From e5fd91f1ef340da553f7a79da9540c3db711c937 Mon Sep 17 00:00:00 2001 From: André Fabian Silva Delgado Date: Tue, 8 Sep 2015 01:01:14 -0300 Subject: Linux-libre 4.2-gnu --- drivers/gpu/drm/amd/amdgpu/amdgpu_sa.c | 419 +++++++++++++++++++++++++++++++++ 1 file changed, 419 insertions(+) create mode 100644 drivers/gpu/drm/amd/amdgpu/amdgpu_sa.c (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_sa.c') diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_sa.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_sa.c new file mode 100644 index 000000000..eb20987ce --- /dev/null +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_sa.c @@ -0,0 +1,419 @@ +/* + * Copyright 2011 Red Hat Inc. + * All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the + * "Software"), to deal in the Software without restriction, including + * without limitation the rights to use, copy, modify, merge, publish, + * distribute, sub license, and/or sell copies of the Software, and to + * permit persons to whom the Software is furnished to do so, subject to + * the following conditions: + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL + * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, + * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR + * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE + * USE OR OTHER DEALINGS IN THE SOFTWARE. + * + * The above copyright notice and this permission notice (including the + * next paragraph) shall be included in all copies or substantial portions + * of the Software. + * + */ +/* + * Authors: + * Jerome Glisse + */ +/* Algorithm: + * + * We store the last allocated bo in "hole", we always try to allocate + * after the last allocated bo. Principle is that in a linear GPU ring + * progression was is after last is the oldest bo we allocated and thus + * the first one that should no longer be in use by the GPU. + * + * If it's not the case we skip over the bo after last to the closest + * done bo if such one exist. If none exist and we are not asked to + * block we report failure to allocate. + * + * If we are asked to block we wait on all the oldest fence of all + * rings. We just wait for any of those fence to complete. + */ +#include +#include "amdgpu.h" + +static void amdgpu_sa_bo_remove_locked(struct amdgpu_sa_bo *sa_bo); +static void amdgpu_sa_bo_try_free(struct amdgpu_sa_manager *sa_manager); + +int amdgpu_sa_bo_manager_init(struct amdgpu_device *adev, + struct amdgpu_sa_manager *sa_manager, + unsigned size, u32 align, u32 domain) +{ + int i, r; + + init_waitqueue_head(&sa_manager->wq); + sa_manager->bo = NULL; + sa_manager->size = size; + sa_manager->domain = domain; + sa_manager->align = align; + sa_manager->hole = &sa_manager->olist; + INIT_LIST_HEAD(&sa_manager->olist); + for (i = 0; i < AMDGPU_MAX_RINGS; ++i) { + INIT_LIST_HEAD(&sa_manager->flist[i]); + } + + r = amdgpu_bo_create(adev, size, align, true, + domain, 0, NULL, &sa_manager->bo); + if (r) { + dev_err(adev->dev, "(%d) failed to allocate bo for manager\n", r); + return r; + } + + return r; +} + +void amdgpu_sa_bo_manager_fini(struct amdgpu_device *adev, + struct amdgpu_sa_manager *sa_manager) +{ + struct amdgpu_sa_bo *sa_bo, *tmp; + + if (!list_empty(&sa_manager->olist)) { + sa_manager->hole = &sa_manager->olist, + amdgpu_sa_bo_try_free(sa_manager); + if (!list_empty(&sa_manager->olist)) { + dev_err(adev->dev, "sa_manager is not empty, clearing anyway\n"); + } + } + list_for_each_entry_safe(sa_bo, tmp, &sa_manager->olist, olist) { + amdgpu_sa_bo_remove_locked(sa_bo); + } + amdgpu_bo_unref(&sa_manager->bo); + sa_manager->size = 0; +} + +int amdgpu_sa_bo_manager_start(struct amdgpu_device *adev, + struct amdgpu_sa_manager *sa_manager) +{ + int r; + + if (sa_manager->bo == NULL) { + dev_err(adev->dev, "no bo for sa manager\n"); + return -EINVAL; + } + + /* map the buffer */ + r = amdgpu_bo_reserve(sa_manager->bo, false); + if (r) { + dev_err(adev->dev, "(%d) failed to reserve manager bo\n", r); + return r; + } + r = amdgpu_bo_pin(sa_manager->bo, sa_manager->domain, &sa_manager->gpu_addr); + if (r) { + amdgpu_bo_unreserve(sa_manager->bo); + dev_err(adev->dev, "(%d) failed to pin manager bo\n", r); + return r; + } + r = amdgpu_bo_kmap(sa_manager->bo, &sa_manager->cpu_ptr); + amdgpu_bo_unreserve(sa_manager->bo); + return r; +} + +int amdgpu_sa_bo_manager_suspend(struct amdgpu_device *adev, + struct amdgpu_sa_manager *sa_manager) +{ + int r; + + if (sa_manager->bo == NULL) { + dev_err(adev->dev, "no bo for sa manager\n"); + return -EINVAL; + } + + r = amdgpu_bo_reserve(sa_manager->bo, false); + if (!r) { + amdgpu_bo_kunmap(sa_manager->bo); + amdgpu_bo_unpin(sa_manager->bo); + amdgpu_bo_unreserve(sa_manager->bo); + } + return r; +} + +static void amdgpu_sa_bo_remove_locked(struct amdgpu_sa_bo *sa_bo) +{ + struct amdgpu_sa_manager *sa_manager = sa_bo->manager; + if (sa_manager->hole == &sa_bo->olist) { + sa_manager->hole = sa_bo->olist.prev; + } + list_del_init(&sa_bo->olist); + list_del_init(&sa_bo->flist); + amdgpu_fence_unref(&sa_bo->fence); + kfree(sa_bo); +} + +static void amdgpu_sa_bo_try_free(struct amdgpu_sa_manager *sa_manager) +{ + struct amdgpu_sa_bo *sa_bo, *tmp; + + if (sa_manager->hole->next == &sa_manager->olist) + return; + + sa_bo = list_entry(sa_manager->hole->next, struct amdgpu_sa_bo, olist); + list_for_each_entry_safe_from(sa_bo, tmp, &sa_manager->olist, olist) { + if (sa_bo->fence == NULL || !amdgpu_fence_signaled(sa_bo->fence)) { + return; + } + amdgpu_sa_bo_remove_locked(sa_bo); + } +} + +static inline unsigned amdgpu_sa_bo_hole_soffset(struct amdgpu_sa_manager *sa_manager) +{ + struct list_head *hole = sa_manager->hole; + + if (hole != &sa_manager->olist) { + return list_entry(hole, struct amdgpu_sa_bo, olist)->eoffset; + } + return 0; +} + +static inline unsigned amdgpu_sa_bo_hole_eoffset(struct amdgpu_sa_manager *sa_manager) +{ + struct list_head *hole = sa_manager->hole; + + if (hole->next != &sa_manager->olist) { + return list_entry(hole->next, struct amdgpu_sa_bo, olist)->soffset; + } + return sa_manager->size; +} + +static bool amdgpu_sa_bo_try_alloc(struct amdgpu_sa_manager *sa_manager, + struct amdgpu_sa_bo *sa_bo, + unsigned size, unsigned align) +{ + unsigned soffset, eoffset, wasted; + + soffset = amdgpu_sa_bo_hole_soffset(sa_manager); + eoffset = amdgpu_sa_bo_hole_eoffset(sa_manager); + wasted = (align - (soffset % align)) % align; + + if ((eoffset - soffset) >= (size + wasted)) { + soffset += wasted; + + sa_bo->manager = sa_manager; + sa_bo->soffset = soffset; + sa_bo->eoffset = soffset + size; + list_add(&sa_bo->olist, sa_manager->hole); + INIT_LIST_HEAD(&sa_bo->flist); + sa_manager->hole = &sa_bo->olist; + return true; + } + return false; +} + +/** + * amdgpu_sa_event - Check if we can stop waiting + * + * @sa_manager: pointer to the sa_manager + * @size: number of bytes we want to allocate + * @align: alignment we need to match + * + * Check if either there is a fence we can wait for or + * enough free memory to satisfy the allocation directly + */ +static bool amdgpu_sa_event(struct amdgpu_sa_manager *sa_manager, + unsigned size, unsigned align) +{ + unsigned soffset, eoffset, wasted; + int i; + + for (i = 0; i < AMDGPU_MAX_RINGS; ++i) { + if (!list_empty(&sa_manager->flist[i])) { + return true; + } + } + + soffset = amdgpu_sa_bo_hole_soffset(sa_manager); + eoffset = amdgpu_sa_bo_hole_eoffset(sa_manager); + wasted = (align - (soffset % align)) % align; + + if ((eoffset - soffset) >= (size + wasted)) { + return true; + } + + return false; +} + +static bool amdgpu_sa_bo_next_hole(struct amdgpu_sa_manager *sa_manager, + struct amdgpu_fence **fences, + unsigned *tries) +{ + struct amdgpu_sa_bo *best_bo = NULL; + unsigned i, soffset, best, tmp; + + /* if hole points to the end of the buffer */ + if (sa_manager->hole->next == &sa_manager->olist) { + /* try again with its beginning */ + sa_manager->hole = &sa_manager->olist; + return true; + } + + soffset = amdgpu_sa_bo_hole_soffset(sa_manager); + /* to handle wrap around we add sa_manager->size */ + best = sa_manager->size * 2; + /* go over all fence list and try to find the closest sa_bo + * of the current last + */ + for (i = 0; i < AMDGPU_MAX_RINGS; ++i) { + struct amdgpu_sa_bo *sa_bo; + + if (list_empty(&sa_manager->flist[i])) { + continue; + } + + sa_bo = list_first_entry(&sa_manager->flist[i], + struct amdgpu_sa_bo, flist); + + if (!amdgpu_fence_signaled(sa_bo->fence)) { + fences[i] = sa_bo->fence; + continue; + } + + /* limit the number of tries each ring gets */ + if (tries[i] > 2) { + continue; + } + + tmp = sa_bo->soffset; + if (tmp < soffset) { + /* wrap around, pretend it's after */ + tmp += sa_manager->size; + } + tmp -= soffset; + if (tmp < best) { + /* this sa bo is the closest one */ + best = tmp; + best_bo = sa_bo; + } + } + + if (best_bo) { + ++tries[best_bo->fence->ring->idx]; + sa_manager->hole = best_bo->olist.prev; + + /* we knew that this one is signaled, + so it's save to remote it */ + amdgpu_sa_bo_remove_locked(best_bo); + return true; + } + return false; +} + +int amdgpu_sa_bo_new(struct amdgpu_device *adev, + struct amdgpu_sa_manager *sa_manager, + struct amdgpu_sa_bo **sa_bo, + unsigned size, unsigned align) +{ + struct amdgpu_fence *fences[AMDGPU_MAX_RINGS]; + unsigned tries[AMDGPU_MAX_RINGS]; + int i, r; + + BUG_ON(align > sa_manager->align); + BUG_ON(size > sa_manager->size); + + *sa_bo = kmalloc(sizeof(struct amdgpu_sa_bo), GFP_KERNEL); + if ((*sa_bo) == NULL) { + return -ENOMEM; + } + (*sa_bo)->manager = sa_manager; + (*sa_bo)->fence = NULL; + INIT_LIST_HEAD(&(*sa_bo)->olist); + INIT_LIST_HEAD(&(*sa_bo)->flist); + + spin_lock(&sa_manager->wq.lock); + do { + for (i = 0; i < AMDGPU_MAX_RINGS; ++i) { + fences[i] = NULL; + tries[i] = 0; + } + + do { + amdgpu_sa_bo_try_free(sa_manager); + + if (amdgpu_sa_bo_try_alloc(sa_manager, *sa_bo, + size, align)) { + spin_unlock(&sa_manager->wq.lock); + return 0; + } + + /* see if we can skip over some allocations */ + } while (amdgpu_sa_bo_next_hole(sa_manager, fences, tries)); + + spin_unlock(&sa_manager->wq.lock); + r = amdgpu_fence_wait_any(adev, fences, false); + spin_lock(&sa_manager->wq.lock); + /* if we have nothing to wait for block */ + if (r == -ENOENT) { + r = wait_event_interruptible_locked( + sa_manager->wq, + amdgpu_sa_event(sa_manager, size, align) + ); + } + + } while (!r); + + spin_unlock(&sa_manager->wq.lock); + kfree(*sa_bo); + *sa_bo = NULL; + return r; +} + +void amdgpu_sa_bo_free(struct amdgpu_device *adev, struct amdgpu_sa_bo **sa_bo, + struct amdgpu_fence *fence) +{ + struct amdgpu_sa_manager *sa_manager; + + if (sa_bo == NULL || *sa_bo == NULL) { + return; + } + + sa_manager = (*sa_bo)->manager; + spin_lock(&sa_manager->wq.lock); + if (fence && !amdgpu_fence_signaled(fence)) { + (*sa_bo)->fence = amdgpu_fence_ref(fence); + list_add_tail(&(*sa_bo)->flist, + &sa_manager->flist[fence->ring->idx]); + } else { + amdgpu_sa_bo_remove_locked(*sa_bo); + } + wake_up_all_locked(&sa_manager->wq); + spin_unlock(&sa_manager->wq.lock); + *sa_bo = NULL; +} + +#if defined(CONFIG_DEBUG_FS) +void amdgpu_sa_bo_dump_debug_info(struct amdgpu_sa_manager *sa_manager, + struct seq_file *m) +{ + struct amdgpu_sa_bo *i; + + spin_lock(&sa_manager->wq.lock); + list_for_each_entry(i, &sa_manager->olist, olist) { + uint64_t soffset = i->soffset + sa_manager->gpu_addr; + uint64_t eoffset = i->eoffset + sa_manager->gpu_addr; + if (&i->olist == sa_manager->hole) { + seq_printf(m, ">"); + } else { + seq_printf(m, " "); + } + seq_printf(m, "[0x%010llx 0x%010llx] size %8lld", + soffset, eoffset, eoffset - soffset); + if (i->fence) { + seq_printf(m, " protected by 0x%016llx on ring %d", + i->fence->seq, i->fence->ring->idx); + } + seq_printf(m, "\n"); + } + spin_unlock(&sa_manager->wq.lock); +} +#endif -- cgit v1.2.3-54-g00ecf