2 * Copyright 2011 Red Hat Inc.
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32 * We store the last allocated bo in "hole", we always try to allocate
33 * after the last allocated bo. Principle is that in a linear GPU ring
34 * progression was is after last is the oldest bo we allocated and thus
35 * the first one that should no longer be in use by the GPU.
37 * If it's not the case we skip over the bo after last to the closest
38 * done bo if such one exist. If none exist and we are not asked to
39 * block we report failure to allocate.
41 * If we are asked to block we wait on all the oldest fence of all
42 * rings. We just wait for any of those fence to complete.
47 static void amdgpu_sa_bo_remove_locked(struct amdgpu_sa_bo *sa_bo);
48 static void amdgpu_sa_bo_try_free(struct amdgpu_sa_manager *sa_manager);
50 int amdgpu_sa_bo_manager_init(struct amdgpu_device *adev,
51 struct amdgpu_sa_manager *sa_manager,
52 unsigned size, u32 align, u32 domain)
56 init_waitqueue_head(&sa_manager->wq);
57 sa_manager->bo = NULL;
58 sa_manager->size = size;
59 sa_manager->domain = domain;
60 sa_manager->align = align;
61 sa_manager->hole = &sa_manager->olist;
62 INIT_LIST_HEAD(&sa_manager->olist);
63 for (i = 0; i < AMDGPU_SA_NUM_FENCE_LISTS; ++i)
64 INIT_LIST_HEAD(&sa_manager->flist[i]);
66 r = amdgpu_bo_create(adev, size, align, true, domain,
67 0, NULL, NULL, &sa_manager->bo);
69 dev_err(adev->dev, "(%d) failed to allocate bo for manager\n", r);
76 void amdgpu_sa_bo_manager_fini(struct amdgpu_device *adev,
77 struct amdgpu_sa_manager *sa_manager)
79 struct amdgpu_sa_bo *sa_bo, *tmp;
81 if (!list_empty(&sa_manager->olist)) {
82 sa_manager->hole = &sa_manager->olist,
83 amdgpu_sa_bo_try_free(sa_manager);
84 if (!list_empty(&sa_manager->olist)) {
85 dev_err(adev->dev, "sa_manager is not empty, clearing anyway\n");
88 list_for_each_entry_safe(sa_bo, tmp, &sa_manager->olist, olist) {
89 amdgpu_sa_bo_remove_locked(sa_bo);
91 amdgpu_bo_unref(&sa_manager->bo);
95 int amdgpu_sa_bo_manager_start(struct amdgpu_device *adev,
96 struct amdgpu_sa_manager *sa_manager)
100 if (sa_manager->bo == NULL) {
101 dev_err(adev->dev, "no bo for sa manager\n");
106 r = amdgpu_bo_reserve(sa_manager->bo, false);
108 dev_err(adev->dev, "(%d) failed to reserve manager bo\n", r);
111 r = amdgpu_bo_pin(sa_manager->bo, sa_manager->domain, &sa_manager->gpu_addr);
113 amdgpu_bo_unreserve(sa_manager->bo);
114 dev_err(adev->dev, "(%d) failed to pin manager bo\n", r);
117 r = amdgpu_bo_kmap(sa_manager->bo, &sa_manager->cpu_ptr);
118 memset(sa_manager->cpu_ptr, 0, sa_manager->size);
119 amdgpu_bo_unreserve(sa_manager->bo);
123 int amdgpu_sa_bo_manager_suspend(struct amdgpu_device *adev,
124 struct amdgpu_sa_manager *sa_manager)
128 if (sa_manager->bo == NULL) {
129 dev_err(adev->dev, "no bo for sa manager\n");
133 r = amdgpu_bo_reserve(sa_manager->bo, false);
135 amdgpu_bo_kunmap(sa_manager->bo);
136 amdgpu_bo_unpin(sa_manager->bo);
137 amdgpu_bo_unreserve(sa_manager->bo);
142 static void amdgpu_sa_bo_remove_locked(struct amdgpu_sa_bo *sa_bo)
144 struct amdgpu_sa_manager *sa_manager = sa_bo->manager;
145 if (sa_manager->hole == &sa_bo->olist) {
146 sa_manager->hole = sa_bo->olist.prev;
148 list_del_init(&sa_bo->olist);
149 list_del_init(&sa_bo->flist);
150 fence_put(sa_bo->fence);
154 static void amdgpu_sa_bo_try_free(struct amdgpu_sa_manager *sa_manager)
156 struct amdgpu_sa_bo *sa_bo, *tmp;
158 if (sa_manager->hole->next == &sa_manager->olist)
161 sa_bo = list_entry(sa_manager->hole->next, struct amdgpu_sa_bo, olist);
162 list_for_each_entry_safe_from(sa_bo, tmp, &sa_manager->olist, olist) {
163 if (sa_bo->fence == NULL ||
164 !fence_is_signaled(sa_bo->fence)) {
167 amdgpu_sa_bo_remove_locked(sa_bo);
171 static inline unsigned amdgpu_sa_bo_hole_soffset(struct amdgpu_sa_manager *sa_manager)
173 struct list_head *hole = sa_manager->hole;
175 if (hole != &sa_manager->olist) {
176 return list_entry(hole, struct amdgpu_sa_bo, olist)->eoffset;
181 static inline unsigned amdgpu_sa_bo_hole_eoffset(struct amdgpu_sa_manager *sa_manager)
183 struct list_head *hole = sa_manager->hole;
185 if (hole->next != &sa_manager->olist) {
186 return list_entry(hole->next, struct amdgpu_sa_bo, olist)->soffset;
188 return sa_manager->size;
191 static bool amdgpu_sa_bo_try_alloc(struct amdgpu_sa_manager *sa_manager,
192 struct amdgpu_sa_bo *sa_bo,
193 unsigned size, unsigned align)
195 unsigned soffset, eoffset, wasted;
197 soffset = amdgpu_sa_bo_hole_soffset(sa_manager);
198 eoffset = amdgpu_sa_bo_hole_eoffset(sa_manager);
199 wasted = (align - (soffset % align)) % align;
201 if ((eoffset - soffset) >= (size + wasted)) {
204 sa_bo->manager = sa_manager;
205 sa_bo->soffset = soffset;
206 sa_bo->eoffset = soffset + size;
207 list_add(&sa_bo->olist, sa_manager->hole);
208 INIT_LIST_HEAD(&sa_bo->flist);
209 sa_manager->hole = &sa_bo->olist;
216 * amdgpu_sa_event - Check if we can stop waiting
218 * @sa_manager: pointer to the sa_manager
219 * @size: number of bytes we want to allocate
220 * @align: alignment we need to match
222 * Check if either there is a fence we can wait for or
223 * enough free memory to satisfy the allocation directly
225 static bool amdgpu_sa_event(struct amdgpu_sa_manager *sa_manager,
226 unsigned size, unsigned align)
228 unsigned soffset, eoffset, wasted;
231 for (i = 0; i < AMDGPU_SA_NUM_FENCE_LISTS; ++i)
232 if (!list_empty(&sa_manager->flist[i]))
235 soffset = amdgpu_sa_bo_hole_soffset(sa_manager);
236 eoffset = amdgpu_sa_bo_hole_eoffset(sa_manager);
237 wasted = (align - (soffset % align)) % align;
239 if ((eoffset - soffset) >= (size + wasted)) {
246 static bool amdgpu_sa_bo_next_hole(struct amdgpu_sa_manager *sa_manager,
247 struct fence **fences,
250 struct amdgpu_sa_bo *best_bo = NULL;
251 unsigned i, soffset, best, tmp;
253 /* if hole points to the end of the buffer */
254 if (sa_manager->hole->next == &sa_manager->olist) {
255 /* try again with its beginning */
256 sa_manager->hole = &sa_manager->olist;
260 soffset = amdgpu_sa_bo_hole_soffset(sa_manager);
261 /* to handle wrap around we add sa_manager->size */
262 best = sa_manager->size * 2;
263 /* go over all fence list and try to find the closest sa_bo
264 * of the current last
266 for (i = 0; i < AMDGPU_SA_NUM_FENCE_LISTS; ++i) {
267 struct amdgpu_sa_bo *sa_bo;
269 if (list_empty(&sa_manager->flist[i]))
272 sa_bo = list_first_entry(&sa_manager->flist[i],
273 struct amdgpu_sa_bo, flist);
275 if (!fence_is_signaled(sa_bo->fence)) {
276 fences[i] = sa_bo->fence;
280 /* limit the number of tries each ring gets */
285 tmp = sa_bo->soffset;
287 /* wrap around, pretend it's after */
288 tmp += sa_manager->size;
292 /* this sa bo is the closest one */
299 uint32_t idx = best_bo->fence->context;
301 idx %= AMDGPU_SA_NUM_FENCE_LISTS;
303 sa_manager->hole = best_bo->olist.prev;
305 /* we knew that this one is signaled,
306 so it's save to remote it */
307 amdgpu_sa_bo_remove_locked(best_bo);
313 int amdgpu_sa_bo_new(struct amdgpu_sa_manager *sa_manager,
314 struct amdgpu_sa_bo **sa_bo,
315 unsigned size, unsigned align)
317 struct fence *fences[AMDGPU_SA_NUM_FENCE_LISTS];
318 unsigned tries[AMDGPU_SA_NUM_FENCE_LISTS];
323 if (WARN_ON_ONCE(align > sa_manager->align))
326 if (WARN_ON_ONCE(size > sa_manager->size))
329 *sa_bo = kmalloc(sizeof(struct amdgpu_sa_bo), GFP_KERNEL);
330 if ((*sa_bo) == NULL) {
333 (*sa_bo)->manager = sa_manager;
334 (*sa_bo)->fence = NULL;
335 INIT_LIST_HEAD(&(*sa_bo)->olist);
336 INIT_LIST_HEAD(&(*sa_bo)->flist);
338 spin_lock(&sa_manager->wq.lock);
340 for (i = 0; i < AMDGPU_SA_NUM_FENCE_LISTS; ++i) {
346 amdgpu_sa_bo_try_free(sa_manager);
348 if (amdgpu_sa_bo_try_alloc(sa_manager, *sa_bo,
350 spin_unlock(&sa_manager->wq.lock);
354 /* see if we can skip over some allocations */
355 } while (amdgpu_sa_bo_next_hole(sa_manager, fences, tries));
357 for (i = 0, count = 0; i < AMDGPU_SA_NUM_FENCE_LISTS; ++i)
359 fences[count++] = fence_get(fences[i]);
362 spin_unlock(&sa_manager->wq.lock);
363 t = fence_wait_any_timeout(fences, count, false,
364 MAX_SCHEDULE_TIMEOUT);
365 for (i = 0; i < count; ++i)
366 fence_put(fences[i]);
369 spin_lock(&sa_manager->wq.lock);
371 /* if we have nothing to wait for block */
372 r = wait_event_interruptible_locked(
374 amdgpu_sa_event(sa_manager, size, align)
380 spin_unlock(&sa_manager->wq.lock);
386 void amdgpu_sa_bo_free(struct amdgpu_device *adev, struct amdgpu_sa_bo **sa_bo,
389 struct amdgpu_sa_manager *sa_manager;
391 if (sa_bo == NULL || *sa_bo == NULL) {
395 sa_manager = (*sa_bo)->manager;
396 spin_lock(&sa_manager->wq.lock);
397 if (fence && !fence_is_signaled(fence)) {
400 (*sa_bo)->fence = fence_get(fence);
401 idx = fence->context % AMDGPU_SA_NUM_FENCE_LISTS;
402 list_add_tail(&(*sa_bo)->flist, &sa_manager->flist[idx]);
404 amdgpu_sa_bo_remove_locked(*sa_bo);
406 wake_up_all_locked(&sa_manager->wq);
407 spin_unlock(&sa_manager->wq.lock);
411 #if defined(CONFIG_DEBUG_FS)
413 void amdgpu_sa_bo_dump_debug_info(struct amdgpu_sa_manager *sa_manager,
416 struct amdgpu_sa_bo *i;
418 spin_lock(&sa_manager->wq.lock);
419 list_for_each_entry(i, &sa_manager->olist, olist) {
420 uint64_t soffset = i->soffset + sa_manager->gpu_addr;
421 uint64_t eoffset = i->eoffset + sa_manager->gpu_addr;
422 if (&i->olist == sa_manager->hole) {
427 seq_printf(m, "[0x%010llx 0x%010llx] size %8lld",
428 soffset, eoffset, eoffset - soffset);
431 seq_printf(m, " protected by 0x%08x on context %llu",
432 i->fence->seqno, i->fence->context);
436 spin_unlock(&sa_manager->wq.lock);