src/mesa/drivers/dri/intel_winsys/intel_winsys_i915.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2006 Tungsten Graphics, Inc., Bismarck, ND., USA
   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 SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  17  * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
  18  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  19  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  20  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  21  *
  22  * The above copyright notice and this permission notice (including the
  23  * next paragraph) shall be included in all copies or substantial portions
  24  * of the Software.
  25  *
  26  *
  27  **************************************************************************/
  28 /*
  29  * Authors: Keith Whitwell <keithw-at-tungstengraphics-dot-com>
  30  */
  31
  32 #include <stdlib.h>
  33 #include <xf86drm.h>
  34 #include "dri_bufpool.h"
  35 #include "dri_bufmgr.h"
  36
  37 #include "intel_context.h"
  38 #include "intel_batchbuffer.h"
  39 #include "intel_winsys.h"
  40 #include "intel_blit.h"
  41
  42 #include "pipe/i915simple/i915_winsys.h"
  43
  44
  45 struct intel_i915_winsys {
  46    struct i915_winsys winsys;
  47    struct intel_context *intel;
  48 };
  49
  50
  51 /* Turn a i915simple winsys into an intel/i915simple winsys:
  52  */
  53 static inline struct intel_i915_winsys *
  54 intel_i915_winsys( struct i915_winsys *sws )
  55 {
  56    return (struct intel_i915_winsys *)sws;
  57 }
  58
  59
  60 /* Simple batchbuffer interface:
  61  */
  62
  63 static unsigned *intel_i915_batch_start( struct i915_winsys *sws,
  64                                          unsigned dwords,
  65                                          unsigned relocs )
  66 {
  67    struct intel_context *intel = intel_i915_winsys(sws)->intel;
  68
  69    /* XXX: check relocs.
  70     */
  71    if (intel_batchbuffer_space( intel->batch ) >= dwords * 4) {
  72       /* XXX: Hmm, the driver can't really do much with this pointer:
  73        */
  74       return (unsigned *)intel->batch->ptr;
  75    }
  76    else
  77       return NULL;
  78 }
  79
  80 static void intel_i915_batch_dword( struct i915_winsys *sws,
  81                                     unsigned dword )
  82 {
  83    struct intel_context *intel = intel_i915_winsys(sws)->intel;
  84    intel_batchbuffer_emit_dword( intel->batch, dword );
  85 }
  86
  87 static void intel_i915_batch_reloc( struct i915_winsys *sws,
  88                              struct pipe_buffer_handle *buf,
  89                              unsigned access_flags,
  90                              unsigned delta )
  91 {
  92    struct intel_context *intel = intel_i915_winsys(sws)->intel;
  93    unsigned flags = DRM_BO_FLAG_MEM_TT;
  94    unsigned mask = DRM_BO_MASK_MEM;
  95
  96    if (access_flags & I915_BUFFER_ACCESS_WRITE) {
  97       flags |= DRM_BO_FLAG_WRITE;
  98       mask |= DRM_BO_FLAG_WRITE;
  99    }
 100
 101    if (access_flags & I915_BUFFER_ACCESS_READ) {
 102       flags |= DRM_BO_FLAG_READ;
 103       mask |= DRM_BO_FLAG_READ;
 104    }
 105
 106    intel_batchbuffer_emit_reloc( intel->batch,
 107                                  dri_bo( buf ),
 108                                  flags, mask,
 109                                  delta );
 110 }
 111
 112
 113
 114 static void intel_i915_batch_flush( struct i915_winsys *sws )
 115 {
 116    struct intel_context *intel = intel_i915_winsys(sws)->intel;
 117
 118    intel_batchbuffer_flush( intel->batch );
 119    if (0) intel_i915_batch_wait_idle( sws );
 120 }
 121
 122
 123
 124
 125 struct pipe_context *
 126 intel_create_i915simple( struct intel_context *intel )
 127 {
 128    struct intel_i915_winsys *iws = CALLOC_STRUCT( intel_i915_winsys );
 129
 130    /* Fill in this struct with callbacks that i915simple will need to
 131     * communicate with the window system, buffer manager, etc.
 132     */
 133    iws->winsys.batch_start = intel_i915_batch_start;
 134    iws->winsys.batch_dword = intel_i915_batch_dword;
 135    iws->winsys.batch_reloc = intel_i915_batch_reloc;
 136    iws->winsys.batch_flush = intel_i915_batch_flush;
 137    iws->intel = intel;
 138
 139    /* Create the i915simple context:
 140     */
 141    return i915_create( intel_create_pipe_winsys(intel),
 142                        &iws->winsys,
 143                        intel->intelScreen->deviceID );
 144 }