src/mesa/drivers/dri/i965/intel_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 "imports.h"
  29 #include "intel_batchbuffer.h"
  30 #include "intel_ioctl.h"
  31 #include "bufmgr.h"
  32
  33
  34 static void intel_batchbuffer_reset( struct intel_batchbuffer *batch )
  35 {
  36    assert(batch->map == NULL);
  37
  38    batch->offset = (unsigned long)batch->ptr;
  39    batch->offset = (batch->offset + 63) & ~63;
  40    batch->ptr = (unsigned char *) batch->offset;
  41
  42    if (BATCH_SZ - batch->offset < BATCH_REFILL) {
  43       bmBufferData(batch->intel,
  44                    batch->buffer,
  45                    BATCH_SZ,
  46                    NULL,
  47                    0);
  48       batch->offset = 0;
  49       batch->ptr = NULL;
  50    }
  51
  52    batch->flags = 0;
  53 }
  54
  55 static void intel_batchbuffer_reset_cb( struct intel_context *intel,
  56                                         void *ptr )
  57 {
  58    struct intel_batchbuffer *batch = (struct intel_batchbuffer *)ptr;
  59    assert(batch->map == NULL);
  60    batch->flags = 0;
  61    batch->offset = 0;
  62    batch->ptr = NULL;
  63 }
  64
  65 GLubyte *intel_batchbuffer_map( struct intel_batchbuffer *batch )
  66 {
  67    if (!batch->map) {
  68       batch->map = bmMapBuffer(batch->intel, batch->buffer,
  69                                BM_MEM_AGP|BM_MEM_LOCAL|BM_CLIENT|BM_WRITE);
  70       batch->ptr += (unsigned long)batch->map;
  71    }
  72
  73    return batch->map;
  74 }
  75
  76 void intel_batchbuffer_unmap( struct intel_batchbuffer *batch )
  77 {
  78    if (batch->map) {
  79       batch->ptr -= (unsigned long)batch->map;
  80       batch->map = NULL;
  81       bmUnmapBuffer(batch->intel, batch->buffer);
  82    }
  83 }
  84
  85
  86
  87 /*======================================================================
  88  * Public functions
  89  */
  90 struct intel_batchbuffer *intel_batchbuffer_alloc( struct intel_context *intel )
  91 {
  92    struct intel_batchbuffer *batch = calloc(sizeof(*batch), 1);
  93
  94    batch->intel = intel;
  95
  96    bmGenBuffers(intel, "batch", 1, &batch->buffer, 12);
  97
  98    bmBufferSetInvalidateCB(intel, batch->buffer,
  99                            intel_batchbuffer_reset_cb,
 100                            batch,
 101                            GL_TRUE);
 102
 103    bmBufferData(batch->intel,
 104                 batch->buffer,
 105                 BATCH_SZ,
 106                 NULL,
 107                 0);
 108
 109
 110    return batch;
 111 }
 112
 113 void intel_batchbuffer_free( struct intel_batchbuffer *batch )
 114 {
 115    if (batch->map)
 116       bmUnmapBuffer(batch->intel, batch->buffer);
 117
 118    bmDeleteBuffers(batch->intel, 1, &batch->buffer);
 119    free(batch);
 120 }
 121
 122
 123 #define MI_BATCH_BUFFER_END     (0xA<<23)
 124
 125
 126 GLboolean intel_batchbuffer_flush( struct intel_batchbuffer *batch )
 127 {
 128    struct intel_context *intel = batch->intel;
 129    GLuint used = batch->ptr - (batch->map + batch->offset);
 130    GLuint offset;
 131    GLint retval = GL_TRUE;
 132
 133    assert(intel->locked);
 134
 135    if (used == 0) {
 136       bmReleaseBuffers( batch->intel );
 137       return GL_TRUE;
 138    }
 139
 140    /* Add the MI_BATCH_BUFFER_END.  Always add an MI_FLUSH - this is a
 141     * performance drain that we would like to avoid.
 142     */
 143    if (used & 4) {
 144       ((int *)batch->ptr)[0] = MI_BATCH_BUFFER_END;
 145       batch->ptr += 4;
 146       used += 4;
 147    }
 148    else {
 149       ((int *)batch->ptr)[0] = 0;
 150       ((int *)batch->ptr)[1] = MI_BATCH_BUFFER_END;
 151
 152       batch->ptr += 8;
 153       used += 8;
 154    }
 155
 156    intel_batchbuffer_unmap(batch);
 157
 158    /* Get the batch buffer offset: Must call bmBufferOffset() before
 159     * bmValidateBuffers(), otherwise the buffer won't be on the inuse
 160     * list.
 161     */
 162    offset = bmBufferOffset(batch->intel, batch->buffer);
 163
 164    if (bmValidateBuffers( batch->intel ) != 0) {
 165       assert(intel->locked);
 166       bmReleaseBuffers( batch->intel );
 167       retval = GL_FALSE;
 168       goto out;
 169    }
 170
 171
 172    if (intel->aub_file) {
 173       /* Send buffered commands to aubfile as a single packet.
 174        */
 175       intel_batchbuffer_map(batch);
 176       ((int *)batch->ptr)[-1] = intel->vtbl.flush_cmd();
 177       intel->vtbl.aub_commands(intel,
 178                                offset, /* Fulsim wierdness - don't adjust */
 179                                batch->map + batch->offset,
 180                                used);
 181       ((int *)batch->ptr)[-1] = MI_BATCH_BUFFER_END;
 182       intel_batchbuffer_unmap(batch);
 183    }
 184
 185
 186    /* Fire the batch buffer, which was uploaded above:
 187     */
 188    intel_batch_ioctl(batch->intel,
 189                      offset + batch->offset,
 190                      used);
 191
 192    if (intel->aub_file &&
 193        intel->ctx.DrawBuffer->_ColorDrawBufferMask[0] == BUFFER_BIT_FRONT_LEFT)
 194       intel->vtbl.aub_dump_bmp( intel, 0 );
 195
 196    /* Reset the buffer:
 197     */
 198  out:
 199    intel_batchbuffer_reset( batch );
 200    intel_batchbuffer_map( batch );
 201
 202    if (!retval)
 203       DBG("%s failed\n", __FUNCTION__);
 204
 205    return retval;
 206 }
 207
 208
 209
 210
 211
 212
 213
 214 void intel_batchbuffer_align( struct intel_batchbuffer *batch,
 215                               GLuint align,
 216                               GLuint sz )
 217 {
 218    unsigned long ptr = (unsigned long) batch->ptr;
 219    unsigned long aptr = (ptr + align) & ~((unsigned long)align-1);
 220    GLuint fixup = aptr - ptr;
 221
 222    if (intel_batchbuffer_space(batch) < fixup + sz)
 223       intel_batchbuffer_flush(batch);
 224    else {
 225       memset(batch->ptr, 0, fixup);
 226       batch->ptr += fixup;
 227    }
 228 }
 229
 230
 231
 232
 233 void intel_batchbuffer_data(struct intel_batchbuffer *batch,
 234                             const void *data,
 235                             GLuint bytes,
 236                             GLuint flags)
 237 {
 238    assert((bytes & 3) == 0);
 239    intel_batchbuffer_require_space(batch, bytes, flags);
 240    __memcpy(batch->ptr, data, bytes);
 241    batch->ptr += bytes;
 242 }
 243