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