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
40static 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(lock: &list->bo_list_mutex);
45 kvfree(addr: list);
46}
47
48static 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(bo: &e->bo);
56 call_rcu(head: &list->rhead, func: amdgpu_bo_list_free_rcu);
57}
58
59static 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
70int 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 unsigned i;
79 int r;
80
81 list = kvzalloc(struct_size(list, entries, num_entries), GFP_KERNEL);
82 if (!list)
83 return -ENOMEM;
84
85 kref_init(kref: &list->refcount);
86
87 list->num_entries = num_entries;
88 array = list->entries;
89
90 for (i = 0; i < num_entries; ++i) {
91 struct amdgpu_bo_list_entry *entry;
92 struct drm_gem_object *gobj;
93 struct amdgpu_bo *bo;
94 struct mm_struct *usermm;
95
96 gobj = drm_gem_object_lookup(filp, handle: info[i].bo_handle);
97 if (!gobj) {
98 r = -ENOENT;
99 goto error_free;
100 }
101
102 bo = amdgpu_bo_ref(gem_to_amdgpu_bo(gobj));
103 drm_gem_object_put(obj: gobj);
104
105 usermm = amdgpu_ttm_tt_get_usermm(ttm: bo->tbo.ttm);
106 if (usermm) {
107 if (usermm != current->mm) {
108 amdgpu_bo_unref(bo: &bo);
109 r = -EPERM;
110 goto error_free;
111 }
112 entry = &array[--first_userptr];
113 } else {
114 entry = &array[last_entry++];
115 }
116
117 entry->priority = min(info[i].bo_priority,
118 AMDGPU_BO_LIST_MAX_PRIORITY);
119 entry->bo = bo;
120
121 if (bo->preferred_domains == AMDGPU_GEM_DOMAIN_GDS)
122 list->gds_obj = bo;
123 if (bo->preferred_domains == AMDGPU_GEM_DOMAIN_GWS)
124 list->gws_obj = bo;
125 if (bo->preferred_domains == AMDGPU_GEM_DOMAIN_OA)
126 list->oa_obj = bo;
127
128 total_size += amdgpu_bo_size(bo);
129 trace_amdgpu_bo_list_set(list, bo);
130 }
131
132 list->first_userptr = first_userptr;
133 sort(base: array, num: last_entry, size: sizeof(struct amdgpu_bo_list_entry),
134 cmp_func: amdgpu_bo_list_entry_cmp, NULL);
135
136 trace_amdgpu_cs_bo_status(total_bo: list->num_entries, total_size);
137
138 mutex_init(&list->bo_list_mutex);
139 *result = list;
140 return 0;
141
142error_free:
143 for (i = 0; i < last_entry; ++i)
144 amdgpu_bo_unref(bo: &array[i].bo);
145 for (i = first_userptr; i < num_entries; ++i)
146 amdgpu_bo_unref(bo: &array[i].bo);
147 kvfree(addr: 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(lock: &fpriv->bo_list_lock);
159 if (list)
160 kref_put(kref: &list->refcount, release: 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(kref: &(*result)->refcount)) {
170 rcu_read_unlock();
171 return 0;
172 }
173
174 rcu_read_unlock();
175 *result = NULL;
176 return -ENOENT;
177}
178
179void amdgpu_bo_list_put(struct amdgpu_bo_list *list)
180{
181 kref_put(kref: &list->refcount, release: amdgpu_bo_list_free);
182}
183
184int amdgpu_bo_create_list_entry_array(struct drm_amdgpu_bo_list_in *in,
185 struct drm_amdgpu_bo_list_entry **info_param)
186{
187 const uint32_t info_size = sizeof(struct drm_amdgpu_bo_list_entry);
188 const void __user *uptr = u64_to_user_ptr(in->bo_info_ptr);
189 const uint32_t bo_info_size = in->bo_info_size;
190 const uint32_t bo_number = in->bo_number;
191 struct drm_amdgpu_bo_list_entry *info;
192
193 /* copy the handle array from userspace to a kernel buffer */
194 if (likely(info_size == bo_info_size)) {
195 info = vmemdup_array_user(src: uptr, n: bo_number, size: info_size);
196 if (IS_ERR(ptr: info))
197 return PTR_ERR(ptr: info);
198 } else {
199 const uint32_t bytes = min(bo_info_size, info_size);
200 unsigned i;
201
202 info = kvmalloc_array(bo_number, info_size, GFP_KERNEL);
203 if (!info)
204 return -ENOMEM;
205
206 memset(info, 0, bo_number * info_size);
207 for (i = 0; i < bo_number; ++i, uptr += bo_info_size) {
208 if (copy_from_user(to: &info[i], from: uptr, n: bytes)) {
209 kvfree(addr: info);
210 return -EFAULT;
211 }
212 }
213 }
214
215 *info_param = info;
216 return 0;
217}
218
219int amdgpu_bo_list_ioctl(struct drm_device *dev, void *data,
220 struct drm_file *filp)
221{
222 struct amdgpu_device *adev = drm_to_adev(ddev: dev);
223 struct amdgpu_fpriv *fpriv = filp->driver_priv;
224 union drm_amdgpu_bo_list *args = data;
225 uint32_t handle = args->in.list_handle;
226 struct drm_amdgpu_bo_list_entry *info = NULL;
227 struct amdgpu_bo_list *list, *old;
228 int r;
229
230 r = amdgpu_bo_create_list_entry_array(in: &args->in, info_param: &info);
231 if (r)
232 return r;
233
234 switch (args->in.operation) {
235 case AMDGPU_BO_LIST_OP_CREATE:
236 r = amdgpu_bo_list_create(adev, filp, info, num_entries: args->in.bo_number,
237 result: &list);
238 if (r)
239 goto error_free;
240
241 mutex_lock(&fpriv->bo_list_lock);
242 r = idr_alloc(&fpriv->bo_list_handles, ptr: list, start: 1, end: 0, GFP_KERNEL);
243 mutex_unlock(lock: &fpriv->bo_list_lock);
244 if (r < 0) {
245 goto error_put_list;
246 }
247
248 handle = r;
249 break;
250
251 case AMDGPU_BO_LIST_OP_DESTROY:
252 amdgpu_bo_list_destroy(fpriv, id: handle);
253 handle = 0;
254 break;
255
256 case AMDGPU_BO_LIST_OP_UPDATE:
257 r = amdgpu_bo_list_create(adev, filp, info, num_entries: args->in.bo_number,
258 result: &list);
259 if (r)
260 goto error_free;
261
262 mutex_lock(&fpriv->bo_list_lock);
263 old = idr_replace(&fpriv->bo_list_handles, list, id: handle);
264 mutex_unlock(lock: &fpriv->bo_list_lock);
265
266 if (IS_ERR(ptr: old)) {
267 r = PTR_ERR(ptr: old);
268 goto error_put_list;
269 }
270
271 amdgpu_bo_list_put(list: old);
272 break;
273
274 default:
275 r = -EINVAL;
276 goto error_free;
277 }
278
279 memset(args, 0, sizeof(*args));
280 args->out.list_handle = handle;
281 kvfree(addr: info);
282
283 return 0;
284
285error_put_list:
286 amdgpu_bo_list_put(list);
287
288error_free:
289 kvfree(addr: info);
290 return r;
291}
292

source code of linux/drivers/gpu/drm/amd/amdgpu/amdgpu_bo_list.c