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https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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a242a3e4b5
The basic idea in this redesign is to add an eviction fence only in UQ
resume path. When userqueue is not present, keep ev_fence as NULL
Main changes are:
- do not create the eviction fence during evf_mgr_init, keeping
evf_mgr->ev_fence=NULL until UQ get active.
- do not replace the ev_fence in evf_resume path, but replace it only in
uq_resume path, so remove all the unnecessary code from ev_fence_resume.
- add a new helper function (amdgpu_userqueue_ensure_ev_fence) which
will do the following:
- flush any pending uq_resume work, so that it could create an
eviction_fence
- if there is no pending uq_resume_work, add a uq_resume work and
wait for it to execute so that we always have a valid ev_fence
- call this helper function from two places, to ensure we have a valid
ev_fence:
- when a new uq is created
- when a new uq completion fence is created
v2: Worked on review comments by Christian.
v3: Addressed few more review comments by Christian.
v4: Move mutex lock outside of the amdgpu_userqueue_suspend()
function (Christian).
v5: squash in build fix (Alex)
Cc: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Arvind Yadav <arvind.yadav@amd.com>
Signed-off-by: Shashank Sharma <shashank.sharma@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
70 lines
2.3 KiB
C
70 lines
2.3 KiB
C
/* SPDX-License-Identifier: MIT */
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/*
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* Copyright 2023 Advanced Micro Devices, Inc.
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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 "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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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 NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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*/
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#ifndef AMDGPU_EV_FENCE_H_
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#define AMDGPU_EV_FENCE_H_
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struct amdgpu_eviction_fence {
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struct dma_fence base;
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spinlock_t lock;
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char timeline_name[TASK_COMM_LEN];
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struct amdgpu_eviction_fence_mgr *evf_mgr;
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};
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struct amdgpu_eviction_fence_mgr {
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u64 ev_fence_ctx;
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atomic_t ev_fence_seq;
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spinlock_t ev_fence_lock;
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struct amdgpu_eviction_fence *ev_fence;
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struct delayed_work suspend_work;
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uint8_t fd_closing;
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};
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/* Eviction fence helper functions */
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struct amdgpu_eviction_fence *
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amdgpu_eviction_fence_create(struct amdgpu_eviction_fence_mgr *evf_mgr);
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void
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amdgpu_eviction_fence_destroy(struct amdgpu_eviction_fence_mgr *evf_mgr);
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int
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amdgpu_eviction_fence_attach(struct amdgpu_eviction_fence_mgr *evf_mgr,
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struct amdgpu_bo *bo);
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void
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amdgpu_eviction_fence_detach(struct amdgpu_eviction_fence_mgr *evf_mgr,
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struct amdgpu_bo *bo);
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int
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amdgpu_eviction_fence_init(struct amdgpu_eviction_fence_mgr *evf_mgr);
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void
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amdgpu_eviction_fence_signal(struct amdgpu_eviction_fence_mgr *evf_mgr,
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struct amdgpu_eviction_fence *ev_fence);
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int
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amdgpu_eviction_fence_replace_fence(struct amdgpu_eviction_fence_mgr *evf_mgr,
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struct drm_exec *exec);
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#endif
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