Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  * seqno-fence, using a dma-buf to synchronize fencing
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  * Copyright (C) 2012 Texas Instruments
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6)  * Copyright (C) 2012-2014 Canonical Ltd
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7)  * Authors:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8)  *   Rob Clark <robdclark@gmail.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9)  *   Maarten Lankhorst <maarten.lankhorst@canonical.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/export.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/seqno-fence.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) static const char *seqno_fence_get_driver_name(struct dma_fence *fence)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 	struct seqno_fence *seqno_fence = to_seqno_fence(fence);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 	return seqno_fence->ops->get_driver_name(fence);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) static const char *seqno_fence_get_timeline_name(struct dma_fence *fence)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 	struct seqno_fence *seqno_fence = to_seqno_fence(fence);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 	return seqno_fence->ops->get_timeline_name(fence);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) static bool seqno_enable_signaling(struct dma_fence *fence)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 	struct seqno_fence *seqno_fence = to_seqno_fence(fence);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 	return seqno_fence->ops->enable_signaling(fence);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) static bool seqno_signaled(struct dma_fence *fence)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 	struct seqno_fence *seqno_fence = to_seqno_fence(fence);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 	return seqno_fence->ops->signaled && seqno_fence->ops->signaled(fence);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) static void seqno_release(struct dma_fence *fence)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 	struct seqno_fence *f = to_seqno_fence(fence);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 	dma_buf_put(f->sync_buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 	if (f->ops->release)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 		f->ops->release(fence);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 		dma_fence_free(&f->base);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) static signed long seqno_wait(struct dma_fence *fence, bool intr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) 			      signed long timeout)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) 	struct seqno_fence *f = to_seqno_fence(fence);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) 	return f->ops->wait(fence, intr, timeout);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) const struct dma_fence_ops seqno_fence_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) 	.get_driver_name = seqno_fence_get_driver_name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) 	.get_timeline_name = seqno_fence_get_timeline_name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) 	.enable_signaling = seqno_enable_signaling,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) 	.signaled = seqno_signaled,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) 	.wait = seqno_wait,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) 	.release = seqno_release,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) EXPORT_SYMBOL(seqno_fence_ops);