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, 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
 149fail_idr:
 150        drm_mm_remove_node(&item->mm_node);
 151fail_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
 165static 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
 193static 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
 199static 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
 217static 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
 224static 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
 239int 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
 293void 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
 313void 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_legacy_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_legacy_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_legacy_idlelock_release(&file->master->lock);
 349
 350        return;
 351}
 352
 353const 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
 362int sis_max_ioctl = ARRAY_SIZE(sis_ioctls);
 363