src/gallium/drivers/i965/brw_batchbuffer.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2006 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 #include "util/u_memory.h"
  29
  30 #include "brw_batchbuffer.h"
  31 #include "brw_reg.h"
  32 #include "brw_winsys.h"
  33 #include "brw_debug.h"
  34 #include "brw_structs.h"
  35
  36 #define ALWAYS_EMIT_MI_FLUSH 1
  37
  38 enum pipe_error
  39 brw_batchbuffer_reset(struct brw_batchbuffer *batch)
  40 {
  41    enum pipe_error ret;
  42
  43    ret = batch->sws->bo_alloc( batch->sws,
  44                                BRW_BUFFER_TYPE_BATCH,
  45                                BRW_BATCH_SIZE, 4096,
  46                                &batch->buf );
  47    if (ret)
  48       return ret;
  49
  50    batch->size = BRW_BATCH_SIZE;
  51
  52    /* With map_range semantics, the winsys can decide whether to
  53     * inject a malloc'ed bounce buffer instead of mapping directly.
  54     */
  55    batch->map = batch->sws->bo_map(batch->buf,
  56                                    BRW_DATA_BATCH_BUFFER,
  57                                    0, batch->size,
  58                                    GL_TRUE,
  59                                    GL_TRUE,
  60                                    GL_TRUE);
  61
  62    batch->ptr = batch->map;
  63    return PIPE_OK;
  64 }
  65
  66 struct brw_batchbuffer *
  67 brw_batchbuffer_alloc(struct brw_winsys_screen *sws,
  68                       struct brw_chipset chipset)
  69 {
  70    struct brw_batchbuffer *batch = CALLOC_STRUCT(brw_batchbuffer);
  71
  72    batch->sws = sws;
  73    batch->chipset = chipset;
  74    brw_batchbuffer_reset(batch);
  75
  76    return batch;
  77 }
  78
  79 void
  80 brw_batchbuffer_free(struct brw_batchbuffer *batch)
  81 {
  82    if (batch->map) {
  83       batch->sws->bo_unmap(batch->buf);
  84       batch->map = NULL;
  85    }
  86
  87    bo_reference(&batch->buf, NULL);
  88    FREE(batch);
  89 }
  90
  91
  92 void
  93 _brw_batchbuffer_flush(struct brw_batchbuffer *batch,
  94                        const char *file,
  95                        int line)
  96 {
  97    GLuint used = batch->ptr - batch->map;
  98
  99    if (used == 0)
 100       return;
 101
 102    /* Post-swap throttling done by the state tracker.
 103     */
 104
 105    if (BRW_DEBUG & DEBUG_BATCH)
 106       debug_printf("%s:%d: Batchbuffer flush with %db used\n",
 107                    file, line, used);
 108
 109    if (ALWAYS_EMIT_MI_FLUSH) {
 110       *(GLuint *) (batch->ptr) = MI_FLUSH | BRW_FLUSH_STATE_CACHE;
 111       batch->ptr += 4;
 112       used = batch->ptr - batch->map;
 113    }
 114
 115    /* Round batchbuffer usage to 2 DWORDs.
 116     */
 117    if ((used & 4) == 0) {
 118       *(GLuint *) (batch->ptr) = 0; /* noop */
 119       batch->ptr += 4;
 120       used = batch->ptr - batch->map;
 121    }
 122
 123    /* Mark the end of the buffer.
 124     */
 125    *(GLuint *) (batch->ptr) = MI_BATCH_BUFFER_END;
 126    batch->ptr += 4;
 127    used = batch->ptr - batch->map;
 128
 129    batch->sws->bo_flush_range(batch->buf, 0, used);
 130    batch->sws->bo_unmap(batch->buf);
 131    batch->map = NULL;
 132    batch->ptr = NULL;
 133
 134    batch->sws->bo_exec(batch->buf, used );
 135
 136    if (BRW_DEBUG & DEBUG_SYNC) {
 137       /* Abuse map/unmap to achieve wait-for-fence.
 138        *
 139        * XXX: hide this inside the winsys and export a fence
 140        * interface.
 141        */
 142       debug_printf("waiting for idle\n");
 143       batch->sws->bo_wait_idle(batch->buf);
 144    }
 145
 146    /* Reset the buffer:
 147     */
 148    brw_batchbuffer_reset(batch);
 149 }
 150
 151
 152 /* The OUT_RELOC() macro ends up here, generating a relocation within
 153  * the batch buffer.
 154  */
 155 enum pipe_error
 156 brw_batchbuffer_emit_reloc(struct brw_batchbuffer *batch,
 157                            struct brw_winsys_buffer *buffer,
 158                            enum brw_buffer_usage usage,
 159                            uint32_t delta)
 160 {
 161    int ret;
 162
 163    if (batch->ptr - batch->map > batch->buf->size) {
 164       debug_printf("bad relocation ptr %p map %p offset %d size %d\n",
 165                    batch->ptr, batch->map, batch->ptr - batch->map, batch->buf->size);
 166
 167       return PIPE_ERROR_OUT_OF_MEMORY;
 168    }
 169
 170    ret = batch->sws->bo_emit_reloc(batch->buf,
 171                                    usage,
 172                                    delta,
 173                                    batch->ptr - batch->map,
 174                                    buffer);
 175    if (ret != 0)
 176       return ret;
 177
 178    /* bo_emit_reloc was resposible for writing a zero into the
 179     * batchbuffer if necessary.  Just need to update our pointer.
 180     */
 181    batch->ptr += 4;
 182
 183    return 0;
 184 }
 185
 186 enum pipe_error
 187 brw_batchbuffer_data(struct brw_batchbuffer *batch,
 188                        const void *data, GLuint bytes,
 189                        enum cliprect_mode cliprect_mode)
 190 {
 191    enum pipe_error ret;
 192
 193    assert((bytes & 3) == 0);
 194
 195    ret = brw_batchbuffer_require_space(batch, bytes);
 196    if (ret)
 197       return ret;
 198
 199    memcpy(batch->ptr, data, bytes);
 200    batch->ptr += bytes;
 201    return 0;
 202 }