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nouveau_nv10_fence.c revision 1.1.1.1.2.2 
      1 /*	$NetBSD: nouveau_nv10_fence.c,v 1.1.1.1.2.2 2014/08/10 06:55:30 tls 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 <bskeggs (at) redhat.com>
     25  */
     26 
     27 #include <sys/cdefs.h>
     28 __KERNEL_RCSID(0, "$NetBSD: nouveau_nv10_fence.c,v 1.1.1.1.2.2 2014/08/10 06:55:30 tls Exp $");
     29 
     30 #include <core/object.h>
     31 #include <core/class.h>
     32 
     33 #include "nouveau_drm.h"
     34 #include "nouveau_dma.h"
     35 #include "nv10_fence.h"
     36 
     37 int
     38 nv10_fence_emit(struct nouveau_fence *fence)
     39 {
     40 	struct nouveau_channel *chan = fence->channel;
     41 	int ret = RING_SPACE(chan, 2);
     42 	if (ret == 0) {
     43 		BEGIN_NV04(chan, 0, NV10_SUBCHAN_REF_CNT, 1);
     44 		OUT_RING  (chan, fence->sequence);
     45 		FIRE_RING (chan);
     46 	}
     47 	return ret;
     48 }
     49 
     50 
     51 static int
     52 nv10_fence_sync(struct nouveau_fence *fence,
     53 		struct nouveau_channel *prev, struct nouveau_channel *chan)
     54 {
     55 	return -ENODEV;
     56 }
     57 
     58 u32
     59 nv10_fence_read(struct nouveau_channel *chan)
     60 {
     61 	return nv_ro32(chan->object, 0x0048);
     62 }
     63 
     64 void
     65 nv10_fence_context_del(struct nouveau_channel *chan)
     66 {
     67 	struct nv10_fence_chan *fctx = chan->fence;
     68 	nouveau_fence_context_del(&fctx->base);
     69 	chan->fence = NULL;
     70 	kfree(fctx);
     71 }
     72 
     73 int
     74 nv10_fence_context_new(struct nouveau_channel *chan)
     75 {
     76 	struct nv10_fence_chan *fctx;
     77 
     78 	fctx = chan->fence = kzalloc(sizeof(*fctx), GFP_KERNEL);
     79 	if (!fctx)
     80 		return -ENOMEM;
     81 
     82 	nouveau_fence_context_new(&fctx->base);
     83 	fctx->base.emit = nv10_fence_emit;
     84 	fctx->base.read = nv10_fence_read;
     85 	fctx->base.sync = nv10_fence_sync;
     86 	return 0;
     87 }
     88 
     89 void
     90 nv10_fence_destroy(struct nouveau_drm *drm)
     91 {
     92 	struct nv10_fence_priv *priv = drm->fence;
     93 	nouveau_bo_unmap(priv->bo);
     94 	if (priv->bo)
     95 		nouveau_bo_unpin(priv->bo);
     96 	nouveau_bo_ref(NULL, &priv->bo);
     97 	drm->fence = NULL;
     98 	kfree(priv);
     99 }
    100 
    101 int
    102 nv10_fence_create(struct nouveau_drm *drm)
    103 {
    104 	struct nv10_fence_priv *priv;
    105 
    106 	priv = drm->fence = kzalloc(sizeof(*priv), GFP_KERNEL);
    107 	if (!priv)
    108 		return -ENOMEM;
    109 
    110 	priv->base.dtor = nv10_fence_destroy;
    111 	priv->base.context_new = nv10_fence_context_new;
    112 	priv->base.context_del = nv10_fence_context_del;
    113 	spin_lock_init(&priv->lock);
    114 	return 0;
    115 }
    116