drivers/char/drm/sis_mm.c

   1 /* sis_mm.c -- Private header for Direct Rendering Manager -*- linux-c -*-
   2  * Created: Mon Jan  4 10:05:05 1999 by sclin@sis.com.tw
   3  *
   4  * Copyright 2000 Silicon Integrated Systems Corp, Inc., HsinChu, Taiwan.
   5  * All rights reserved.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the "Software"),
   9  * to deal in the Software without restriction, including without limitation
  10  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  11  * and/or sell copies of the Software, and to permit persons to whom the
  12  * Software is furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the next
  15  * paragraph) shall be included in all copies or substantial portions of the
  16  * 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 NONINFRINGEMENT.  IN NO EVENT SHALL
  21  * PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  22  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  23  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  24  * DEALINGS IN THE SOFTWARE.
  25  *
  26  * Authors:
  27  *    Sung-Ching Lin <sclin@sis.com.tw>
  28  *
  29  */
  30
  31 #include "sis.h"
  32 #include "drmP.h"
  33 #include "sis_drm.h"
  34 #include "sis_drv.h"
  35 #include "sis_ds.h"
  36 #if defined(__linux__) && defined(CONFIG_FB_SIS)
  37 #include <video/sisfb.h>
  38 #endif
  39
  40 #define MAX_CONTEXT 100
  41 #define VIDEO_TYPE 0
  42 #define AGP_TYPE 1
  43
  44 typedef struct {
  45         int used;
  46         int context;
  47         set_t *sets[2]; /* 0 for video, 1 for AGP */
  48 } sis_context_t;
  49
  50 static sis_context_t global_ppriv[MAX_CONTEXT];
  51
  52
  53 static int add_alloc_set(int context, int type, unsigned int val)
  54 {
  55         int i, retval = 0;
  56
  57         for (i = 0; i < MAX_CONTEXT; i++) {
  58                 if (global_ppriv[i].used && global_ppriv[i].context == context)
  59                 {
  60                         retval = setAdd(global_ppriv[i].sets[type], val);
  61                         break;
  62                 }
  63         }
  64         return retval;
  65 }
  66
  67 static int del_alloc_set(int context, int type, unsigned int val)
  68 {
  69         int i, retval = 0;
  70
  71         for (i = 0; i < MAX_CONTEXT; i++) {
  72                 if (global_ppriv[i].used && global_ppriv[i].context == context)
  73                 {
  74                         retval = setDel(global_ppriv[i].sets[type], val);
  75                         break;
  76                 }
  77         }
  78         return retval;
  79 }
  80
  81 /* fb management via fb device */
  82 #if defined(__linux__) && defined(CONFIG_FB_SIS)
  83
  84 int sis_fb_init( DRM_IOCTL_ARGS )
  85 {
  86         return 0;
  87 }
  88
  89 int sis_fb_alloc( DRM_IOCTL_ARGS )
  90 {
  91         drm_sis_mem_t fb;
  92         struct sis_memreq req;
  93         drm_sis_mem_t __user *argp = (void __user *)data;
  94         int retval = 0;
  95
  96         DRM_COPY_FROM_USER_IOCTL(fb, argp, sizeof(fb));
  97
  98         req.size = fb.size;
  99         sis_malloc(&req);
 100         if (req.offset) {
 101                 /* TODO */
 102                 fb.offset = req.offset;
 103                 fb.free = req.offset;
 104                 if (!add_alloc_set(fb.context, VIDEO_TYPE, fb.free)) {
 105                         DRM_DEBUG("adding to allocation set fails\n");
 106                         sis_free(req.offset);
 107                         retval = DRM_ERR(EINVAL);
 108                 }
 109         } else {
 110                 fb.offset = 0;
 111                 fb.size = 0;
 112                 fb.free = 0;
 113         }
 114
 115         DRM_COPY_TO_USER_IOCTL(argp, fb, sizeof(fb));
 116
 117         DRM_DEBUG("alloc fb, size = %d, offset = %d\n", fb.size, req.offset);
 118
 119         return retval;
 120 }
 121
 122 int sis_fb_free( DRM_IOCTL_ARGS )
 123 {
 124         drm_sis_mem_t fb;
 125         int retval = 0;
 126
 127         DRM_COPY_FROM_USER_IOCTL(fb, (drm_sis_mem_t __user *)data, sizeof(fb));
 128
 129         if (!fb.free)
 130                 return DRM_ERR(EINVAL);
 131
 132         if (!del_alloc_set(fb.context, VIDEO_TYPE, fb.free))
 133                 retval = DRM_ERR(EINVAL);
 134         sis_free((u32)fb.free);
 135
 136         DRM_DEBUG("free fb, offset = %lu\n", fb.free);
 137
 138         return retval;
 139 }
 140
 141 #else
 142
 143 /* Called by the X Server to initialize the FB heap.  Allocations will fail
 144  * unless this is called.  Offset is the beginning of the heap from the
 145  * framebuffer offset (MaxXFBMem in XFree86).
 146  *
 147  * Memory layout according to Thomas Winischofer:
 148  * |------------------|DDDDDDDDDDDDDDDDDDDDDDDDDDDDD|HHHH|CCCCCCCCCCC|
 149  *
 150  *    X driver/sisfb                                  HW-   Command-
 151  *  framebuffer memory           DRI heap           Cursor   queue
 152  */
 153 int sis_fb_init( DRM_IOCTL_ARGS )
 154 {
 155         DRM_DEVICE;
 156         drm_sis_private_t *dev_priv = dev->dev_private;
 157         drm_sis_fb_t fb;
 158
 159         DRM_COPY_FROM_USER_IOCTL(fb, (drm_sis_fb_t __user *)data, sizeof(fb));
 160
 161         if (dev_priv == NULL) {
 162                 dev->dev_private = DRM(calloc)(1, sizeof(drm_sis_private_t),
 163                     DRM_MEM_DRIVER);
 164                 dev_priv = dev->dev_private;
 165                 if (dev_priv == NULL)
 166                         return ENOMEM;
 167         }
 168
 169         if (dev_priv->FBHeap != NULL)
 170                 return DRM_ERR(EINVAL);
 171
 172         dev_priv->FBHeap = mmInit(fb.offset, fb.size);
 173
 174         DRM_DEBUG("offset = %u, size = %u", fb.offset, fb.size);
 175
 176         return 0;
 177 }
 178
 179 int sis_fb_alloc( DRM_IOCTL_ARGS )
 180 {
 181         DRM_DEVICE;
 182         drm_sis_private_t *dev_priv = dev->dev_private;
 183         drm_sis_mem_t __user *argp = (void __user *)data;
 184         drm_sis_mem_t fb;
 185         PMemBlock block;
 186         int retval = 0;
 187
 188         if (dev_priv == NULL || dev_priv->FBHeap == NULL)
 189                 return DRM_ERR(EINVAL);
 190
 191         DRM_COPY_FROM_USER_IOCTL(fb, argp, sizeof(fb));
 192
 193         block = mmAllocMem(dev_priv->FBHeap, fb.size, 0, 0);
 194         if (block) {
 195                 /* TODO */
 196                 fb.offset = block->ofs;
 197                 fb.free = (unsigned long)block;
 198                 if (!add_alloc_set(fb.context, VIDEO_TYPE, fb.free)) {
 199                         DRM_DEBUG("adding to allocation set fails\n");
 200                         mmFreeMem((PMemBlock)fb.free);
 201                         retval = DRM_ERR(EINVAL);
 202                 }
 203         } else {
 204                 fb.offset = 0;
 205                 fb.size = 0;
 206                 fb.free = 0;
 207         }
 208
 209         DRM_COPY_TO_USER_IOCTL(argp, fb, sizeof(fb));
 210
 211         DRM_DEBUG("alloc fb, size = %d, offset = %d\n", fb.size, fb.offset);
 212
 213         return retval;
 214 }
 215
 216 int sis_fb_free( DRM_IOCTL_ARGS )
 217 {
 218         DRM_DEVICE;
 219         drm_sis_private_t *dev_priv = dev->dev_private;
 220         drm_sis_mem_t fb;
 221
 222         if (dev_priv == NULL || dev_priv->FBHeap == NULL)
 223                 return DRM_ERR(EINVAL);
 224
 225         DRM_COPY_FROM_USER_IOCTL(fb, (drm_sis_mem_t __user *)data, sizeof(fb));
 226
 227         if (!mmBlockInHeap(dev_priv->FBHeap, (PMemBlock)fb.free))
 228                 return DRM_ERR(EINVAL);
 229
 230         if (!del_alloc_set(fb.context, VIDEO_TYPE, fb.free))
 231                 return DRM_ERR(EINVAL);
 232         mmFreeMem((PMemBlock)fb.free);
 233
 234         DRM_DEBUG("free fb, free = 0x%lx\n", fb.free);
 235
 236         return 0;
 237 }
 238
 239 #endif
 240
 241 /* agp memory management */
 242
 243 int sis_ioctl_agp_init( DRM_IOCTL_ARGS )
 244 {
 245         DRM_DEVICE;
 246         drm_sis_private_t *dev_priv = dev->dev_private;
 247         drm_sis_agp_t agp;
 248
 249         if (dev_priv == NULL) {
 250                 dev->dev_private = DRM(calloc)(1, sizeof(drm_sis_private_t),
 251                     DRM_MEM_DRIVER);
 252                 dev_priv = dev->dev_private;
 253                 if (dev_priv == NULL)
 254                         return ENOMEM;
 255         }
 256
 257         if (dev_priv->AGPHeap != NULL)
 258                 return DRM_ERR(EINVAL);
 259
 260         DRM_COPY_FROM_USER_IOCTL(agp, (drm_sis_agp_t __user *)data, sizeof(agp));
 261
 262         dev_priv->AGPHeap = mmInit(agp.offset, agp.size);
 263
 264         DRM_DEBUG("offset = %u, size = %u", agp.offset, agp.size);
 265
 266         return 0;
 267 }
 268
 269 int sis_ioctl_agp_alloc( DRM_IOCTL_ARGS )
 270 {
 271         DRM_DEVICE;
 272         drm_sis_private_t *dev_priv = dev->dev_private;
 273         drm_sis_mem_t __user *argp = (void __user *)data;
 274         drm_sis_mem_t agp;
 275         PMemBlock block;
 276         int retval = 0;
 277
 278         if (dev_priv == NULL || dev_priv->AGPHeap == NULL)
 279                 return DRM_ERR(EINVAL);
 280
 281         DRM_COPY_FROM_USER_IOCTL(agp, argp, sizeof(agp));
 282
 283         block = mmAllocMem(dev_priv->AGPHeap, agp.size, 0, 0);
 284         if (block) {
 285                 /* TODO */
 286                 agp.offset = block->ofs;
 287                 agp.free = (unsigned long)block;
 288                 if (!add_alloc_set(agp.context, AGP_TYPE, agp.free)) {
 289                         DRM_DEBUG("adding to allocation set fails\n");
 290                         mmFreeMem((PMemBlock)agp.free);
 291                         retval = -1;
 292                 }
 293         } else {
 294                 agp.offset = 0;
 295                 agp.size = 0;
 296                 agp.free = 0;
 297         }
 298
 299         DRM_COPY_TO_USER_IOCTL(argp, agp, sizeof(agp));
 300
 301         DRM_DEBUG("alloc agp, size = %d, offset = %d\n", agp.size, agp.offset);
 302
 303         return retval;
 304 }
 305
 306 int sis_ioctl_agp_free( DRM_IOCTL_ARGS )
 307 {
 308         DRM_DEVICE;
 309         drm_sis_private_t *dev_priv = dev->dev_private;
 310         drm_sis_mem_t agp;
 311
 312         if (dev_priv == NULL || dev_priv->AGPHeap == NULL)
 313                 return DRM_ERR(EINVAL);
 314
 315         DRM_COPY_FROM_USER_IOCTL(agp, (drm_sis_mem_t __user *)data, sizeof(agp));
 316
 317         if (!mmBlockInHeap(dev_priv->AGPHeap, (PMemBlock)agp.free))
 318                 return DRM_ERR(EINVAL);
 319
 320         mmFreeMem((PMemBlock)agp.free);
 321         if (!del_alloc_set(agp.context, AGP_TYPE, agp.free))
 322                 return DRM_ERR(EINVAL);
 323
 324         DRM_DEBUG("free agp, free = 0x%lx\n", agp.free);
 325
 326         return 0;
 327 }
 328
 329 int sis_init_context(struct drm_device *dev, int context)
 330 {
 331         int i;
 332
 333         for (i = 0; i < MAX_CONTEXT ; i++) {
 334                 if (global_ppriv[i].used &&
 335                     (global_ppriv[i].context == context))
 336                         break;
 337         }
 338
 339         if (i >= MAX_CONTEXT) {
 340                 for (i = 0; i < MAX_CONTEXT ; i++) {
 341                         if (!global_ppriv[i].used) {
 342                                 global_ppriv[i].context = context;
 343                                 global_ppriv[i].used = 1;
 344                                 global_ppriv[i].sets[0] = setInit();
 345                                 global_ppriv[i].sets[1] = setInit();
 346                                 DRM_DEBUG("init allocation set, socket=%d, "
 347                                     "context = %d\n", i, context);
 348                                 break;
 349                         }
 350                 }
 351                 if ((i >= MAX_CONTEXT) || (global_ppriv[i].sets[0] == NULL) ||
 352                     (global_ppriv[i].sets[1] == NULL))
 353                 {
 354                         return 0;
 355                 }
 356         }
 357
 358         return 1;
 359 }
 360
 361 int sis_final_context(struct drm_device *dev, int context)
 362 {
 363         int i;
 364
 365         for (i=0; i<MAX_CONTEXT; i++) {
 366                 if (global_ppriv[i].used &&
 367                     (global_ppriv[i].context == context))
 368                         break;
 369         }
 370
 371         if (i < MAX_CONTEXT) {
 372                 set_t *set;
 373                 unsigned int item;
 374                 int retval;
 375
 376                 DRM_DEBUG("find socket %d, context = %d\n", i, context);
 377
 378                 /* Video Memory */
 379                 set = global_ppriv[i].sets[0];
 380                 retval = setFirst(set, &item);
 381                 while (retval) {
 382                         DRM_DEBUG("free video memory 0x%x\n", item);
 383 #if defined(__linux__) && defined(CONFIG_FB_SIS)
 384                         sis_free(item);
 385 #else
 386                         mmFreeMem((PMemBlock)item);
 387 #endif
 388                         retval = setNext(set, &item);
 389                 }
 390                 setDestroy(set);
 391
 392                 /* AGP Memory */
 393                 set = global_ppriv[i].sets[1];
 394                 retval = setFirst(set, &item);
 395                 while (retval) {
 396                         DRM_DEBUG("free agp memory 0x%x\n", item);
 397                         mmFreeMem((PMemBlock)item);
 398                         retval = setNext(set, &item);
 399                 }
 400                 setDestroy(set);
 401
 402                 global_ppriv[i].used = 0;
 403         }
 404
 405         return 1;
 406 }
 407
 408 void DRM(driver_register_fns)(drm_device_t *dev)
 409 {
 410         dev->driver_features = DRIVER_USE_AGP | DRIVER_USE_MTRR;
 411         dev->fn_tbl.context_ctor = sis_init_context;
 412         dev->fn_tbl.context_dtor = sis_final_context;
 413 }