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 <linux/sort.h> 32 #include <linux/uaccess.h> 33 34 #include "amdgpu.h" 35 #include "amdgpu_trace.h" 36 37 #define AMDGPU_BO_LIST_MAX_PRIORITY 32u 38 #define AMDGPU_BO_LIST_NUM_BUCKETS (AMDGPU_BO_LIST_MAX_PRIORITY + 1) 39 40 static void amdgpu_bo_list_free_rcu(struct rcu_head *rcu) 41 { 42 struct amdgpu_bo_list *list = container_of(rcu, struct amdgpu_bo_list, 43 rhead); 44 mutex_destroy(&list->bo_list_mutex); 45 kvfree(list); 46 } 47 48 static void amdgpu_bo_list_free(struct kref *ref) 49 { 50 struct amdgpu_bo_list *list = container_of(ref, struct amdgpu_bo_list, 51 refcount); 52 struct amdgpu_bo_list_entry *e; 53 54 amdgpu_bo_list_for_each_entry(e, list) 55 amdgpu_bo_unref(&e->bo); 56 call_rcu(&list->rhead, amdgpu_bo_list_free_rcu); 57 } 58 59 static int amdgpu_bo_list_entry_cmp(const void *_a, const void *_b) 60 { 61 const struct amdgpu_bo_list_entry *a = _a, *b = _b; 62 63 if (a->priority > b->priority) 64 return 1; 65 if (a->priority < b->priority) 66 return -1; 67 return 0; 68 } 69 70 int amdgpu_bo_list_create(struct amdgpu_device *adev, struct drm_file *filp, 71 struct drm_amdgpu_bo_list_entry *info, 72 size_t num_entries, struct amdgpu_bo_list **result) 73 { 74 unsigned last_entry = 0, first_userptr = num_entries; 75 struct amdgpu_bo_list_entry *array; 76 struct amdgpu_bo_list *list; 77 uint64_t total_size = 0; 78 size_t size; 79 unsigned i; 80 int r; 81 82 if (num_entries > (SIZE_MAX - sizeof(struct amdgpu_bo_list)) 83 / sizeof(struct amdgpu_bo_list_entry)) 84 return -EINVAL; 85 86 size = sizeof(struct amdgpu_bo_list); 87 size += num_entries * sizeof(struct amdgpu_bo_list_entry); 88 list = kvmalloc(size, GFP_KERNEL); 89 if (!list) 90 return -ENOMEM; 91 92 kref_init(&list->refcount); 93 list->gds_obj = NULL; 94 list->gws_obj = NULL; 95 list->oa_obj = NULL; 96 97 array = amdgpu_bo_list_array_entry(list, 0); 98 memset(array, 0, num_entries * sizeof(struct amdgpu_bo_list_entry)); 99 100 for (i = 0; i < num_entries; ++i) { 101 struct amdgpu_bo_list_entry *entry; 102 struct drm_gem_object *gobj; 103 struct amdgpu_bo *bo; 104 struct mm_struct *usermm; 105 106 gobj = drm_gem_object_lookup(filp, info[i].bo_handle); 107 if (!gobj) { 108 r = -ENOENT; 109 goto error_free; 110 } 111 112 bo = amdgpu_bo_ref(gem_to_amdgpu_bo(gobj)); 113 drm_gem_object_put(gobj); 114 115 usermm = amdgpu_ttm_tt_get_usermm(bo->tbo.ttm); 116 if (usermm) { 117 if (usermm != current->mm) { 118 amdgpu_bo_unref(&bo); 119 r = -EPERM; 120 goto error_free; 121 } 122 entry = &array[--first_userptr]; 123 } else { 124 entry = &array[last_entry++]; 125 } 126 127 entry->priority = min(info[i].bo_priority, 128 AMDGPU_BO_LIST_MAX_PRIORITY); 129 entry->bo = bo; 130 131 if (bo->preferred_domains == AMDGPU_GEM_DOMAIN_GDS) 132 list->gds_obj = bo; 133 if (bo->preferred_domains == AMDGPU_GEM_DOMAIN_GWS) 134 list->gws_obj = bo; 135 if (bo->preferred_domains == AMDGPU_GEM_DOMAIN_OA) 136 list->oa_obj = bo; 137 138 total_size += amdgpu_bo_size(bo); 139 trace_amdgpu_bo_list_set(list, bo); 140 } 141 142 list->first_userptr = first_userptr; 143 list->num_entries = num_entries; 144 sort(array, last_entry, sizeof(struct amdgpu_bo_list_entry), 145 amdgpu_bo_list_entry_cmp, NULL); 146 147 trace_amdgpu_cs_bo_status(list->num_entries, total_size); 148 149 mutex_init(&list->bo_list_mutex); 150 *result = list; 151 return 0; 152 153 error_free: 154 for (i = 0; i < last_entry; ++i) 155 amdgpu_bo_unref(&array[i].bo); 156 for (i = first_userptr; i < num_entries; ++i) 157 amdgpu_bo_unref(&array[i].bo); 158 kvfree(list); 159 return r; 160 161 } 162 163 static void amdgpu_bo_list_destroy(struct amdgpu_fpriv *fpriv, int id) 164 { 165 struct amdgpu_bo_list *list; 166 167 mutex_lock(&fpriv->bo_list_lock); 168 list = idr_remove(&fpriv->bo_list_handles, id); 169 mutex_unlock(&fpriv->bo_list_lock); 170 if (list) 171 kref_put(&list->refcount, amdgpu_bo_list_free); 172 } 173 174 int amdgpu_bo_list_get(struct amdgpu_fpriv *fpriv, int id, 175 struct amdgpu_bo_list **result) 176 { 177 rcu_read_lock(); 178 *result = idr_find(&fpriv->bo_list_handles, id); 179 180 if (*result && kref_get_unless_zero(&(*result)->refcount)) { 181 rcu_read_unlock(); 182 return 0; 183 } 184 185 rcu_read_unlock(); 186 *result = NULL; 187 return -ENOENT; 188 } 189 190 void amdgpu_bo_list_put(struct amdgpu_bo_list *list) 191 { 192 kref_put(&list->refcount, amdgpu_bo_list_free); 193 } 194 195 int amdgpu_bo_create_list_entry_array(struct drm_amdgpu_bo_list_in *in, 196 struct drm_amdgpu_bo_list_entry **info_param) 197 { 198 const void __user *uptr = u64_to_user_ptr(in->bo_info_ptr); 199 const uint32_t info_size = sizeof(struct drm_amdgpu_bo_list_entry); 200 struct drm_amdgpu_bo_list_entry *info; 201 int r; 202 203 info = kvmalloc_array(in->bo_number, info_size, GFP_KERNEL); 204 if (!info) 205 return -ENOMEM; 206 207 /* copy the handle array from userspace to a kernel buffer */ 208 r = -EFAULT; 209 if (likely(info_size == in->bo_info_size)) { 210 unsigned long bytes = in->bo_number * 211 in->bo_info_size; 212 213 if (copy_from_user(info, uptr, bytes)) 214 goto error_free; 215 216 } else { 217 unsigned long bytes = min(in->bo_info_size, info_size); 218 unsigned i; 219 220 memset(info, 0, in->bo_number * info_size); 221 for (i = 0; i < in->bo_number; ++i) { 222 if (copy_from_user(&info[i], uptr, bytes)) 223 goto error_free; 224 225 uptr += in->bo_info_size; 226 } 227 } 228 229 *info_param = info; 230 return 0; 231 232 error_free: 233 kvfree(info); 234 return r; 235 } 236 237 int amdgpu_bo_list_ioctl(struct drm_device *dev, void *data, 238 struct drm_file *filp) 239 { 240 struct amdgpu_device *adev = drm_to_adev(dev); 241 struct amdgpu_fpriv *fpriv = filp->driver_priv; 242 union drm_amdgpu_bo_list *args = data; 243 uint32_t handle = args->in.list_handle; 244 struct drm_amdgpu_bo_list_entry *info = NULL; 245 struct amdgpu_bo_list *list, *old; 246 int r; 247 248 r = amdgpu_bo_create_list_entry_array(&args->in, &info); 249 if (r) 250 return r; 251 252 switch (args->in.operation) { 253 case AMDGPU_BO_LIST_OP_CREATE: 254 r = amdgpu_bo_list_create(adev, filp, info, args->in.bo_number, 255 &list); 256 if (r) 257 goto error_free; 258 259 mutex_lock(&fpriv->bo_list_lock); 260 r = idr_alloc(&fpriv->bo_list_handles, list, 1, 0, GFP_KERNEL); 261 mutex_unlock(&fpriv->bo_list_lock); 262 if (r < 0) { 263 goto error_put_list; 264 } 265 266 handle = r; 267 break; 268 269 case AMDGPU_BO_LIST_OP_DESTROY: 270 amdgpu_bo_list_destroy(fpriv, handle); 271 handle = 0; 272 break; 273 274 case AMDGPU_BO_LIST_OP_UPDATE: 275 r = amdgpu_bo_list_create(adev, filp, info, args->in.bo_number, 276 &list); 277 if (r) 278 goto error_free; 279 280 mutex_lock(&fpriv->bo_list_lock); 281 old = idr_replace(&fpriv->bo_list_handles, list, handle); 282 mutex_unlock(&fpriv->bo_list_lock); 283 284 if (IS_ERR(old)) { 285 r = PTR_ERR(old); 286 goto error_put_list; 287 } 288 289 amdgpu_bo_list_put(old); 290 break; 291 292 default: 293 r = -EINVAL; 294 goto error_free; 295 } 296 297 memset(args, 0, sizeof(*args)); 298 args->out.list_handle = handle; 299 kvfree(info); 300 301 return 0; 302 303 error_put_list: 304 amdgpu_bo_list_put(list); 305 306 error_free: 307 kvfree(info); 308 return r; 309 } 310