Home | History | Annotate | Line # | Download | only in nouveau 
      1 /*	$NetBSD: nouveau_nv17_fence.c,v 1.3 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 <bskeggs (at) redhat.com>
     25  */
     26 
     27 #include <sys/cdefs.h>
     28 __KERNEL_RCSID(0, "$NetBSD: nouveau_nv17_fence.c,v 1.3 2021/12/18 23:45:32 riastradh Exp $");
     29 
     30 #include <nvif/os.h>
     31 #include <nvif/class.h>
     32 #include <nvif/cl0002.h>
     33 
     34 #include "nouveau_drv.h"
     35 #include "nouveau_dma.h"
     36 #include "nv10_fence.h"
     37 
     38 int
     39 nv17_fence_sync(struct nouveau_fence *fence,
     40 		struct nouveau_channel *prev, struct nouveau_channel *chan)
     41 {
     42 	struct nouveau_cli *cli = (void *)prev->user.client;
     43 	struct nv10_fence_priv *priv = chan->drm->fence;
     44 	struct nv10_fence_chan *fctx = chan->fence;
     45 	u32 value;
     46 	int ret;
     47 
     48 	if (!mutex_trylock(&cli->mutex))
     49 		return -EBUSY;
     50 
     51 	spin_lock(&priv->lock);
     52 	value = priv->sequence;
     53 	priv->sequence += 2;
     54 	spin_unlock(&priv->lock);
     55 
     56 	ret = RING_SPACE(prev, 5);
     57 	if (!ret) {
     58 		BEGIN_NV04(prev, 0, NV11_SUBCHAN_DMA_SEMAPHORE, 4);
     59 		OUT_RING  (prev, fctx->sema.handle);
     60 		OUT_RING  (prev, 0);
     61 		OUT_RING  (prev, value + 0);
     62 		OUT_RING  (prev, value + 1);
     63 		FIRE_RING (prev);
     64 	}
     65 
     66 	if (!ret && !(ret = RING_SPACE(chan, 5))) {
     67 		BEGIN_NV04(chan, 0, NV11_SUBCHAN_DMA_SEMAPHORE, 4);
     68 		OUT_RING  (chan, fctx->sema.handle);
     69 		OUT_RING  (chan, 0);
     70 		OUT_RING  (chan, value + 1);
     71 		OUT_RING  (chan, value + 2);
     72 		FIRE_RING (chan);
     73 	}
     74 
     75 	mutex_unlock(&cli->mutex);
     76 	return 0;
     77 }
     78 
     79 static int
     80 nv17_fence_context_new(struct nouveau_channel *chan)
     81 {
     82 	struct nv10_fence_priv *priv = chan->drm->fence;
     83 	struct nv10_fence_chan *fctx;
     84 	struct ttm_mem_reg *reg = &priv->bo->bo.mem;
     85 	u32 start = reg->start * PAGE_SIZE;
     86 	u32 limit = start + reg->size - 1;
     87 	int ret = 0;
     88 
     89 	fctx = chan->fence = kzalloc(sizeof(*fctx), GFP_KERNEL);
     90 	if (!fctx)
     91 		return -ENOMEM;
     92 
     93 	nouveau_fence_context_new(chan, &fctx->base);
     94 	fctx->base.emit = nv10_fence_emit;
     95 	fctx->base.read = nv10_fence_read;
     96 	fctx->base.sync = nv17_fence_sync;
     97 
     98 	ret = nvif_object_init(&chan->user, NvSema, NV_DMA_FROM_MEMORY,
     99 			       &(struct nv_dma_v0) {
    100 					.target = NV_DMA_V0_TARGET_VRAM,
    101 					.access = NV_DMA_V0_ACCESS_RDWR,
    102 					.start = start,
    103 					.limit = limit,
    104 			       }, sizeof(struct nv_dma_v0),
    105 			       &fctx->sema);
    106 	if (ret)
    107 		nv10_fence_context_del(chan);
    108 	return ret;
    109 }
    110 
    111 void
    112 nv17_fence_resume(struct nouveau_drm *drm)
    113 {
    114 	struct nv10_fence_priv *priv = drm->fence;
    115 
    116 	nouveau_bo_wr32(priv->bo, 0, priv->sequence);
    117 }
    118 
    119 int
    120 nv17_fence_create(struct nouveau_drm *drm)
    121 {
    122 	struct nv10_fence_priv *priv;
    123 	int ret = 0;
    124 
    125 	priv = drm->fence = kzalloc(sizeof(*priv), GFP_KERNEL);
    126 	if (!priv)
    127 		return -ENOMEM;
    128 
    129 	priv->base.dtor = nv10_fence_destroy;
    130 	priv->base.resume = nv17_fence_resume;
    131 	priv->base.context_new = nv17_fence_context_new;
    132 	priv->base.context_del = nv10_fence_context_del;
    133 	spin_lock_init(&priv->lock);
    134 
    135 	ret = nouveau_bo_new(&drm->client, 4096, 0x1000, TTM_PL_FLAG_VRAM,
    136 			     0, 0x0000, NULL, NULL, &priv->bo);
    137 	if (!ret) {
    138 		ret = nouveau_bo_pin(priv->bo, TTM_PL_FLAG_VRAM, false);
    139 		if (!ret) {
    140 			ret = nouveau_bo_map(priv->bo);
    141 			if (ret)
    142 				nouveau_bo_unpin(priv->bo);
    143 		}
    144 		if (ret)
    145 			nouveau_bo_ref(NULL, &priv->bo);
    146 	}
    147 
    148 	if (ret) {
    149 		nv10_fence_destroy(drm);
    150 		return ret;
    151 	}
    152 
    153 	nouveau_bo_wr32(priv->bo, 0x000, 0x00000000);
    154 	return ret;
    155 }
    156