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      1 /**************************************************************************
      2  *
      3  * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
      4  * All Rights Reserved.
      5  *
      6  * Permission is hereby granted, free of charge, to any person obtaining a
      7  * copy of this software and associated documentation files (the
      8  * "Software"), to deal in the Software without restriction, including
      9  * without limitation the rights to use, copy, modify, merge, publish,
     10  * distribute, sub license, and/or sell copies of the Software, and to
     11  * permit persons to whom the Software is furnished to do so, subject to
     12  * the following conditions:
     13  *
     14  * The above copyright notice and this permission notice (including the
     15  * next paragraph) shall be included in all copies or substantial portions
     16  * of the Software.
     17  *
     18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
     19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
     20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
     21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
     22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
     23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
     24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
     25  *
     26  **************************************************************************/
     27 
     28 /**
     29  * @file
     30  * Buffer validation.
     31  *
     32  * @author Jose Fonseca <jrfonseca (at) tungstengraphics.com>
     33  */
     34 
     35 
     36 #include "pipe/p_compiler.h"
     37 #include "pipe/p_defines.h"
     38 #include "util/u_memory.h"
     39 #include "util/u_debug.h"
     40 
     41 #include "pb_buffer.h"
     42 #include "pb_validate.h"
     43 
     44 
     45 #define PB_VALIDATE_INITIAL_SIZE 1 /* 512 */
     46 
     47 
     48 struct pb_validate_entry
     49 {
     50    struct pb_buffer *buf;
     51    unsigned flags;
     52 };
     53 
     54 
     55 struct pb_validate
     56 {
     57    struct pb_validate_entry *entries;
     58    unsigned used;
     59    unsigned size;
     60 };
     61 
     62 
     63 enum pipe_error
     64 pb_validate_add_buffer(struct pb_validate *vl,
     65                        struct pb_buffer *buf,
     66                        unsigned flags)
     67 {
     68    assert(buf);
     69    if(!buf)
     70       return PIPE_ERROR;
     71 
     72    assert(flags & PB_USAGE_GPU_READ_WRITE);
     73    assert(!(flags & ~PB_USAGE_GPU_READ_WRITE));
     74    flags &= PB_USAGE_GPU_READ_WRITE;
     75 
     76    /* We only need to store one reference for each buffer, so avoid storing
     77     * consecutive references for the same buffer. It might not be the most
     78     * common pattern, but it is easy to implement.
     79     */
     80    if(vl->used && vl->entries[vl->used - 1].buf == buf) {
     81       vl->entries[vl->used - 1].flags |= flags;
     82       return PIPE_OK;
     83    }
     84 
     85    /* Grow the table */
     86    if(vl->used == vl->size) {
     87       unsigned new_size;
     88       struct pb_validate_entry *new_entries;
     89 
     90       new_size = vl->size * 2;
     91       if(!new_size)
     92 	 return PIPE_ERROR_OUT_OF_MEMORY;
     93 
     94       new_entries = (struct pb_validate_entry *)REALLOC(vl->entries,
     95                                                         vl->size*sizeof(struct pb_validate_entry),
     96                                                         new_size*sizeof(struct pb_validate_entry));
     97       if(!new_entries)
     98          return PIPE_ERROR_OUT_OF_MEMORY;
     99 
    100       memset(new_entries + vl->size, 0, (new_size - vl->size)*sizeof(struct pb_validate_entry));
    101 
    102       vl->size = new_size;
    103       vl->entries = new_entries;
    104    }
    105 
    106    assert(!vl->entries[vl->used].buf);
    107    pb_reference(&vl->entries[vl->used].buf, buf);
    108    vl->entries[vl->used].flags = flags;
    109    ++vl->used;
    110 
    111    return PIPE_OK;
    112 }
    113 
    114 
    115 enum pipe_error
    116 pb_validate_foreach(struct pb_validate *vl,
    117                     enum pipe_error (*callback)(struct pb_buffer *buf, void *data),
    118                     void *data)
    119 {
    120    unsigned i;
    121    for(i = 0; i < vl->used; ++i) {
    122       enum pipe_error ret;
    123       ret = callback(vl->entries[i].buf, data);
    124       if(ret != PIPE_OK)
    125          return ret;
    126    }
    127    return PIPE_OK;
    128 }
    129 
    130 
    131 enum pipe_error
    132 pb_validate_validate(struct pb_validate *vl)
    133 {
    134    unsigned i;
    135 
    136    for(i = 0; i < vl->used; ++i) {
    137       enum pipe_error ret;
    138       ret = pb_validate(vl->entries[i].buf, vl, vl->entries[i].flags);
    139       if(ret != PIPE_OK) {
    140          while(i--)
    141             pb_validate(vl->entries[i].buf, NULL, 0);
    142          return ret;
    143       }
    144    }
    145 
    146    return PIPE_OK;
    147 }
    148 
    149 
    150 void
    151 pb_validate_fence(struct pb_validate *vl,
    152                   struct pipe_fence_handle *fence)
    153 {
    154    unsigned i;
    155    for(i = 0; i < vl->used; ++i) {
    156       pb_fence(vl->entries[i].buf, fence);
    157       pb_reference(&vl->entries[i].buf, NULL);
    158    }
    159    vl->used = 0;
    160 }
    161 
    162 
    163 void
    164 pb_validate_destroy(struct pb_validate *vl)
    165 {
    166    unsigned i;
    167    for(i = 0; i < vl->used; ++i)
    168       pb_reference(&vl->entries[i].buf, NULL);
    169    FREE(vl->entries);
    170    FREE(vl);
    171 }
    172 
    173 
    174 struct pb_validate *
    175 pb_validate_create()
    176 {
    177    struct pb_validate *vl;
    178 
    179    vl = CALLOC_STRUCT(pb_validate);
    180    if(!vl)
    181       return NULL;
    182 
    183    vl->size = PB_VALIDATE_INITIAL_SIZE;
    184    vl->entries = (struct pb_validate_entry *)CALLOC(vl->size, sizeof(struct pb_validate_entry));
    185    if(!vl->entries) {
    186       FREE(vl);
    187       return NULL;
    188    }
    189 
    190    return vl;
    191 }
    192 
    193