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 "drmP.h"
  32 #include "sis_drm.h"
  33 #include "sis_drv.h"
  34 #include "sis_ds.h"
  35 #if defined(__linux__) && defined(CONFIG_FB_SIS)
  36 #include <video/sisfb.h>
  37 #endif
  38
  39 #define MAX_CONTEXT 100
  40 #define VIDEO_TYPE 0
  41 #define AGP_TYPE 1
  42
  43 typedef struct {
  44         int used;
  45         int context;
  46         set_t *sets[2]; /* 0 for video, 1 for AGP */
  47 } sis_context_t;
  48
  49 static sis_context_t global_ppriv[MAX_CONTEXT];
  50
  51
  52 static int add_alloc_set(int context, int type, unsigned int val)
  53 {
  54         int i, retval = 0;
  55
  56         for (i = 0; i < MAX_CONTEXT; i++) {
  57                 if (global_ppriv[i].used && global_ppriv[i].context == context)
  58                 {
  59                         retval = setAdd(global_ppriv[i].sets[type], val);
  60                         break;
  61                 }
  62         }
  63         return retval;
  64 }
  65
  66 static int del_alloc_set(int context, int type, unsigned int val)
  67 {
  68         int i, retval = 0;
  69
  70         for (i = 0; i < MAX_CONTEXT; i++) {
  71                 if (global_ppriv[i].used && global_ppriv[i].context == context)
  72                 {
  73                         retval = setDel(global_ppriv[i].sets[type], val);
  74                         break;
  75                 }
  76         }
  77         return retval;
  78 }
  79
  80 /* fb management via fb device */
  81 #if defined(__linux__) && defined(CONFIG_FB_SIS)
  82
  83 static int sis_fb_init( DRM_IOCTL_ARGS )
  84 {
  85         return 0;
  86 }
  87
  88 static int sis_fb_alloc( DRM_IOCTL_ARGS )
  89 {
  90         drm_sis_mem_t fb;
  91         struct sis_memreq req;
  92         drm_sis_mem_t __user *argp = (void __user *)data;
  93         int retval = 0;
  94
  95         DRM_COPY_FROM_USER_IOCTL(fb, argp, sizeof(fb));
  96
  97         req.size = fb.size;
  98         sis_malloc(&req);
  99         if (req.offset) {
 100                 /* TODO */
 101                 fb.offset = req.offset;
 102                 fb.free = req.offset;
 103                 if (!add_alloc_set(fb.context, VIDEO_TYPE, fb.free)) {
 104                         DRM_DEBUG("adding to allocation set fails\n");
 105                         sis_free(req.offset);
 106                         retval = DRM_ERR(EINVAL);
 107                 }
 108         } else {
 109                 fb.offset = 0;
 110                 fb.size = 0;
 111                 fb.free = 0;
 112         }
 113
 114         DRM_COPY_TO_USER_IOCTL(argp, fb, sizeof(fb));
 115
 116         DRM_DEBUG("alloc fb, size = %d, offset = %d\n", fb.size, req.offset);
 117
 118         return retval;
 119 }
 120
 121 static int sis_fb_free( DRM_IOCTL_ARGS )
 122 {
 123         drm_sis_mem_t fb;
 124         int retval = 0;
 125
 126         DRM_COPY_FROM_USER_IOCTL(fb, (drm_sis_mem_t __user *)data, sizeof(fb));
 127
 128         if (!fb.free)
 129                 return DRM_ERR(EINVAL);
 130
 131         if (!del_alloc_set(fb.context, VIDEO_TYPE, fb.free))
 132                 retval = DRM_ERR(EINVAL);
 133         sis_free((u32)fb.free);
 134
 135         DRM_DEBUG("free fb, offset = %lu\n", fb.free);
 136
 137         return retval;
 138 }
 139
 140 #else
 141
 142 /* Called by the X Server to initialize the FB heap.  Allocations will fail
 143  * unless this is called.  Offset is the beginning of the heap from the
 144  * framebuffer offset (MaxXFBMem in XFree86).
 145  *
 146  * Memory layout according to Thomas Winischofer:
 147  * |------------------|DDDDDDDDDDDDDDDDDDDDDDDDDDDDD|HHHH|CCCCCCCCCCC|
 148  *
 149  *    X driver/sisfb                                  HW-   Command-
 150  *  framebuffer memory           DRI heap           Cursor   queue
 151  */
 152 static int sis_fb_init( DRM_IOCTL_ARGS )
 153 {
 154         DRM_DEVICE;
 155         drm_sis_private_t *dev_priv = dev->dev_private;
 156         drm_sis_fb_t fb;
 157
 158         DRM_COPY_FROM_USER_IOCTL(fb, (drm_sis_fb_t __user *)data, sizeof(fb));
 159
 160         if (dev_priv == NULL) {
 161                 dev->dev_private = drm_calloc(1, sizeof(drm_sis_private_t),
 162                     DRM_MEM_DRIVER);
 163                 dev_priv = dev->dev_private;
 164                 if (dev_priv == NULL)
 165                         return ENOMEM;
 166         }
 167
 168         if (dev_priv->FBHeap != NULL)
 169                 return DRM_ERR(EINVAL);
 170
 171         dev_priv->FBHeap = mmInit(fb.offset, fb.size);
 172
 173         DRM_DEBUG("offset = %u, size = %u", fb.offset, fb.size);
 174
 175         return 0;
 176 }
 177
 178 static int sis_fb_alloc( DRM_IOCTL_ARGS )
 179 {
 180         DRM_DEVICE;
 181         drm_sis_private_t *dev_priv = dev->dev_private;
 182         drm_sis_mem_t __user *argp = (void __user *)data;
 183         drm_sis_mem_t fb;
 184         PMemBlock block;
 185         int retval = 0;
 186
 187         if (dev_priv == NULL || dev_priv->FBHeap == NULL)
 188                 return DRM_ERR(EINVAL);
 189
 190         DRM_COPY_FROM_USER_IOCTL(fb, argp, sizeof(fb));
 191
 192         block = mmAllocMem(dev_priv->FBHeap, fb.size, 0, 0);
 193         if (block) {
 194                 /* TODO */
 195                 fb.offset = block->ofs;
 196                 fb.free = (unsigned long)block;
 197                 if (!add_alloc_set(fb.context, VIDEO_TYPE, fb.free)) {
 198                         DRM_DEBUG("adding to allocation set fails\n");
 199                         mmFreeMem((PMemBlock)fb.free);
 200                         retval = DRM_ERR(EINVAL);
 201                 }
 202         } else {
 203                 fb.offset = 0;
 204                 fb.size = 0;
 205                 fb.free = 0;
 206         }
 207
 208         DRM_COPY_TO_USER_IOCTL(argp, fb, sizeof(fb));
 209
 210         DRM_DEBUG("alloc fb, size = %d, offset = %d\n", fb.size, fb.offset);
 211
 212         return retval;
 213 }
 214
 215 static int sis_fb_free( DRM_IOCTL_ARGS )
 216 {
 217         DRM_DEVICE;
 218         drm_sis_private_t *dev_priv = dev->dev_private;
 219         drm_sis_mem_t fb;
 220
 221         if (dev_priv == NULL || dev_priv->FBHeap == NULL)
 222                 return DRM_ERR(EINVAL);
 223
 224         DRM_COPY_FROM_USER_IOCTL(fb, (drm_sis_mem_t __user *)data, sizeof(fb));
 225
 226         if (!mmBlockInHeap(dev_priv->FBHeap, (PMemBlock)fb.free))
 227                 return DRM_ERR(EINVAL);
 228
 229         if (!del_alloc_set(fb.context, VIDEO_TYPE, fb.free))
 230                 return DRM_ERR(EINVAL);
 231         mmFreeMem((PMemBlock)fb.free);
 232
 233         DRM_DEBUG("free fb, free = 0x%lx\n", fb.free);
 234
 235         return 0;
 236 }
 237
 238 #endif
 239
 240 /* agp memory management */
 241
 242 static int sis_ioctl_agp_init( DRM_IOCTL_ARGS )
 243 {
 244         DRM_DEVICE;
 245         drm_sis_private_t *dev_priv = dev->dev_private;
 246         drm_sis_agp_t agp;
 247
 248         if (dev_priv == NULL) {
 249                 dev->dev_private = drm_calloc(1, sizeof(drm_sis_private_t),
 250                     DRM_MEM_DRIVER);
 251                 dev_priv = dev->dev_private;
 252                 if (dev_priv == NULL)
 253                         return ENOMEM;
 254         }
 255
 256         if (dev_priv->AGPHeap != NULL)
 257                 return DRM_ERR(EINVAL);
 258
 259         DRM_COPY_FROM_USER_IOCTL(agp, (drm_sis_agp_t __user *)data, sizeof(agp));
 260
 261         dev_priv->AGPHeap = mmInit(agp.offset, agp.size);
 262
 263         DRM_DEBUG("offset = %u, size = %u", agp.offset, agp.size);
 264
 265         return 0;
 266 }
 267
 268 static int sis_ioctl_agp_alloc( DRM_IOCTL_ARGS )
 269 {
 270         DRM_DEVICE;
 271         drm_sis_private_t *dev_priv = dev->dev_private;
 272         drm_sis_mem_t __user *argp = (void __user *)data;
 273         drm_sis_mem_t agp;
 274         PMemBlock block;
 275         int retval = 0;
 276
 277         if (dev_priv == NULL || dev_priv->AGPHeap == NULL)
 278                 return DRM_ERR(EINVAL);
 279
 280         DRM_COPY_FROM_USER_IOCTL(agp, argp, sizeof(agp));
 281
 282         block = mmAllocMem(dev_priv->AGPHeap, agp.size, 0, 0);
 283         if (block) {
 284                 /* TODO */
 285                 agp.offset = block->ofs;
 286                 agp.free = (unsigned long)block;
 287                 if (!add_alloc_set(agp.context, AGP_TYPE, agp.free)) {
 288                         DRM_DEBUG("adding to allocation set fails\n");
 289                         mmFreeMem((PMemBlock)agp.free);
 290                         retval = -1;
 291                 }
 292         } else {
 293                 agp.offset = 0;
 294                 agp.size = 0;
 295                 agp.free = 0;
 296         }
 297
 298         DRM_COPY_TO_USER_IOCTL(argp, agp, sizeof(agp));
 299
 300         DRM_DEBUG("alloc agp, size = %d, offset = %d\n", agp.size, agp.offset);
 301
 302         return retval;
 303 }
 304
 305 static int sis_ioctl_agp_free( DRM_IOCTL_ARGS )
 306 {
 307         DRM_DEVICE;
 308         drm_sis_private_t *dev_priv = dev->dev_private;
 309         drm_sis_mem_t agp;
 310
 311         if (dev_priv == NULL || dev_priv->AGPHeap == NULL)
 312                 return DRM_ERR(EINVAL);
 313
 314         DRM_COPY_FROM_USER_IOCTL(agp, (drm_sis_mem_t __user *)data, sizeof(agp));
 315
 316         if (!mmBlockInHeap(dev_priv->AGPHeap, (PMemBlock)agp.free))
 317                 return DRM_ERR(EINVAL);
 318
 319         mmFreeMem((PMemBlock)agp.free);
 320         if (!del_alloc_set(agp.context, AGP_TYPE, agp.free))
 321                 return DRM_ERR(EINVAL);
 322
 323         DRM_DEBUG("free agp, free = 0x%lx\n", agp.free);
 324
 325         return 0;
 326 }
 327
 328 int sis_init_context(struct drm_device *dev, int context)
 329 {
 330         int i;
 331
 332         for (i = 0; i < MAX_CONTEXT ; i++) {
 333                 if (global_ppriv[i].used &&
 334                     (global_ppriv[i].context == context))
 335                         break;
 336         }
 337
 338         if (i >= MAX_CONTEXT) {
 339                 for (i = 0; i < MAX_CONTEXT ; i++) {
 340                         if (!global_ppriv[i].used) {
 341                                 global_ppriv[i].context = context;
 342                                 global_ppriv[i].used = 1;
 343                                 global_ppriv[i].sets[0] = setInit();
 344                                 global_ppriv[i].sets[1] = setInit();
 345                                 DRM_DEBUG("init allocation set, socket=%d, "
 346                                     "context = %d\n", i, context);
 347                                 break;
 348                         }
 349                 }
 350                 if ((i >= MAX_CONTEXT) || (global_ppriv[i].sets[0] == NULL) ||
 351                     (global_ppriv[i].sets[1] == NULL))
 352                 {
 353                         return 0;
 354                 }
 355         }
 356
 357         return 1;
 358 }
 359
 360 int sis_final_context(struct drm_device *dev, int context)
 361 {
 362         int i;
 363
 364         for (i=0; i<MAX_CONTEXT; i++) {
 365                 if (global_ppriv[i].used &&
 366                     (global_ppriv[i].context == context))
 367                         break;
 368         }
 369
 370         if (i < MAX_CONTEXT) {
 371                 set_t *set;
 372                 unsigned int item;
 373                 int retval;
 374
 375                 DRM_DEBUG("find socket %d, context = %d\n", i, context);
 376
 377                 /* Video Memory */
 378                 set = global_ppriv[i].sets[0];
 379                 retval = setFirst(set, &item);
 380                 while (retval) {
 381                         DRM_DEBUG("free video memory 0x%x\n", item);
 382 #if defined(__linux__) && defined(CONFIG_FB_SIS)
 383                         sis_free(item);
 384 #else
 385                         mmFreeMem((PMemBlock)item);
 386 #endif
 387                         retval = setNext(set, &item);
 388                 }
 389                 setDestroy(set);
 390
 391                 /* AGP Memory */
 392                 set = global_ppriv[i].sets[1];
 393                 retval = setFirst(set, &item);
 394                 while (retval) {
 395                         DRM_DEBUG("free agp memory 0x%x\n", item);
 396                         mmFreeMem((PMemBlock)item);
 397                         retval = setNext(set, &item);
 398                 }
 399                 setDestroy(set);
 400
 401                 global_ppriv[i].used = 0;
 402         }
 403
 404         return 1;
 405 }
 406
 407 drm_ioctl_desc_t sis_ioctls[] = {
 408         [DRM_IOCTL_NR(DRM_SIS_FB_ALLOC)]  = { sis_fb_alloc,        1, 0 },
 409         [DRM_IOCTL_NR(DRM_SIS_FB_FREE)]   = { sis_fb_free,         1, 0 },
 410         [DRM_IOCTL_NR(DRM_SIS_AGP_INIT)]  = { sis_ioctl_agp_init,  1, 1 },
 411         [DRM_IOCTL_NR(DRM_SIS_AGP_ALLOC)] = { sis_ioctl_agp_alloc, 1, 0 },
 412         [DRM_IOCTL_NR(DRM_SIS_AGP_FREE)]  = { sis_ioctl_agp_free,  1, 0 },
 413         [DRM_IOCTL_NR(DRM_SIS_FB_INIT)]   = { sis_fb_init,         1, 1 }
 414 };
 415
 416 int sis_max_ioctl = DRM_ARRAY_SIZE(sis_ioctls);
 417