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 void 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    assert(batch->map);
  73 }
  74
  75 void intel_batchbuffer_unmap( struct intel_batchbuffer *batch )
  76 {
  77    if (batch->map) {
  78       batch->ptr -= (unsigned long)batch->map;
  79       batch->map = NULL;
  80       bmUnmapBuffer(batch->intel, batch->buffer);
  81    }
  82 }
  83
  84
  85
  86 /*======================================================================
  87  * Public functions
  88  */
  89 struct intel_batchbuffer *intel_batchbuffer_alloc( struct intel_context *intel )
  90 {
  91    struct intel_batchbuffer *batch = calloc(sizeof(*batch), 1);
  92
  93    batch->intel = intel;
  94
  95    bmGenBuffers(intel, "batch", 1, &batch->buffer);
  96
  97    bmBufferSetInvalidateCB(intel, batch->buffer,
  98                            intel_batchbuffer_reset_cb,
  99                            batch,
 100                            GL_TRUE);
 101
 102    bmBufferData(batch->intel,
 103                 batch->buffer,
 104                 BATCH_SZ,
 105                 NULL,
 106                 0);
 107
 108
 109    return batch;
 110 }
 111
 112 void intel_batchbuffer_free( struct intel_batchbuffer *batch )
 113 {
 114    if (batch->map)
 115       bmUnmapBuffer(batch->intel, batch->buffer);
 116
 117    bmDeleteBuffers(batch->intel, 1, &batch->buffer);
 118    free(batch);
 119 }
 120
 121
 122 #define MI_BATCH_BUFFER_END     (0xA<<23)
 123
 124
 125 void intel_batchbuffer_flush( struct intel_batchbuffer *batch )
 126 {
 127    struct intel_context *intel = batch->intel;
 128    GLuint used = batch->ptr - (batch->map + batch->offset);
 129    GLuint offset;
 130    GLboolean ignore_cliprects = (batch->flags & INTEL_BATCH_CLIPRECTS) ? GL_FALSE : GL_TRUE;
 131
 132    assert(intel->locked);
 133
 134    if (used == 0) {
 135       bmReleaseBuffers( batch->intel );
 136       return;
 137    }
 138
 139    /* Throw away non-effective packets.
 140     */
 141    if (intel->numClipRects == 0 && !ignore_cliprects) {
 142       batch->ptr = batch->map + batch->offset;
 143       bmReleaseBuffers( batch->intel );
 144       intel->vtbl.lost_hardware(intel);
 145       batch->flags = 0;
 146
 147       UNLOCK_HARDWARE(intel);
 148       sched_yield();
 149       LOCK_HARDWARE(intel);
 150
 151       return;
 152    }
 153
 154
 155    /* Add the MI_BATCH_BUFFER_END.  Always add an MI_FLUSH - this is a
 156     * performance drain that we would like to avoid.
 157     */
 158    if (used & 4) {
 159       ((int *)batch->ptr)[0] = MI_BATCH_BUFFER_END;
 160       batch->ptr += 4;
 161       used += 4;
 162    }
 163    else {
 164       ((int *)batch->ptr)[0] = 0;
 165       ((int *)batch->ptr)[1] = MI_BATCH_BUFFER_END;
 166
 167       batch->ptr += 8;
 168       used += 8;
 169    }
 170
 171    intel_batchbuffer_unmap(batch);
 172
 173    /* Get the batch buffer offset: Must call bmBufferOffset() before
 174     * bmValidateBuffers(), otherwise the buffer won't be on the inuse
 175     * list.
 176     */
 177    offset = bmBufferOffset(batch->intel, batch->buffer);
 178
 179    if (!bmValidateBuffers( batch->intel )) {
 180       assert(0);
 181    }
 182
 183
 184    if (intel->aub_file) {
 185       /* Send buffered commands to aubfile as a single packet.
 186        */
 187       intel_batchbuffer_map(batch);
 188       ((int *)batch->ptr)[-1] = intel->vtbl.flush_cmd();
 189       intel->vtbl.aub_commands(intel,
 190                                offset, /* Fulsim wierdness - don't adjust */
 191                                batch->map + batch->offset,
 192                                used);
 193       ((int *)batch->ptr)[-1] = MI_BATCH_BUFFER_END;
 194       intel_batchbuffer_unmap(batch);
 195    }
 196
 197
 198    /* Fire the batch buffer, which was uploaded above:
 199     */
 200    intel_batch_ioctl(batch->intel,
 201                      offset + batch->offset,
 202                      used,
 203                      ignore_cliprects);
 204
 205    if (intel->aub_file &&
 206        intel->ctx.DrawBuffer->_ColorDrawBufferMask[0] == BUFFER_BIT_FRONT_LEFT)
 207       intel->vtbl.aub_dump_bmp( intel, 0 );
 208
 209    /* Reset the buffer:
 210     */
 211    intel_batchbuffer_reset( batch );
 212    intel_batchbuffer_map( batch );
 213 }
 214
 215
 216
 217
 218
 219
 220
 221 void intel_batchbuffer_align( struct intel_batchbuffer *batch,
 222                               GLuint align,
 223                               GLuint sz )
 224 {
 225    unsigned long ptr = (unsigned long) batch->ptr;
 226    unsigned long aptr = (ptr + align) & ~((unsigned long)align-1);
 227    GLuint fixup = aptr - ptr;
 228
 229    if (intel_batchbuffer_space(batch) < fixup + sz)
 230       intel_batchbuffer_flush(batch);
 231    else {
 232       memset(batch->ptr, 0, fixup);
 233       batch->ptr += fixup;
 234    }
 235 }
 236
 237
 238
 239
 240 void intel_batchbuffer_data(struct intel_batchbuffer *batch,
 241                             const void *data,
 242                             GLuint bytes,
 243                             GLuint flags)
 244 {
 245    assert((bytes & 3) == 0);
 246    intel_batchbuffer_require_space(batch, bytes, flags);
 247    __memcpy(batch->ptr, data, bytes);
 248    batch->ptr += bytes;
 249 }
 250