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