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 struct drm_ttm_backend *i915_create_ttm_backend_entry(struct drm_device * dev)
  37 {
  38         return drm_agp_init_ttm(dev);
  39 }
  40
  41 int i915_fence_types(struct drm_buffer_object *bo,
  42                      uint32_t * fclass,
  43                      uint32_t * type)
  44 {
  45         if (bo->mem.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(struct drm_device * dev, uint64_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(struct drm_device * dev, uint32_t type,
  69                        struct drm_mem_type_manager * man)
  70 {
  71         switch (type) {
  72         case DRM_BO_MEM_LOCAL:
  73                 man->flags = _DRM_FLAG_MEMTYPE_MAPPABLE |
  74                     _DRM_FLAG_MEMTYPE_CACHED;
  75                 man->drm_bus_maptype = 0;
  76                 man->gpu_offset = 0;
  77                 break;
  78         case DRM_BO_MEM_TT:
  79                 if (!(drm_core_has_AGP(dev) && dev->agp)) {
  80                         DRM_ERROR("AGP is not enabled for memory type %u\n",
  81                                   (unsigned)type);
  82                         return -EINVAL;
  83                 }
  84                 man->io_offset = dev->agp->agp_info.aper_base;
  85                 man->io_size = dev->agp->agp_info.aper_size * 1024 * 1024;
  86                 man->io_addr = NULL;
  87                 man->flags = _DRM_FLAG_MEMTYPE_MAPPABLE |
  88                     _DRM_FLAG_MEMTYPE_CSELECT | _DRM_FLAG_NEEDS_IOREMAP;
  89                 man->drm_bus_maptype = _DRM_AGP;
  90                 man->gpu_offset = 0;
  91                 break;
  92         case DRM_BO_MEM_PRIV0:
  93                 if (!(drm_core_has_AGP(dev) && dev->agp)) {
  94                         DRM_ERROR("AGP is not enabled for memory type %u\n",
  95                                   (unsigned)type);
  96                         return -EINVAL;
  97                 }
  98                 man->io_offset = dev->agp->agp_info.aper_base;
  99                 man->io_size = dev->agp->agp_info.aper_size * 1024 * 1024;
 100                 man->io_addr = NULL;
 101                 man->flags =  _DRM_FLAG_MEMTYPE_MAPPABLE |
 102                     _DRM_FLAG_MEMTYPE_FIXED | _DRM_FLAG_NEEDS_IOREMAP;
 103                 man->drm_bus_maptype = _DRM_AGP;
 104                 man->gpu_offset = 0;
 105                 break;
 106         default:
 107                 DRM_ERROR("Unsupported memory type %u\n", (unsigned)type);
 108                 return -EINVAL;
 109         }
 110         return 0;
 111 }
 112
 113 uint32_t i915_evict_mask(struct drm_buffer_object *bo)
 114 {
 115         switch (bo->mem.mem_type) {
 116         case DRM_BO_MEM_LOCAL:
 117         case DRM_BO_MEM_TT:
 118                 return DRM_BO_FLAG_MEM_LOCAL;
 119         default:
 120                 return DRM_BO_FLAG_MEM_TT | DRM_BO_FLAG_CACHED;
 121         }
 122 }
 123
 124 static void i915_emit_copy_blit(struct drm_device * dev,
 125                                 uint32_t src_offset,
 126                                 uint32_t dst_offset,
 127                                 uint32_t pages, int direction)
 128 {
 129         uint32_t cur_pages;
 130         uint32_t stride = PAGE_SIZE;
 131         drm_i915_private_t *dev_priv = dev->dev_private;
 132         RING_LOCALS;
 133
 134         if (!dev_priv)
 135                 return;
 136
 137         i915_kernel_lost_context(dev);
 138         while (pages > 0) {
 139                 cur_pages = pages;
 140                 if (cur_pages > 2048)
 141                         cur_pages = 2048;
 142                 pages -= cur_pages;
 143
 144                 BEGIN_LP_RING(6);
 145                 OUT_RING(SRC_COPY_BLT_CMD | XY_SRC_COPY_BLT_WRITE_ALPHA |
 146                          XY_SRC_COPY_BLT_WRITE_RGB);
 147                 OUT_RING((stride & 0xffff) | (0xcc << 16) | (1 << 24) |
 148                          (1 << 25) | (direction ? (1 << 30) : 0));
 149                 OUT_RING((cur_pages << 16) | PAGE_SIZE);
 150                 OUT_RING(dst_offset);
 151                 OUT_RING(stride & 0xffff);
 152                 OUT_RING(src_offset);
 153                 ADVANCE_LP_RING();
 154         }
 155         return;
 156 }
 157
 158 static int i915_move_blit(struct drm_buffer_object * bo,
 159                           int evict, int no_wait, struct drm_bo_mem_reg * new_mem)
 160 {
 161         struct drm_bo_mem_reg *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, dir);
 174
 175         i915_emit_mi_flush(bo->dev, MI_READ_FLUSH | MI_EXE_FLUSH);
 176
 177         return drm_bo_move_accel_cleanup(bo, evict, no_wait, 0,
 178                                          DRM_FENCE_TYPE_EXE |
 179                                          DRM_I915_FENCE_TYPE_RW,
 180                                          DRM_I915_FENCE_FLAG_FLUSHED, new_mem);
 181 }
 182
 183 /*
 184  * Flip destination ttm into cached-coherent AGP,
 185  * then blit and subsequently move out again.
 186  */
 187
 188 static int i915_move_flip(struct drm_buffer_object * bo,
 189                           int evict, int no_wait, struct drm_bo_mem_reg * new_mem)
 190 {
 191         struct drm_device *dev = bo->dev;
 192         struct drm_bo_mem_reg tmp_mem;
 193         int ret;
 194
 195         tmp_mem = *new_mem;
 196         tmp_mem.mm_node = NULL;
 197         tmp_mem.mask = DRM_BO_FLAG_MEM_TT |
 198             DRM_BO_FLAG_CACHED | DRM_BO_FLAG_FORCE_CACHING;
 199
 200         ret = drm_bo_mem_space(bo, &tmp_mem, no_wait);
 201         if (ret)
 202                 return ret;
 203
 204         ret = drm_bind_ttm(bo->ttm, &tmp_mem);
 205         if (ret)
 206                 goto out_cleanup;
 207
 208         ret = i915_move_blit(bo, 1, no_wait, &tmp_mem);
 209         if (ret)
 210                 goto out_cleanup;
 211
 212         ret = drm_bo_move_ttm(bo, evict, no_wait, new_mem);
 213 out_cleanup:
 214         if (tmp_mem.mm_node) {
 215                 mutex_lock(&dev->struct_mutex);
 216                 if (tmp_mem.mm_node != bo->pinned_node)
 217                         drm_mm_put_block(tmp_mem.mm_node);
 218                 tmp_mem.mm_node = NULL;
 219                 mutex_unlock(&dev->struct_mutex);
 220         }
 221         return ret;
 222 }
 223
 224 int i915_move(struct drm_buffer_object * bo,
 225               int evict, int no_wait, struct drm_bo_mem_reg * new_mem)
 226 {
 227         struct drm_bo_mem_reg *old_mem = &bo->mem;
 228
 229         if (old_mem->mem_type == DRM_BO_MEM_LOCAL) {
 230                 return drm_bo_move_memcpy(bo, evict, no_wait, new_mem);
 231         } else if (new_mem->mem_type == DRM_BO_MEM_LOCAL) {
 232                 if (i915_move_flip(bo, evict, no_wait, new_mem))
 233                         return drm_bo_move_memcpy(bo, evict, no_wait, new_mem);
 234         } else {
 235                 if (i915_move_blit(bo, evict, no_wait, new_mem))
 236                         return drm_bo_move_memcpy(bo, evict, no_wait, new_mem);
 237         }
 238         return 0;
 239 }