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         i915_kernel_lost_context(dev);
 136         while(pages > 0) {
 137                 cur_pages = pages;
 138                 if (cur_pages > 2048)
 139                         cur_pages = 2048;
 140                 pages -= cur_pages;
 141
 142                 BEGIN_LP_RING(6);
 143                 OUT_RING(SRC_COPY_BLT_CMD | XY_SRC_COPY_BLT_WRITE_ALPHA |
 144                          XY_SRC_COPY_BLT_WRITE_RGB);
 145                 OUT_RING((stride & 0xffff) | ( 0xcc << 16) | (1 << 24) |
 146                          (1 << 25) | (direction ? (1 << 30) : 0));
 147                 OUT_RING((cur_pages << 16) | PAGE_SIZE);
 148                 OUT_RING(dst_offset);
 149                 OUT_RING(stride & 0xffff);
 150                 OUT_RING(src_offset);
 151                 ADVANCE_LP_RING();
 152         }
 153         return;
 154 }
 155
 156 static int i915_move_blit(drm_buffer_object_t *bo,
 157                             int evict,
 158                             int no_wait,
 159                             drm_bo_mem_reg_t *new_mem)
 160 {
 161         drm_bo_mem_reg_t *old_mem = &bo->mem;
 162         int dir = 0;
 163
 164         if ((old_mem->mem_type == new_mem->mem_type) &&
 165             (new_mem->mm_node->start <
 166              old_mem->mm_node->start +  old_mem->mm_node->size)) {
 167                 dir = 1;
 168         }
 169
 170         i915_emit_copy_blit(bo->dev,
 171                             old_mem->mm_node->start << PAGE_SHIFT,
 172                             new_mem->mm_node->start << PAGE_SHIFT,
 173                             new_mem->num_pages,
 174                             dir);
 175
 176         i915_emit_mi_flush(bo->dev, MI_READ_FLUSH | MI_EXE_FLUSH);
 177
 178         return drm_bo_move_accel_cleanup(bo, evict, no_wait,
 179                                          DRM_FENCE_TYPE_EXE |
 180                                          DRM_I915_FENCE_TYPE_RW,
 181                                          DRM_I915_FENCE_FLAG_FLUSHED,
 182                                          new_mem);
 183 }
 184
 185 /*
 186  * Flip destination ttm into cached-coherent AGP,
 187  * then blit and subsequently move out again.
 188  */
 189
 190
 191 static int i915_move_flip(drm_buffer_object_t *bo,
 192                           int evict,
 193                           int no_wait,
 194                           drm_bo_mem_reg_t *new_mem)
 195 {
 196         drm_device_t *dev = bo->dev;
 197         drm_bo_mem_reg_t tmp_mem;
 198         int ret;
 199
 200         tmp_mem = *new_mem;
 201         tmp_mem.mm_node = NULL;
 202         tmp_mem.mask = DRM_BO_FLAG_MEM_TT |
 203                 DRM_BO_FLAG_CACHED  |
 204                 DRM_BO_FLAG_FORCE_CACHING;
 205
 206         ret = drm_bo_mem_space(dev, &tmp_mem, no_wait);
 207         if (ret)
 208                 return ret;
 209
 210         ret = drm_bind_ttm(bo->ttm, 1, tmp_mem.mm_node->start);
 211         if (ret)
 212                 goto out_cleanup;
 213
 214         ret = i915_move_blit(bo, 1, no_wait, &tmp_mem);
 215         if (ret)
 216                 goto out_cleanup;
 217
 218         ret = drm_bo_move_ttm(bo, evict, no_wait, new_mem);
 219 out_cleanup:
 220         if (tmp_mem.mm_node) {
 221                 mutex_lock(&dev->struct_mutex);
 222                 drm_mm_put_block(tmp_mem.mm_node);
 223                 tmp_mem.mm_node = NULL;
 224                 mutex_unlock(&dev->struct_mutex);
 225         }
 226         return ret;
 227 }
 228
 229
 230 int i915_move(drm_buffer_object_t *bo,
 231               int evict,
 232               int no_wait,
 233               drm_bo_mem_reg_t *new_mem)
 234 {
 235         drm_bo_mem_reg_t *old_mem = &bo->mem;
 236
 237         if (old_mem->mem_type == DRM_BO_MEM_LOCAL)
 238                 return drm_bo_move_memcpy(bo, evict, no_wait, new_mem);
 239         if (new_mem->mem_type == DRM_BO_MEM_LOCAL) {
 240                 if (i915_move_flip(bo, evict, no_wait, new_mem))
 241                         return drm_bo_move_memcpy(bo, evict, no_wait, new_mem);
 242         } else {
 243                 if (i915_move_blit(bo, evict, no_wait, new_mem))
 244                         return drm_bo_move_memcpy(bo, evict, no_wait, new_mem);
 245         }
 246         return 0;
 247 }