IABSD.fr/xenocara/lib/libdrm/nouveau/bufctx.c

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• Author : jsg
  Date : 2018-11-01 08:22:36
  Hash : 38495421
  Message : Import libdrm 2.4.96

• lib/libdrm/nouveau/bufctx.c

• /*
   * Copyright 2012 Red Hat Inc.
   *
   * Permission is hereby granted, free of charge, to any person obtaining a
   * copy of this software and associated documentation files (the "Software"),
   * to deal in the Software without restriction, including without limitation
   * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   * and/or sell copies of the Software, and to permit persons to whom the
   * Software is furnished to do so, subject to the following conditions:
   *
   * The above copyright notice and this permission notice shall be included in
   * all copies or substantial portions of the Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
   * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
   * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
   * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
   * OTHER DEALINGS IN THE SOFTWARE.
   *
   * Authors: Ben Skeggs
   */
  
  #include <stdio.h>
  #include <stdlib.h>
  #include <stdint.h>
  #include <stdbool.h>
  #include <assert.h>
  #include <errno.h>
  
  #include "libdrm_lists.h"
  
  #include "nouveau.h"
  #include "private.h"
  
  struct nouveau_bufref_priv {
  	struct nouveau_bufref base;
  	struct nouveau_bufref_priv *next;
  	struct nouveau_bufctx *bufctx;
  };
  
  struct nouveau_bufbin_priv {
  	struct nouveau_bufref_priv *list;
  	int relocs;
  };
  
  struct nouveau_bufctx_priv {
  	struct nouveau_bufctx base;
  	struct nouveau_bufref_priv *free;
  	int nr_bins;
  	struct nouveau_bufbin_priv bins[];
  };
  
  static inline struct nouveau_bufctx_priv *
  nouveau_bufctx(struct nouveau_bufctx *bctx)
  {
  	return (struct nouveau_bufctx_priv *)bctx;
  }
  
  drm_public int
  nouveau_bufctx_new(struct nouveau_client *client, int bins,
  		   struct nouveau_bufctx **pbctx)
  {
  	struct nouveau_bufctx_priv *priv;
  
  	priv = calloc(1, sizeof(*priv) + sizeof(priv->bins[0]) * bins);
  	if (priv) {
  		DRMINITLISTHEAD(&priv->base.head);
  		DRMINITLISTHEAD(&priv->base.pending);
  		DRMINITLISTHEAD(&priv->base.current);
  		priv->base.client = client;
  		priv->nr_bins = bins;
  		*pbctx = &priv->base;
  		return 0;
  	}
  
  	return -ENOMEM;
  }
  
  drm_public void
  nouveau_bufctx_del(struct nouveau_bufctx **pbctx)
  {
  	struct nouveau_bufctx_priv *pctx = nouveau_bufctx(*pbctx);
  	struct nouveau_bufref_priv *pref;
  	if (pctx) {
  		while (pctx->nr_bins--)
  			nouveau_bufctx_reset(&pctx->base, pctx->nr_bins);
  		while ((pref = pctx->free)) {
  			pctx->free = pref->next;
  			free(pref);
  		}
  		free(pctx);
  		*pbctx = NULL;
  	}
  }
  
  drm_public void
  nouveau_bufctx_reset(struct nouveau_bufctx *bctx, int bin)
  {
  	struct nouveau_bufctx_priv *pctx = nouveau_bufctx(bctx);
  	struct nouveau_bufbin_priv *pbin = &pctx->bins[bin];
  	struct nouveau_bufref_priv *pref;
  
  	while ((pref = pbin->list)) {
  		DRMLISTDELINIT(&pref->base.thead);
  		pbin->list = pref->next;
  		pref->next = pctx->free;
  		pctx->free = pref;
  	}
  
  	bctx->relocs -= pbin->relocs;
  	pbin->relocs  = 0;
  }
  
  drm_public struct nouveau_bufref *
  nouveau_bufctx_refn(struct nouveau_bufctx *bctx, int bin,
  		    struct nouveau_bo *bo, uint32_t flags)
  {
  	struct nouveau_bufctx_priv *pctx = nouveau_bufctx(bctx);
  	struct nouveau_bufbin_priv *pbin = &pctx->bins[bin];
  	struct nouveau_bufref_priv *pref = pctx->free;
  
  	if (!pref)
  		pref = malloc(sizeof(*pref));
  	else
  		pctx->free = pref->next;
  
  	if (pref) {
  		pref->base.bo = bo;
  		pref->base.flags = flags;
  		pref->base.packet = 0;
  
  		DRMLISTADDTAIL(&pref->base.thead, &bctx->pending);
  		pref->bufctx = bctx;
  		pref->next = pbin->list;
  		pbin->list = pref;
  	}
  
  	return &pref->base;
  }
  
  drm_public struct nouveau_bufref *
  nouveau_bufctx_mthd(struct nouveau_bufctx *bctx, int bin, uint32_t packet,
  		    struct nouveau_bo *bo, uint64_t data, uint32_t flags,
  		    uint32_t vor, uint32_t tor)
  {
  	struct nouveau_bufctx_priv *pctx = nouveau_bufctx(bctx);
  	struct nouveau_bufbin_priv *pbin = &pctx->bins[bin];
  	struct nouveau_bufref *bref = nouveau_bufctx_refn(bctx, bin, bo, flags);
  	if (bref) {
  		bref->packet = packet;
  		bref->data = data;
  		bref->vor = vor;
  		bref->tor = tor;
  		pbin->relocs++;
  		bctx->relocs++;
  	}
  	return bref;
  }