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 drm_ttm_backend_t *i915_create_ttm_backend_entry(drm_device_t * dev)
  37 {
  38         return drm_agp_init_ttm(dev, NULL);
  39 }
  40
  41 int i915_fence_types(uint32_t buffer_flags, uint32_t * class, uint32_t * type)
  42 {
  43         *class = 0;
  44         if (buffer_flags & (DRM_BO_FLAG_READ | DRM_BO_FLAG_WRITE))
  45                 *type = 3;
  46         else
  47                 *type = 1;
  48         return 0;
  49 }
  50
  51 int i915_invalidate_caches(drm_device_t * dev, uint32_t flags)
  52 {
  53         /*
  54          * FIXME: Only emit once per batchbuffer submission.
  55          */
  56
  57         uint32_t flush_cmd = MI_NO_WRITE_FLUSH;
  58
  59         if (flags & DRM_BO_FLAG_READ)
  60                 flush_cmd |= MI_READ_FLUSH;
  61         if (flags & DRM_BO_FLAG_EXE)
  62                 flush_cmd |= MI_EXE_FLUSH;
  63
  64         return i915_emit_mi_flush(dev, flush_cmd);
  65 }
  66
  67 int i915_init_mem_type(drm_device_t * dev, uint32_t type,
  68                        drm_mem_type_manager_t * man)
  69 {
  70         switch (type) {
  71         case DRM_BO_MEM_LOCAL:
  72                 man->flags = _DRM_FLAG_MEMTYPE_MAPPABLE |
  73                     _DRM_FLAG_MEMTYPE_CACHED;
  74                 break;
  75         case DRM_BO_MEM_TT:
  76                 if (!(drm_core_has_AGP(dev) && dev->agp)) {
  77                         DRM_ERROR("AGP is not enabled for memory type %u\n",
  78                                   (unsigned)type);
  79                         return -EINVAL;
  80                 }
  81                 man->io_offset = dev->agp->agp_info.aper_base;
  82                 man->io_size = dev->agp->agp_info.aper_size * 1024 * 1024;
  83                 man->io_addr = NULL;
  84                 man->flags = _DRM_FLAG_MEMTYPE_MAPPABLE |
  85                     _DRM_FLAG_MEMTYPE_CSELECT | _DRM_FLAG_NEEDS_IOREMAP;
  86                 break;
  87         case DRM_BO_MEM_PRIV0:
  88                 if (!(drm_core_has_AGP(dev) && dev->agp)) {
  89                         DRM_ERROR("AGP is not enabled for memory type %u\n",
  90                                   (unsigned)type);
  91                         return -EINVAL;
  92                 }
  93                 man->io_offset = dev->agp->agp_info.aper_base;
  94                 man->io_size = dev->agp->agp_info.aper_size * 1024 * 1024;
  95                 man->io_addr = NULL;
  96                 man->flags = _DRM_FLAG_MEMTYPE_MAPPABLE |
  97                     _DRM_FLAG_MEMTYPE_FIXED | _DRM_FLAG_NEEDS_IOREMAP;
  98
  99                 break;
 100         default:
 101                 DRM_ERROR("Unsupported memory type %u\n", (unsigned)type);
 102                 return -EINVAL;
 103         }
 104         return 0;
 105 }
 106
 107 uint32_t i915_evict_flags(drm_device_t * dev, uint32_t type)
 108 {
 109         switch (type) {
 110         case DRM_BO_MEM_LOCAL:
 111         case DRM_BO_MEM_TT:
 112                 return DRM_BO_FLAG_MEM_LOCAL;
 113         default:
 114                 return DRM_BO_FLAG_MEM_TT;
 115         }
 116 }
 117
 118 static void i915_emit_copy_blit(drm_device_t * dev,
 119                                 uint32_t src_offset,
 120                                 uint32_t dst_offset,
 121                                 uint32_t pages, int direction)
 122 {
 123         uint32_t cur_pages;
 124         uint32_t stride = PAGE_SIZE;
 125         drm_i915_private_t *dev_priv = dev->dev_private;
 126         RING_LOCALS;
 127
 128         if (!dev_priv)
 129                 return;
 130
 131         i915_kernel_lost_context(dev);
 132         while (pages > 0) {
 133                 cur_pages = pages;
 134                 if (cur_pages > 2048)
 135                         cur_pages = 2048;
 136                 pages -= cur_pages;
 137
 138                 BEGIN_LP_RING(6);
 139                 OUT_RING(SRC_COPY_BLT_CMD | XY_SRC_COPY_BLT_WRITE_ALPHA |
 140                          XY_SRC_COPY_BLT_WRITE_RGB);
 141                 OUT_RING((stride & 0xffff) | (0xcc << 16) | (1 << 24) |
 142                          (1 << 25) | (direction ? (1 << 30) : 0));
 143                 OUT_RING((cur_pages << 16) | PAGE_SIZE);
 144                 OUT_RING(dst_offset);
 145                 OUT_RING(stride & 0xffff);
 146                 OUT_RING(src_offset);
 147                 ADVANCE_LP_RING();
 148         }
 149         return;
 150 }
 151
 152 static int i915_move_blit(drm_buffer_object_t * bo,
 153                           int evict, int no_wait, drm_bo_mem_reg_t * new_mem)
 154 {
 155         drm_bo_mem_reg_t *old_mem = &bo->mem;
 156         int dir = 0;
 157
 158         if ((old_mem->mem_type == new_mem->mem_type) &&
 159             (new_mem->mm_node->start <
 160              old_mem->mm_node->start + old_mem->mm_node->size)) {
 161                 dir = 1;
 162         }
 163
 164         i915_emit_copy_blit(bo->dev,
 165                             old_mem->mm_node->start << PAGE_SHIFT,
 166                             new_mem->mm_node->start << PAGE_SHIFT,
 167                             new_mem->num_pages, dir);
 168
 169         i915_emit_mi_flush(bo->dev, MI_READ_FLUSH | MI_EXE_FLUSH);
 170
 171         return drm_bo_move_accel_cleanup(bo, evict, no_wait,
 172                                          DRM_FENCE_TYPE_EXE |
 173                                          DRM_I915_FENCE_TYPE_RW,
 174                                          DRM_I915_FENCE_FLAG_FLUSHED, new_mem);
 175 }
 176
 177 /*
 178  * Flip destination ttm into cached-coherent AGP,
 179  * then blit and subsequently move out again.
 180  */
 181
 182 static int i915_move_flip(drm_buffer_object_t * bo,
 183                           int evict, int no_wait, drm_bo_mem_reg_t * new_mem)
 184 {
 185         drm_device_t *dev = bo->dev;
 186         drm_bo_mem_reg_t tmp_mem;
 187         int ret;
 188
 189         tmp_mem = *new_mem;
 190         tmp_mem.mm_node = NULL;
 191         tmp_mem.mask = DRM_BO_FLAG_MEM_TT |
 192             DRM_BO_FLAG_CACHED | DRM_BO_FLAG_FORCE_CACHING;
 193
 194         ret = drm_bo_mem_space(bo, &tmp_mem, no_wait);
 195         if (ret)
 196                 return ret;
 197
 198         ret = drm_bind_ttm(bo->ttm, 1, tmp_mem.mm_node->start);
 199         if (ret)
 200                 goto out_cleanup;
 201
 202         ret = i915_move_blit(bo, 1, no_wait, &tmp_mem);
 203         if (ret)
 204                 goto out_cleanup;
 205
 206         ret = drm_bo_move_ttm(bo, evict, no_wait, new_mem);
 207       out_cleanup:
 208         if (tmp_mem.mm_node) {
 209                 mutex_lock(&dev->struct_mutex);
 210                 drm_mm_put_block(tmp_mem.mm_node);
 211                 tmp_mem.mm_node = NULL;
 212                 mutex_unlock(&dev->struct_mutex);
 213         }
 214         return ret;
 215 }
 216
 217 int i915_move(drm_buffer_object_t * bo,
 218               int evict, int no_wait, drm_bo_mem_reg_t * new_mem)
 219 {
 220         drm_bo_mem_reg_t *old_mem = &bo->mem;
 221
 222         if (old_mem->mem_type == DRM_BO_MEM_LOCAL) {
 223                 return drm_bo_move_memcpy(bo, evict, no_wait, new_mem);
 224         } else if (new_mem->mem_type == DRM_BO_MEM_LOCAL) {
 225                 if (i915_move_flip(bo, evict, no_wait, new_mem))
 226                         return drm_bo_move_memcpy(bo, evict, no_wait, new_mem);
 227         } else {
 228                 if (i915_move_blit(bo, evict, no_wait, new_mem))
 229                         return drm_bo_move_memcpy(bo, evict, no_wait, new_mem);
 230         }
 231         return 0;
 232 }