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(DRM_IOCTL_ARGS)
  37 {
  38         DRM_DEVICE;
  39         drm_via_agp_t agp;
  40         drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
  41         int ret;
  42
  43         DRM_COPY_FROM_USER_IOCTL(agp, (drm_via_agp_t __user *) data,
  44                                  sizeof(agp));
  45         mutex_lock(&dev->struct_mutex);
  46         ret = drm_sman_set_range(&dev_priv->sman, VIA_MEM_AGP, 0,
  47                                  agp.size >> VIA_MM_ALIGN_SHIFT);
  48
  49         if (ret) {
  50                 DRM_ERROR("AGP memory manager initialisation error\n");
  51                 mutex_unlock(&dev->struct_mutex);
  52                 return ret;
  53         }
  54
  55         dev_priv->agp_initialized = 1;
  56         dev_priv->agp_offset = agp.offset;
  57         mutex_unlock(&dev->struct_mutex);
  58
  59         DRM_DEBUG("offset = %u, size = %u", agp.offset, agp.size);
  60         return 0;
  61 }
  62
  63 int via_fb_init(DRM_IOCTL_ARGS)
  64 {
  65         DRM_DEVICE;
  66         drm_via_fb_t fb;
  67         drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
  68         int ret;
  69
  70         DRM_COPY_FROM_USER_IOCTL(fb, (drm_via_fb_t __user *) data, sizeof(fb));
  71
  72         mutex_lock(&dev->struct_mutex);
  73         ret = drm_sman_set_range(&dev_priv->sman, VIA_MEM_VIDEO, 0,
  74                                  fb.size >> VIA_MM_ALIGN_SHIFT);
  75
  76         if (ret) {
  77                 DRM_ERROR("VRAM memory manager initialisation error\n");
  78                 mutex_unlock(&dev->struct_mutex);
  79                 return ret;
  80         }
  81
  82         dev_priv->vram_initialized = 1;
  83         dev_priv->vram_offset = fb.offset;
  84
  85         mutex_unlock(&dev->struct_mutex);
  86         DRM_DEBUG("offset = %u, size = %u", fb.offset, fb.size);
  87
  88         return 0;
  89
  90 }
  91
  92 int via_final_context(struct drm_device *dev, int context)
  93 {
  94         drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
  95
  96         via_release_futex(dev_priv, context);
  97
  98         /* Linux specific until context tracking code gets ported to BSD */
  99         /* Last context, perform cleanup */
 100         if (dev->ctx_count == 1 && dev->dev_private) {
 101                 DRM_DEBUG("Last Context\n");
 102                 if (dev->irq)
 103                         drm_irq_uninstall(dev);
 104                 via_cleanup_futex(dev_priv);
 105                 via_do_cleanup_map(dev);
 106         }
 107         return 1;
 108 }
 109
 110 void via_lastclose(struct drm_device *dev)
 111 {
 112         drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
 113
 114         if (!dev_priv)
 115                 return;
 116
 117         mutex_lock(&dev->struct_mutex);
 118         drm_sman_cleanup(&dev_priv->sman);
 119         dev_priv->vram_initialized = 0;
 120         dev_priv->agp_initialized = 0;
 121         mutex_unlock(&dev->struct_mutex);
 122 }
 123
 124 int via_mem_alloc(DRM_IOCTL_ARGS)
 125 {
 126         DRM_DEVICE;
 127
 128         drm_via_mem_t mem;
 129         int retval = 0;
 130         drm_memblock_item_t *item;
 131         drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
 132         unsigned long tmpSize;
 133
 134         DRM_COPY_FROM_USER_IOCTL(mem, (drm_via_mem_t __user *) data,
 135                                  sizeof(mem));
 136
 137         if (mem.type > VIA_MEM_AGP) {
 138                 DRM_ERROR("Unknown memory type allocation\n");
 139                 return DRM_ERR(EINVAL);
 140         }
 141         mutex_lock(&dev->struct_mutex);
 142         if (0 == ((mem.type == VIA_MEM_VIDEO) ? dev_priv->vram_initialized :
 143                       dev_priv->agp_initialized)) {
 144                 DRM_ERROR
 145                     ("Attempt to allocate from uninitialized memory manager.\n");
 146                 mutex_unlock(&dev->struct_mutex);
 147                 return DRM_ERR(EINVAL);
 148         }
 149
 150         tmpSize = (mem.size + VIA_MM_ALIGN_MASK) >> VIA_MM_ALIGN_SHIFT;
 151         item = drm_sman_alloc(&dev_priv->sman, mem.type, tmpSize, 0,
 152                               (unsigned long)priv);
 153         mutex_unlock(&dev->struct_mutex);
 154         if (item) {
 155                 mem.offset = ((mem.type == VIA_MEM_VIDEO) ?
 156                               dev_priv->vram_offset : dev_priv->agp_offset) +
 157                     (item->mm->
 158                      offset(item->mm, item->mm_info) << VIA_MM_ALIGN_SHIFT);
 159                 mem.index = item->user_hash.key;
 160         } else {
 161                 mem.offset = 0;
 162                 mem.size = 0;
 163                 mem.index = 0;
 164                 DRM_DEBUG("Video memory allocation failed\n");
 165                 retval = DRM_ERR(ENOMEM);
 166         }
 167         DRM_COPY_TO_USER_IOCTL((drm_via_mem_t __user *) data, mem, sizeof(mem));
 168
 169         return retval;
 170 }
 171
 172 int via_mem_free(DRM_IOCTL_ARGS)
 173 {
 174         DRM_DEVICE;
 175         drm_via_private_t *dev_priv = dev->dev_private;
 176         drm_via_mem_t mem;
 177         int ret;
 178
 179         DRM_COPY_FROM_USER_IOCTL(mem, (drm_via_mem_t __user *) data,
 180                                  sizeof(mem));
 181
 182         mutex_lock(&dev->struct_mutex);
 183         ret = drm_sman_free_key(&dev_priv->sman, mem.index);
 184         mutex_unlock(&dev->struct_mutex);
 185         DRM_DEBUG("free = 0x%lx\n", mem.index);
 186
 187         return ret;
 188 }
 189
 190
 191 void via_reclaim_buffers_locked(drm_device_t * dev, struct file *filp)
 192 {
 193         drm_via_private_t *dev_priv = dev->dev_private;
 194         drm_file_t *priv = filp->private_data;
 195
 196         mutex_lock(&dev->struct_mutex);
 197         if (drm_sman_owner_clean(&dev_priv->sman, (unsigned long)priv)) {
 198                 mutex_unlock(&dev->struct_mutex);
 199                 return;
 200         }
 201
 202         if (dev->driver->dma_quiescent) {
 203                 dev->driver->dma_quiescent(dev);
 204         }
 205
 206         drm_sman_owner_cleanup(&dev_priv->sman, (unsigned long)priv);
 207         mutex_unlock(&dev->struct_mutex);
 208         return;
 209 }