![Chris Wilson](/assets/img/avatar_default.png)
I plan to usurp the short name of struct fence for a core kernel struct, and so I need to rename the specialised fence/timeline for DMA operations to make room. A consensus was reached in https://lists.freedesktop.org/archives/dri-devel/2016-July/113083.html that making clear this fence applies to DMA operations was a good thing. Since then the patch has grown a bit as usage increases, so hopefully it remains a good thing! (v2...: rebase, rerun spatch) v3: Compile on msm, spotted a manual fixup that I broke. v4: Try again for msm, sorry Daniel coccinelle script: @@ @@ - struct fence + struct dma_fence @@ @@ - struct fence_ops + struct dma_fence_ops @@ @@ - struct fence_cb + struct dma_fence_cb @@ @@ - struct fence_array + struct dma_fence_array @@ @@ - enum fence_flag_bits + enum dma_fence_flag_bits @@ @@ ( - fence_init + dma_fence_init | - fence_release + dma_fence_release | - fence_free + dma_fence_free | - fence_get + dma_fence_get | - fence_get_rcu + dma_fence_get_rcu | - fence_put + dma_fence_put | - fence_signal + dma_fence_signal | - fence_signal_locked + dma_fence_signal_locked | - fence_default_wait + dma_fence_default_wait | - fence_add_callback + dma_fence_add_callback | - fence_remove_callback + dma_fence_remove_callback | - fence_enable_sw_signaling + dma_fence_enable_sw_signaling | - fence_is_signaled_locked + dma_fence_is_signaled_locked | - fence_is_signaled + dma_fence_is_signaled | - fence_is_later + dma_fence_is_later | - fence_later + dma_fence_later | - fence_wait_timeout + dma_fence_wait_timeout | - fence_wait_any_timeout + dma_fence_wait_any_timeout | - fence_wait + dma_fence_wait | - fence_context_alloc + dma_fence_context_alloc | - fence_array_create + dma_fence_array_create | - to_fence_array + to_dma_fence_array | - fence_is_array + dma_fence_is_array | - trace_fence_emit + trace_dma_fence_emit | - FENCE_TRACE + DMA_FENCE_TRACE | - FENCE_WARN + DMA_FENCE_WARN | - FENCE_ERR + DMA_FENCE_ERR ) ( ... ) Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Reviewed-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk> Acked-by: Sumit Semwal <sumit.semwal@linaro.org> Acked-by: Christian König <christian.koenig@amd.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: http://patchwork.freedesktop.org/patch/msgid/20161025120045.28839-1-chris@chris-wilson.co.uk
120 lines
3.7 KiB
C
120 lines
3.7 KiB
C
/*
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* Copyright (C) 2015 Red Hat, 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
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* a 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, sublicense, 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 above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial
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* portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include <drm/drmP.h>
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#include "virtgpu_drv.h"
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static const char *virtio_get_driver_name(struct dma_fence *f)
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{
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return "virtio_gpu";
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}
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static const char *virtio_get_timeline_name(struct dma_fence *f)
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{
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return "controlq";
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}
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static bool virtio_enable_signaling(struct dma_fence *f)
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{
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return true;
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}
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static bool virtio_signaled(struct dma_fence *f)
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{
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struct virtio_gpu_fence *fence = to_virtio_fence(f);
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if (atomic64_read(&fence->drv->last_seq) >= fence->seq)
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return true;
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return false;
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}
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static void virtio_fence_value_str(struct dma_fence *f, char *str, int size)
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{
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struct virtio_gpu_fence *fence = to_virtio_fence(f);
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snprintf(str, size, "%llu", fence->seq);
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}
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static void virtio_timeline_value_str(struct dma_fence *f, char *str, int size)
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{
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struct virtio_gpu_fence *fence = to_virtio_fence(f);
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snprintf(str, size, "%llu", (u64)atomic64_read(&fence->drv->last_seq));
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}
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static const struct dma_fence_ops virtio_fence_ops = {
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.get_driver_name = virtio_get_driver_name,
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.get_timeline_name = virtio_get_timeline_name,
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.enable_signaling = virtio_enable_signaling,
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.signaled = virtio_signaled,
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.wait = dma_fence_default_wait,
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.fence_value_str = virtio_fence_value_str,
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.timeline_value_str = virtio_timeline_value_str,
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};
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int virtio_gpu_fence_emit(struct virtio_gpu_device *vgdev,
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struct virtio_gpu_ctrl_hdr *cmd_hdr,
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struct virtio_gpu_fence **fence)
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{
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struct virtio_gpu_fence_driver *drv = &vgdev->fence_drv;
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unsigned long irq_flags;
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*fence = kmalloc(sizeof(struct virtio_gpu_fence), GFP_ATOMIC);
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if ((*fence) == NULL)
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return -ENOMEM;
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spin_lock_irqsave(&drv->lock, irq_flags);
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(*fence)->drv = drv;
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(*fence)->seq = ++drv->sync_seq;
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dma_fence_init(&(*fence)->f, &virtio_fence_ops, &drv->lock,
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drv->context, (*fence)->seq);
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dma_fence_get(&(*fence)->f);
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list_add_tail(&(*fence)->node, &drv->fences);
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spin_unlock_irqrestore(&drv->lock, irq_flags);
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cmd_hdr->flags |= cpu_to_le32(VIRTIO_GPU_FLAG_FENCE);
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cmd_hdr->fence_id = cpu_to_le64((*fence)->seq);
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return 0;
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}
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void virtio_gpu_fence_event_process(struct virtio_gpu_device *vgdev,
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u64 last_seq)
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{
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struct virtio_gpu_fence_driver *drv = &vgdev->fence_drv;
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struct virtio_gpu_fence *fence, *tmp;
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unsigned long irq_flags;
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spin_lock_irqsave(&drv->lock, irq_flags);
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atomic64_set(&vgdev->fence_drv.last_seq, last_seq);
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list_for_each_entry_safe(fence, tmp, &drv->fences, node) {
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if (last_seq < fence->seq)
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continue;
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dma_fence_signal_locked(&fence->f);
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list_del(&fence->node);
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dma_fence_put(&fence->f);
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}
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spin_unlock_irqrestore(&drv->lock, irq_flags);
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}
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