drivers/gpu/drm/via/via_mm.c

   1 /*
   2  * Copyright 2006 Tungsten Graphics Inc., Bismarck, ND., USA.
   3  * All rights reserved.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * the rights to use, copy, modify, merge, publish, distribute, sub license,
   9  * and/or sell copies of the Software, and to permit persons to whom the
  10  * Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice (including the
  13  * next paragraph) shall be included in all copies or substantial portions
  14  * of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
  20  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  21  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  22  * DEALINGS IN THE SOFTWARE.
  23  */
  24 /*
  25  * Authors: Thomas Hellström <thomas-at-tungstengraphics-dot-com>
  26  */
  27
  28 #include "drmP.h"
  29 #include "via_drm.h"
  30 #include "via_drv.h"
  31
  32 #define VIA_MM_ALIGN_SHIFT 4
  33 #define VIA_MM_ALIGN_MASK ((1 << VIA_MM_ALIGN_SHIFT) - 1)
  34
  35 struct via_memblock {
  36         struct drm_mm_node mm_node;
  37         struct list_head owner_list;
  38 };
  39
  40 int via_agp_init(struct drm_device *dev, void *data, struct drm_file *file_priv)
  41 {
  42         drm_via_agp_t *agp = data;
  43         drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
  44
  45         mutex_lock(&dev->struct_mutex);
  46         drm_mm_init(&dev_priv->agp_mm, 0, agp->size >> VIA_MM_ALIGN_SHIFT);
  47
  48         dev_priv->agp_initialized = 1;
  49         dev_priv->agp_offset = agp->offset;
  50         mutex_unlock(&dev->struct_mutex);
  51
  52         DRM_DEBUG("offset = %u, size = %u\n", agp->offset, agp->size);
  53         return 0;
  54 }
  55
  56 int via_fb_init(struct drm_device *dev, void *data, struct drm_file *file_priv)
  57 {
  58         drm_via_fb_t *fb = data;
  59         drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
  60
  61         mutex_lock(&dev->struct_mutex);
  62         drm_mm_init(&dev_priv->vram_mm, 0, fb->size >> VIA_MM_ALIGN_SHIFT);
  63
  64         dev_priv->vram_initialized = 1;
  65         dev_priv->vram_offset = fb->offset;
  66
  67         mutex_unlock(&dev->struct_mutex);
  68         DRM_DEBUG("offset = %u, size = %u\n", fb->offset, fb->size);
  69
  70         return 0;
  71
  72 }
  73
  74 int via_final_context(struct drm_device *dev, int context)
  75 {
  76         drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
  77
  78         via_release_futex(dev_priv, context);
  79
  80         /* Linux specific until context tracking code gets ported to BSD */
  81         /* Last context, perform cleanup */
  82         if (dev->ctx_count == 1 && dev->dev_private) {
  83                 DRM_DEBUG("Last Context\n");
  84                 drm_irq_uninstall(dev);
  85                 via_cleanup_futex(dev_priv);
  86                 via_do_cleanup_map(dev);
  87         }
  88         return 1;
  89 }
  90
  91 void via_lastclose(struct drm_device *dev)
  92 {
  93         drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
  94
  95         if (!dev_priv)
  96                 return;
  97
  98         mutex_lock(&dev->struct_mutex);
  99         if (dev_priv->vram_initialized) {
 100                 drm_mm_takedown(&dev_priv->vram_mm);
 101                 dev_priv->vram_initialized = 0;
 102         }
 103         if (dev_priv->agp_initialized) {
 104                 drm_mm_takedown(&dev_priv->agp_mm);
 105                 dev_priv->agp_initialized = 0;
 106         }
 107         mutex_unlock(&dev->struct_mutex);
 108 }
 109
 110 int via_mem_alloc(struct drm_device *dev, void *data,
 111                   struct drm_file *file)
 112 {
 113         drm_via_mem_t *mem = data;
 114         int retval = 0, user_key;
 115         struct via_memblock *item;
 116         drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
 117         struct via_file_private *file_priv = file->driver_priv;
 118         unsigned long tmpSize;
 119
 120         if (mem->type > VIA_MEM_AGP) {
 121                 DRM_ERROR("Unknown memory type allocation\n");
 122                 return -EINVAL;
 123         }
 124         mutex_lock(&dev->struct_mutex);
 125         if (0 == ((mem->type == VIA_MEM_VIDEO) ? dev_priv->vram_initialized :
 126                       dev_priv->agp_initialized)) {
 127                 DRM_ERROR
 128                     ("Attempt to allocate from uninitialized memory manager.\n");
 129                 mutex_unlock(&dev->struct_mutex);
 130                 return -EINVAL;
 131         }
 132
 133         item = kzalloc(sizeof(*item), GFP_KERNEL);
 134         if (!item) {
 135                 retval = -ENOMEM;
 136                 goto fail_alloc;
 137         }
 138
 139         tmpSize = (mem->size + VIA_MM_ALIGN_MASK) >> VIA_MM_ALIGN_SHIFT;
 140         if (mem->type == VIA_MEM_AGP)
 141                 retval = drm_mm_insert_node(&dev_priv->agp_mm,
 142                                             &item->mm_node,
 143                                             tmpSize, 0);
 144         else
 145                 retval = drm_mm_insert_node(&dev_priv->vram_mm,
 146                                             &item->mm_node,
 147                                             tmpSize, 0);
 148         if (retval)
 149                 goto fail_alloc;
 150
 151 again:
 152         if (idr_pre_get(&dev_priv->object_idr, GFP_KERNEL) == 0) {
 153                 retval = -ENOMEM;
 154                 goto fail_idr;
 155         }
 156
 157         retval = idr_get_new_above(&dev_priv->object_idr, item, 1, &user_key);
 158         if (retval == -EAGAIN)
 159                 goto again;
 160         if (retval)
 161                 goto fail_idr;
 162
 163         list_add(&item->owner_list, &file_priv->obj_list);
 164         mutex_unlock(&dev->struct_mutex);
 165
 166         mem->offset = ((mem->type == VIA_MEM_VIDEO) ?
 167                       dev_priv->vram_offset : dev_priv->agp_offset) +
 168             ((item->mm_node.start) << VIA_MM_ALIGN_SHIFT);
 169         mem->index = user_key;
 170
 171         return 0;
 172
 173 fail_idr:
 174         drm_mm_remove_node(&item->mm_node);
 175 fail_alloc:
 176         kfree(item);
 177         mutex_unlock(&dev->struct_mutex);
 178
 179         mem->offset = 0;
 180         mem->size = 0;
 181         mem->index = 0;
 182         DRM_DEBUG("Video memory allocation failed\n");
 183
 184         return retval;
 185 }
 186
 187 int via_mem_free(struct drm_device *dev, void *data, struct drm_file *file_priv)
 188 {
 189         drm_via_private_t *dev_priv = dev->dev_private;
 190         drm_via_mem_t *mem = data;
 191         struct via_memblock *obj;
 192
 193         mutex_lock(&dev->struct_mutex);
 194         obj = idr_find(&dev_priv->object_idr, mem->index);
 195         if (obj == NULL) {
 196                 mutex_unlock(&dev->struct_mutex);
 197                 return -EINVAL;
 198         }
 199
 200         idr_remove(&dev_priv->object_idr, mem->index);
 201         list_del(&obj->owner_list);
 202         drm_mm_remove_node(&obj->mm_node);
 203         kfree(obj);
 204         mutex_unlock(&dev->struct_mutex);
 205
 206         DRM_DEBUG("free = 0x%lx\n", mem->index);
 207
 208         return 0;
 209 }
 210
 211
 212 void via_reclaim_buffers_locked(struct drm_device *dev,
 213                                 struct drm_file *file)
 214 {
 215         struct via_file_private *file_priv = file->driver_priv;
 216         struct via_memblock *entry, *next;
 217
 218         mutex_lock(&dev->struct_mutex);
 219         if (list_empty(&file_priv->obj_list)) {
 220                 mutex_unlock(&dev->struct_mutex);
 221                 return;
 222         }
 223
 224         if (dev->driver->dma_quiescent)
 225                 dev->driver->dma_quiescent(dev);
 226
 227         list_for_each_entry_safe(entry, next, &file_priv->obj_list,
 228                                  owner_list) {
 229                 list_del(&entry->owner_list);
 230                 drm_mm_remove_node(&entry->mm_node);
 231                 kfree(entry);
 232         }
 233         mutex_unlock(&dev->struct_mutex);
 234         return;
 235 }