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 <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
  44struct 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
  63static 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
  82static 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);
 113                offset = item->mm_node.start;
 114        } else {
 115#if defined(CONFIG_FB_SIS) || defined(CONFIG_FB_SIS_MODULE)
 116                item->req.size = mem->size;
 117                sis_malloc(&item->req);
 118                if (item->req.size == 0)
 119                        retval = -ENOMEM;
 120                offset = item->req.offset;
 121#else
 122                retval = drm_mm_insert_node(&dev_priv->vram_mm,
 123                                            &item->mm_node,
 124                                            mem->size);
 125                offset = item->mm_node.start;
 126#endif
 127        }
 128        if (retval)
 129                goto fail_alloc;
 130
 131        retval = idr_alloc(&dev_priv->object_idr, item, 1, 0, GFP_KERNEL);
 132        if (retval < 0)
 133                goto fail_idr;
 134        user_key = retval;
 135
 136        list_add(&item->owner_list, &file_priv->obj_list);
 137        mutex_unlock(&dev->struct_mutex);
 138
 139        mem->offset = ((pool == 0) ?
 140                      dev_priv->vram_offset : dev_priv->agp_offset) +
 141            (offset << SIS_MM_ALIGN_SHIFT);
 142        mem->free = user_key;
 143        mem->size = mem->size << SIS_MM_ALIGN_SHIFT;
 144
 145        return 0;
 146
 147fail_idr:
 148        drm_mm_remove_node(&item->mm_node);
 149fail_alloc:
 150        kfree(item);
 151        mutex_unlock(&dev->struct_mutex);
 152
 153        mem->offset = 0;
 154        mem->size = 0;
 155        mem->free = 0;
 156
 157        DRM_DEBUG("alloc %d, size = %ld, offset = %ld\n", pool, mem->size,
 158                  mem->offset);
 159
 160        return retval;
 161}
 162
 163static int sis_drm_free(struct drm_device *dev, void *data, struct drm_file *file_priv)
 164{
 165        drm_sis_private_t *dev_priv = dev->dev_private;
 166        drm_sis_mem_t *mem = data;
 167        struct sis_memblock *obj;
 168
 169        mutex_lock(&dev->struct_mutex);
 170        obj = idr_find(&dev_priv->object_idr, mem->free);
 171        if (obj == NULL) {
 172                mutex_unlock(&dev->struct_mutex);
 173                return -EINVAL;
 174        }
 175
 176        idr_remove(&dev_priv->object_idr, mem->free);
 177        list_del(&obj->owner_list);
 178        if (drm_mm_node_allocated(&obj->mm_node))
 179                drm_mm_remove_node(&obj->mm_node);
 180#if defined(CONFIG_FB_SIS) || defined(CONFIG_FB_SIS_MODULE)
 181        else
 182                sis_free(obj->req.offset);
 183#endif
 184        kfree(obj);
 185        mutex_unlock(&dev->struct_mutex);
 186        DRM_DEBUG("free = 0x%lx\n", mem->free);
 187
 188        return 0;
 189}
 190
 191static int sis_fb_alloc(struct drm_device *dev, void *data,
 192                        struct drm_file *file_priv)
 193{
 194        return sis_drm_alloc(dev, file_priv, data, VIDEO_TYPE);
 195}
 196
 197static int sis_ioctl_agp_init(struct drm_device *dev, void *data,
 198                              struct drm_file *file_priv)
 199{
 200        drm_sis_private_t *dev_priv = dev->dev_private;
 201        drm_sis_agp_t *agp = data;
 202        dev_priv = dev->dev_private;
 203
 204        mutex_lock(&dev->struct_mutex);
 205        drm_mm_init(&dev_priv->agp_mm, 0, agp->size >> SIS_MM_ALIGN_SHIFT);
 206
 207        dev_priv->agp_initialized = 1;
 208        dev_priv->agp_offset = agp->offset;
 209        mutex_unlock(&dev->struct_mutex);
 210
 211        DRM_DEBUG("offset = %lu, size = %lu\n", agp->offset, agp->size);
 212        return 0;
 213}
 214
 215static int sis_ioctl_agp_alloc(struct drm_device *dev, void *data,
 216                               struct drm_file *file_priv)
 217{
 218
 219        return sis_drm_alloc(dev, file_priv, data, AGP_TYPE);
 220}
 221
 222static drm_local_map_t *sis_reg_init(struct drm_device *dev)
 223{
 224        struct drm_map_list *entry;
 225        drm_local_map_t *map;
 226
 227        list_for_each_entry(entry, &dev->maplist, head) {
 228                map = entry->map;
 229                if (!map)
 230                        continue;
 231                if (map->type == _DRM_REGISTERS)
 232                        return map;
 233        }
 234        return NULL;
 235}
 236
 237int sis_idle(struct drm_device *dev)
 238{
 239        drm_sis_private_t *dev_priv = dev->dev_private;
 240        uint32_t idle_reg;
 241        unsigned long end;
 242        int i;
 243
 244        if (dev_priv->idle_fault)
 245                return 0;
 246
 247        if (dev_priv->mmio == NULL) {
 248                dev_priv->mmio = sis_reg_init(dev);
 249                if (dev_priv->mmio == NULL) {
 250                        DRM_ERROR("Could not find register map.\n");
 251                        return 0;
 252                }
 253        }
 254
 255        /*
 256         * Implement a device switch here if needed
 257         */
 258
 259        if (dev_priv->chipset != SIS_CHIP_315)
 260                return 0;
 261
 262        /*
 263         * Timeout after 3 seconds. We cannot use DRM_WAIT_ON here
 264         * because its polling frequency is too low.
 265         */
 266
 267        end = jiffies + (HZ * 3);
 268
 269        for (i = 0; i < 4; ++i) {
 270                do {
 271                        idle_reg = SIS_READ(0x85cc);
 272                } while (!time_after_eq(jiffies, end) &&
 273                          ((idle_reg & 0x80000000) != 0x80000000));
 274        }
 275
 276        if (time_after_eq(jiffies, end)) {
 277                DRM_ERROR("Graphics engine idle timeout. "
 278                          "Disabling idle check\n");
 279                dev_priv->idle_fault = 1;
 280        }
 281
 282        /*
 283         * The caller never sees an error code. It gets trapped
 284         * in libdrm.
 285         */
 286
 287        return 0;
 288}
 289
 290
 291void sis_lastclose(struct drm_device *dev)
 292{
 293        drm_sis_private_t *dev_priv = dev->dev_private;
 294
 295        if (!dev_priv)
 296                return;
 297
 298        mutex_lock(&dev->struct_mutex);
 299        if (dev_priv->vram_initialized) {
 300                drm_mm_takedown(&dev_priv->vram_mm);
 301                dev_priv->vram_initialized = 0;
 302        }
 303        if (dev_priv->agp_initialized) {
 304                drm_mm_takedown(&dev_priv->agp_mm);
 305                dev_priv->agp_initialized = 0;
 306        }
 307        dev_priv->mmio = NULL;
 308        mutex_unlock(&dev->struct_mutex);
 309}
 310
 311void sis_reclaim_buffers_locked(struct drm_device *dev,
 312                                struct drm_file *file)
 313{
 314        struct sis_file_private *file_priv = file->driver_priv;
 315        struct sis_memblock *entry, *next;
 316
 317        if (!(dev->master && file->master->lock.hw_lock))
 318                return;
 319
 320        drm_legacy_idlelock_take(&file->master->lock);
 321
 322        mutex_lock(&dev->struct_mutex);
 323        if (list_empty(&file_priv->obj_list)) {
 324                mutex_unlock(&dev->struct_mutex);
 325                drm_legacy_idlelock_release(&file->master->lock);
 326
 327                return;
 328        }
 329
 330        sis_idle(dev);
 331
 332
 333        list_for_each_entry_safe(entry, next, &file_priv->obj_list,
 334                                 owner_list) {
 335                list_del(&entry->owner_list);
 336                if (drm_mm_node_allocated(&entry->mm_node))
 337                        drm_mm_remove_node(&entry->mm_node);
 338#if defined(CONFIG_FB_SIS) || defined(CONFIG_FB_SIS_MODULE)
 339                else
 340                        sis_free(entry->req.offset);
 341#endif
 342                kfree(entry);
 343        }
 344        mutex_unlock(&dev->struct_mutex);
 345
 346        drm_legacy_idlelock_release(&file->master->lock);
 347
 348        return;
 349}
 350
 351const struct drm_ioctl_desc sis_ioctls[] = {
 352        DRM_IOCTL_DEF_DRV(SIS_FB_ALLOC, sis_fb_alloc, DRM_AUTH),
 353        DRM_IOCTL_DEF_DRV(SIS_FB_FREE, sis_drm_free, DRM_AUTH),
 354        DRM_IOCTL_DEF_DRV(SIS_AGP_INIT, sis_ioctl_agp_init, DRM_AUTH | DRM_MASTER | DRM_ROOT_ONLY),
 355        DRM_IOCTL_DEF_DRV(SIS_AGP_ALLOC, sis_ioctl_agp_alloc, DRM_AUTH),
 356        DRM_IOCTL_DEF_DRV(SIS_AGP_FREE, sis_drm_free, DRM_AUTH),
 357        DRM_IOCTL_DEF_DRV(SIS_FB_INIT, sis_fb_init, DRM_AUTH | DRM_MASTER | DRM_ROOT_ONLY),
 358};
 359
 360int sis_max_ioctl = ARRAY_SIZE(sis_ioctls);
 361