handle);
 288                 handle = 0;
 289                 break;
 290
 291         case AMDGPU_BO_LIST_OP_UPDATE:
 292                 r = amdgpu_bo_list_create(adev, filp, info, args->in.bo_number,
 293                                           &list);
 294                 if (r)
 295                         goto error_free;
 296
 297                 mutex_lock(&fpriv->bo_list_lock);
 298                 old = idr_replace(&fpriv->bo_list_handles, list, handle);
 299                 mutex_unlock(&fpriv->bo_list_lock);
 300
 301                 if (IS_ERR(old)) {
 302                         amdgpu_bo_list_put(list);
 303                         r = PTR_ERR(old);
 304                         goto error_free;
 305                 }
 306
 307                 amdgpu_bo_list_put(old);
 308                 break;
 309
 310         default:
 311                 r = -EINVAL;
 312                 goto error_free;
 313         }
 314
 315         memset(args, 0, sizeof(*args));
 316         args->out.list_handle = handle;
 317         kvfree(info);
 318
 319         return 0;
 320
 321 error_free:
 322         if (info)
 323                 kvfree(info);
 324         return r;
 325 }