461 lines
10 KiB
C
461 lines
10 KiB
C
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// SPDX-License-Identifier: MIT
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/*
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* Copyright 2014 Advanced Micro Devices, Inc.
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
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* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
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* USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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*/
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/*
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* Authors:
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* Christian König <christian.koenig@amd.com>
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*/
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#include <linux/dma-fence-chain.h>
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#include "amdgpu.h"
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#include "amdgpu_trace.h"
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#include "amdgpu_amdkfd.h"
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struct amdgpu_sync_entry {
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struct hlist_node node;
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struct dma_fence *fence;
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};
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static struct kmem_cache *amdgpu_sync_slab;
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/**
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* amdgpu_sync_create - zero init sync object
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*
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* @sync: sync object to initialize
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*
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* Just clear the sync object for now.
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*/
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void amdgpu_sync_create(struct amdgpu_sync *sync)
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{
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hash_init(sync->fences);
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}
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/**
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* amdgpu_sync_same_dev - test if fence belong to us
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*
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* @adev: amdgpu device to use for the test
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* @f: fence to test
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*
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* Test if the fence was issued by us.
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*/
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static bool amdgpu_sync_same_dev(struct amdgpu_device *adev,
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struct dma_fence *f)
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{
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struct drm_sched_fence *s_fence = to_drm_sched_fence(f);
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if (s_fence) {
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struct amdgpu_ring *ring;
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ring = container_of(s_fence->sched, struct amdgpu_ring, sched);
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return ring->adev == adev;
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}
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return false;
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}
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/**
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* amdgpu_sync_get_owner - extract the owner of a fence
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*
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* @f: fence get the owner from
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*
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* Extract who originally created the fence.
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*/
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static void *amdgpu_sync_get_owner(struct dma_fence *f)
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{
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struct drm_sched_fence *s_fence;
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struct amdgpu_amdkfd_fence *kfd_fence;
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if (!f)
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return AMDGPU_FENCE_OWNER_UNDEFINED;
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s_fence = to_drm_sched_fence(f);
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if (s_fence)
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return s_fence->owner;
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kfd_fence = to_amdgpu_amdkfd_fence(f);
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if (kfd_fence)
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return AMDGPU_FENCE_OWNER_KFD;
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return AMDGPU_FENCE_OWNER_UNDEFINED;
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}
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/**
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* amdgpu_sync_keep_later - Keep the later fence
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*
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* @keep: existing fence to test
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* @fence: new fence
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*
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* Either keep the existing fence or the new one, depending which one is later.
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*/
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static void amdgpu_sync_keep_later(struct dma_fence **keep,
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struct dma_fence *fence)
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{
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if (*keep && dma_fence_is_later(*keep, fence))
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return;
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dma_fence_put(*keep);
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*keep = dma_fence_get(fence);
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}
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/**
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* amdgpu_sync_add_later - add the fence to the hash
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*
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* @sync: sync object to add the fence to
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* @f: fence to add
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*
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* Tries to add the fence to an existing hash entry. Returns true when an entry
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* was found, false otherwise.
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*/
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static bool amdgpu_sync_add_later(struct amdgpu_sync *sync, struct dma_fence *f)
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{
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struct amdgpu_sync_entry *e;
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hash_for_each_possible(sync->fences, e, node, f->context) {
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if (unlikely(e->fence->context != f->context))
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continue;
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amdgpu_sync_keep_later(&e->fence, f);
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return true;
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}
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return false;
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}
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/**
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* amdgpu_sync_fence - remember to sync to this fence
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*
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* @sync: sync object to add fence to
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* @f: fence to sync to
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*
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* Add the fence to the sync object.
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*/
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int amdgpu_sync_fence(struct amdgpu_sync *sync, struct dma_fence *f)
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{
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struct amdgpu_sync_entry *e;
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if (!f)
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return 0;
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if (amdgpu_sync_add_later(sync, f))
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return 0;
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e = kmem_cache_alloc(amdgpu_sync_slab, GFP_KERNEL);
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if (!e)
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return -ENOMEM;
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hash_add(sync->fences, &e->node, f->context);
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e->fence = dma_fence_get(f);
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return 0;
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}
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/* Determine based on the owner and mode if we should sync to a fence or not */
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static bool amdgpu_sync_test_fence(struct amdgpu_device *adev,
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enum amdgpu_sync_mode mode,
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void *owner, struct dma_fence *f)
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{
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void *fence_owner = amdgpu_sync_get_owner(f);
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/* Always sync to moves, no matter what */
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if (fence_owner == AMDGPU_FENCE_OWNER_UNDEFINED)
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return true;
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/* We only want to trigger KFD eviction fences on
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* evict or move jobs. Skip KFD fences otherwise.
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*/
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if (fence_owner == AMDGPU_FENCE_OWNER_KFD &&
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owner != AMDGPU_FENCE_OWNER_UNDEFINED)
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return false;
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/* Never sync to VM updates either. */
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if (fence_owner == AMDGPU_FENCE_OWNER_VM &&
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owner != AMDGPU_FENCE_OWNER_UNDEFINED)
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return false;
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/* Ignore fences depending on the sync mode */
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switch (mode) {
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case AMDGPU_SYNC_ALWAYS:
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return true;
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case AMDGPU_SYNC_NE_OWNER:
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if (amdgpu_sync_same_dev(adev, f) &&
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fence_owner == owner)
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return false;
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break;
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case AMDGPU_SYNC_EQ_OWNER:
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if (amdgpu_sync_same_dev(adev, f) &&
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fence_owner != owner)
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return false;
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break;
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case AMDGPU_SYNC_EXPLICIT:
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return false;
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}
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WARN(debug_evictions && fence_owner == AMDGPU_FENCE_OWNER_KFD,
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"Adding eviction fence to sync obj");
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return true;
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}
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/**
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* amdgpu_sync_resv - sync to a reservation object
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*
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* @adev: amdgpu device
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* @sync: sync object to add fences from reservation object to
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* @resv: reservation object with embedded fence
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* @mode: how owner affects which fences we sync to
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* @owner: owner of the planned job submission
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*
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* Sync to the fence
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*/
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int amdgpu_sync_resv(struct amdgpu_device *adev, struct amdgpu_sync *sync,
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struct dma_resv *resv, enum amdgpu_sync_mode mode,
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void *owner)
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{
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struct dma_resv_iter cursor;
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struct dma_fence *f;
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int r;
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if (resv == NULL)
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return -EINVAL;
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/* TODO: Use DMA_RESV_USAGE_READ here */
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dma_resv_for_each_fence(&cursor, resv, DMA_RESV_USAGE_BOOKKEEP, f) {
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dma_fence_chain_for_each(f, f) {
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struct dma_fence *tmp = dma_fence_chain_contained(f);
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if (amdgpu_sync_test_fence(adev, mode, owner, tmp)) {
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r = amdgpu_sync_fence(sync, f);
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dma_fence_put(f);
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if (r)
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return r;
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break;
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}
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}
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}
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return 0;
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}
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/* Free the entry back to the slab */
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static void amdgpu_sync_entry_free(struct amdgpu_sync_entry *e)
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{
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hash_del(&e->node);
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dma_fence_put(e->fence);
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kmem_cache_free(amdgpu_sync_slab, e);
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}
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/**
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* amdgpu_sync_peek_fence - get the next fence not signaled yet
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*
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* @sync: the sync object
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* @ring: optional ring to use for test
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*
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* Returns the next fence not signaled yet without removing it from the sync
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* object.
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*/
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struct dma_fence *amdgpu_sync_peek_fence(struct amdgpu_sync *sync,
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struct amdgpu_ring *ring)
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{
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struct amdgpu_sync_entry *e;
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struct hlist_node *tmp;
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int i;
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hash_for_each_safe(sync->fences, i, tmp, e, node) {
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struct dma_fence *f = e->fence;
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struct drm_sched_fence *s_fence = to_drm_sched_fence(f);
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if (dma_fence_is_signaled(f)) {
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amdgpu_sync_entry_free(e);
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continue;
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}
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if (ring && s_fence) {
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/* For fences from the same ring it is sufficient
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* when they are scheduled.
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*/
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if (s_fence->sched == &ring->sched) {
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if (dma_fence_is_signaled(&s_fence->scheduled))
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continue;
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return &s_fence->scheduled;
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}
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}
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return f;
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}
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return NULL;
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}
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/**
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* amdgpu_sync_get_fence - get the next fence from the sync object
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*
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* @sync: sync object to use
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*
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* Get and removes the next fence from the sync object not signaled yet.
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*/
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struct dma_fence *amdgpu_sync_get_fence(struct amdgpu_sync *sync)
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{
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struct amdgpu_sync_entry *e;
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struct hlist_node *tmp;
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struct dma_fence *f;
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int i;
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hash_for_each_safe(sync->fences, i, tmp, e, node) {
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f = e->fence;
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hash_del(&e->node);
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kmem_cache_free(amdgpu_sync_slab, e);
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if (!dma_fence_is_signaled(f))
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return f;
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dma_fence_put(f);
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}
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return NULL;
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}
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/**
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* amdgpu_sync_clone - clone a sync object
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*
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* @source: sync object to clone
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* @clone: pointer to destination sync object
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*
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* Adds references to all unsignaled fences in @source to @clone. Also
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* removes signaled fences from @source while at it.
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*/
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int amdgpu_sync_clone(struct amdgpu_sync *source, struct amdgpu_sync *clone)
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{
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struct amdgpu_sync_entry *e;
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struct hlist_node *tmp;
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struct dma_fence *f;
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int i, r;
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hash_for_each_safe(source->fences, i, tmp, e, node) {
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f = e->fence;
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if (!dma_fence_is_signaled(f)) {
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r = amdgpu_sync_fence(clone, f);
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if (r)
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return r;
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} else {
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amdgpu_sync_entry_free(e);
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}
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}
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return 0;
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}
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/**
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* amdgpu_sync_push_to_job - push fences into job
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* @sync: sync object to get the fences from
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* @job: job to push the fences into
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*
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* Add all unsignaled fences from sync to job.
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*/
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int amdgpu_sync_push_to_job(struct amdgpu_sync *sync, struct amdgpu_job *job)
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{
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struct amdgpu_sync_entry *e;
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struct hlist_node *tmp;
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struct dma_fence *f;
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int i, r;
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hash_for_each_safe(sync->fences, i, tmp, e, node) {
|
||
|
|
f = e->fence;
|
||
|
|
if (dma_fence_is_signaled(f)) {
|
||
|
|
amdgpu_sync_entry_free(e);
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
dma_fence_get(f);
|
||
|
|
r = drm_sched_job_add_dependency(&job->base, f);
|
||
|
|
if (r) {
|
||
|
|
dma_fence_put(f);
|
||
|
|
return r;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
int amdgpu_sync_wait(struct amdgpu_sync *sync, bool intr)
|
||
|
|
{
|
||
|
|
struct amdgpu_sync_entry *e;
|
||
|
|
struct hlist_node *tmp;
|
||
|
|
int i, r;
|
||
|
|
|
||
|
|
hash_for_each_safe(sync->fences, i, tmp, e, node) {
|
||
|
|
r = dma_fence_wait(e->fence, intr);
|
||
|
|
if (r)
|
||
|
|
return r;
|
||
|
|
|
||
|
|
amdgpu_sync_entry_free(e);
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* amdgpu_sync_free - free the sync object
|
||
|
|
*
|
||
|
|
* @sync: sync object to use
|
||
|
|
*
|
||
|
|
* Free the sync object.
|
||
|
|
*/
|
||
|
|
void amdgpu_sync_free(struct amdgpu_sync *sync)
|
||
|
|
{
|
||
|
|
struct amdgpu_sync_entry *e;
|
||
|
|
struct hlist_node *tmp;
|
||
|
|
unsigned int i;
|
||
|
|
|
||
|
|
hash_for_each_safe(sync->fences, i, tmp, e, node)
|
||
|
|
amdgpu_sync_entry_free(e);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* amdgpu_sync_init - init sync object subsystem
|
||
|
|
*
|
||
|
|
* Allocate the slab allocator.
|
||
|
|
*/
|
||
|
|
int amdgpu_sync_init(void)
|
||
|
|
{
|
||
|
|
amdgpu_sync_slab = kmem_cache_create(
|
||
|
|
"amdgpu_sync", sizeof(struct amdgpu_sync_entry), 0,
|
||
|
|
SLAB_HWCACHE_ALIGN, NULL);
|
||
|
|
if (!amdgpu_sync_slab)
|
||
|
|
return -ENOMEM;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* amdgpu_sync_fini - fini sync object subsystem
|
||
|
|
*
|
||
|
|
* Free the slab allocator.
|
||
|
|
*/
|
||
|
|
void amdgpu_sync_fini(void)
|
||
|
|
{
|
||
|
|
kmem_cache_destroy(amdgpu_sync_slab);
|
||
|
|
}
|