LXR linux/drivers/gpu/drm/sis/sis

   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
  47struct 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
  66static 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
  85static 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
 150fail_idr:
 151        drm_mm_remove_node(&item->mm_node);
 152fail_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
 166static 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
 194static 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
 200static 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
 218static 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
 225static 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
 240int 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
 294void 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
 314void 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
 354const 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
 363int sis_max_ioctl = ARRAY_SIZE(sis_ioctls);
 364