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 <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 return -ENOENT; 187 } 188 189 void amdgpu_bo_list_put(struct amdgpu_bo_list *list) 190 { 191 kref_put(&list->refcount, amdgpu_bo_list_free); 192 } 193 194 int amdgpu_bo_create_list_entry_array(struct drm_amdgpu_bo_list_in *in, 195 struct drm_amdgpu_bo_list_entry **info_param) 196 { 197 const void __user *uptr = u64_to_user_ptr(in->bo_info_ptr); 198 const uint32_t info_size = sizeof(struct drm_amdgpu_bo_list_entry); 199 struct drm_amdgpu_bo_list_entry *info; 200 int r; 201 202 info = kvmalloc_array(in->bo_number, info_size, GFP_KERNEL); 203 if (!info) 204 return -ENOMEM; 205 206 /* copy the handle array from userspace to a kernel buffer */ 207 r = -EFAULT; 208 if (likely(info_size == in->bo_info_size)) { 209 unsigned long bytes = in->bo_number * 210 in->bo_info_size; 211 212 if (copy_from_user(info, uptr, bytes)) 213 goto error_free; 214 215 } else { 216 unsigned long bytes = min(in->bo_info_size, info_size); 217 unsigned i; 218 219 memset(info, 0, in->bo_number * info_size); 220 for (i = 0; i < in->bo_number; ++i) { 221 if (copy_from_user(&info[i], uptr, bytes)) 222 goto error_free; 223 224 uptr += in->bo_info_size; 225 } 226 } 227 228 *info_param = info; 229 return 0; 230 231 error_free: 232 kvfree(info); 233 return r; 234 } 235 236 int amdgpu_bo_list_ioctl(struct drm_device *dev, void *data, 237 struct drm_file *filp) 238 { 239 struct amdgpu_device *adev = drm_to_adev(dev); 240 struct amdgpu_fpriv *fpriv = filp->driver_priv; 241 union drm_amdgpu_bo_list *args = data; 242 uint32_t handle = args->in.list_handle; 243 struct drm_amdgpu_bo_list_entry *info = NULL; 244 struct amdgpu_bo_list *list, *old; 245 int r; 246 247 r = amdgpu_bo_create_list_entry_array(&args->in, &info); 248 if (r) 249 return r; 250 251 switch (args->in.operation) { 252 case AMDGPU_BO_LIST_OP_CREATE: 253 r = amdgpu_bo_list_create(adev, filp, info, args->in.bo_number, 254 &list); 255 if (r) 256 goto error_free; 257 258 mutex_lock(&fpriv->bo_list_lock); 259 r = idr_alloc(&fpriv->bo_list_handles, list, 1, 0, GFP_KERNEL); 260 mutex_unlock(&fpriv->bo_list_lock); 261 if (r < 0) { 262 goto error_put_list; 263 } 264 265 handle = r; 266 break; 267 268 case AMDGPU_BO_LIST_OP_DESTROY: 269 amdgpu_bo_list_destroy(fpriv, handle); 270 handle = 0; 271 break; 272 273 case AMDGPU_BO_LIST_OP_UPDATE: 274 r = amdgpu_bo_list_create(adev, filp, info, args->in.bo_number, 275 &list); 276 if (r) 277 goto error_free; 278 279 mutex_lock(&fpriv->bo_list_lock); 280 old = idr_replace(&fpriv->bo_list_handles, list, handle); 281 mutex_unlock(&fpriv->bo_list_lock); 282 283 if (IS_ERR(old)) { 284 r = PTR_ERR(old); 285 goto error_put_list; 286 } 287 288 amdgpu_bo_list_put(old); 289 break; 290 291 default: 292 r = -EINVAL; 293 goto error_free; 294 } 295 296 memset(args, 0, sizeof(*args)); 297 args->out.list_handle = handle; 298 kvfree(info); 299 300 return 0; 301 302 error_put_list: 303 amdgpu_bo_list_put(list); 304 305 error_free: 306 kvfree(info); 307 return r; 308 } 309