drivers/char/drm/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 #include "drm_sman.h"
  32
  33 #define VIA_MM_ALIGN_SHIFT 4
  34 #define VIA_MM_ALIGN_MASK ( (1 << VIA_MM_ALIGN_SHIFT) - 1)
  35
  36 int via_agp_init(struct drm_device *dev, void *data, struct drm_file *file_priv)
  37 {
  38         drm_via_agp_t *agp = data;
  39         drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
  40         int ret;
  41
  42         mutex_lock(&dev->struct_mutex);
  43         ret = drm_sman_set_range(&dev_priv->sman, VIA_MEM_AGP, 0,
  44                                  agp->size >> VIA_MM_ALIGN_SHIFT);
  45
  46         if (ret) {
  47                 DRM_ERROR("AGP memory manager initialisation error\n");
  48                 mutex_unlock(&dev->struct_mutex);
  49                 return ret;
  50         }
  51
  52         dev_priv->agp_initialized = 1;
  53         dev_priv->agp_offset = agp->offset;
  54         mutex_unlock(&dev->struct_mutex);
  55
  56         DRM_DEBUG("offset = %u, size = %u\n", agp->offset, agp->size);
  57         return 0;
  58 }
  59
  60 int via_fb_init(struct drm_device *dev, void *data, struct drm_file *file_priv)
  61 {
  62         drm_via_fb_t *fb = data;
  63         drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
  64         int ret;
  65
  66         mutex_lock(&dev->struct_mutex);
  67         ret = drm_sman_set_range(&dev_priv->sman, VIA_MEM_VIDEO, 0,
  68                                  fb->size >> VIA_MM_ALIGN_SHIFT);
  69
  70         if (ret) {
  71                 DRM_ERROR("VRAM memory manager initialisation error\n");
  72                 mutex_unlock(&dev->struct_mutex);
  73                 return ret;
  74         }
  75
  76         dev_priv->vram_initialized = 1;
  77         dev_priv->vram_offset = fb->offset;
  78
  79         mutex_unlock(&dev->struct_mutex);
  80         DRM_DEBUG("offset = %u, size = %u\n", fb->offset, fb->size);
  81
  82         return 0;
  83
  84 }
  85
  86 int via_final_context(struct drm_device *dev, int context)
  87 {
  88         drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
  89
  90         via_release_futex(dev_priv, context);
  91
  92         /* Linux specific until context tracking code gets ported to BSD */
  93         /* Last context, perform cleanup */
  94         if (dev->ctx_count == 1 && dev->dev_private) {
  95                 DRM_DEBUG("Last Context\n");
  96                 if (dev->irq)
  97                         drm_irq_uninstall(dev);
  98                 via_cleanup_futex(dev_priv);
  99                 via_do_cleanup_map(dev);
 100         }
 101         return 1;
 102 }
 103
 104 void via_lastclose(struct drm_device *dev)
 105 {
 106         drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
 107
 108         if (!dev_priv)
 109                 return;
 110
 111         mutex_lock(&dev->struct_mutex);
 112         drm_sman_cleanup(&dev_priv->sman);
 113         dev_priv->vram_initialized = 0;
 114         dev_priv->agp_initialized = 0;
 115         mutex_unlock(&dev->struct_mutex);
 116 }
 117
 118 int via_mem_alloc(struct drm_device *dev, void *data,
 119                   struct drm_file *file_priv)
 120 {
 121         drm_via_mem_t *mem = data;
 122         int retval = 0;
 123         struct drm_memblock_item *item;
 124         drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
 125         unsigned long tmpSize;
 126
 127         if (mem->type > VIA_MEM_AGP) {
 128                 DRM_ERROR("Unknown memory type allocation\n");
 129                 return -EINVAL;
 130         }
 131         mutex_lock(&dev->struct_mutex);
 132         if (0 == ((mem->type == VIA_MEM_VIDEO) ? dev_priv->vram_initialized :
 133                       dev_priv->agp_initialized)) {
 134                 DRM_ERROR
 135                     ("Attempt to allocate from uninitialized memory manager.\n");
 136                 mutex_unlock(&dev->struct_mutex);
 137                 return -EINVAL;
 138         }
 139
 140         tmpSize = (mem->size + VIA_MM_ALIGN_MASK) >> VIA_MM_ALIGN_SHIFT;
 141         item = drm_sman_alloc(&dev_priv->sman, mem->type, tmpSize, 0,
 142                               (unsigned long)file_priv);
 143         mutex_unlock(&dev->struct_mutex);
 144         if (item) {
 145                 mem->offset = ((mem->type == VIA_MEM_VIDEO) ?
 146                               dev_priv->vram_offset : dev_priv->agp_offset) +
 147                     (item->mm->
 148                      offset(item->mm, item->mm_info) << VIA_MM_ALIGN_SHIFT);
 149                 mem->index = item->user_hash.key;
 150         } else {
 151                 mem->offset = 0;
 152                 mem->size = 0;
 153                 mem->index = 0;
 154                 DRM_DEBUG("Video memory allocation failed\n");
 155                 retval = -ENOMEM;
 156         }
 157
 158         return retval;
 159 }
 160
 161 int via_mem_free(struct drm_device *dev, void *data, struct drm_file *file_priv)
 162 {
 163         drm_via_private_t *dev_priv = dev->dev_private;
 164         drm_via_mem_t *mem = data;
 165         int ret;
 166
 167         mutex_lock(&dev->struct_mutex);
 168         ret = drm_sman_free_key(&dev_priv->sman, mem->index);
 169         mutex_unlock(&dev->struct_mutex);
 170         DRM_DEBUG("free = 0x%lx\n", mem->index);
 171
 172         return ret;
 173 }
 174
 175
 176 void via_reclaim_buffers_locked(struct drm_device * dev,
 177                                 struct drm_file *file_priv)
 178 {
 179         drm_via_private_t *dev_priv = dev->dev_private;
 180
 181         mutex_lock(&dev->struct_mutex);
 182         if (drm_sman_owner_clean(&dev_priv->sman, (unsigned long)file_priv)) {
 183                 mutex_unlock(&dev->struct_mutex);
 184                 return;
 185         }
 186
 187         if (dev->driver->dma_quiescent) {
 188                 dev->driver->dma_quiescent(dev);
 189         }
 190
 191         drm_sman_owner_cleanup(&dev_priv->sman, (unsigned long)file_priv);
 192         mutex_unlock(&dev->struct_mutex);
 193         return;
 194 }