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/uaccess.h>
32
33 #include "amdgpu.h"
34 #include "amdgpu_trace.h"
35
36 #define AMDGPU_BO_LIST_MAX_PRIORITY 32u
37 #define AMDGPU_BO_LIST_NUM_BUCKETS (AMDGPU_BO_LIST_MAX_PRIORITY + 1)
38
amdgpu_bo_list_free_rcu(struct rcu_head * rcu)39 static void amdgpu_bo_list_free_rcu(struct rcu_head *rcu)
40 {
41 struct amdgpu_bo_list *list = container_of(rcu, struct amdgpu_bo_list,
42 rhead);
43
44 kvfree(list);
45 }
46
amdgpu_bo_list_free(struct kref * ref)47 static void amdgpu_bo_list_free(struct kref *ref)
48 {
49 struct amdgpu_bo_list *list = container_of(ref, struct amdgpu_bo_list,
50 refcount);
51 struct amdgpu_bo_list_entry *e;
52
53 amdgpu_bo_list_for_each_entry(e, list) {
54 struct amdgpu_bo *bo = ttm_to_amdgpu_bo(e->tv.bo);
55
56 amdgpu_bo_unref(&bo);
57 }
58
59 call_rcu(&list->rhead, amdgpu_bo_list_free_rcu);
60 }
61
amdgpu_bo_list_create(struct amdgpu_device * adev,struct drm_file * filp,struct drm_amdgpu_bo_list_entry * info,size_t num_entries,struct amdgpu_bo_list ** result)62 int amdgpu_bo_list_create(struct amdgpu_device *adev, struct drm_file *filp,
63 struct drm_amdgpu_bo_list_entry *info,
64 size_t num_entries, struct amdgpu_bo_list **result)
65 {
66 unsigned last_entry = 0, first_userptr = num_entries;
67 struct amdgpu_bo_list_entry *array;
68 struct amdgpu_bo_list *list;
69 uint64_t total_size = 0;
70 size_t size;
71 unsigned i;
72 int r;
73
74 if (num_entries > (SIZE_MAX - sizeof(struct amdgpu_bo_list))
75 / sizeof(struct amdgpu_bo_list_entry))
76 return -EINVAL;
77
78 size = sizeof(struct amdgpu_bo_list);
79 size += num_entries * sizeof(struct amdgpu_bo_list_entry);
80 list = kvmalloc(size, GFP_KERNEL);
81 if (!list)
82 return -ENOMEM;
83
84 kref_init(&list->refcount);
85 list->gds_obj = NULL;
86 list->gws_obj = NULL;
87 list->oa_obj = NULL;
88
89 array = amdgpu_bo_list_array_entry(list, 0);
90 memset(array, 0, num_entries * sizeof(struct amdgpu_bo_list_entry));
91
92 for (i = 0; i < num_entries; ++i) {
93 struct amdgpu_bo_list_entry *entry;
94 struct drm_gem_object *gobj;
95 struct amdgpu_bo *bo;
96 struct mm_struct *usermm;
97
98 gobj = drm_gem_object_lookup(filp, info[i].bo_handle);
99 if (!gobj) {
100 r = -ENOENT;
101 goto error_free;
102 }
103
104 bo = amdgpu_bo_ref(gem_to_amdgpu_bo(gobj));
105 drm_gem_object_put(gobj);
106
107 usermm = amdgpu_ttm_tt_get_usermm(bo->tbo.ttm);
108 if (usermm) {
109 if (usermm != current->mm) {
110 amdgpu_bo_unref(&bo);
111 r = -EPERM;
112 goto error_free;
113 }
114 entry = &array[--first_userptr];
115 } else {
116 entry = &array[last_entry++];
117 }
118
119 entry->priority = min(info[i].bo_priority,
120 AMDGPU_BO_LIST_MAX_PRIORITY);
121 entry->tv.bo = &bo->tbo;
122
123 if (bo->preferred_domains == AMDGPU_GEM_DOMAIN_GDS)
124 list->gds_obj = bo;
125 if (bo->preferred_domains == AMDGPU_GEM_DOMAIN_GWS)
126 list->gws_obj = bo;
127 if (bo->preferred_domains == AMDGPU_GEM_DOMAIN_OA)
128 list->oa_obj = bo;
129
130 total_size += amdgpu_bo_size(bo);
131 trace_amdgpu_bo_list_set(list, bo);
132 }
133
134 list->first_userptr = first_userptr;
135 list->num_entries = num_entries;
136
137 trace_amdgpu_cs_bo_status(list->num_entries, total_size);
138
139 *result = list;
140 return 0;
141
142 error_free:
143 for (i = 0; i < last_entry; ++i) {
144 struct amdgpu_bo *bo = ttm_to_amdgpu_bo(array[i].tv.bo);
145
146 amdgpu_bo_unref(&bo);
147 }
148 for (i = first_userptr; i < num_entries; ++i) {
149 struct amdgpu_bo *bo = ttm_to_amdgpu_bo(array[i].tv.bo);
150
151 amdgpu_bo_unref(&bo);
152 }
153 kvfree(list);
154 return r;
155
156 }
157
amdgpu_bo_list_destroy(struct amdgpu_fpriv * fpriv,int id)158 static void amdgpu_bo_list_destroy(struct amdgpu_fpriv *fpriv, int id)
159 {
160 struct amdgpu_bo_list *list;
161
162 mutex_lock(&fpriv->bo_list_lock);
163 list = idr_remove(&fpriv->bo_list_handles, id);
164 mutex_unlock(&fpriv->bo_list_lock);
165 if (list)
166 kref_put(&list->refcount, amdgpu_bo_list_free);
167 }
168
amdgpu_bo_list_get(struct amdgpu_fpriv * fpriv,int id,struct amdgpu_bo_list ** result)169 int amdgpu_bo_list_get(struct amdgpu_fpriv *fpriv, int id,
170 struct amdgpu_bo_list **result)
171 {
172 rcu_read_lock();
173 *result = idr_find(&fpriv->bo_list_handles, id);
174
175 if (*result && kref_get_unless_zero(&(*result)->refcount)) {
176 rcu_read_unlock();
177 return 0;
178 }
179
180 rcu_read_unlock();
181 return -ENOENT;
182 }
183
amdgpu_bo_list_get_list(struct amdgpu_bo_list * list,struct list_head * validated)184 void amdgpu_bo_list_get_list(struct amdgpu_bo_list *list,
185 struct list_head *validated)
186 {
187 /* This is based on the bucket sort with O(n) time complexity.
188 * An item with priority "i" is added to bucket[i]. The lists are then
189 * concatenated in descending order.
190 */
191 struct list_head bucket[AMDGPU_BO_LIST_NUM_BUCKETS];
192 struct amdgpu_bo_list_entry *e;
193 unsigned i;
194
195 for (i = 0; i < AMDGPU_BO_LIST_NUM_BUCKETS; i++)
196 INIT_LIST_HEAD(&bucket[i]);
197
198 /* Since buffers which appear sooner in the relocation list are
199 * likely to be used more often than buffers which appear later
200 * in the list, the sort mustn't change the ordering of buffers
201 * with the same priority, i.e. it must be stable.
202 */
203 amdgpu_bo_list_for_each_entry(e, list) {
204 struct amdgpu_bo *bo = ttm_to_amdgpu_bo(e->tv.bo);
205 unsigned priority = e->priority;
206
207 if (!bo->parent)
208 list_add_tail(&e->tv.head, &bucket[priority]);
209
210 e->user_pages = NULL;
211 }
212
213 /* Connect the sorted buckets in the output list. */
214 for (i = 0; i < AMDGPU_BO_LIST_NUM_BUCKETS; i++)
215 list_splice(&bucket[i], validated);
216 }
217
amdgpu_bo_list_put(struct amdgpu_bo_list * list)218 void amdgpu_bo_list_put(struct amdgpu_bo_list *list)
219 {
220 kref_put(&list->refcount, amdgpu_bo_list_free);
221 }
222
amdgpu_bo_create_list_entry_array(struct drm_amdgpu_bo_list_in * in,struct drm_amdgpu_bo_list_entry ** info_param)223 int amdgpu_bo_create_list_entry_array(struct drm_amdgpu_bo_list_in *in,
224 struct drm_amdgpu_bo_list_entry **info_param)
225 {
226 const void __user *uptr = u64_to_user_ptr(in->bo_info_ptr);
227 const uint32_t info_size = sizeof(struct drm_amdgpu_bo_list_entry);
228 struct drm_amdgpu_bo_list_entry *info;
229 int r;
230
231 info = kvmalloc_array(in->bo_number, info_size, GFP_KERNEL);
232 if (!info)
233 return -ENOMEM;
234
235 /* copy the handle array from userspace to a kernel buffer */
236 r = -EFAULT;
237 if (likely(info_size == in->bo_info_size)) {
238 unsigned long bytes = in->bo_number *
239 in->bo_info_size;
240
241 if (copy_from_user(info, uptr, bytes))
242 goto error_free;
243
244 } else {
245 unsigned long bytes = min(in->bo_info_size, info_size);
246 unsigned i;
247
248 memset(info, 0, in->bo_number * info_size);
249 for (i = 0; i < in->bo_number; ++i) {
250 if (copy_from_user(&info[i], uptr, bytes))
251 goto error_free;
252
253 uptr += in->bo_info_size;
254 }
255 }
256
257 *info_param = info;
258 return 0;
259
260 error_free:
261 kvfree(info);
262 return r;
263 }
264
amdgpu_bo_list_ioctl(struct drm_device * dev,void * data,struct drm_file * filp)265 int amdgpu_bo_list_ioctl(struct drm_device *dev, void *data,
266 struct drm_file *filp)
267 {
268 struct amdgpu_device *adev = drm_to_adev(dev);
269 struct amdgpu_fpriv *fpriv = filp->driver_priv;
270 union drm_amdgpu_bo_list *args = data;
271 uint32_t handle = args->in.list_handle;
272 struct drm_amdgpu_bo_list_entry *info = NULL;
273 struct amdgpu_bo_list *list, *old;
274 int r;
275
276 r = amdgpu_bo_create_list_entry_array(&args->in, &info);
277 if (r)
278 return r;
279
280 switch (args->in.operation) {
281 case AMDGPU_BO_LIST_OP_CREATE:
282 r = amdgpu_bo_list_create(adev, filp, info, args->in.bo_number,
283 &list);
284 if (r)
285 goto error_free;
286
287 mutex_lock(&fpriv->bo_list_lock);
288 r = idr_alloc(&fpriv->bo_list_handles, list, 1, 0, GFP_KERNEL);
289 mutex_unlock(&fpriv->bo_list_lock);
290 if (r < 0) {
291 goto error_put_list;
292 }
293
294 handle = r;
295 break;
296
297 case AMDGPU_BO_LIST_OP_DESTROY:
298 amdgpu_bo_list_destroy(fpriv, handle);
299 handle = 0;
300 break;
301
302 case AMDGPU_BO_LIST_OP_UPDATE:
303 r = amdgpu_bo_list_create(adev, filp, info, args->in.bo_number,
304 &list);
305 if (r)
306 goto error_free;
307
308 mutex_lock(&fpriv->bo_list_lock);
309 old = idr_replace(&fpriv->bo_list_handles, list, handle);
310 mutex_unlock(&fpriv->bo_list_lock);
311
312 if (IS_ERR(old)) {
313 r = PTR_ERR(old);
314 goto error_put_list;
315 }
316
317 amdgpu_bo_list_put(old);
318 break;
319
320 default:
321 r = -EINVAL;
322 goto error_free;
323 }
324
325 memset(args, 0, sizeof(*args));
326 args->out.list_handle = handle;
327 kvfree(info);
328
329 return 0;
330
331 error_put_list:
332 amdgpu_bo_list_put(list);
333
334 error_free:
335 kvfree(info);
336 return r;
337 }
338