SAFE public projects git trees. - safe/jmp/linux-2.6/blob - drivers/char/drm/sis_mm.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 above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  21  * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
  22  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  23  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  24  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  *
  27  **************************************************************************/
  28
  29 /*
  30  * Authors:
  31  *    Thomas Hellström <thomas-at-tungstengraphics-dot-com>
  32  */
  33
  34 #include "drmP.h"
  35 #include "sis_drm.h"
  36 #include "sis_drv.h"
  37
  38 #include <video/sisfb.h>
  39
  40 #define VIDEO_TYPE 0
  41 #define AGP_TYPE 1
  42
  43 #define SIS_MM_ALIGN_SHIFT 4
  44 #define SIS_MM_ALIGN_MASK ( (1 << SIS_MM_ALIGN_SHIFT) - 1)
  45
  46 #if defined(CONFIG_FB_SIS)
  47 /* fb management via fb device */
  48
  49 #define SIS_MM_ALIGN_SHIFT 0
  50 #define SIS_MM_ALIGN_MASK 0
  51
  52 static void *sis_sman_mm_allocate(void *private, unsigned long size,
  53                                   unsigned alignment)
  54 {
  55         struct sis_memreq req;
  56
  57         req.size = size;
  58         sis_malloc(&req);
  59         if (req.size == 0)
  60                 return NULL;
  61         else
  62                 return (void *)~req.offset;
  63 }
  64
  65 static void sis_sman_mm_free(void *private, void *ref)
  66 {
  67         sis_free(~((unsigned long)ref));
  68 }
  69
  70 static void sis_sman_mm_destroy(void *private)
  71 {
  72         ;
  73 }
  74
  75 unsigned long sis_sman_mm_offset(void *private, void *ref)
  76 {
  77         return ~((unsigned long)ref);
  78 }
  79
  80 #endif
  81
  82 static int sis_fb_init(DRM_IOCTL_ARGS)
  83 {
  84         DRM_DEVICE;
  85         drm_sis_private_t *dev_priv = dev->dev_private;
  86         drm_sis_fb_t fb;
  87         int ret;
  88
  89         DRM_COPY_FROM_USER_IOCTL(fb, (drm_sis_fb_t __user *) data, sizeof(fb));
  90
  91         mutex_lock(&dev->struct_mutex);
  92 #if defined(CONFIG_FB_SIS)
  93         {
  94                 drm_sman_mm_t sman_mm;
  95                 sman_mm.private = (void *)0xFFFFFFFF;
  96                 sman_mm.allocate = sis_sman_mm_allocate;
  97                 sman_mm.free = sis_sman_mm_free;
  98                 sman_mm.destroy = sis_sman_mm_destroy;
  99                 sman_mm.offset = sis_sman_mm_offset;
 100                 ret =
 101                     drm_sman_set_manager(&dev_priv->sman, VIDEO_TYPE, &sman_mm);
 102         }
 103 #else
 104         ret = drm_sman_set_range(&dev_priv->sman, VIDEO_TYPE, 0,
 105                                  fb.size >> SIS_MM_ALIGN_SHIFT);
 106 #endif
 107
 108         if (ret) {
 109                 DRM_ERROR("VRAM memory manager initialisation error\n");
 110                 mutex_unlock(&dev->struct_mutex);
 111                 return ret;
 112         }
 113
 114         dev_priv->vram_initialized = TRUE;
 115         dev_priv->vram_offset = fb.offset;
 116
 117         mutex_unlock(&dev->struct_mutex);
 118         DRM_DEBUG("offset = %u, size = %u", fb.offset, fb.size);
 119
 120         return 0;
 121 }
 122
 123 static int sis_drm_alloc(drm_device_t * dev, drm_file_t * priv,
 124                          unsigned long data, int pool)
 125 {
 126         drm_sis_private_t *dev_priv = dev->dev_private;
 127         drm_sis_mem_t __user *argp = (drm_sis_mem_t __user *) data;
 128         drm_sis_mem_t mem;
 129         int retval = 0;
 130         drm_memblock_item_t *item;
 131
 132         DRM_COPY_FROM_USER_IOCTL(mem, argp, sizeof(mem));
 133
 134         mutex_lock(&dev->struct_mutex);
 135
 136         if (FALSE == ((pool == 0) ? dev_priv->vram_initialized :
 137                       dev_priv->agp_initialized)) {
 138                 DRM_ERROR
 139                     ("Attempt to allocate from uninitialized memory manager.\n");
 140                 return DRM_ERR(EINVAL);
 141         }
 142
 143         mem.size = (mem.size + SIS_MM_ALIGN_MASK) >> SIS_MM_ALIGN_SHIFT;
 144         item = drm_sman_alloc(&dev_priv->sman, pool, mem.size, 0,
 145                               (unsigned long)priv);
 146
 147         mutex_unlock(&dev->struct_mutex);
 148         if (item) {
 149                 mem.offset = ((pool == 0) ?
 150                               dev_priv->vram_offset : dev_priv->agp_offset) +
 151                     (item->mm->
 152                      offset(item->mm, item->mm_info) << SIS_MM_ALIGN_SHIFT);
 153                 mem.free = item->user_hash.key;
 154                 mem.size = mem.size << SIS_MM_ALIGN_SHIFT;
 155         } else {
 156                 mem.offset = 0;
 157                 mem.size = 0;
 158                 mem.free = 0;
 159                 retval = DRM_ERR(ENOMEM);
 160         }
 161
 162         DRM_COPY_TO_USER_IOCTL(argp, mem, sizeof(mem));
 163
 164         DRM_DEBUG("alloc %d, size = %d, offset = %d\n", pool, mem.size,
 165                   mem.offset);
 166
 167         return retval;
 168 }
 169
 170 static int sis_drm_free(DRM_IOCTL_ARGS)
 171 {
 172         DRM_DEVICE;
 173         drm_sis_private_t *dev_priv = dev->dev_private;
 174         drm_sis_mem_t mem;
 175         int ret;
 176
 177         DRM_COPY_FROM_USER_IOCTL(mem, (drm_sis_mem_t __user *) data,
 178                                  sizeof(mem));
 179
 180         mutex_lock(&dev->struct_mutex);
 181         ret = drm_sman_free_key(&dev_priv->sman, mem.free);
 182         mutex_unlock(&dev->struct_mutex);
 183         DRM_DEBUG("free = 0x%lx\n", mem.free);
 184
 185         return ret;
 186 }
 187
 188 static int sis_fb_alloc(DRM_IOCTL_ARGS)
 189 {
 190         DRM_DEVICE;
 191         return sis_drm_alloc(dev, priv, data, VIDEO_TYPE);
 192 }
 193
 194 static int sis_ioctl_agp_init(DRM_IOCTL_ARGS)
 195 {
 196         DRM_DEVICE;
 197         drm_sis_private_t *dev_priv = dev->dev_private;
 198         drm_sis_agp_t agp;
 199         int ret;
 200         dev_priv = dev->dev_private;
 201
 202         DRM_COPY_FROM_USER_IOCTL(agp, (drm_sis_agp_t __user *) data,
 203                                  sizeof(agp));
 204         mutex_lock(&dev->struct_mutex);
 205         ret = drm_sman_set_range(&dev_priv->sman, AGP_TYPE, 0,
 206                                  agp.size >> SIS_MM_ALIGN_SHIFT);
 207
 208         if (ret) {
 209                 DRM_ERROR("AGP memory manager initialisation error\n");
 210                 mutex_unlock(&dev->struct_mutex);
 211                 return ret;
 212         }
 213
 214         dev_priv->agp_initialized = TRUE;
 215         dev_priv->agp_offset = agp.offset;
 216         mutex_unlock(&dev->struct_mutex);
 217
 218         DRM_DEBUG("offset = %u, size = %u", agp.offset, agp.size);
 219         return 0;
 220 }
 221
 222 static int sis_ioctl_agp_alloc(DRM_IOCTL_ARGS)
 223 {
 224         DRM_DEVICE;
 225
 226         return sis_drm_alloc(dev, priv, data, AGP_TYPE);
 227 }
 228
 229 void sis_lastclose(struct drm_device *dev)
 230 {
 231         drm_sis_private_t *dev_priv = dev->dev_private;
 232
 233         if (!dev_priv)
 234                 return;
 235
 236         mutex_lock(&dev->struct_mutex);
 237         drm_sman_cleanup(&dev_priv->sman);
 238         dev_priv->vram_initialized = FALSE;
 239         dev_priv->agp_initialized = FALSE;
 240         mutex_unlock(&dev->struct_mutex);
 241 }
 242
 243 void sis_reclaim_buffers_locked(drm_device_t * dev, struct file *filp)
 244 {
 245         drm_sis_private_t *dev_priv = dev->dev_private;
 246         drm_file_t *priv = filp->private_data;
 247
 248         mutex_lock(&dev->struct_mutex);
 249         if (drm_sman_owner_clean(&dev_priv->sman, (unsigned long)priv)) {
 250                 mutex_unlock(&dev->struct_mutex);
 251                 return;
 252         }
 253
 254         if (dev->driver->dma_quiescent) {
 255                 dev->driver->dma_quiescent(dev);
 256         }
 257
 258         drm_sman_owner_cleanup(&dev_priv->sman, (unsigned long)priv);
 259         mutex_unlock(&dev->struct_mutex);
 260         return;
 261 }
 262
 263 drm_ioctl_desc_t sis_ioctls[] = {
 264         [DRM_IOCTL_NR(DRM_SIS_FB_ALLOC)] = {sis_fb_alloc, DRM_AUTH},
 265         [DRM_IOCTL_NR(DRM_SIS_FB_FREE)] = {sis_drm_free, DRM_AUTH},
 266         [DRM_IOCTL_NR(DRM_SIS_AGP_INIT)] =
 267             {sis_ioctl_agp_init, DRM_AUTH | DRM_MASTER | DRM_ROOT_ONLY},
 268         [DRM_IOCTL_NR(DRM_SIS_AGP_ALLOC)] = {sis_ioctl_agp_alloc, DRM_AUTH},
 269         [DRM_IOCTL_NR(DRM_SIS_AGP_FREE)] = {sis_drm_free, DRM_AUTH},
 270         [DRM_IOCTL_NR(DRM_SIS_FB_INIT)] =
 271             {sis_fb_init, DRM_AUTH | DRM_MASTER | DRM_ROOT_ONLY}
 272 };
 273
 274 int sis_max_ioctl = DRM_ARRAY_SIZE(sis_ioctls);