drivers/gpu/drm/sis/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 <video/sisfb.h>
  35
  36 #include <drm/drm_device.h>
  37 #include <drm/drm_file.h>
  38 #include <drm/sis_drm.h>
  39
  40 #include "sis_drv.h"
  41
  42
  43 #define VIDEO_TYPE 0
  44 #define AGP_TYPE 1
  45
  46
  47 struct sis_memblock {
  48         struct drm_mm_node mm_node;
  49         struct sis_memreq req;
  50         struct list_head owner_list;
  51 };
  52
  53 #if defined(CONFIG_FB_SIS) || defined(CONFIG_FB_SIS_MODULE)
  54 /* fb management via fb device */
  55
  56 #define SIS_MM_ALIGN_SHIFT 0
  57 #define SIS_MM_ALIGN_MASK 0
  58
  59 #else /* CONFIG_FB_SIS[_MODULE] */
  60
  61 #define SIS_MM_ALIGN_SHIFT 4
  62 #define SIS_MM_ALIGN_MASK ((1 << SIS_MM_ALIGN_SHIFT) - 1)
  63
  64 #endif /* CONFIG_FB_SIS[_MODULE] */
  65
  66 static int sis_fb_init(struct drm_device *dev, void *data, struct drm_file *file_priv)
  67 {
  68         drm_sis_private_t *dev_priv = dev->dev_private;
  69         drm_sis_fb_t *fb = data;
  70
  71         mutex_lock(&dev->struct_mutex);
  72         /* Unconditionally init the drm_mm, even though we don't use it when the
  73          * fb sis driver is available - make cleanup easier. */
  74         drm_mm_init(&dev_priv->vram_mm, 0, fb->size >> SIS_MM_ALIGN_SHIFT);
  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 = %lu, size = %lu\n", fb->offset, fb->size);
  81
  82         return 0;
  83 }
  84
  85 static int sis_drm_alloc(struct drm_device *dev, struct drm_file *file,
  86                          void *data, int pool)
  87 {
  88         drm_sis_private_t *dev_priv = dev->dev_private;
  89         drm_sis_mem_t *mem = data;
  90         int retval = 0, user_key;
  91         struct sis_memblock *item;
  92         struct sis_file_private *file_priv = file->driver_priv;
  93         unsigned long offset;
  94
  95         mutex_lock(&dev->struct_mutex);
  96
  97         if (0 == ((pool == 0) ? dev_priv->vram_initialized :
  98                       dev_priv->agp_initialized)) {
  99                 DRM_ERROR
 100                     ("Attempt to allocate from uninitialized memory manager.\n");
 101                 mutex_unlock(&dev->struct_mutex);
 102                 return -EINVAL;
 103         }
 104
 105         item = kzalloc(sizeof(*item), GFP_KERNEL);
 106         if (!item) {
 107                 retval = -ENOMEM;
 108                 goto fail_alloc;
 109         }
 110
 111         mem->size = (mem->size + SIS_MM_ALIGN_MASK) >> SIS_MM_ALIGN_SHIFT;
 112         if (pool == AGP_TYPE) {
 113                 retval = drm_mm_insert_node(&dev_priv->agp_mm,
 114                                             &item->mm_node,
 115                                             mem->size);
 116                 offset = item->mm_node.start;
 117         } else {
 118 #if defined(CONFIG_FB_SIS) || defined(CONFIG_FB_SIS_MODULE)
 119                 item->req.size = mem->size;
 120                 sis_malloc(&item->req);
 121                 if (item->req.size == 0)
 122                         retval = -ENOMEM;
 123                 offset = item->req.offset;
 124 #else
 125                 retval = drm_mm_insert_node(&dev_priv->vram_mm,
 126                                             &item->mm_node,
 127                                             mem->size);
 128                 offset = item->mm_node.start;
 129 #endif
 130         }
 131         if (retval)
 132                 goto fail_alloc;
 133
 134         retval = idr_alloc(&dev_priv->object_idr, item, 1, 0, GFP_KERNEL);
 135         if (retval < 0)
 136                 goto fail_idr;
 137         user_key = retval;
 138
 139         list_add(&item->owner_list, &file_priv->obj_list);
 140         mutex_unlock(&dev->struct_mutex);
 141
 142         mem->offset = ((pool == 0) ?
 143                       dev_priv->vram_offset : dev_priv->agp_offset) +
 144             (offset << SIS_MM_ALIGN_SHIFT);
 145         mem->free = user_key;
 146         mem->size = mem->size << SIS_MM_ALIGN_SHIFT;
 147
 148         return 0;
 149
 150 fail_idr:
 151         drm_mm_remove_node(&item->mm_node);
 152 fail_alloc:
 153         kfree(item);
 154         mutex_unlock(&dev->struct_mutex);
 155
 156         mem->offset = 0;
 157         mem->size = 0;
 158         mem->free = 0;
 159
 160         DRM_DEBUG("alloc %d, size = %ld, offset = %ld\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         struct sis_memblock *obj;
 171
 172         mutex_lock(&dev->struct_mutex);
 173         obj = idr_find(&dev_priv->object_idr, mem->free);
 174         if (obj == NULL) {
 175                 mutex_unlock(&dev->struct_mutex);
 176                 return -EINVAL;
 177         }
 178
 179         idr_remove(&dev_priv->object_idr, mem->free);
 180         list_del(&obj->owner_list);
 181         if (drm_mm_node_allocated(&obj->mm_node))
 182                 drm_mm_remove_node(&obj->mm_node);
 183 #if defined(CONFIG_FB_SIS) || defined(CONFIG_FB_SIS_MODULE)
 184         else
 185                 sis_free(obj->req.offset);
 186 #endif
 187         kfree(obj);
 188         mutex_unlock(&dev->struct_mutex);
 189         DRM_DEBUG("free = 0x%lx\n", mem->free);
 190
 191         return 0;
 192 }
 193
 194 static int sis_fb_alloc(struct drm_device *dev, void *data,
 195                         struct drm_file *file_priv)
 196 {
 197         return sis_drm_alloc(dev, file_priv, data, VIDEO_TYPE);
 198 }
 199
 200 static int sis_ioctl_agp_init(struct drm_device *dev, void *data,
 201                               struct drm_file *file_priv)
 202 {
 203         drm_sis_private_t *dev_priv = dev->dev_private;
 204         drm_sis_agp_t *agp = data;
 205         dev_priv = dev->dev_private;
 206
 207         mutex_lock(&dev->struct_mutex);
 208         drm_mm_init(&dev_priv->agp_mm, 0, agp->size >> SIS_MM_ALIGN_SHIFT);
 209
 210         dev_priv->agp_initialized = 1;
 211         dev_priv->agp_offset = agp->offset;
 212         mutex_unlock(&dev->struct_mutex);
 213
 214         DRM_DEBUG("offset = %lu, size = %lu\n", agp->offset, agp->size);
 215         return 0;
 216 }
 217
 218 static int sis_ioctl_agp_alloc(struct drm_device *dev, void *data,
 219                                struct drm_file *file_priv)
 220 {
 221
 222         return sis_drm_alloc(dev, file_priv, data, AGP_TYPE);
 223 }
 224
 225 static drm_local_map_t *sis_reg_init(struct drm_device *dev)
 226 {
 227         struct drm_map_list *entry;
 228         drm_local_map_t *map;
 229
 230         list_for_each_entry(entry, &dev->maplist, head) {
 231                 map = entry->map;
 232                 if (!map)
 233                         continue;
 234                 if (map->type == _DRM_REGISTERS)
 235                         return map;
 236         }
 237         return NULL;
 238 }
 239
 240 int sis_idle(struct drm_device *dev)
 241 {
 242         drm_sis_private_t *dev_priv = dev->dev_private;
 243         uint32_t idle_reg;
 244         unsigned long end;
 245         int i;
 246
 247         if (dev_priv->idle_fault)
 248                 return 0;
 249
 250         if (dev_priv->mmio == NULL) {
 251                 dev_priv->mmio = sis_reg_init(dev);
 252                 if (dev_priv->mmio == NULL) {
 253                         DRM_ERROR("Could not find register map.\n");
 254                         return 0;
 255                 }
 256         }
 257
 258         /*
 259          * Implement a device switch here if needed
 260          */
 261
 262         if (dev_priv->chipset != SIS_CHIP_315)
 263                 return 0;
 264
 265         /*
 266          * Timeout after 3 seconds. We cannot use DRM_WAIT_ON here
 267          * because its polling frequency is too low.
 268          */
 269
 270         end = jiffies + (HZ * 3);
 271
 272         for (i = 0; i < 4; ++i) {
 273                 do {
 274                         idle_reg = SIS_READ(0x85cc);
 275                 } while (!time_after_eq(jiffies, end) &&
 276                           ((idle_reg & 0x80000000) != 0x80000000));
 277         }
 278
 279         if (time_after_eq(jiffies, end)) {
 280                 DRM_ERROR("Graphics engine idle timeout. "
 281                           "Disabling idle check\n");
 282                 dev_priv->idle_fault = 1;
 283         }
 284
 285         /*
 286          * The caller never sees an error code. It gets trapped
 287          * in libdrm.
 288          */
 289
 290         return 0;
 291 }
 292
 293
 294 void sis_lastclose(struct drm_device *dev)
 295 {
 296         drm_sis_private_t *dev_priv = dev->dev_private;
 297
 298         if (!dev_priv)
 299                 return;
 300
 301         mutex_lock(&dev->struct_mutex);
 302         if (dev_priv->vram_initialized) {
 303                 drm_mm_takedown(&dev_priv->vram_mm);
 304                 dev_priv->vram_initialized = 0;
 305         }
 306         if (dev_priv->agp_initialized) {
 307                 drm_mm_takedown(&dev_priv->agp_mm);
 308                 dev_priv->agp_initialized = 0;
 309         }
 310         dev_priv->mmio = NULL;
 311         mutex_unlock(&dev->struct_mutex);
 312 }
 313
 314 void sis_reclaim_buffers_locked(struct drm_device *dev,
 315                                 struct drm_file *file)
 316 {
 317         struct sis_file_private *file_priv = file->driver_priv;
 318         struct sis_memblock *entry, *next;
 319
 320         if (!(dev->master && file->master->lock.hw_lock))
 321                 return;
 322
 323         drm_legacy_idlelock_take(&file->master->lock);
 324
 325         mutex_lock(&dev->struct_mutex);
 326         if (list_empty(&file_priv->obj_list)) {
 327                 mutex_unlock(&dev->struct_mutex);
 328                 drm_legacy_idlelock_release(&file->master->lock);
 329
 330                 return;
 331         }
 332
 333         sis_idle(dev);
 334
 335
 336         list_for_each_entry_safe(entry, next, &file_priv->obj_list,
 337                                  owner_list) {
 338                 list_del(&entry->owner_list);
 339                 if (drm_mm_node_allocated(&entry->mm_node))
 340                         drm_mm_remove_node(&entry->mm_node);
 341 #if defined(CONFIG_FB_SIS) || defined(CONFIG_FB_SIS_MODULE)
 342                 else
 343                         sis_free(entry->req.offset);
 344 #endif
 345                 kfree(entry);
 346         }
 347         mutex_unlock(&dev->struct_mutex);
 348
 349         drm_legacy_idlelock_release(&file->master->lock);
 350
 351         return;
 352 }
 353
 354 const struct drm_ioctl_desc sis_ioctls[] = {
 355         DRM_IOCTL_DEF_DRV(SIS_FB_ALLOC, sis_fb_alloc, DRM_AUTH),
 356         DRM_IOCTL_DEF_DRV(SIS_FB_FREE, sis_drm_free, DRM_AUTH),
 357         DRM_IOCTL_DEF_DRV(SIS_AGP_INIT, sis_ioctl_agp_init, DRM_AUTH | DRM_MASTER | DRM_ROOT_ONLY),
 358         DRM_IOCTL_DEF_DRV(SIS_AGP_ALLOC, sis_ioctl_agp_alloc, DRM_AUTH),
 359         DRM_IOCTL_DEF_DRV(SIS_AGP_FREE, sis_drm_free, DRM_AUTH),
 360         DRM_IOCTL_DEF_DRV(SIS_FB_INIT, sis_fb_init, DRM_AUTH | DRM_MASTER | DRM_ROOT_ONLY),
 361 };
 362
 363 int sis_max_ioctl = ARRAY_SIZE(sis_ioctls);