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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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44505168d7
Rather than stealing bits from i915_sw_fence function pointer use
separate fields for function pointer and flags. If using two different
fields, the 4 byte alignment for the i915_sw_fence function pointer can
also be dropped.
v2:
(CI)
- Set new function field rather than flags in __i915_sw_fence_init
v3:
(Tvrtko)
- Remove BUG_ON(!fence->flags) in reinit as that will now blow up
- Only define fence->flags if CONFIG_DRM_I915_SW_FENCE_CHECK_DAG is
defined
v4:
- Rebase, resend for CI
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Acked-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Alan Previn <alan.previn.teres.alexis@intel.com>
Signed-off-by: John Harrison <John.C.Harrison@Intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211116194929.10211-1-matthew.brost@intel.com
99 lines
2 KiB
C
99 lines
2 KiB
C
// SPDX-License-Identifier: MIT
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/*
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* Copyright © 2019 Intel Corporation
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*/
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#include "i915_sw_fence_work.h"
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static void fence_complete(struct dma_fence_work *f)
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{
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if (f->ops->release)
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f->ops->release(f);
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dma_fence_signal(&f->dma);
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}
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static void fence_work(struct work_struct *work)
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{
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struct dma_fence_work *f = container_of(work, typeof(*f), work);
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f->ops->work(f);
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fence_complete(f);
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dma_fence_put(&f->dma);
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}
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static int
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fence_notify(struct i915_sw_fence *fence, enum i915_sw_fence_notify state)
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{
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struct dma_fence_work *f = container_of(fence, typeof(*f), chain);
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switch (state) {
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case FENCE_COMPLETE:
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if (fence->error)
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dma_fence_set_error(&f->dma, fence->error);
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if (!f->dma.error) {
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dma_fence_get(&f->dma);
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if (test_bit(DMA_FENCE_WORK_IMM, &f->dma.flags))
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fence_work(&f->work);
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else
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queue_work(system_unbound_wq, &f->work);
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} else {
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fence_complete(f);
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}
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break;
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case FENCE_FREE:
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dma_fence_put(&f->dma);
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break;
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}
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return NOTIFY_DONE;
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}
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static const char *get_driver_name(struct dma_fence *fence)
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{
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return "dma-fence";
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}
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static const char *get_timeline_name(struct dma_fence *fence)
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{
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struct dma_fence_work *f = container_of(fence, typeof(*f), dma);
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return f->ops->name ?: "work";
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}
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static void fence_release(struct dma_fence *fence)
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{
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struct dma_fence_work *f = container_of(fence, typeof(*f), dma);
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i915_sw_fence_fini(&f->chain);
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BUILD_BUG_ON(offsetof(typeof(*f), dma));
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dma_fence_free(&f->dma);
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}
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static const struct dma_fence_ops fence_ops = {
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.get_driver_name = get_driver_name,
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.get_timeline_name = get_timeline_name,
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.release = fence_release,
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};
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void dma_fence_work_init(struct dma_fence_work *f,
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const struct dma_fence_work_ops *ops)
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{
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f->ops = ops;
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spin_lock_init(&f->lock);
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dma_fence_init(&f->dma, &fence_ops, &f->lock, 0, 0);
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i915_sw_fence_init(&f->chain, fence_notify);
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INIT_WORK(&f->work, fence_work);
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}
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int dma_fence_work_chain(struct dma_fence_work *f, struct dma_fence *signal)
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{
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if (!signal)
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return 0;
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return __i915_sw_fence_await_dma_fence(&f->chain, signal, &f->cb);
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}
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