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1 : : // SPDX-License-Identifier: GPL-2.0-only 2 : : /* 3 : : * seqno-fence, using a dma-buf to synchronize fencing 4 : : * 5 : : * Copyright (C) 2012 Texas Instruments 6 : : * Copyright (C) 2012-2014 Canonical Ltd 7 : : * Authors: 8 : : * Rob Clark <robdclark@gmail.com> 9 : : * Maarten Lankhorst <maarten.lankhorst@canonical.com> 10 : : */ 11 : : 12 : : #include <linux/slab.h> 13 : : #include <linux/export.h> 14 : : #include <linux/seqno-fence.h> 15 : : 16 : 0 : static const char *seqno_fence_get_driver_name(struct dma_fence *fence) 17 : : { 18 [ # # ]: 0 : struct seqno_fence *seqno_fence = to_seqno_fence(fence); 19 : : 20 : 0 : return seqno_fence->ops->get_driver_name(fence); 21 : : } 22 : : 23 : 0 : static const char *seqno_fence_get_timeline_name(struct dma_fence *fence) 24 : : { 25 [ # # ]: 0 : struct seqno_fence *seqno_fence = to_seqno_fence(fence); 26 : : 27 : 0 : return seqno_fence->ops->get_timeline_name(fence); 28 : : } 29 : : 30 : 0 : static bool seqno_enable_signaling(struct dma_fence *fence) 31 : : { 32 [ # # ]: 0 : struct seqno_fence *seqno_fence = to_seqno_fence(fence); 33 : : 34 : 0 : return seqno_fence->ops->enable_signaling(fence); 35 : : } 36 : : 37 : 0 : static bool seqno_signaled(struct dma_fence *fence) 38 : : { 39 [ # # ]: 0 : struct seqno_fence *seqno_fence = to_seqno_fence(fence); 40 : : 41 [ # # # # ]: 0 : return seqno_fence->ops->signaled && seqno_fence->ops->signaled(fence); 42 : : } 43 : : 44 : 0 : static void seqno_release(struct dma_fence *fence) 45 : : { 46 [ # # ]: 0 : struct seqno_fence *f = to_seqno_fence(fence); 47 : : 48 : 0 : dma_buf_put(f->sync_buf); 49 [ # # ]: 0 : if (f->ops->release) 50 : 0 : f->ops->release(fence); 51 : : else 52 : 0 : dma_fence_free(&f->base); 53 : 0 : } 54 : : 55 : 0 : static signed long seqno_wait(struct dma_fence *fence, bool intr, 56 : : signed long timeout) 57 : : { 58 [ # # ]: 0 : struct seqno_fence *f = to_seqno_fence(fence); 59 : : 60 : 0 : return f->ops->wait(fence, intr, timeout); 61 : : } 62 : : 63 : : const struct dma_fence_ops seqno_fence_ops = { 64 : : .get_driver_name = seqno_fence_get_driver_name, 65 : : .get_timeline_name = seqno_fence_get_timeline_name, 66 : : .enable_signaling = seqno_enable_signaling, 67 : : .signaled = seqno_signaled, 68 : : .wait = seqno_wait, 69 : : .release = seqno_release, 70 : : }; 71 : : EXPORT_SYMBOL(seqno_fence_ops);