linux-core/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 #if defined(__linux__)
  39 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
  40 #include <video/sisfb.h>
  41 #else
  42 #include <linux/sisfb.h>
  43 #endif
  44 #endif
  45
  46 #define VIDEO_TYPE 0
  47 #define AGP_TYPE 1
  48
  49 #define SIS_MM_ALIGN_SHIFT 4
  50 #define SIS_MM_ALIGN_MASK ( (1 << SIS_MM_ALIGN_SHIFT) - 1)
  51
  52 #if defined(__linux__) && defined(CONFIG_FB_SIS)
  53 /* fb management via fb device */
  54
  55 #define SIS_MM_ALIGN_SHIFT 0
  56 #define SIS_MM_ALIGN_MASK 0
  57
  58 static void *sis_sman_mm_allocate(void *private, unsigned long size,
  59                                   unsigned alignment)
  60 {
  61         struct sis_memreq req;
  62
  63         req.size = size;
  64         sis_malloc(&req);
  65         if (req.size == 0)
  66                 return NULL;
  67         else
  68                 return (void *)~req.offset;
  69 }
  70
  71 static void sis_sman_mm_free(void *private, void *ref)
  72 {
  73         sis_free(~((unsigned long)ref));
  74 }
  75
  76 static void sis_sman_mm_destroy(void *private)
  77 {
  78         ;
  79 }
  80
  81 unsigned long sis_sman_mm_offset(void *private, void *ref)
  82 {
  83         return ~((unsigned long)ref);
  84 }
  85
  86 #endif
  87
  88 static int sis_fb_init(DRM_IOCTL_ARGS)
  89 {
  90         DRM_DEVICE;
  91         drm_sis_private_t *dev_priv = dev->dev_private;
  92         drm_sis_fb_t fb;
  93         int ret;
  94
  95         DRM_COPY_FROM_USER_IOCTL(fb, (drm_sis_fb_t __user *) data, sizeof(fb));
  96
  97         mutex_lock(&dev->struct_mutex);
  98 #if defined(__linux__) && defined(CONFIG_FB_SIS)
  99         {
 100                 drm_sman_mm_t sman_mm;
 101                 sman_mm.private = (void *)0xFFFFFFFF;
 102                 sman_mm.allocate = sis_sman_mm_allocate;
 103                 sman_mm.free = sis_sman_mm_free;
 104                 sman_mm.destroy = sis_sman_mm_destroy;
 105                 sman_mm.offset = sis_sman_mm_offset;
 106                 ret =
 107                     drm_sman_set_manager(&dev_priv->sman, VIDEO_TYPE, &sman_mm);
 108         }
 109 #else
 110         ret = drm_sman_set_range(&dev_priv->sman, VIDEO_TYPE, 0,
 111                                  fb.size >> SIS_MM_ALIGN_SHIFT);
 112 #endif
 113
 114         if (ret) {
 115                 DRM_ERROR("VRAM memory manager initialisation error\n");
 116                 mutex_unlock(&dev->struct_mutex);
 117                 return ret;
 118         }
 119
 120         dev_priv->vram_initialized = 1;
 121         dev_priv->vram_offset = fb.offset;
 122
 123         mutex_unlock(&dev->struct_mutex);
 124         DRM_DEBUG("offset = %u, size = %u", fb.offset, fb.size);
 125
 126         return 0;
 127 }
 128
 129 static int sis_drm_alloc(drm_device_t * dev, drm_file_t * priv,
 130                          unsigned long data, int pool)
 131 {
 132         drm_sis_private_t *dev_priv = dev->dev_private;
 133         drm_sis_mem_t __user *argp = (drm_sis_mem_t __user *) data;
 134         drm_sis_mem_t mem;
 135         int retval = 0;
 136         drm_memblock_item_t *item;
 137
 138         DRM_COPY_FROM_USER_IOCTL(mem, argp, sizeof(mem));
 139
 140         mutex_lock(&dev->struct_mutex);
 141
 142         if (0 == ((pool == 0) ? dev_priv->vram_initialized :
 143                       dev_priv->agp_initialized)) {
 144                 DRM_ERROR
 145                     ("Attempt to allocate from uninitialized memory manager.\n");
 146                 return DRM_ERR(EINVAL);
 147         }
 148
 149         mem.size = (mem.size + SIS_MM_ALIGN_MASK) >> SIS_MM_ALIGN_SHIFT;
 150         item = drm_sman_alloc(&dev_priv->sman, pool, mem.size, 0,
 151                               (unsigned long)priv);
 152
 153         mutex_unlock(&dev->struct_mutex);
 154         if (item) {
 155                 mem.offset = ((pool == 0) ?
 156                               dev_priv->vram_offset : dev_priv->agp_offset) +
 157                     (item->mm->
 158                      offset(item->mm, item->mm_info) << SIS_MM_ALIGN_SHIFT);
 159                 mem.free = item->user_hash.key;
 160                 mem.size = mem.size << SIS_MM_ALIGN_SHIFT;
 161         } else {
 162                 mem.offset = 0;
 163                 mem.size = 0;
 164                 mem.free = 0;
 165                 retval = DRM_ERR(ENOMEM);
 166         }
 167
 168         DRM_COPY_TO_USER_IOCTL(argp, mem, sizeof(mem));
 169
 170         DRM_DEBUG("alloc %d, size = %d, offset = %d\n", pool, mem.size,
 171                   mem.offset);
 172
 173         return retval;
 174 }
 175
 176 static int sis_drm_free(DRM_IOCTL_ARGS)
 177 {
 178         DRM_DEVICE;
 179         drm_sis_private_t *dev_priv = dev->dev_private;
 180         drm_sis_mem_t mem;
 181         int ret;
 182
 183         DRM_COPY_FROM_USER_IOCTL(mem, (drm_sis_mem_t __user *) data,
 184                                  sizeof(mem));
 185
 186         mutex_lock(&dev->struct_mutex);
 187         ret = drm_sman_free_key(&dev_priv->sman, mem.free);
 188         mutex_unlock(&dev->struct_mutex);
 189         DRM_DEBUG("free = 0x%lx\n", mem.free);
 190
 191         return ret;
 192 }
 193
 194 static int sis_fb_alloc(DRM_IOCTL_ARGS)
 195 {
 196         DRM_DEVICE;
 197         return sis_drm_alloc(dev, priv, data, VIDEO_TYPE);
 198 }
 199
 200 static int sis_ioctl_agp_init(DRM_IOCTL_ARGS)
 201 {
 202         DRM_DEVICE;
 203         drm_sis_private_t *dev_priv = dev->dev_private;
 204         drm_sis_agp_t agp;
 205         int ret;
 206         dev_priv = dev->dev_private;
 207
 208         DRM_COPY_FROM_USER_IOCTL(agp, (drm_sis_agp_t __user *) data,
 209                                  sizeof(agp));
 210         mutex_lock(&dev->struct_mutex);
 211         ret = drm_sman_set_range(&dev_priv->sman, AGP_TYPE, 0,
 212                                  agp.size >> SIS_MM_ALIGN_SHIFT);
 213
 214         if (ret) {
 215                 DRM_ERROR("AGP memory manager initialisation error\n");
 216                 mutex_unlock(&dev->struct_mutex);
 217                 return ret;
 218         }
 219
 220         dev_priv->agp_initialized = 1;
 221         dev_priv->agp_offset = agp.offset;
 222         mutex_unlock(&dev->struct_mutex);
 223
 224         DRM_DEBUG("offset = %u, size = %u", agp.offset, agp.size);
 225         return 0;
 226 }
 227
 228 static int sis_ioctl_agp_alloc(DRM_IOCTL_ARGS)
 229 {
 230         DRM_DEVICE;
 231
 232         return sis_drm_alloc(dev, priv, data, AGP_TYPE);
 233 }
 234
 235 static drm_local_map_t *sis_reg_init(drm_device_t *dev)
 236 {
 237         drm_map_list_t *entry;
 238         drm_local_map_t *map;
 239
 240         list_for_each_entry(entry, &dev->maplist->head, head) {
 241                 map = entry->map;
 242                 if (!map)
 243                         continue;
 244                 if (map->type == _DRM_REGISTERS) {
 245                         return map;
 246                 }
 247         }
 248         return NULL;
 249 }
 250
 251 int
 252 sis_idle(drm_device_t *dev)
 253 {
 254         drm_sis_private_t *dev_priv = dev->dev_private;
 255         uint32_t idle_reg;
 256         unsigned long end;
 257         int i;
 258
 259         if (dev_priv->idle_fault)
 260                 return 0;
 261
 262         if (dev_priv->mmio == NULL) {
 263                 dev_priv->mmio = sis_reg_init(dev);
 264                 if (dev_priv->mmio == NULL) {
 265                         DRM_ERROR("Could not find register map.\n");
 266                         return 0;
 267                 }
 268         }
 269
 270         /*
 271          * Implement a device switch here if needed
 272          */
 273
 274         if (dev_priv->chipset != SIS_CHIP_315)
 275                 return 0;
 276
 277         /*
 278          * Timeout after 3 seconds. We cannot use DRM_WAIT_ON here
 279          * because its polling frequency is too low.
 280          */
 281
 282         end = jiffies + (DRM_HZ * 3);
 283
 284         for (i=0; i<4; ++i) {
 285                 do {
 286                         idle_reg = SIS_READ(0x85cc);
 287                 } while ( !time_after_eq(jiffies, end) &&
 288                           ((idle_reg & 0x80000000) != 0x80000000));
 289         }
 290
 291         if (time_after_eq(jiffies, end)) {
 292                 DRM_ERROR("Graphics engine idle timeout. "
 293                           "Disabling idle check\n");
 294                 dev_priv->idle_fault = 1;
 295         }
 296
 297         /*
 298          * The caller never sees an error code. It gets trapped
 299          * in libdrm.
 300          */
 301
 302         return 0;
 303 }
 304
 305
 306 void sis_lastclose(struct drm_device *dev)
 307 {
 308         drm_sis_private_t *dev_priv = dev->dev_private;
 309
 310         if (!dev_priv)
 311                 return;
 312
 313         mutex_lock(&dev->struct_mutex);
 314         drm_sman_cleanup(&dev_priv->sman);
 315         dev_priv->vram_initialized = 0;
 316         dev_priv->agp_initialized = 0;
 317         dev_priv->mmio = NULL;
 318         mutex_unlock(&dev->struct_mutex);
 319 }
 320
 321 void sis_reclaim_buffers_locked(drm_device_t * dev, struct file *filp)
 322 {
 323         drm_sis_private_t *dev_priv = dev->dev_private;
 324         drm_file_t *priv = filp->private_data;
 325
 326         mutex_lock(&dev->struct_mutex);
 327         if (drm_sman_owner_clean(&dev_priv->sman, (unsigned long)priv)) {
 328                 mutex_unlock(&dev->struct_mutex);
 329                 return;
 330         }
 331
 332         if (dev->driver->dma_quiescent) {
 333                 dev->driver->dma_quiescent(dev);
 334         }
 335
 336         drm_sman_owner_cleanup(&dev_priv->sman, (unsigned long)priv);
 337         mutex_unlock(&dev->struct_mutex);
 338         return;
 339 }
 340
 341 drm_ioctl_desc_t sis_ioctls[] = {
 342         [DRM_IOCTL_NR(DRM_SIS_FB_ALLOC)] = {sis_fb_alloc, DRM_AUTH},
 343         [DRM_IOCTL_NR(DRM_SIS_FB_FREE)] = {sis_drm_free, DRM_AUTH},
 344         [DRM_IOCTL_NR(DRM_SIS_AGP_INIT)] =
 345             {sis_ioctl_agp_init, DRM_AUTH | DRM_MASTER | DRM_ROOT_ONLY},
 346         [DRM_IOCTL_NR(DRM_SIS_AGP_ALLOC)] = {sis_ioctl_agp_alloc, DRM_AUTH},
 347         [DRM_IOCTL_NR(DRM_SIS_AGP_FREE)] = {sis_drm_free, DRM_AUTH},
 348         [DRM_IOCTL_NR(DRM_SIS_FB_INIT)] =
 349             {sis_fb_init, DRM_AUTH | DRM_MASTER | DRM_ROOT_ONLY}
 350 };
 351
 352 int sis_max_ioctl = DRM_ARRAY_SIZE(sis_ioctls);