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      1 /*	$NetBSD: nouveau_nv50_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_nv50_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 #include "nv50_display.h"
     39 
     40 static int
     41 nv50_fence_context_new(struct nouveau_channel *chan)
     42 {
     43 	struct nv10_fence_priv *priv = chan->drm->fence;
     44 	struct nv10_fence_chan *fctx;
     45 	struct ttm_mem_reg *reg = &priv->bo->bo.mem;
     46 	u32 start = reg->start * PAGE_SIZE;
     47 	u32 limit = start + reg->size - 1;
     48 	int ret;
     49 
     50 	fctx = chan->fence = kzalloc(sizeof(*fctx), GFP_KERNEL);
     51 	if (!fctx)
     52 		return -ENOMEM;
     53 
     54 	nouveau_fence_context_new(chan, &fctx->base);
     55 	fctx->base.emit = nv10_fence_emit;
     56 	fctx->base.read = nv10_fence_read;
     57 	fctx->base.sync = nv17_fence_sync;
     58 
     59 	ret = nvif_object_init(&chan->user, NvSema, NV_DMA_IN_MEMORY,
     60 			       &(struct nv_dma_v0) {
     61 					.target = NV_DMA_V0_TARGET_VRAM,
     62 					.access = NV_DMA_V0_ACCESS_RDWR,
     63 					.start = start,
     64 					.limit = limit,
     65 			       }, sizeof(struct nv_dma_v0),
     66 			       &fctx->sema);
     67 	if (ret)
     68 		nv10_fence_context_del(chan);
     69 	return ret;
     70 }
     71 
     72 int
     73 nv50_fence_create(struct nouveau_drm *drm)
     74 {
     75 	struct nv10_fence_priv *priv;
     76 	int ret = 0;
     77 
     78 	priv = drm->fence = kzalloc(sizeof(*priv), GFP_KERNEL);
     79 	if (!priv)
     80 		return -ENOMEM;
     81 
     82 	priv->base.dtor = nv10_fence_destroy;
     83 	priv->base.resume = nv17_fence_resume;
     84 	priv->base.context_new = nv50_fence_context_new;
     85 	priv->base.context_del = nv10_fence_context_del;
     86 	spin_lock_init(&priv->lock);
     87 
     88 	ret = nouveau_bo_new(&drm->client, 4096, 0x1000, TTM_PL_FLAG_VRAM,
     89 			     0, 0x0000, NULL, NULL, &priv->bo);
     90 	if (!ret) {
     91 		ret = nouveau_bo_pin(priv->bo, TTM_PL_FLAG_VRAM, false);
     92 		if (!ret) {
     93 			ret = nouveau_bo_map(priv->bo);
     94 			if (ret)
     95 				nouveau_bo_unpin(priv->bo);
     96 		}
     97 		if (ret)
     98 			nouveau_bo_ref(NULL, &priv->bo);
     99 	}
    100 
    101 	if (ret) {
    102 		nv10_fence_destroy(drm);
    103 		return ret;
    104 	}
    105 
    106 	nouveau_bo_wr32(priv->bo, 0x000, 0x00000000);
    107 	return ret;
    108 }
    109