linux-core/i915_buffer.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: Thomas Hellström <thomas-at-tungstengraphics-dot-com>
  30  */
  31
  32 #include "drmP.h"
  33 #include "i915_drm.h"
  34 #include "i915_drv.h"
  35
  36
  37 drm_ttm_backend_t *i915_create_ttm_backend_entry(drm_device_t * dev)
  38 {
  39         return drm_agp_init_ttm(dev, NULL);
  40 }
  41
  42 int i915_fence_types(uint32_t buffer_flags, uint32_t * class, uint32_t * type)
  43 {
  44         *class = 0;
  45         if (buffer_flags & (DRM_BO_FLAG_READ | DRM_BO_FLAG_WRITE))
  46                 *type = 3;
  47         else
  48                 *type = 1;
  49         return 0;
  50 }
  51
  52 int i915_invalidate_caches(drm_device_t * dev, uint32_t flags)
  53 {
  54         /*
  55          * FIXME: Only emit once per batchbuffer submission.
  56          */
  57
  58         uint32_t flush_cmd = MI_NO_WRITE_FLUSH;
  59
  60         if (flags & DRM_BO_FLAG_READ)
  61                 flush_cmd |= MI_READ_FLUSH;
  62         if (flags & DRM_BO_FLAG_EXE)
  63                 flush_cmd |= MI_EXE_FLUSH;
  64
  65         return i915_emit_mi_flush(dev, flush_cmd);
  66 }
  67
  68 int i915_init_mem_type(drm_device_t *dev, uint32_t type,
  69                        drm_mem_type_manager_t *man)
  70 {
  71         switch(type) {
  72         case DRM_BO_MEM_LOCAL:
  73                 man->flags = _DRM_FLAG_MEMTYPE_MAPPABLE |
  74                         _DRM_FLAG_MEMTYPE_CACHED;
  75                 break;
  76         case DRM_BO_MEM_TT:
  77                 if (!(drm_core_has_AGP(dev) && dev->agp)) {
  78                         DRM_ERROR("AGP is not enabled for memory type %u\n",
  79                                   (unsigned) type);
  80                         return -EINVAL;
  81                 }
  82                 man->io_offset = dev->agp->agp_info.aper_base;
  83                 man->io_size = dev->agp->agp_info.aper_size * 1024 * 1024;
  84                 man->io_addr = NULL;
  85                 man->flags = _DRM_FLAG_MEMTYPE_MAPPABLE |
  86                         _DRM_FLAG_MEMTYPE_CSELECT |
  87                         _DRM_FLAG_NEEDS_IOREMAP;
  88                 break;
  89         case DRM_BO_MEM_PRIV0:
  90                 if (!(drm_core_has_AGP(dev) && dev->agp)) {
  91                         DRM_ERROR("AGP is not enabled for memory type %u\n",
  92                                   (unsigned) type);
  93                         return -EINVAL;
  94                 }
  95                 man->io_offset = dev->agp->agp_info.aper_base;
  96                 man->io_size = dev->agp->agp_info.aper_size * 1024 * 1024;
  97                 man->io_addr = NULL;
  98                 man->flags = _DRM_FLAG_MEMTYPE_MAPPABLE |
  99                         _DRM_FLAG_MEMTYPE_FIXED |
 100                         _DRM_FLAG_NEEDS_IOREMAP;
 101
 102                 break;
 103         default:
 104                 DRM_ERROR("Unsupported memory type %u\n", (unsigned) type);
 105                 return -EINVAL;
 106         }
 107         return 0;
 108 }
 109
 110 uint32_t i915_evict_flags(drm_device_t *dev, uint32_t type)
 111 {
 112         switch(type) {
 113         case DRM_BO_MEM_LOCAL:
 114         case DRM_BO_MEM_TT:
 115                 return DRM_BO_FLAG_MEM_LOCAL;
 116         default:
 117                 return DRM_BO_FLAG_MEM_TT;
 118         }
 119 }
 120
 121 static void i915_emit_copy_blit(drm_device_t *dev,
 122                          uint32_t src_offset,
 123                          uint32_t dst_offset,
 124                          uint32_t pages,
 125                          int direction)
 126 {
 127         uint32_t cur_pages;
 128         uint32_t stride = PAGE_SIZE;
 129         drm_i915_private_t *dev_priv = dev->dev_private;
 130         RING_LOCALS;
 131
 132         if (!dev_priv)
 133                 return;
 134
 135         if (direction) {
 136                 stride = -stride;
 137                 src_offset += (pages - 1) << PAGE_SHIFT;
 138                 dst_offset += (pages - 1) << PAGE_SHIFT;
 139         }
 140
 141         while(pages > 0) {
 142                 cur_pages = pages;
 143                 if (cur_pages > 2048)
 144                         cur_pages = 2048;
 145                 pages -= cur_pages;
 146
 147                 BEGIN_LP_RING(8);
 148                 OUT_RING(XY_SRC_COPY_BLT_CMD | XY_SRC_COPY_BLT_WRITE_ALPHA |
 149                          XY_SRC_COPY_BLT_WRITE_RGB);
 150                 OUT_RING((stride & 0xffff) | ( 0xcc << 16) | (1 << 24) |
 151                          (1 << 25));
 152                 OUT_RING(0);
 153                 OUT_RING((cur_pages << 16) | (PAGE_SIZE >> 2));
 154                 OUT_RING(dst_offset);
 155                 OUT_RING(0);
 156                 OUT_RING(stride & 0xffff);
 157                 OUT_RING(src_offset);
 158                 ADVANCE_LP_RING();
 159                 dst_offset += (cur_pages << PAGE_SHIFT)*(direction ? -1 : 1);
 160                 src_offset += (cur_pages << PAGE_SHIFT)*(direction ? -1 : 1);
 161         }
 162         return;
 163 }
 164
 165 static int drm_bo_move_blit(drm_buffer_object_t *bo,
 166                             int evict,
 167                             int no_wait,
 168                             drm_bo_mem_reg_t *new_mem)
 169 {
 170         drm_bo_mem_reg_t *old_mem = &bo->mem;
 171         int dir = 0;
 172
 173         if ((old_mem->mem_type == new_mem->mem_type) &&
 174             (new_mem->mm_node->start <
 175              old_mem->mm_node->start +  old_mem->mm_node->size)) {
 176                 dir = 1;
 177         }
 178
 179         i915_emit_copy_blit(bo->dev,
 180                             old_mem->mm_node->start << PAGE_SHIFT,
 181                             new_mem->mm_node->start << PAGE_SHIFT,
 182                             new_mem->num_pages,
 183                             dir);
 184
 185         i915_emit_mi_flush(bo->dev, MI_READ_FLUSH | MI_EXE_FLUSH);
 186
 187         return drm_bo_move_accel_cleanup(bo, evict, no_wait,
 188                                          DRM_FENCE_TYPE_EXE |
 189                                          DRM_I915_FENCE_TYPE_RW,
 190                                          DRM_I915_FENCE_FLAG_FLUSHED,
 191                                          new_mem);
 192 }
 193
 194
 195