git.oblomov.eu Git - linux-2.6/blob - drivers/char/drm/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 "drmP.h"
  35 #include "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 #if defined(CONFIG_FB_SIS)
  45 /* fb management via fb device */
  46
  47 #define SIS_MM_ALIGN_SHIFT 0
  48 #define SIS_MM_ALIGN_MASK 0
  49
  50 static void *sis_sman_mm_allocate(void *private, unsigned long size,
  51                                   unsigned alignment)
  52 {
  53         struct sis_memreq req;
  54
  55         req.size = size;
  56         sis_malloc(&req);
  57         if (req.size == 0)
  58                 return NULL;
  59         else
  60                 return (void *)~req.offset;
  61 }
  62
  63 static void sis_sman_mm_free(void *private, void *ref)
  64 {
  65         sis_free(~((unsigned long)ref));
  66 }
  67
  68 static void sis_sman_mm_destroy(void *private)
  69 {
  70         ;
  71 }
  72
  73 static unsigned long sis_sman_mm_offset(void *private, void *ref)
  74 {
  75         return ~((unsigned long)ref);
  76 }
  77
  78 #else /* CONFIG_FB_SIS */
  79
  80 #define SIS_MM_ALIGN_SHIFT 4
  81 #define SIS_MM_ALIGN_MASK ( (1 << SIS_MM_ALIGN_SHIFT) - 1)
  82
  83 #endif /* CONFIG_FB_SIS */
  84
  85 static int sis_fb_init(DRM_IOCTL_ARGS)
  86 {
  87         DRM_DEVICE;
  88         drm_sis_private_t *dev_priv = dev->dev_private;
  89         drm_sis_fb_t fb;
  90         int ret;
  91
  92         DRM_COPY_FROM_USER_IOCTL(fb, (drm_sis_fb_t __user *) data, sizeof(fb));
  93
  94         mutex_lock(&dev->struct_mutex);
  95 #if defined(CONFIG_FB_SIS)
  96         {
  97                 drm_sman_mm_t sman_mm;
  98                 sman_mm.private = (void *)0xFFFFFFFF;
  99                 sman_mm.allocate = sis_sman_mm_allocate;
 100                 sman_mm.free = sis_sman_mm_free;
 101                 sman_mm.destroy = sis_sman_mm_destroy;
 102                 sman_mm.offset = sis_sman_mm_offset;
 103                 ret =
 104                     drm_sman_set_manager(&dev_priv->sman, VIDEO_TYPE, &sman_mm);
 105         }
 106 #else
 107         ret = drm_sman_set_range(&dev_priv->sman, VIDEO_TYPE, 0,
 108                                  fb.size >> SIS_MM_ALIGN_SHIFT);
 109 #endif
 110
 111         if (ret) {
 112                 DRM_ERROR("VRAM memory manager initialisation error\n");
 113                 mutex_unlock(&dev->struct_mutex);
 114                 return ret;
 115         }
 116
 117         dev_priv->vram_initialized = 1;
 118         dev_priv->vram_offset = fb.offset;
 119
 120         mutex_unlock(&dev->struct_mutex);
 121         DRM_DEBUG("offset = %u, size = %u", fb.offset, fb.size);
 122
 123         return 0;
 124 }
 125
 126 static int sis_drm_alloc(drm_device_t * dev, drm_file_t * priv,
 127                          unsigned long data, int pool)
 128 {
 129         drm_sis_private_t *dev_priv = dev->dev_private;
 130         drm_sis_mem_t __user *argp = (drm_sis_mem_t __user *) data;
 131         drm_sis_mem_t mem;
 132         int retval = 0;
 133         drm_memblock_item_t *item;
 134
 135         DRM_COPY_FROM_USER_IOCTL(mem, argp, sizeof(mem));
 136
 137         mutex_lock(&dev->struct_mutex);
 138
 139         if (0 == ((pool == 0) ? dev_priv->vram_initialized :
 140                       dev_priv->agp_initialized)) {
 141                 DRM_ERROR
 142                     ("Attempt to allocate from uninitialized memory manager.\n");
 143                 return DRM_ERR(EINVAL);
 144         }
 145
 146         mem.size = (mem.size + SIS_MM_ALIGN_MASK) >> SIS_MM_ALIGN_SHIFT;
 147         item = drm_sman_alloc(&dev_priv->sman, pool, mem.size, 0,
 148                               (unsigned long)priv);
 149
 150         mutex_unlock(&dev->struct_mutex);
 151         if (item) {
 152                 mem.offset = ((pool == 0) ?
 153                               dev_priv->vram_offset : dev_priv->agp_offset) +
 154                     (item->mm->
 155                      offset(item->mm, item->mm_info) << SIS_MM_ALIGN_SHIFT);
 156                 mem.free = item->user_hash.key;
 157                 mem.size = mem.size << SIS_MM_ALIGN_SHIFT;
 158         } else {
 159                 mem.offset = 0;
 160                 mem.size = 0;
 161                 mem.free = 0;
 162                 retval = DRM_ERR(ENOMEM);
 163         }
 164
 165         DRM_COPY_TO_USER_IOCTL(argp, mem, sizeof(mem));
 166
 167         DRM_DEBUG("alloc %d, size = %d, offset = %d\n", pool, mem.size,
 168                   mem.offset);
 169
 170         return retval;
 171 }
 172
 173 static int sis_drm_free(DRM_IOCTL_ARGS)
 174 {
 175         DRM_DEVICE;
 176         drm_sis_private_t *dev_priv = dev->dev_private;
 177         drm_sis_mem_t mem;
 178         int ret;
 179
 180         DRM_COPY_FROM_USER_IOCTL(mem, (drm_sis_mem_t __user *) data,
 181                                  sizeof(mem));
 182
 183         mutex_lock(&dev->struct_mutex);
 184         ret = drm_sman_free_key(&dev_priv->sman, mem.free);
 185         mutex_unlock(&dev->struct_mutex);
 186         DRM_DEBUG("free = 0x%lx\n", mem.free);
 187
 188         return ret;
 189 }
 190
 191 static int sis_fb_alloc(DRM_IOCTL_ARGS)
 192 {
 193         DRM_DEVICE;
 194         return sis_drm_alloc(dev, priv, data, VIDEO_TYPE);
 195 }
 196
 197 static int sis_ioctl_agp_init(DRM_IOCTL_ARGS)
 198 {
 199         DRM_DEVICE;
 200         drm_sis_private_t *dev_priv = dev->dev_private;
 201         drm_sis_agp_t agp;
 202         int ret;
 203         dev_priv = dev->dev_private;
 204
 205         DRM_COPY_FROM_USER_IOCTL(agp, (drm_sis_agp_t __user *) data,
 206                                  sizeof(agp));
 207         mutex_lock(&dev->struct_mutex);
 208         ret = drm_sman_set_range(&dev_priv->sman, AGP_TYPE, 0,
 209                                  agp.size >> SIS_MM_ALIGN_SHIFT);
 210
 211         if (ret) {
 212                 DRM_ERROR("AGP memory manager initialisation error\n");
 213                 mutex_unlock(&dev->struct_mutex);
 214                 return ret;
 215         }
 216
 217         dev_priv->agp_initialized = 1;
 218         dev_priv->agp_offset = agp.offset;
 219         mutex_unlock(&dev->struct_mutex);
 220
 221         DRM_DEBUG("offset = %u, size = %u", agp.offset, agp.size);
 222         return 0;
 223 }
 224
 225 static int sis_ioctl_agp_alloc(DRM_IOCTL_ARGS)
 226 {
 227         DRM_DEVICE;
 228
 229         return sis_drm_alloc(dev, priv, data, AGP_TYPE);
 230 }
 231
 232 static drm_local_map_t *sis_reg_init(drm_device_t *dev)
 233 {
 234         drm_map_list_t *entry;
 235         drm_local_map_t *map;
 236
 237         list_for_each_entry(entry, &dev->maplist->head, head) {
 238                 map = entry->map;
 239                 if (!map)
 240                         continue;
 241                 if (map->type == _DRM_REGISTERS) {
 242                         return map;
 243                 }
 244         }
 245         return NULL;
 246 }
 247
 248 int sis_idle(drm_device_t *dev)
 249 {
 250         drm_sis_private_t *dev_priv = dev->dev_private;
 251         uint32_t idle_reg;
 252         unsigned long end;
 253         int i;
 254
 255         if (dev_priv->idle_fault)
 256                 return 0;
 257
 258         if (dev_priv->mmio == NULL) {
 259                 dev_priv->mmio = sis_reg_init(dev);
 260                 if (dev_priv->mmio == NULL) {
 261                         DRM_ERROR("Could not find register map.\n");
 262                         return 0;
 263                 }
 264         }
 265
 266         /*
 267          * Implement a device switch here if needed
 268          */
 269
 270         if (dev_priv->chipset != SIS_CHIP_315)
 271                 return 0;
 272
 273         /*
 274          * Timeout after 3 seconds. We cannot use DRM_WAIT_ON here
 275          * because its polling frequency is too low.
 276          */
 277
 278         end = jiffies + (DRM_HZ * 3);
 279
 280         for (i=0; i<4; ++i) {
 281                 do {
 282                         idle_reg = SIS_READ(0x85cc);
 283                 } while ( !time_after_eq(jiffies, end) &&
 284                           ((idle_reg & 0x80000000) != 0x80000000));
 285         }
 286
 287         if (time_after_eq(jiffies, end)) {
 288                 DRM_ERROR("Graphics engine idle timeout. "
 289                           "Disabling idle check\n");
 290                 dev_priv->idle_fault = 1;
 291         }
 292
 293         /*
 294          * The caller never sees an error code. It gets trapped
 295          * in libdrm.
 296          */
 297
 298         return 0;
 299 }
 300
 301
 302 void sis_lastclose(struct drm_device *dev)
 303 {
 304         drm_sis_private_t *dev_priv = dev->dev_private;
 305
 306         if (!dev_priv)
 307                 return;
 308
 309         mutex_lock(&dev->struct_mutex);
 310         drm_sman_cleanup(&dev_priv->sman);
 311         dev_priv->vram_initialized = 0;
 312         dev_priv->agp_initialized = 0;
 313         dev_priv->mmio = NULL;
 314         mutex_unlock(&dev->struct_mutex);
 315 }
 316
 317 void sis_reclaim_buffers_locked(drm_device_t * dev, struct file *filp)
 318 {
 319         drm_sis_private_t *dev_priv = dev->dev_private;
 320         drm_file_t *priv = filp->private_data;
 321
 322         mutex_lock(&dev->struct_mutex);
 323         if (drm_sman_owner_clean(&dev_priv->sman, (unsigned long)priv)) {
 324                 mutex_unlock(&dev->struct_mutex);
 325                 return;
 326         }
 327
 328         if (dev->driver->dma_quiescent) {
 329                 dev->driver->dma_quiescent(dev);
 330         }
 331
 332         drm_sman_owner_cleanup(&dev_priv->sman, (unsigned long)priv);
 333         mutex_unlock(&dev->struct_mutex);
 334         return;
 335 }
 336
 337 drm_ioctl_desc_t sis_ioctls[] = {
 338         [DRM_IOCTL_NR(DRM_SIS_FB_ALLOC)] = {sis_fb_alloc, DRM_AUTH},
 339         [DRM_IOCTL_NR(DRM_SIS_FB_FREE)] = {sis_drm_free, DRM_AUTH},
 340         [DRM_IOCTL_NR(DRM_SIS_AGP_INIT)] =
 341             {sis_ioctl_agp_init, DRM_AUTH | DRM_MASTER | DRM_ROOT_ONLY},
 342         [DRM_IOCTL_NR(DRM_SIS_AGP_ALLOC)] = {sis_ioctl_agp_alloc, DRM_AUTH},
 343         [DRM_IOCTL_NR(DRM_SIS_AGP_FREE)] = {sis_drm_free, DRM_AUTH},
 344         [DRM_IOCTL_NR(DRM_SIS_FB_INIT)] =
 345             {sis_fb_init, DRM_AUTH | DRM_MASTER | DRM_ROOT_ONLY}
 346 };
 347
 348 int sis_max_ioctl = DRM_ARRAY_SIZE(sis_ioctls);