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1/*
2 * Copyright 2014 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 <christian.koenig@amd.com>
29 */
30
31#include "amdgpu.h"
32#include "amdgpu_trace.h"
33#include "amdgpu_amdkfd.h"
34
35struct amdgpu_sync_entry {
36 struct hlist_node node;
37 struct dma_fence *fence;
38};
39
40static struct kmem_cache *amdgpu_sync_slab;
41
42/**
43 * amdgpu_sync_create - zero init sync object
44 *
45 * @sync: sync object to initialize
46 *
47 * Just clear the sync object for now.
48 */
49void amdgpu_sync_create(struct amdgpu_sync *sync)
50{
51 hash_init(sync->fences);
52 sync->last_vm_update = NULL;
53}
54
55/**
56 * amdgpu_sync_same_dev - test if fence belong to us
57 *
58 * @adev: amdgpu device to use for the test
59 * @f: fence to test
60 *
61 * Test if the fence was issued by us.
62 */
63static bool amdgpu_sync_same_dev(struct amdgpu_device *adev,
64 struct dma_fence *f)
65{
66 struct drm_sched_fence *s_fence = to_drm_sched_fence(f);
67
68 if (s_fence) {
69 struct amdgpu_ring *ring;
70
71 ring = container_of(s_fence->sched, struct amdgpu_ring, sched);
72 return ring->adev == adev;
73 }
74
75 return false;
76}
77
78/**
79 * amdgpu_sync_get_owner - extract the owner of a fence
80 *
81 * @f: fence get the owner from
82 *
83 * Extract who originally created the fence.
84 */
85static void *amdgpu_sync_get_owner(struct dma_fence *f)
86{
87 struct drm_sched_fence *s_fence;
88 struct amdgpu_amdkfd_fence *kfd_fence;
89
90 if (!f)
91 return AMDGPU_FENCE_OWNER_UNDEFINED;
92
93 s_fence = to_drm_sched_fence(f);
94 if (s_fence)
95 return s_fence->owner;
96
97 kfd_fence = to_amdgpu_amdkfd_fence(f);
98 if (kfd_fence)
99 return AMDGPU_FENCE_OWNER_KFD;
100
101 return AMDGPU_FENCE_OWNER_UNDEFINED;
102}
103
104/**
105 * amdgpu_sync_keep_later - Keep the later fence
106 *
107 * @keep: existing fence to test
108 * @fence: new fence
109 *
110 * Either keep the existing fence or the new one, depending which one is later.
111 */
112static void amdgpu_sync_keep_later(struct dma_fence **keep,
113 struct dma_fence *fence)
114{
115 if (*keep && dma_fence_is_later(*keep, fence))
116 return;
117
118 dma_fence_put(*keep);
119 *keep = dma_fence_get(fence);
120}
121
122/**
123 * amdgpu_sync_add_later - add the fence to the hash
124 *
125 * @sync: sync object to add the fence to
126 * @f: fence to add
127 *
128 * Tries to add the fence to an existing hash entry. Returns true when an entry
129 * was found, false otherwise.
130 */
131static bool amdgpu_sync_add_later(struct amdgpu_sync *sync, struct dma_fence *f)
132{
133 struct amdgpu_sync_entry *e;
134
135 hash_for_each_possible(sync->fences, e, node, f->context) {
136 if (unlikely(e->fence->context != f->context))
137 continue;
138
139 amdgpu_sync_keep_later(&e->fence, f);
140 return true;
141 }
142 return false;
143}
144
145/**
146 * amdgpu_sync_fence - remember to sync to this fence
147 *
148 * @sync: sync object to add fence to
149 * @f: fence to sync to
150 *
151 * Add the fence to the sync object.
152 */
153int amdgpu_sync_fence(struct amdgpu_sync *sync, struct dma_fence *f)
154{
155 struct amdgpu_sync_entry *e;
156
157 if (!f)
158 return 0;
159
160 if (amdgpu_sync_add_later(sync, f))
161 return 0;
162
163 e = kmem_cache_alloc(amdgpu_sync_slab, GFP_KERNEL);
164 if (!e)
165 return -ENOMEM;
166
167 hash_add(sync->fences, &e->node, f->context);
168 e->fence = dma_fence_get(f);
169 return 0;
170}
171
172/**
173 * amdgpu_sync_vm_fence - remember to sync to this VM fence
174 *
175 * @sync: sync object to add fence to
176 * @fence: the VM fence to add
177 *
178 * Add the fence to the sync object and remember it as VM update.
179 */
180int amdgpu_sync_vm_fence(struct amdgpu_sync *sync, struct dma_fence *fence)
181{
182 if (!fence)
183 return 0;
184
185 amdgpu_sync_keep_later(&sync->last_vm_update, fence);
186 return amdgpu_sync_fence(sync, fence);
187}
188
189/**
190 * amdgpu_sync_resv - sync to a reservation object
191 *
192 * @adev: amdgpu device
193 * @sync: sync object to add fences from reservation object to
194 * @resv: reservation object with embedded fence
195 * @mode: how owner affects which fences we sync to
196 * @owner: owner of the planned job submission
197 *
198 * Sync to the fence
199 */
200int amdgpu_sync_resv(struct amdgpu_device *adev, struct amdgpu_sync *sync,
201 struct dma_resv *resv, enum amdgpu_sync_mode mode,
202 void *owner)
203{
204 struct dma_resv_list *flist;
205 struct dma_fence *f;
206 unsigned i;
207 int r = 0;
208
209 if (resv == NULL)
210 return -EINVAL;
211
212 /* always sync to the exclusive fence */
213 f = dma_resv_excl_fence(resv);
214 r = amdgpu_sync_fence(sync, f);
215
216 flist = dma_resv_shared_list(resv);
217 if (!flist || r)
218 return r;
219
220 for (i = 0; i < flist->shared_count; ++i) {
221 void *fence_owner;
222
223 f = rcu_dereference_protected(flist->shared[i],
224 dma_resv_held(resv));
225
226 fence_owner = amdgpu_sync_get_owner(f);
227
228 /* Always sync to moves, no matter what */
229 if (fence_owner == AMDGPU_FENCE_OWNER_UNDEFINED) {
230 r = amdgpu_sync_fence(sync, f);
231 if (r)
232 break;
233 }
234
235 /* We only want to trigger KFD eviction fences on
236 * evict or move jobs. Skip KFD fences otherwise.
237 */
238 if (fence_owner == AMDGPU_FENCE_OWNER_KFD &&
239 owner != AMDGPU_FENCE_OWNER_UNDEFINED)
240 continue;
241
242 /* Never sync to VM updates either. */
243 if (fence_owner == AMDGPU_FENCE_OWNER_VM &&
244 owner != AMDGPU_FENCE_OWNER_UNDEFINED)
245 continue;
246
247 /* Ignore fences depending on the sync mode */
248 switch (mode) {
249 case AMDGPU_SYNC_ALWAYS:
250 break;
251
252 case AMDGPU_SYNC_NE_OWNER:
253 if (amdgpu_sync_same_dev(adev, f) &&
254 fence_owner == owner)
255 continue;
256 break;
257
258 case AMDGPU_SYNC_EQ_OWNER:
259 if (amdgpu_sync_same_dev(adev, f) &&
260 fence_owner != owner)
261 continue;
262 break;
263
264 case AMDGPU_SYNC_EXPLICIT:
265 continue;
266 }
267
268 WARN(debug_evictions && fence_owner == AMDGPU_FENCE_OWNER_KFD,
269 "Adding eviction fence to sync obj");
270 r = amdgpu_sync_fence(sync, f);
271 if (r)
272 break;
273 }
274 return r;
275}
276
277/**
278 * amdgpu_sync_peek_fence - get the next fence not signaled yet
279 *
280 * @sync: the sync object
281 * @ring: optional ring to use for test
282 *
283 * Returns the next fence not signaled yet without removing it from the sync
284 * object.
285 */
286struct dma_fence *amdgpu_sync_peek_fence(struct amdgpu_sync *sync,
287 struct amdgpu_ring *ring)
288{
289 struct amdgpu_sync_entry *e;
290 struct hlist_node *tmp;
291 int i;
292
293 hash_for_each_safe(sync->fences, i, tmp, e, node) {
294 struct dma_fence *f = e->fence;
295 struct drm_sched_fence *s_fence = to_drm_sched_fence(f);
296
297 if (dma_fence_is_signaled(f)) {
298 hash_del(&e->node);
299 dma_fence_put(f);
300 kmem_cache_free(amdgpu_sync_slab, e);
301 continue;
302 }
303 if (ring && s_fence) {
304 /* For fences from the same ring it is sufficient
305 * when they are scheduled.
306 */
307 if (s_fence->sched == &ring->sched) {
308 if (dma_fence_is_signaled(&s_fence->scheduled))
309 continue;
310
311 return &s_fence->scheduled;
312 }
313 }
314
315 return f;
316 }
317
318 return NULL;
319}
320
321/**
322 * amdgpu_sync_get_fence - get the next fence from the sync object
323 *
324 * @sync: sync object to use
325 *
326 * Get and removes the next fence from the sync object not signaled yet.
327 */
328struct dma_fence *amdgpu_sync_get_fence(struct amdgpu_sync *sync)
329{
330 struct amdgpu_sync_entry *e;
331 struct hlist_node *tmp;
332 struct dma_fence *f;
333 int i;
334 hash_for_each_safe(sync->fences, i, tmp, e, node) {
335
336 f = e->fence;
337
338 hash_del(&e->node);
339 kmem_cache_free(amdgpu_sync_slab, e);
340
341 if (!dma_fence_is_signaled(f))
342 return f;
343
344 dma_fence_put(f);
345 }
346 return NULL;
347}
348
349/**
350 * amdgpu_sync_clone - clone a sync object
351 *
352 * @source: sync object to clone
353 * @clone: pointer to destination sync object
354 *
355 * Adds references to all unsignaled fences in @source to @clone. Also
356 * removes signaled fences from @source while at it.
357 */
358int amdgpu_sync_clone(struct amdgpu_sync *source, struct amdgpu_sync *clone)
359{
360 struct amdgpu_sync_entry *e;
361 struct hlist_node *tmp;
362 struct dma_fence *f;
363 int i, r;
364
365 hash_for_each_safe(source->fences, i, tmp, e, node) {
366 f = e->fence;
367 if (!dma_fence_is_signaled(f)) {
368 r = amdgpu_sync_fence(clone, f);
369 if (r)
370 return r;
371 } else {
372 hash_del(&e->node);
373 dma_fence_put(f);
374 kmem_cache_free(amdgpu_sync_slab, e);
375 }
376 }
377
378 dma_fence_put(clone->last_vm_update);
379 clone->last_vm_update = dma_fence_get(source->last_vm_update);
380
381 return 0;
382}
383
384int amdgpu_sync_wait(struct amdgpu_sync *sync, bool intr)
385{
386 struct amdgpu_sync_entry *e;
387 struct hlist_node *tmp;
388 int i, r;
389
390 hash_for_each_safe(sync->fences, i, tmp, e, node) {
391 r = dma_fence_wait(e->fence, intr);
392 if (r)
393 return r;
394
395 hash_del(&e->node);
396 dma_fence_put(e->fence);
397 kmem_cache_free(amdgpu_sync_slab, e);
398 }
399
400 return 0;
401}
402
403/**
404 * amdgpu_sync_free - free the sync object
405 *
406 * @sync: sync object to use
407 *
408 * Free the sync object.
409 */
410void amdgpu_sync_free(struct amdgpu_sync *sync)
411{
412 struct amdgpu_sync_entry *e;
413 struct hlist_node *tmp;
414 unsigned i;
415
416 hash_for_each_safe(sync->fences, i, tmp, e, node) {
417 hash_del(&e->node);
418 dma_fence_put(e->fence);
419 kmem_cache_free(amdgpu_sync_slab, e);
420 }
421
422 dma_fence_put(sync->last_vm_update);
423}
424
425/**
426 * amdgpu_sync_init - init sync object subsystem
427 *
428 * Allocate the slab allocator.
429 */
430int amdgpu_sync_init(void)
431{
432 amdgpu_sync_slab = kmem_cache_create(
433 "amdgpu_sync", sizeof(struct amdgpu_sync_entry), 0,
434 SLAB_HWCACHE_ALIGN, NULL);
435 if (!amdgpu_sync_slab)
436 return -ENOMEM;
437
438 return 0;
439}
440
441/**
442 * amdgpu_sync_fini - fini sync object subsystem
443 *
444 * Free the slab allocator.
445 */
446void amdgpu_sync_fini(void)
447{
448 kmem_cache_destroy(amdgpu_sync_slab);
449}
1/*
2 * Copyright 2014 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 <christian.koenig@amd.com>
29 */
30
31#include <drm/drmP.h>
32#include "amdgpu.h"
33#include "amdgpu_trace.h"
34
35struct amdgpu_sync_entry {
36 struct hlist_node node;
37 struct dma_fence *fence;
38};
39
40static struct kmem_cache *amdgpu_sync_slab;
41
42/**
43 * amdgpu_sync_create - zero init sync object
44 *
45 * @sync: sync object to initialize
46 *
47 * Just clear the sync object for now.
48 */
49void amdgpu_sync_create(struct amdgpu_sync *sync)
50{
51 hash_init(sync->fences);
52 sync->last_vm_update = NULL;
53}
54
55/**
56 * amdgpu_sync_same_dev - test if fence belong to us
57 *
58 * @adev: amdgpu device to use for the test
59 * @f: fence to test
60 *
61 * Test if the fence was issued by us.
62 */
63static bool amdgpu_sync_same_dev(struct amdgpu_device *adev,
64 struct dma_fence *f)
65{
66 struct amd_sched_fence *s_fence = to_amd_sched_fence(f);
67
68 if (s_fence) {
69 struct amdgpu_ring *ring;
70
71 ring = container_of(s_fence->sched, struct amdgpu_ring, sched);
72 return ring->adev == adev;
73 }
74
75 return false;
76}
77
78/**
79 * amdgpu_sync_get_owner - extract the owner of a fence
80 *
81 * @fence: fence get the owner from
82 *
83 * Extract who originally created the fence.
84 */
85static void *amdgpu_sync_get_owner(struct dma_fence *f)
86{
87 struct amd_sched_fence *s_fence = to_amd_sched_fence(f);
88
89 if (s_fence)
90 return s_fence->owner;
91
92 return AMDGPU_FENCE_OWNER_UNDEFINED;
93}
94
95/**
96 * amdgpu_sync_keep_later - Keep the later fence
97 *
98 * @keep: existing fence to test
99 * @fence: new fence
100 *
101 * Either keep the existing fence or the new one, depending which one is later.
102 */
103static void amdgpu_sync_keep_later(struct dma_fence **keep,
104 struct dma_fence *fence)
105{
106 if (*keep && dma_fence_is_later(*keep, fence))
107 return;
108
109 dma_fence_put(*keep);
110 *keep = dma_fence_get(fence);
111}
112
113/**
114 * amdgpu_sync_add_later - add the fence to the hash
115 *
116 * @sync: sync object to add the fence to
117 * @f: fence to add
118 *
119 * Tries to add the fence to an existing hash entry. Returns true when an entry
120 * was found, false otherwise.
121 */
122static bool amdgpu_sync_add_later(struct amdgpu_sync *sync, struct dma_fence *f)
123{
124 struct amdgpu_sync_entry *e;
125
126 hash_for_each_possible(sync->fences, e, node, f->context) {
127 if (unlikely(e->fence->context != f->context))
128 continue;
129
130 amdgpu_sync_keep_later(&e->fence, f);
131 return true;
132 }
133 return false;
134}
135
136/**
137 * amdgpu_sync_fence - remember to sync to this fence
138 *
139 * @sync: sync object to add fence to
140 * @fence: fence to sync to
141 *
142 */
143int amdgpu_sync_fence(struct amdgpu_device *adev, struct amdgpu_sync *sync,
144 struct dma_fence *f)
145{
146 struct amdgpu_sync_entry *e;
147
148 if (!f)
149 return 0;
150
151 if (amdgpu_sync_same_dev(adev, f) &&
152 amdgpu_sync_get_owner(f) == AMDGPU_FENCE_OWNER_VM)
153 amdgpu_sync_keep_later(&sync->last_vm_update, f);
154
155 if (amdgpu_sync_add_later(sync, f))
156 return 0;
157
158 e = kmem_cache_alloc(amdgpu_sync_slab, GFP_KERNEL);
159 if (!e)
160 return -ENOMEM;
161
162 hash_add(sync->fences, &e->node, f->context);
163 e->fence = dma_fence_get(f);
164 return 0;
165}
166
167/**
168 * amdgpu_sync_resv - sync to a reservation object
169 *
170 * @sync: sync object to add fences from reservation object to
171 * @resv: reservation object with embedded fence
172 * @shared: true if we should only sync to the exclusive fence
173 *
174 * Sync to the fence
175 */
176int amdgpu_sync_resv(struct amdgpu_device *adev,
177 struct amdgpu_sync *sync,
178 struct reservation_object *resv,
179 void *owner)
180{
181 struct reservation_object_list *flist;
182 struct dma_fence *f;
183 void *fence_owner;
184 unsigned i;
185 int r = 0;
186
187 if (resv == NULL)
188 return -EINVAL;
189
190 /* always sync to the exclusive fence */
191 f = reservation_object_get_excl(resv);
192 r = amdgpu_sync_fence(adev, sync, f);
193
194 flist = reservation_object_get_list(resv);
195 if (!flist || r)
196 return r;
197
198 for (i = 0; i < flist->shared_count; ++i) {
199 f = rcu_dereference_protected(flist->shared[i],
200 reservation_object_held(resv));
201 if (amdgpu_sync_same_dev(adev, f)) {
202 /* VM updates are only interesting
203 * for other VM updates and moves.
204 */
205 fence_owner = amdgpu_sync_get_owner(f);
206 if ((owner != AMDGPU_FENCE_OWNER_UNDEFINED) &&
207 (fence_owner != AMDGPU_FENCE_OWNER_UNDEFINED) &&
208 ((owner == AMDGPU_FENCE_OWNER_VM) !=
209 (fence_owner == AMDGPU_FENCE_OWNER_VM)))
210 continue;
211
212 /* Ignore fence from the same owner as
213 * long as it isn't undefined.
214 */
215 if (owner != AMDGPU_FENCE_OWNER_UNDEFINED &&
216 fence_owner == owner)
217 continue;
218 }
219
220 r = amdgpu_sync_fence(adev, sync, f);
221 if (r)
222 break;
223 }
224 return r;
225}
226
227/**
228 * amdgpu_sync_peek_fence - get the next fence not signaled yet
229 *
230 * @sync: the sync object
231 * @ring: optional ring to use for test
232 *
233 * Returns the next fence not signaled yet without removing it from the sync
234 * object.
235 */
236struct dma_fence *amdgpu_sync_peek_fence(struct amdgpu_sync *sync,
237 struct amdgpu_ring *ring)
238{
239 struct amdgpu_sync_entry *e;
240 struct hlist_node *tmp;
241 int i;
242
243 hash_for_each_safe(sync->fences, i, tmp, e, node) {
244 struct dma_fence *f = e->fence;
245 struct amd_sched_fence *s_fence = to_amd_sched_fence(f);
246
247 if (ring && s_fence) {
248 /* For fences from the same ring it is sufficient
249 * when they are scheduled.
250 */
251 if (s_fence->sched == &ring->sched) {
252 if (dma_fence_is_signaled(&s_fence->scheduled))
253 continue;
254
255 return &s_fence->scheduled;
256 }
257 }
258
259 if (dma_fence_is_signaled(f)) {
260 hash_del(&e->node);
261 dma_fence_put(f);
262 kmem_cache_free(amdgpu_sync_slab, e);
263 continue;
264 }
265
266 return f;
267 }
268
269 return NULL;
270}
271
272/**
273 * amdgpu_sync_get_fence - get the next fence from the sync object
274 *
275 * @sync: sync object to use
276 *
277 * Get and removes the next fence from the sync object not signaled yet.
278 */
279struct dma_fence *amdgpu_sync_get_fence(struct amdgpu_sync *sync)
280{
281 struct amdgpu_sync_entry *e;
282 struct hlist_node *tmp;
283 struct dma_fence *f;
284 int i;
285
286 hash_for_each_safe(sync->fences, i, tmp, e, node) {
287
288 f = e->fence;
289
290 hash_del(&e->node);
291 kmem_cache_free(amdgpu_sync_slab, e);
292
293 if (!dma_fence_is_signaled(f))
294 return f;
295
296 dma_fence_put(f);
297 }
298 return NULL;
299}
300
301/**
302 * amdgpu_sync_free - free the sync object
303 *
304 * @sync: sync object to use
305 *
306 * Free the sync object.
307 */
308void amdgpu_sync_free(struct amdgpu_sync *sync)
309{
310 struct amdgpu_sync_entry *e;
311 struct hlist_node *tmp;
312 unsigned i;
313
314 hash_for_each_safe(sync->fences, i, tmp, e, node) {
315 hash_del(&e->node);
316 dma_fence_put(e->fence);
317 kmem_cache_free(amdgpu_sync_slab, e);
318 }
319
320 dma_fence_put(sync->last_vm_update);
321}
322
323/**
324 * amdgpu_sync_init - init sync object subsystem
325 *
326 * Allocate the slab allocator.
327 */
328int amdgpu_sync_init(void)
329{
330 amdgpu_sync_slab = kmem_cache_create(
331 "amdgpu_sync", sizeof(struct amdgpu_sync_entry), 0,
332 SLAB_HWCACHE_ALIGN, NULL);
333 if (!amdgpu_sync_slab)
334 return -ENOMEM;
335
336 return 0;
337}
338
339/**
340 * amdgpu_sync_fini - fini sync object subsystem
341 *
342 * Free the slab allocator.
343 */
344void amdgpu_sync_fini(void)
345{
346 kmem_cache_destroy(amdgpu_sync_slab);
347}