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
amdgpu_bo_list_free_rcu(struct rcu_head * rcu)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
amdgpu_bo_list_free(struct kref * ref)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
amdgpu_bo_list_entry_cmp(const void * _a,const void * _b)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
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)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
amdgpu_bo_list_destroy(struct amdgpu_fpriv * fpriv,int id)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
amdgpu_bo_list_get(struct amdgpu_fpriv * fpriv,int id,struct amdgpu_bo_list ** result)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
amdgpu_bo_list_put(struct amdgpu_bo_list * list)190 void amdgpu_bo_list_put(struct amdgpu_bo_list *list)
191 {
192 kref_put(&list->refcount, amdgpu_bo_list_free);
193 }
194
amdgpu_bo_create_list_entry_array(struct drm_amdgpu_bo_list_in * in,struct drm_amdgpu_bo_list_entry ** info_param)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
amdgpu_bo_list_ioctl(struct drm_device * dev,void * data,struct drm_file * filp)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