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 <drm/drmP.h>
  35 #include <drm/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 struct sis_memblock {
  45         struct drm_mm_node mm_node;
  46         struct sis_memreq req;
  47         struct list_head owner_list;
  48 };
  49
  50 #if defined(CONFIG_FB_SIS) || defined(CONFIG_FB_SIS_MODULE)
  51 /* fb management via fb device */
  52
  53 #define SIS_MM_ALIGN_SHIFT 0
  54 #define SIS_MM_ALIGN_MASK 0
  55
  56 #else /* CONFIG_FB_SIS[_MODULE] */
  57
  58 #define SIS_MM_ALIGN_SHIFT 4
  59 #define SIS_MM_ALIGN_MASK ((1 << SIS_MM_ALIGN_SHIFT) - 1)
  60
  61 #endif /* CONFIG_FB_SIS[_MODULE] */
  62
  63 static int sis_fb_init(struct drm_device *dev, void *data, struct drm_file *file_priv)
  64 {
  65         drm_sis_private_t *dev_priv = dev->dev_private;
  66         drm_sis_fb_t *fb = data;
  67
  68         mutex_lock(&dev->struct_mutex);
  69         /* Unconditionally init the drm_mm, even though we don't use it when the
  70          * fb sis driver is available - make cleanup easier. */
  71         drm_mm_init(&dev_priv->vram_mm, 0, fb->size >> SIS_MM_ALIGN_SHIFT);
  72
  73         dev_priv->vram_initialized = 1;
  74         dev_priv->vram_offset = fb->offset;
  75
  76         mutex_unlock(&dev->struct_mutex);
  77         DRM_DEBUG("offset = %lu, size = %lu\n", fb->offset, fb->size);
  78
  79         return 0;
  80 }
  81
  82 static int sis_drm_alloc(struct drm_device *dev, struct drm_file *file,
  83                          void *data, int pool)
  84 {
  85         drm_sis_private_t *dev_priv = dev->dev_private;
  86         drm_sis_mem_t *mem = data;
  87         int retval = 0, user_key;
  88         struct sis_memblock *item;
  89         struct sis_file_private *file_priv = file->driver_priv;
  90         unsigned long offset;
  91
  92         mutex_lock(&dev->struct_mutex);
  93
  94         if (0 == ((pool == 0) ? dev_priv->vram_initialized :
  95                       dev_priv->agp_initialized)) {
  96                 DRM_ERROR
  97                     ("Attempt to allocate from uninitialized memory manager.\n");
  98                 mutex_unlock(&dev->struct_mutex);
  99                 return -EINVAL;
 100         }
 101
 102         item = kzalloc(sizeof(*item), GFP_KERNEL);
 103         if (!item) {
 104                 retval = -ENOMEM;
 105                 goto fail_alloc;
 106         }
 107
 108         mem->size = (mem->size + SIS_MM_ALIGN_MASK) >> SIS_MM_ALIGN_SHIFT;
 109         if (pool == AGP_TYPE) {
 110                 retval = drm_mm_insert_node(&dev_priv->agp_mm,
 111                                             &item->mm_node,
 112                                             mem->size, 0,
 113                                             DRM_MM_SEARCH_DEFAULT);
 114                 offset = item->mm_node.start;
 115         } else {
 116 #if defined(CONFIG_FB_SIS) || defined(CONFIG_FB_SIS_MODULE)
 117                 item->req.size = mem->size;
 118                 sis_malloc(&item->req);
 119                 if (item->req.size == 0)
 120                         retval = -ENOMEM;
 121                 offset = item->req.offset;
 122 #else
 123                 retval = drm_mm_insert_node(&dev_priv->vram_mm,
 124                                             &item->mm_node,
 125                                             mem->size, 0,
 126                                             DRM_MM_SEARCH_DEFAULT);
 127                 offset = item->mm_node.start;
 128 #endif
 129         }
 130         if (retval)
 131                 goto fail_alloc;
 132
 133         retval = idr_alloc(&dev_priv->object_idr, item, 1, 0, GFP_KERNEL);
 134         if (retval < 0)
 135                 goto fail_idr;
 136         user_key = retval;
 137
 138         list_add(&item->owner_list, &file_priv->obj_list);
 139         mutex_unlock(&dev->struct_mutex);
 140
 141         mem->offset = ((pool == 0) ?
 142                       dev_priv->vram_offset : dev_priv->agp_offset) +
 143             (offset << SIS_MM_ALIGN_SHIFT);
 144         mem->free = user_key;
 145         mem->size = mem->size << SIS_MM_ALIGN_SHIFT;
 146
 147         return 0;
 148
 149 fail_idr:
 150         drm_mm_remove_node(&item->mm_node);
 151 fail_alloc:
 152         kfree(item);
 153         mutex_unlock(&dev->struct_mutex);
 154
 155         mem->offset = 0;
 156         mem->size = 0;
 157         mem->free = 0;
 158
 159         DRM_DEBUG("alloc %d, size = %ld, offset = %ld\n", pool, mem->size,
 160                   mem->offset);
 161
 162         return retval;
 163 }
 164
 165 static int sis_drm_free(struct drm_device *dev, void *data, struct drm_file *file_priv)
 166 {
 167         drm_sis_private_t *dev_priv = dev->dev_private;
 168         drm_sis_mem_t *mem = data;
 169         struct sis_memblock *obj;
 170
 171         mutex_lock(&dev->struct_mutex);
 172         obj = idr_find(&dev_priv->object_idr, mem->free);
 173         if (obj == NULL) {
 174                 mutex_unlock(&dev->struct_mutex);
 175                 return -EINVAL;
 176         }
 177
 178         idr_remove(&dev_priv->object_idr, mem->free);
 179         list_del(&obj->owner_list);
 180         if (drm_mm_node_allocated(&obj->mm_node))
 181                 drm_mm_remove_node(&obj->mm_node);
 182 #if defined(CONFIG_FB_SIS) || defined(CONFIG_FB_SIS_MODULE)
 183         else
 184                 sis_free(obj->req.offset);
 185 #endif
 186         kfree(obj);
 187         mutex_unlock(&dev->struct_mutex);
 188         DRM_DEBUG("free = 0x%lx\n", mem->free);
 189
 190         return 0;
 191 }
 192
 193 static int sis_fb_alloc(struct drm_device *dev, void *data,
 194                         struct drm_file *file_priv)
 195 {
 196         return sis_drm_alloc(dev, file_priv, data, VIDEO_TYPE);
 197 }
 198
 199 static int sis_ioctl_agp_init(struct drm_device *dev, void *data,
 200                               struct drm_file *file_priv)
 201 {
 202         drm_sis_private_t *dev_priv = dev->dev_private;
 203         drm_sis_agp_t *agp = data;
 204         dev_priv = dev->dev_private;
 205
 206         mutex_lock(&dev->struct_mutex);
 207         drm_mm_init(&dev_priv->agp_mm, 0, agp->size >> SIS_MM_ALIGN_SHIFT);
 208
 209         dev_priv->agp_initialized = 1;
 210         dev_priv->agp_offset = agp->offset;
 211         mutex_unlock(&dev->struct_mutex);
 212
 213         DRM_DEBUG("offset = %lu, size = %lu\n", agp->offset, agp->size);
 214         return 0;
 215 }
 216
 217 static int sis_ioctl_agp_alloc(struct drm_device *dev, void *data,
 218                                struct drm_file *file_priv)
 219 {
 220
 221         return sis_drm_alloc(dev, file_priv, data, AGP_TYPE);
 222 }
 223
 224 static drm_local_map_t *sis_reg_init(struct drm_device *dev)
 225 {
 226         struct drm_map_list *entry;
 227         drm_local_map_t *map;
 228
 229         list_for_each_entry(entry, &dev->maplist, head) {
 230                 map = entry->map;
 231                 if (!map)
 232                         continue;
 233                 if (map->type == _DRM_REGISTERS)
 234                         return map;
 235         }
 236         return NULL;
 237 }
 238
 239 int sis_idle(struct drm_device *dev)
 240 {
 241         drm_sis_private_t *dev_priv = dev->dev_private;
 242         uint32_t idle_reg;
 243         unsigned long end;
 244         int i;
 245
 246         if (dev_priv->idle_fault)
 247                 return 0;
 248
 249         if (dev_priv->mmio == NULL) {
 250                 dev_priv->mmio = sis_reg_init(dev);
 251                 if (dev_priv->mmio == NULL) {
 252                         DRM_ERROR("Could not find register map.\n");
 253                         return 0;
 254                 }
 255         }
 256
 257         /*
 258          * Implement a device switch here if needed
 259          */
 260
 261         if (dev_priv->chipset != SIS_CHIP_315)
 262                 return 0;
 263
 264         /*
 265          * Timeout after 3 seconds. We cannot use DRM_WAIT_ON here
 266          * because its polling frequency is too low.
 267          */
 268
 269         end = jiffies + (HZ * 3);
 270
 271         for (i = 0; i < 4; ++i) {
 272                 do {
 273                         idle_reg = SIS_READ(0x85cc);
 274                 } while (!time_after_eq(jiffies, end) &&
 275                           ((idle_reg & 0x80000000) != 0x80000000));
 276         }
 277
 278         if (time_after_eq(jiffies, end)) {
 279                 DRM_ERROR("Graphics engine idle timeout. "
 280                           "Disabling idle check\n");
 281                 dev_priv->idle_fault = 1;
 282         }
 283
 284         /*
 285          * The caller never sees an error code. It gets trapped
 286          * in libdrm.
 287          */
 288
 289         return 0;
 290 }
 291
 292
 293 void sis_lastclose(struct drm_device *dev)
 294 {
 295         drm_sis_private_t *dev_priv = dev->dev_private;
 296
 297         if (!dev_priv)
 298                 return;
 299
 300         mutex_lock(&dev->struct_mutex);
 301         if (dev_priv->vram_initialized) {
 302                 drm_mm_takedown(&dev_priv->vram_mm);
 303                 dev_priv->vram_initialized = 0;
 304         }
 305         if (dev_priv->agp_initialized) {
 306                 drm_mm_takedown(&dev_priv->agp_mm);
 307                 dev_priv->agp_initialized = 0;
 308         }
 309         dev_priv->mmio = NULL;
 310         mutex_unlock(&dev->struct_mutex);
 311 }
 312
 313 void sis_reclaim_buffers_locked(struct drm_device *dev,
 314                                 struct drm_file *file)
 315 {
 316         struct sis_file_private *file_priv = file->driver_priv;
 317         struct sis_memblock *entry, *next;
 318
 319         if (!(file->minor->master && file->master->lock.hw_lock))
 320                 return;
 321
 322         drm_idlelock_take(&file->master->lock);
 323
 324         mutex_lock(&dev->struct_mutex);
 325         if (list_empty(&file_priv->obj_list)) {
 326                 mutex_unlock(&dev->struct_mutex);
 327                 drm_idlelock_release(&file->master->lock);
 328
 329                 return;
 330         }
 331
 332         sis_idle(dev);
 333
 334
 335         list_for_each_entry_safe(entry, next, &file_priv->obj_list,
 336                                  owner_list) {
 337                 list_del(&entry->owner_list);
 338                 if (drm_mm_node_allocated(&entry->mm_node))
 339                         drm_mm_remove_node(&entry->mm_node);
 340 #if defined(CONFIG_FB_SIS) || defined(CONFIG_FB_SIS_MODULE)
 341                 else
 342                         sis_free(entry->req.offset);
 343 #endif
 344                 kfree(entry);
 345         }
 346         mutex_unlock(&dev->struct_mutex);
 347
 348         drm_idlelock_release(&file->master->lock);
 349
 350         return;
 351 }
 352
 353 const struct drm_ioctl_desc sis_ioctls[] = {
 354         DRM_IOCTL_DEF_DRV(SIS_FB_ALLOC, sis_fb_alloc, DRM_AUTH),
 355         DRM_IOCTL_DEF_DRV(SIS_FB_FREE, sis_drm_free, DRM_AUTH),
 356         DRM_IOCTL_DEF_DRV(SIS_AGP_INIT, sis_ioctl_agp_init, DRM_AUTH | DRM_MASTER | DRM_ROOT_ONLY),
 357         DRM_IOCTL_DEF_DRV(SIS_AGP_ALLOC, sis_ioctl_agp_alloc, DRM_AUTH),
 358         DRM_IOCTL_DEF_DRV(SIS_AGP_FREE, sis_drm_free, DRM_AUTH),
 359         DRM_IOCTL_DEF_DRV(SIS_FB_INIT, sis_fb_init, DRM_AUTH | DRM_MASTER | DRM_ROOT_ONLY),
 360 };
 361
 362 int sis_max_ioctl = DRM_ARRAY_SIZE(sis_ioctls);