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1// SPDX-License-Identifier: MIT2 3/*4 * Copyright © 2019 Intel Corporation5 */6 7#include "i915_sw_fence_work.h"8 9static void fence_complete(struct dma_fence_work *f)10{11 if (f->ops->release)12 f->ops->release(f);13 dma_fence_signal(&f->dma);14}15 16static void fence_work(struct work_struct *work)17{18 struct dma_fence_work *f = container_of(work, typeof(*f), work);19 20 f->ops->work(f);21 22 fence_complete(f);23 dma_fence_put(&f->dma);24}25 26static int27fence_notify(struct i915_sw_fence *fence, enum i915_sw_fence_notify state)28{29 struct dma_fence_work *f = container_of(fence, typeof(*f), chain);30 31 switch (state) {32 case FENCE_COMPLETE:33 if (fence->error)34 dma_fence_set_error(&f->dma, fence->error);35 36 if (!f->dma.error) {37 dma_fence_get(&f->dma);38 if (test_bit(DMA_FENCE_WORK_IMM, &f->dma.flags))39 fence_work(&f->work);40 else41 queue_work(system_unbound_wq, &f->work);42 } else {43 fence_complete(f);44 }45 break;46 47 case FENCE_FREE:48 dma_fence_put(&f->dma);49 break;50 }51 52 return NOTIFY_DONE;53}54 55static const char *get_driver_name(struct dma_fence *fence)56{57 return "dma-fence";58}59 60static const char *get_timeline_name(struct dma_fence *fence)61{62 struct dma_fence_work *f = container_of(fence, typeof(*f), dma);63 64 return f->ops->name ?: "work";65}66 67static void fence_release(struct dma_fence *fence)68{69 struct dma_fence_work *f = container_of(fence, typeof(*f), dma);70 71 i915_sw_fence_fini(&f->chain);72 73 BUILD_BUG_ON(offsetof(typeof(*f), dma));74 dma_fence_free(&f->dma);75}76 77static const struct dma_fence_ops fence_ops = {78 .get_driver_name = get_driver_name,79 .get_timeline_name = get_timeline_name,80 .release = fence_release,81};82 83void dma_fence_work_init(struct dma_fence_work *f,84 const struct dma_fence_work_ops *ops)85{86 f->ops = ops;87 spin_lock_init(&f->lock);88 dma_fence_init(&f->dma, &fence_ops, &f->lock, 0, 0);89 i915_sw_fence_init(&f->chain, fence_notify);90 INIT_WORK(&f->work, fence_work);91}92 93int dma_fence_work_chain(struct dma_fence_work *f, struct dma_fence *signal)94{95 if (!signal)96 return 0;97 98 return __i915_sw_fence_await_dma_fence(&f->chain, signal, &f->cb);99}100