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 "brw_batchbuffer.h"
  29 #include "brw_decode.h"
  30 #include "brw_reg.h"
  31 #include "brw_winsys.h"
  32
  33
  34 void
  35 brw_batchbuffer_reset(struct brw_batchbuffer *batch)
  36 {
  37    struct intel_context *intel = batch->intel;
  38
  39    if (batch->buf != NULL) {
  40       brw->sws->bo_unreference(batch->buf);
  41       batch->buf = NULL;
  42    }
  43
  44    if (!batch->buffer && intel->ttm == GL_TRUE)
  45       batch->buffer = malloc (intel->maxBatchSize);
  46
  47    batch->buf = batch->sws->bo_alloc(batch->sws,
  48                                      BRW_BUFFER_TYPE_BATCH,
  49                                      intel->maxBatchSize, 4096);
  50    if (batch->buffer)
  51       batch->map = batch->buffer;
  52    else {
  53       batch->sws->bo_map(batch->buf, GL_TRUE);
  54       batch->map = batch->buf->virtual;
  55    }
  56    batch->size = intel->maxBatchSize;
  57    batch->ptr = batch->map;
  58    batch->dirty_state = ~0;
  59    batch->cliprect_mode = IGNORE_CLIPRECTS;
  60 }
  61
  62 struct brw_batchbuffer *
  63 brw_batchbuffer_alloc(struct brw_winsys_screen *sws)
  64 {
  65    struct brw_batchbuffer *batch = CALLOC_STRUCT(brw_batchbuffer);
  66
  67    batch->sws = sws;
  68    brw_batchbuffer_reset(batch);
  69
  70    return batch;
  71 }
  72
  73 void
  74 brw_batchbuffer_free(struct brw_batchbuffer *batch)
  75 {
  76    if (batch->map) {
  77       dri_bo_unmap(batch->buf);
  78       batch->map = NULL;
  79    }
  80
  81    brw->sws->bo_unreference(batch->buf);
  82    batch->buf = NULL;
  83    FREE(batch);
  84 }
  85
  86
  87 void
  88 _brw_batchbuffer_flush(struct brw_batchbuffer *batch, const char *file,
  89                          int line)
  90 {
  91    struct intel_context *intel = batch->intel;
  92    GLuint used = batch->ptr - batch->map;
  93
  94    if (used == 0)
  95       return;
  96
  97    if (intel->first_post_swapbuffers_batch == NULL) {
  98       intel->first_post_swapbuffers_batch = intel->batch->buf;
  99       batch->sws->bo_reference(intel->first_post_swapbuffers_batch);
 100    }
 101
 102    if (intel->first_post_swapbuffers_batch == NULL) {
 103       intel->first_post_swapbuffers_batch = intel->batch->buf;
 104       batch->sws->bo_reference(intel->first_post_swapbuffers_batch);
 105    }
 106
 107
 108    if (INTEL_DEBUG & DEBUG_BATCH)
 109       fprintf(stderr, "%s:%d: Batchbuffer flush with %db used\n", file, line,
 110               used);
 111
 112    /* Emit a flush if the bufmgr doesn't do it for us. */
 113    if (intel->always_flush_cache || !intel->ttm) {
 114       *(GLuint *) (batch->ptr) = intel->vtbl.flush_cmd();
 115       batch->ptr += 4;
 116       used = batch->ptr - batch->map;
 117    }
 118
 119    /* Round batchbuffer usage to 2 DWORDs. */
 120
 121    if ((used & 4) == 0) {
 122       *(GLuint *) (batch->ptr) = 0; /* noop */
 123       batch->ptr += 4;
 124       used = batch->ptr - batch->map;
 125    }
 126
 127    /* Mark the end of the buffer. */
 128    *(GLuint *) (batch->ptr) = MI_BATCH_BUFFER_END; /* noop */
 129    batch->ptr += 4;
 130    used = batch->ptr - batch->map;
 131
 132    batch->sws->bo_unmap(batch->buf);
 133
 134    batch->map = NULL;
 135    batch->ptr = NULL;
 136
 137    batch->sws->bo_exec(batch->buf, used, NULL, 0, 0 );
 138
 139    if (INTEL_DEBUG & DEBUG_BATCH) {
 140       dri_bo_map(batch->buf, GL_FALSE);
 141       intel_decode(batch->buf->virtual, used / 4, batch->buf->offset,
 142                    brw->brw_screen->pci_id);
 143       dri_bo_unmap(batch->buf);
 144    }
 145
 146    if (INTEL_DEBUG & DEBUG_SYNC) {
 147       fprintf(stderr, "waiting for idle\n");
 148       dri_bo_map(batch->buf, GL_TRUE);
 149       dri_bo_unmap(batch->buf);
 150    }
 151
 152    /* Reset the buffer:
 153     */
 154    brw_batchbuffer_reset(batch);
 155 }
 156
 157
 158 /*  This is the only way buffers get added to the validate list.
 159  */
 160 GLboolean
 161 brw_batchbuffer_emit_reloc(struct brw_batchbuffer *batch,
 162                              struct brw_winsys_buffer *buffer,
 163                              uint32_t read_domains, uint32_t write_domain,
 164                              uint32_t delta)
 165 {
 166    int ret;
 167
 168    if (batch->ptr - batch->map > batch->buf->size)
 169       _mesa_printf ("bad relocation ptr %p map %p offset %d size %d\n",
 170                     batch->ptr, batch->map, batch->ptr - batch->map, batch->buf->size);
 171
 172    ret = batch->sws->bo_emit_reloc(batch->buf,
 173                                    read_domains,
 174                                    write_domain,
 175                                    delta,
 176                                    batch->ptr - batch->map,
 177                                    buffer);
 178
 179    /*
 180     * Using the old buffer offset, write in what the right data would be, in case
 181     * the buffer doesn't move and we can short-circuit the relocation processing
 182     * in the kernel
 183     */
 184    brw_batchbuffer_emit_dword (batch, buffer->offset + delta);
 185
 186    return GL_TRUE;
 187 }
 188
 189 void
 190 brw_batchbuffer_data(struct brw_batchbuffer *batch,
 191                        const void *data, GLuint bytes,
 192                        enum cliprect_mode cliprect_mode)
 193 {
 194    assert((bytes & 3) == 0);
 195    brw_batchbuffer_require_space(batch, bytes);
 196    __memcpy(batch->ptr, data, bytes);
 197    batch->ptr += bytes;
 198 }