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, uint32_t * type)
  42 {
  43         if (bo->mem.flags & (DRM_BO_FLAG_READ | DRM_BO_FLAG_WRITE))
  44                 *type = 3;
  45         else
  46                 *type = 1;
  47         return 0;
  48 }
  49
  50 int i915_invalidate_caches(struct drm_device * dev, uint64_t flags)
  51 {
  52         /*
  53          * FIXME: Only emit once per batchbuffer submission.
  54          */
  55
  56         uint32_t flush_cmd = MI_NO_WRITE_FLUSH;
  57
  58         if (flags & DRM_BO_FLAG_READ)
  59                 flush_cmd |= MI_READ_FLUSH;
  60         if (flags & DRM_BO_FLAG_EXE)
  61                 flush_cmd |= MI_EXE_FLUSH;
  62
  63         return i915_emit_mi_flush(dev, flush_cmd);
  64 }
  65
  66 int i915_init_mem_type(struct drm_device * dev, uint32_t type,
  67                        struct drm_mem_type_manager * man)
  68 {
  69         switch (type) {
  70         case DRM_BO_MEM_LOCAL:
  71                 man->flags = _DRM_FLAG_MEMTYPE_MAPPABLE |
  72                     _DRM_FLAG_MEMTYPE_CACHED;
  73                 man->drm_bus_maptype = 0;
  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                 man->drm_bus_maptype = _DRM_AGP;
  87                 break;
  88         case DRM_BO_MEM_VRAM:
  89                 if (!(drm_core_has_AGP(dev) && dev->agp)) {
  90                         DRM_ERROR("AGP is not enabled for memory type %u\n",
  91                                   (unsigned)type);
  92                         return -EINVAL;
  93                 }
  94                 man->io_offset = dev->agp->agp_info.aper_base;
  95                 man->io_size = dev->agp->agp_info.aper_size * 1024 * 1024;
  96                 man->io_addr = NULL;
  97                 man->flags =  _DRM_FLAG_MEMTYPE_MAPPABLE |
  98                     _DRM_FLAG_MEMTYPE_FIXED | _DRM_FLAG_NEEDS_IOREMAP;
  99                 man->drm_bus_maptype = _DRM_AGP;
 100                 break;
 101         case DRM_BO_MEM_PRIV0: /* for OS preallocated space */
 102                 DRM_ERROR("PRIV0 not used yet.\n");
 103                 break;
 104         default:
 105                 DRM_ERROR("Unsupported memory type %u\n", (unsigned)type);
 106                 return -EINVAL;
 107         }
 108         return 0;
 109 }
 110
 111 uint32_t i915_evict_mask(struct drm_buffer_object *bo)
 112 {
 113         switch (bo->mem.mem_type) {
 114         case DRM_BO_MEM_LOCAL:
 115         case DRM_BO_MEM_TT:
 116                 return DRM_BO_FLAG_MEM_LOCAL;
 117         default:
 118                 return DRM_BO_FLAG_MEM_TT | DRM_BO_FLAG_CACHED;
 119         }
 120 }
 121
 122 static void i915_emit_copy_blit(struct drm_device * dev,
 123                                 uint32_t src_offset,
 124                                 uint32_t dst_offset,
 125                                 uint32_t pages, int direction)
 126 {
 127         uint32_t cur_pages;
 128         uint32_t stride = PAGE_SIZE;
 129         struct drm_i915_private *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(struct drm_buffer_object * bo,
 157                           int evict, int no_wait, struct drm_bo_mem_reg * new_mem)
 158 {
 159         struct drm_bo_mem_reg *old_mem = &bo->mem;
 160         int dir = 0;
 161
 162         if ((old_mem->mem_type == new_mem->mem_type) &&
 163             (new_mem->mm_node->start <
 164              old_mem->mm_node->start + old_mem->mm_node->size)) {
 165                 dir = 1;
 166         }
 167
 168         i915_emit_copy_blit(bo->dev,
 169                             old_mem->mm_node->start << PAGE_SHIFT,
 170                             new_mem->mm_node->start << PAGE_SHIFT,
 171                             new_mem->num_pages, dir);
 172
 173         i915_emit_mi_flush(bo->dev, MI_READ_FLUSH | MI_EXE_FLUSH);
 174
 175         return drm_bo_move_accel_cleanup(bo, evict, no_wait, 0,
 176                                          DRM_FENCE_TYPE_EXE |
 177                                          DRM_I915_FENCE_TYPE_RW,
 178                                          DRM_I915_FENCE_FLAG_FLUSHED, new_mem);
 179 }
 180
 181 /*
 182  * Flip destination ttm into cached-coherent AGP,
 183  * then blit and subsequently move out again.
 184  */
 185
 186 static int i915_move_flip(struct drm_buffer_object * bo,
 187                           int evict, int no_wait, struct drm_bo_mem_reg * new_mem)
 188 {
 189         struct drm_device *dev = bo->dev;
 190         struct drm_bo_mem_reg tmp_mem;
 191         int ret;
 192
 193         tmp_mem = *new_mem;
 194         tmp_mem.mm_node = NULL;
 195         tmp_mem.mask = DRM_BO_FLAG_MEM_TT |
 196             DRM_BO_FLAG_CACHED | DRM_BO_FLAG_FORCE_CACHING;
 197
 198         ret = drm_bo_mem_space(bo, &tmp_mem, no_wait);
 199         if (ret)
 200                 return ret;
 201
 202         ret = drm_bind_ttm(bo->ttm, 1, tmp_mem.mm_node->start);
 203         if (ret)
 204                 goto out_cleanup;
 205
 206         ret = i915_move_blit(bo, 1, no_wait, &tmp_mem);
 207         if (ret)
 208                 goto out_cleanup;
 209
 210         ret = drm_bo_move_ttm(bo, evict, no_wait, new_mem);
 211 out_cleanup:
 212         if (tmp_mem.mm_node) {
 213                 mutex_lock(&dev->struct_mutex);
 214                 if (tmp_mem.mm_node != bo->pinned_node)
 215                         drm_mm_put_block(tmp_mem.mm_node);
 216                 tmp_mem.mm_node = NULL;
 217                 mutex_unlock(&dev->struct_mutex);
 218         }
 219         return ret;
 220 }
 221
 222 int i915_move(struct drm_buffer_object * bo,
 223               int evict, int no_wait, struct drm_bo_mem_reg * new_mem)
 224 {
 225         struct drm_bo_mem_reg *old_mem = &bo->mem;
 226
 227         if (old_mem->mem_type == DRM_BO_MEM_LOCAL) {
 228                 return drm_bo_move_memcpy(bo, evict, no_wait, new_mem);
 229         } else if (new_mem->mem_type == DRM_BO_MEM_LOCAL) {
 230                 if (i915_move_flip(bo, evict, no_wait, new_mem))
 231                         return drm_bo_move_memcpy(bo, evict, no_wait, new_mem);
 232         } else {
 233                 if (i915_move_blit(bo, evict, no_wait, new_mem))
 234                         return drm_bo_move_memcpy(bo, evict, no_wait, new_mem);
 235         }
 236         return 0;
 237 }