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 "intel_decode.h"
  32 #include "bufmgr.h"
  33
  34
  35 static void intel_batchbuffer_reset( struct intel_batchbuffer *batch )
  36 {
  37    assert(batch->map == NULL);
  38
  39    batch->offset = (unsigned long)batch->ptr;
  40    batch->offset = (batch->offset + 63) & ~63;
  41    batch->ptr = (unsigned char *) batch->offset;
  42
  43    if (BATCH_SZ - batch->offset < BATCH_REFILL) {
  44       bmBufferData(batch->intel,
  45                    batch->buffer,
  46                    BATCH_SZ,
  47                    NULL,
  48                    0);
  49       batch->offset = 0;
  50       batch->ptr = NULL;
  51    }
  52
  53    batch->flags = 0;
  54 }
  55
  56 static void intel_batchbuffer_reset_cb( struct intel_context *intel,
  57                                         void *ptr )
  58 {
  59    struct intel_batchbuffer *batch = (struct intel_batchbuffer *)ptr;
  60    assert(batch->map == NULL);
  61    batch->flags = 0;
  62    batch->offset = 0;
  63    batch->ptr = NULL;
  64 }
  65
  66 GLubyte *intel_batchbuffer_map( struct intel_batchbuffer *batch )
  67 {
  68    if (!batch->map) {
  69       batch->map = bmMapBuffer(batch->intel, batch->buffer,
  70                                BM_MEM_AGP|BM_MEM_LOCAL|BM_CLIENT|BM_WRITE);
  71       batch->ptr += (unsigned long)batch->map;
  72    }
  73
  74    return batch->map;
  75 }
  76
  77 void intel_batchbuffer_unmap( struct intel_batchbuffer *batch )
  78 {
  79    if (batch->map) {
  80       batch->ptr -= (unsigned long)batch->map;
  81       batch->map = NULL;
  82       bmUnmapBuffer(batch->intel, batch->buffer);
  83    }
  84 }
  85
  86
  87
  88 /*======================================================================
  89  * Public functions
  90  */
  91 struct intel_batchbuffer *intel_batchbuffer_alloc( struct intel_context *intel )
  92 {
  93    struct intel_batchbuffer *batch = calloc(sizeof(*batch), 1);
  94
  95    batch->intel = intel;
  96
  97    bmGenBuffers(intel, "batch", 1, &batch->buffer, 12);
  98
  99    bmBufferSetInvalidateCB(intel, batch->buffer,
 100                            intel_batchbuffer_reset_cb,
 101                            batch,
 102                            GL_TRUE);
 103
 104    bmBufferData(batch->intel,
 105                 batch->buffer,
 106                 BATCH_SZ,
 107                 NULL,
 108                 0);
 109
 110
 111    return batch;
 112 }
 113
 114 void intel_batchbuffer_free( struct intel_batchbuffer *batch )
 115 {
 116    if (batch->map)
 117       bmUnmapBuffer(batch->intel, batch->buffer);
 118
 119    bmDeleteBuffers(batch->intel, 1, &batch->buffer);
 120    free(batch);
 121 }
 122
 123
 124 #define MI_BATCH_BUFFER_END     (0xA<<23)
 125
 126
 127 GLboolean intel_batchbuffer_flush( struct intel_batchbuffer *batch )
 128 {
 129    struct intel_context *intel = batch->intel;
 130    GLuint used = batch->ptr - (batch->map + batch->offset);
 131    GLuint offset;
 132    GLint retval = GL_TRUE;
 133
 134    assert(intel->locked);
 135
 136    if (used == 0) {
 137       bmReleaseBuffers( batch->intel );
 138       return GL_TRUE;
 139    }
 140
 141    /* Add the MI_BATCH_BUFFER_END.  Always add an MI_FLUSH - this is a
 142     * performance drain that we would like to avoid.
 143     */
 144    if (used & 4) {
 145       ((int *)batch->ptr)[0] = MI_BATCH_BUFFER_END;
 146       batch->ptr += 4;
 147       used += 4;
 148    }
 149    else {
 150       ((int *)batch->ptr)[0] = 0;
 151       ((int *)batch->ptr)[1] = MI_BATCH_BUFFER_END;
 152
 153       batch->ptr += 8;
 154       used += 8;
 155    }
 156
 157    intel_batchbuffer_unmap(batch);
 158
 159    /* Get the batch buffer offset: Must call bmBufferOffset() before
 160     * bmValidateBuffers(), otherwise the buffer won't be on the inuse
 161     * list.
 162     */
 163    offset = bmBufferOffset(batch->intel, batch->buffer);
 164
 165    if (bmValidateBuffers( batch->intel ) != 0) {
 166       assert(intel->locked);
 167       bmReleaseBuffers( batch->intel );
 168       retval = GL_FALSE;
 169       goto out;
 170    }
 171
 172    if (INTEL_DEBUG & DEBUG_BATCH) {
 173       char *map;
 174
 175       map = bmMapBuffer(batch->intel, batch->buffer,
 176                         BM_MEM_AGP|BM_MEM_LOCAL|BM_CLIENT);
 177       intel_decode((uint32_t *)(map + batch->offset), used / 4,
 178                    offset + batch->offset, intel->intelScreen->deviceID);
 179       bmUnmapBuffer(batch->intel, batch->buffer);
 180    }
 181
 182    /* Fire the batch buffer, which was uploaded above:
 183     */
 184    intel_batch_ioctl(batch->intel,
 185                      offset + batch->offset,
 186                      used);
 187
 188    /* Reset the buffer:
 189     */
 190  out:
 191    intel_batchbuffer_reset( batch );
 192    intel_batchbuffer_map( batch );
 193
 194    if (!retval)
 195       DBG("%s failed\n", __FUNCTION__);
 196
 197    return retval;
 198 }
 199
 200
 201
 202
 203
 204
 205
 206 void intel_batchbuffer_align( struct intel_batchbuffer *batch,
 207                               GLuint align,
 208                               GLuint sz )
 209 {
 210    unsigned long ptr = (unsigned long) batch->ptr;
 211    unsigned long aptr = (ptr + align) & ~((unsigned long)align-1);
 212    GLuint fixup = aptr - ptr;
 213
 214    if (intel_batchbuffer_space(batch) < fixup + sz)
 215       intel_batchbuffer_flush(batch);
 216    else {
 217       memset(batch->ptr, 0, fixup);
 218       batch->ptr += fixup;
 219    }
 220 }
 221
 222
 223
 224
 225 void intel_batchbuffer_data(struct intel_batchbuffer *batch,
 226                             const void *data,
 227                             GLuint bytes,
 228                             GLuint flags)
 229 {
 230    assert((bytes & 3) == 0);
 231    intel_batchbuffer_require_space(batch, bytes, flags);
 232    __memcpy(batch->ptr, data, bytes);
 233    batch->ptr += bytes;
 234 }
 235