| Maarten Lankhorst | 606b23a | 2014-07-01 12:57:20 +0200 | [diff] [blame] | 1 | /* |
| 2 | * seqno-fence, using a dma-buf to synchronize fencing |
| 3 | * |
| 4 | * Copyright (C) 2012 Texas Instruments |
| 5 | * Copyright (C) 2012-2014 Canonical Ltd |
| 6 | * Authors: |
| 7 | * Rob Clark <robdclark@gmail.com> |
| 8 | * Maarten Lankhorst <maarten.lankhorst@canonical.com> |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify it |
| 11 | * under the terms of the GNU General Public License version 2 as published by |
| 12 | * the Free Software Foundation. |
| 13 | * |
| 14 | * This program is distributed in the hope that it will be useful, but WITHOUT |
| 15 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 16 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| 17 | * more details. |
| 18 | */ |
| 19 | |
| 20 | #include <linux/slab.h> |
| 21 | #include <linux/export.h> |
| 22 | #include <linux/seqno-fence.h> |
| 23 | |
| 24 | static const char *seqno_fence_get_driver_name(struct fence *fence) |
| 25 | { |
| 26 | struct seqno_fence *seqno_fence = to_seqno_fence(fence); |
| 27 | return seqno_fence->ops->get_driver_name(fence); |
| 28 | } |
| 29 | |
| 30 | static const char *seqno_fence_get_timeline_name(struct fence *fence) |
| 31 | { |
| 32 | struct seqno_fence *seqno_fence = to_seqno_fence(fence); |
| 33 | return seqno_fence->ops->get_timeline_name(fence); |
| 34 | } |
| 35 | |
| 36 | static bool seqno_enable_signaling(struct fence *fence) |
| 37 | { |
| 38 | struct seqno_fence *seqno_fence = to_seqno_fence(fence); |
| 39 | return seqno_fence->ops->enable_signaling(fence); |
| 40 | } |
| 41 | |
| 42 | static bool seqno_signaled(struct fence *fence) |
| 43 | { |
| 44 | struct seqno_fence *seqno_fence = to_seqno_fence(fence); |
| 45 | return seqno_fence->ops->signaled && seqno_fence->ops->signaled(fence); |
| 46 | } |
| 47 | |
| 48 | static void seqno_release(struct fence *fence) |
| 49 | { |
| 50 | struct seqno_fence *f = to_seqno_fence(fence); |
| 51 | |
| 52 | dma_buf_put(f->sync_buf); |
| 53 | if (f->ops->release) |
| 54 | f->ops->release(fence); |
| 55 | else |
| 56 | fence_free(&f->base); |
| 57 | } |
| 58 | |
| 59 | static signed long seqno_wait(struct fence *fence, bool intr, signed long timeout) |
| 60 | { |
| 61 | struct seqno_fence *f = to_seqno_fence(fence); |
| 62 | return f->ops->wait(fence, intr, timeout); |
| 63 | } |
| 64 | |
| 65 | const struct fence_ops seqno_fence_ops = { |
| 66 | .get_driver_name = seqno_fence_get_driver_name, |
| 67 | .get_timeline_name = seqno_fence_get_timeline_name, |
| 68 | .enable_signaling = seqno_enable_signaling, |
| 69 | .signaled = seqno_signaled, |
| 70 | .wait = seqno_wait, |
| 71 | .release = seqno_release, |
| 72 | }; |
| 73 | EXPORT_SYMBOL(seqno_fence_ops); |