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
  44 #if defined(CONFIG_FB_SIS)
  45 /* fb management via fb device */
  46
  47 #define SIS_MM_ALIGN_SHIFT 0
  48 #define SIS_MM_ALIGN_MASK 0
  49
  50 static void *sis_sman_mm_allocate(void *private, unsigned long size,
  51                                   unsigned alignment)
  52 {
  53         struct sis_memreq req;
  54
  55         req.size = size;
  56         sis_malloc(&req);
  57         if (req.size == 0)
  58                 return NULL;
  59         else
  60                 return (void *)~req.offset;
  61 }
  62
  63 static void sis_sman_mm_free(void *private, void *ref)
  64 {
  65         sis_free(~((unsigned long)ref));
  66 }
  67
  68 static void sis_sman_mm_destroy(void *private)
  69 {
  70         ;
  71 }
  72
  73 static unsigned long sis_sman_mm_offset(void *private, void *ref)
  74 {
  75         return ~((unsigned long)ref);
  76 }
  77
  78 #else /* CONFIG_FB_SIS */
  79
  80 #define SIS_MM_ALIGN_SHIFT 4
  81 #define SIS_MM_ALIGN_MASK ( (1 << SIS_MM_ALIGN_SHIFT) - 1)
  82
  83 #endif /* CONFIG_FB_SIS */
  84
  85 static int sis_fb_init(struct drm_device *dev, void *data, struct drm_file *file_priv)
  86 {
  87         drm_sis_private_t *dev_priv = dev->dev_private;
  88         drm_sis_fb_t *fb = data;
  89         int ret;
  90
  91         mutex_lock(&dev->struct_mutex);
  92 #if defined(CONFIG_FB_SIS)
  93         {
  94                 struct drm_sman_mm 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 = 1;
 115         dev_priv->vram_offset = fb->offset;
 116
 117         mutex_unlock(&dev->struct_mutex);
 118         DRM_DEBUG("offset = %u, size = %u\n", fb->offset, fb->size);
 119
 120         return 0;
 121 }
 122
 123 static int sis_drm_alloc(struct drm_device *dev, struct drm_file *file_priv,
 124                          void *data, int pool)
 125 {
 126         drm_sis_private_t *dev_priv = dev->dev_private;
 127         drm_sis_mem_t *mem = data;
 128         int retval = 0;
 129         struct drm_memblock_item *item;
 130
 131         mutex_lock(&dev->struct_mutex);
 132
 133         if (0 == ((pool == 0) ? dev_priv->vram_initialized :
 134                       dev_priv->agp_initialized)) {
 135                 DRM_ERROR
 136                     ("Attempt to allocate from uninitialized memory manager.\n");
 137                 mutex_unlock(&dev->struct_mutex);
 138                 return -EINVAL;
 139         }
 140
 141         mem->size = (mem->size + SIS_MM_ALIGN_MASK) >> SIS_MM_ALIGN_SHIFT;
 142         item = drm_sman_alloc(&dev_priv->sman, pool, mem->size, 0,
 143                               (unsigned long)file_priv);
 144
 145         mutex_unlock(&dev->struct_mutex);
 146         if (item) {
 147                 mem->offset = ((pool == 0) ?
 148                               dev_priv->vram_offset : dev_priv->agp_offset) +
 149                     (item->mm->
 150                      offset(item->mm, item->mm_info) << SIS_MM_ALIGN_SHIFT);
 151                 mem->free = item->user_hash.key;
 152                 mem->size = mem->size << SIS_MM_ALIGN_SHIFT;
 153         } else {
 154                 mem->offset = 0;
 155                 mem->size = 0;
 156                 mem->free = 0;
 157                 retval = -ENOMEM;
 158         }
 159
 160         DRM_DEBUG("alloc %d, size = %d, offset = %d\n", pool, mem->size,
 161                   mem->offset);
 162
 163         return retval;
 164 }
 165
 166 static int sis_drm_free(struct drm_device *dev, void *data, struct drm_file *file_priv)
 167 {
 168         drm_sis_private_t *dev_priv = dev->dev_private;
 169         drm_sis_mem_t *mem = data;
 170         int ret;
 171
 172         mutex_lock(&dev->struct_mutex);
 173         ret = drm_sman_free_key(&dev_priv->sman, mem->free);
 174         mutex_unlock(&dev->struct_mutex);
 175         DRM_DEBUG("free = 0x%lx\n", mem->free);
 176
 177         return ret;
 178 }
 179
 180 static int sis_fb_alloc(struct drm_device *dev, void *data,
 181                         struct drm_file *file_priv)
 182 {
 183         return sis_drm_alloc(dev, file_priv, data, VIDEO_TYPE);
 184 }
 185
 186 static int sis_ioctl_agp_init(struct drm_device *dev, void *data,
 187                               struct drm_file *file_priv)
 188 {
 189         drm_sis_private_t *dev_priv = dev->dev_private;
 190         drm_sis_agp_t *agp = data;
 191         int ret;
 192         dev_priv = dev->dev_private;
 193
 194         mutex_lock(&dev->struct_mutex);
 195         ret = drm_sman_set_range(&dev_priv->sman, AGP_TYPE, 0,
 196                                  agp->size >> SIS_MM_ALIGN_SHIFT);
 197
 198         if (ret) {
 199                 DRM_ERROR("AGP memory manager initialisation error\n");
 200                 mutex_unlock(&dev->struct_mutex);
 201                 return ret;
 202         }
 203
 204         dev_priv->agp_initialized = 1;
 205         dev_priv->agp_offset = agp->offset;
 206         mutex_unlock(&dev->struct_mutex);
 207
 208         DRM_DEBUG("offset = %u, size = %u\n", agp->offset, agp->size);
 209         return 0;
 210 }
 211
 212 static int sis_ioctl_agp_alloc(struct drm_device *dev, void *data,
 213                                struct drm_file *file_priv)
 214 {
 215
 216         return sis_drm_alloc(dev, file_priv, data, AGP_TYPE);
 217 }
 218
 219 static drm_local_map_t *sis_reg_init(struct drm_device *dev)
 220 {
 221         struct drm_map_list *entry;
 222         drm_local_map_t *map;
 223
 224         list_for_each_entry(entry, &dev->maplist, head) {
 225                 map = entry->map;
 226                 if (!map)
 227                         continue;
 228                 if (map->type == _DRM_REGISTERS) {
 229                         return map;
 230                 }
 231         }
 232         return NULL;
 233 }
 234
 235 int sis_idle(struct drm_device *dev)
 236 {
 237         drm_sis_private_t *dev_priv = dev->dev_private;
 238         uint32_t idle_reg;
 239         unsigned long end;
 240         int i;
 241
 242         if (dev_priv->idle_fault)
 243                 return 0;
 244
 245         if (dev_priv->mmio == NULL) {
 246                 dev_priv->mmio = sis_reg_init(dev);
 247                 if (dev_priv->mmio == NULL) {
 248                         DRM_ERROR("Could not find register map.\n");
 249                         return 0;
 250                 }
 251         }
 252
 253         /*
 254          * Implement a device switch here if needed
 255          */
 256
 257         if (dev_priv->chipset != SIS_CHIP_315)
 258                 return 0;
 259
 260         /*
 261          * Timeout after 3 seconds. We cannot use DRM_WAIT_ON here
 262          * because its polling frequency is too low.
 263          */
 264
 265         end = jiffies + (DRM_HZ * 3);
 266
 267         for (i=0; i<4; ++i) {
 268                 do {
 269                         idle_reg = SIS_READ(0x85cc);
 270                 } while ( !time_after_eq(jiffies, end) &&
 271                           ((idle_reg & 0x80000000) != 0x80000000));
 272         }
 273
 274         if (time_after_eq(jiffies, end)) {
 275                 DRM_ERROR("Graphics engine idle timeout. "
 276                           "Disabling idle check\n");
 277                 dev_priv->idle_fault = 1;
 278         }
 279
 280         /*
 281          * The caller never sees an error code. It gets trapped
 282          * in libdrm.
 283          */
 284
 285         return 0;
 286 }
 287
 288
 289 void sis_lastclose(struct drm_device *dev)
 290 {
 291         drm_sis_private_t *dev_priv = dev->dev_private;
 292
 293         if (!dev_priv)
 294                 return;
 295
 296         mutex_lock(&dev->struct_mutex);
 297         drm_sman_cleanup(&dev_priv->sman);
 298         dev_priv->vram_initialized = 0;
 299         dev_priv->agp_initialized = 0;
 300         dev_priv->mmio = NULL;
 301         mutex_unlock(&dev->struct_mutex);
 302 }
 303
 304 void sis_reclaim_buffers_locked(struct drm_device * dev,
 305                                 struct drm_file *file_priv)
 306 {
 307         drm_sis_private_t *dev_priv = dev->dev_private;
 308
 309         mutex_lock(&dev->struct_mutex);
 310         if (drm_sman_owner_clean(&dev_priv->sman, (unsigned long)file_priv)) {
 311                 mutex_unlock(&dev->struct_mutex);
 312                 return;
 313         }
 314
 315         if (dev->driver->dma_quiescent) {
 316                 dev->driver->dma_quiescent(dev);
 317         }
 318
 319         drm_sman_owner_cleanup(&dev_priv->sman, (unsigned long)file_priv);
 320         mutex_unlock(&dev->struct_mutex);
 321         return;
 322 }
 323
 324 struct drm_ioctl_desc sis_ioctls[] = {
 325         DRM_IOCTL_DEF(DRM_SIS_FB_ALLOC, sis_fb_alloc, DRM_AUTH),
 326         DRM_IOCTL_DEF(DRM_SIS_FB_FREE, sis_drm_free, DRM_AUTH),
 327         DRM_IOCTL_DEF(DRM_SIS_AGP_INIT, sis_ioctl_agp_init, DRM_AUTH | DRM_MASTER | DRM_ROOT_ONLY),
 328         DRM_IOCTL_DEF(DRM_SIS_AGP_ALLOC, sis_ioctl_agp_alloc, DRM_AUTH),
 329         DRM_IOCTL_DEF(DRM_SIS_AGP_FREE, sis_drm_free, DRM_AUTH),
 330         DRM_IOCTL_DEF(DRM_SIS_FB_INIT, sis_fb_init, DRM_AUTH | DRM_MASTER | DRM_ROOT_ONLY),
 331 };
 332
 333 int sis_max_ioctl = DRM_ARRAY_SIZE(sis_ioctls);