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      1 /*	$NetBSD: nouveau_nvc0_fence.c,v 1.4 2021/12/18 23:45:32 riastradh Exp $	*/
      2 
      3 /*
      4  * Copyright 2012 Red Hat Inc.
      5  *
      6  * Permission is hereby granted, free of charge, to any person obtaining a
      7  * copy of this software and associated documentation files (the "Software"),
      8  * to deal in the Software without restriction, including without limitation
      9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
     10  * and/or sell copies of the Software, and to permit persons to whom the
     11  * Software is furnished to do so, subject to the following conditions:
     12  *
     13  * The above copyright notice and this permission notice shall be included in
     14  * all copies or substantial portions of the Software.
     15  *
     16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
     19  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
     20  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
     21  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
     22  * OTHER DEALINGS IN THE SOFTWARE.
     23  *
     24  * Authors: Ben Skeggs
     25  */
     26 
     27 #include <sys/cdefs.h>
     28 __KERNEL_RCSID(0, "$NetBSD: nouveau_nvc0_fence.c,v 1.4 2021/12/18 23:45:32 riastradh Exp $");
     29 
     30 #include "nouveau_drv.h"
     31 #include "nouveau_dma.h"
     32 #include "nouveau_fence.h"
     33 
     34 #include "nv50_display.h"
     35 
     36 static int
     37 nvc0_fence_emit32(struct nouveau_channel *chan, u64 virtual, u32 sequence)
     38 {
     39 	int ret = RING_SPACE(chan, 6);
     40 	if (ret == 0) {
     41 		BEGIN_NVC0(chan, 0, NV84_SUBCHAN_SEMAPHORE_ADDRESS_HIGH, 5);
     42 		OUT_RING  (chan, upper_32_bits(virtual));
     43 		OUT_RING  (chan, lower_32_bits(virtual));
     44 		OUT_RING  (chan, sequence);
     45 		OUT_RING  (chan, NV84_SUBCHAN_SEMAPHORE_TRIGGER_WRITE_LONG);
     46 		OUT_RING  (chan, 0x00000000);
     47 		FIRE_RING (chan);
     48 	}
     49 	return ret;
     50 }
     51 
     52 static int
     53 nvc0_fence_sync32(struct nouveau_channel *chan, u64 virtual, u32 sequence)
     54 {
     55 	int ret = RING_SPACE(chan, 5);
     56 	if (ret == 0) {
     57 		BEGIN_NVC0(chan, 0, NV84_SUBCHAN_SEMAPHORE_ADDRESS_HIGH, 4);
     58 		OUT_RING  (chan, upper_32_bits(virtual));
     59 		OUT_RING  (chan, lower_32_bits(virtual));
     60 		OUT_RING  (chan, sequence);
     61 		OUT_RING  (chan, NV84_SUBCHAN_SEMAPHORE_TRIGGER_ACQUIRE_GEQUAL |
     62 				 NVC0_SUBCHAN_SEMAPHORE_TRIGGER_YIELD);
     63 		FIRE_RING (chan);
     64 	}
     65 	return ret;
     66 }
     67 
     68 static int
     69 nvc0_fence_context_new(struct nouveau_channel *chan)
     70 {
     71 	int ret = nv84_fence_context_new(chan);
     72 	if (ret == 0) {
     73 		struct nv84_fence_chan *fctx = chan->fence;
     74 		fctx->base.emit32 = nvc0_fence_emit32;
     75 		fctx->base.sync32 = nvc0_fence_sync32;
     76 	}
     77 	return ret;
     78 }
     79 
     80 int
     81 nvc0_fence_create(struct nouveau_drm *drm)
     82 {
     83 	int ret = nv84_fence_create(drm);
     84 	if (ret == 0) {
     85 		struct nv84_fence_priv *priv = drm->fence;
     86 		priv->base.context_new = nvc0_fence_context_new;
     87 	}
     88 	return ret;
     89 }
     90