drivers/char/drm/via_mm.c

   1 /*
   2  * Copyright 1998-2003 VIA Technologies, Inc. All Rights Reserved.
   3  * Copyright 2001-2003 S3 Graphics, Inc. All Rights Reserved.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * the rights to use, copy, modify, merge, publish, distribute, sub license,
   9  * and/or sell copies of the Software, and to permit persons to whom the
  10  * Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice (including the
  13  * next paragraph) shall be included in all copies or substantial portions
  14  * of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  19  * VIA, S3 GRAPHICS, AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  20  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  21  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  22  * DEALINGS IN THE SOFTWARE.
  23  */
  24 #include "drmP.h"
  25 #include "via_drm.h"
  26 #include "via_drv.h"
  27 #include "via_ds.h"
  28 #include "via_mm.h"
  29
  30 #define MAX_CONTEXT 100
  31
  32 typedef struct {
  33         int used;
  34         int context;
  35         set_t *sets[2];         /* 0 for frame buffer, 1 for AGP , 2 for System */
  36 } via_context_t;
  37
  38 static via_context_t global_ppriv[MAX_CONTEXT];
  39
  40 static int via_agp_alloc(drm_via_mem_t * mem);
  41 static int via_agp_free(drm_via_mem_t * mem);
  42 static int via_fb_alloc(drm_via_mem_t * mem);
  43 static int via_fb_free(drm_via_mem_t * mem);
  44
  45 static int add_alloc_set(int context, int type, unsigned int val)
  46 {
  47         int i, retval = 0;
  48
  49         for (i = 0; i < MAX_CONTEXT; i++) {
  50                 if (global_ppriv[i].used && global_ppriv[i].context == context) {
  51                         retval = via_setAdd(global_ppriv[i].sets[type], val);
  52                         break;
  53                 }
  54         }
  55
  56         return retval;
  57 }
  58
  59 static int del_alloc_set(int context, int type, unsigned int val)
  60 {
  61         int i, retval = 0;
  62
  63         for (i = 0; i < MAX_CONTEXT; i++)
  64                 if (global_ppriv[i].used && global_ppriv[i].context == context) {
  65                         retval = via_setDel(global_ppriv[i].sets[type], val);
  66                         break;
  67                 }
  68
  69         return retval;
  70 }
  71
  72 /* agp memory management */
  73 static memHeap_t *AgpHeap = NULL;
  74
  75 int via_agp_init(DRM_IOCTL_ARGS)
  76 {
  77         drm_via_agp_t agp;
  78
  79         DRM_COPY_FROM_USER_IOCTL(agp, (drm_via_agp_t __user *) data,
  80                                  sizeof(agp));
  81
  82         AgpHeap = via_mmInit(agp.offset, agp.size);
  83
  84         DRM_DEBUG("offset = %lu, size = %lu", (unsigned long)agp.offset, (unsigned long)agp.size);
  85
  86         return 0;
  87 }
  88
  89 /* fb memory management */
  90 static memHeap_t *FBHeap = NULL;
  91
  92 int via_fb_init(DRM_IOCTL_ARGS)
  93 {
  94         drm_via_fb_t fb;
  95
  96         DRM_COPY_FROM_USER_IOCTL(fb, (drm_via_fb_t __user *) data, sizeof(fb));
  97
  98         FBHeap = via_mmInit(fb.offset, fb.size);
  99
 100         DRM_DEBUG("offset = %lu, size = %lu", (unsigned long)fb.offset, (unsigned long)fb.size);
 101
 102         return 0;
 103 }
 104
 105 int via_init_context(struct drm_device *dev, int context)
 106 {
 107         int i;
 108
 109         for (i = 0; i < MAX_CONTEXT; i++)
 110                 if (global_ppriv[i].used &&
 111                     (global_ppriv[i].context == context))
 112                         break;
 113
 114         if (i >= MAX_CONTEXT) {
 115                 for (i = 0; i < MAX_CONTEXT; i++) {
 116                         if (!global_ppriv[i].used) {
 117                                 global_ppriv[i].context = context;
 118                                 global_ppriv[i].used = 1;
 119                                 global_ppriv[i].sets[0] = via_setInit();
 120                                 global_ppriv[i].sets[1] = via_setInit();
 121                                 DRM_DEBUG("init allocation set, socket=%d,"
 122                                           " context = %d\n", i, context);
 123                                 break;
 124                         }
 125                 }
 126
 127                 if ((i >= MAX_CONTEXT) || (global_ppriv[i].sets[0] == NULL) ||
 128                     (global_ppriv[i].sets[1] == NULL)) {
 129                         return 0;
 130                 }
 131         }
 132
 133         return 1;
 134 }
 135
 136 int via_final_context(struct drm_device *dev, int context)
 137 {
 138         int i;
 139         drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
 140
 141         for (i = 0; i < MAX_CONTEXT; i++)
 142                 if (global_ppriv[i].used &&
 143                     (global_ppriv[i].context == context))
 144                         break;
 145
 146         if (i < MAX_CONTEXT) {
 147                 set_t *set;
 148                 ITEM_TYPE item;
 149                 int retval;
 150
 151                 DRM_DEBUG("find socket %d, context = %d\n", i, context);
 152
 153                 /* Video Memory */
 154                 set = global_ppriv[i].sets[0];
 155                 retval = via_setFirst(set, &item);
 156                 while (retval) {
 157                         DRM_DEBUG("free video memory 0x%lx\n", item);
 158                         via_mmFreeMem((PMemBlock) item);
 159                         retval = via_setNext(set, &item);
 160                 }
 161                 via_setDestroy(set);
 162
 163                 /* AGP Memory */
 164                 set = global_ppriv[i].sets[1];
 165                 retval = via_setFirst(set, &item);
 166                 while (retval) {
 167                         DRM_DEBUG("free agp memory 0x%lx\n", item);
 168                         via_mmFreeMem((PMemBlock) item);
 169                         retval = via_setNext(set, &item);
 170                 }
 171                 via_setDestroy(set);
 172                 global_ppriv[i].used = 0;
 173         }
 174         via_release_futex(dev_priv, context);
 175
 176
 177 #if defined(__linux__)
 178         /* Linux specific until context tracking code gets ported to BSD */
 179         /* Last context, perform cleanup */
 180         if (dev->ctx_count == 1 && dev->dev_private) {
 181                 DRM_DEBUG("Last Context\n");
 182                 if (dev->irq)
 183                         drm_irq_uninstall(dev);
 184
 185                 via_cleanup_futex(dev_priv);
 186                 via_do_cleanup_map(dev);
 187         }
 188 #endif
 189
 190         return 1;
 191 }
 192
 193 int via_mem_alloc(DRM_IOCTL_ARGS)
 194 {
 195         drm_via_mem_t mem;
 196
 197         DRM_COPY_FROM_USER_IOCTL(mem, (drm_via_mem_t __user *) data,
 198                                  sizeof(mem));
 199
 200         switch (mem.type) {
 201         case VIDEO:
 202                 if (via_fb_alloc(&mem) < 0)
 203                         return -EFAULT;
 204                 DRM_COPY_TO_USER_IOCTL((drm_via_mem_t __user *) data, mem,
 205                                        sizeof(mem));
 206                 return 0;
 207         case AGP:
 208                 if (via_agp_alloc(&mem) < 0)
 209                         return -EFAULT;
 210                 DRM_COPY_TO_USER_IOCTL((drm_via_mem_t __user *) data, mem,
 211                                        sizeof(mem));
 212                 return 0;
 213         }
 214
 215         return -EFAULT;
 216 }
 217
 218 static int via_fb_alloc(drm_via_mem_t * mem)
 219 {
 220         drm_via_mm_t fb;
 221         PMemBlock block;
 222         int retval = 0;
 223
 224         if (!FBHeap)
 225                 return -1;
 226
 227         fb.size = mem->size;
 228         fb.context = mem->context;
 229
 230         block = via_mmAllocMem(FBHeap, fb.size, 5, 0);
 231         if (block) {
 232                 fb.offset = block->ofs;
 233                 fb.free = (unsigned long)block;
 234                 if (!add_alloc_set(fb.context, VIDEO, fb.free)) {
 235                         DRM_DEBUG("adding to allocation set fails\n");
 236                         via_mmFreeMem((PMemBlock) fb.free);
 237                         retval = -1;
 238                 }
 239         } else {
 240                 fb.offset = 0;
 241                 fb.size = 0;
 242                 fb.free = 0;
 243                 retval = -1;
 244         }
 245
 246         mem->offset = fb.offset;
 247         mem->index = fb.free;
 248
 249         DRM_DEBUG("alloc fb, size = %d, offset = %d\n", fb.size,
 250                   (int)fb.offset);
 251
 252         return retval;
 253 }
 254
 255 static int via_agp_alloc(drm_via_mem_t * mem)
 256 {
 257         drm_via_mm_t agp;
 258         PMemBlock block;
 259         int retval = 0;
 260
 261         if (!AgpHeap)
 262                 return -1;
 263
 264         agp.size = mem->size;
 265         agp.context = mem->context;
 266
 267         block = via_mmAllocMem(AgpHeap, agp.size, 5, 0);
 268         if (block) {
 269                 agp.offset = block->ofs;
 270                 agp.free = (unsigned long)block;
 271                 if (!add_alloc_set(agp.context, AGP, agp.free)) {
 272                         DRM_DEBUG("adding to allocation set fails\n");
 273                         via_mmFreeMem((PMemBlock) agp.free);
 274                         retval = -1;
 275                 }
 276         } else {
 277                 agp.offset = 0;
 278                 agp.size = 0;
 279                 agp.free = 0;
 280         }
 281
 282         mem->offset = agp.offset;
 283         mem->index = agp.free;
 284
 285         DRM_DEBUG("alloc agp, size = %d, offset = %d\n", agp.size,
 286                   (unsigned int)agp.offset);
 287         return retval;
 288 }
 289
 290 int via_mem_free(DRM_IOCTL_ARGS)
 291 {
 292         drm_via_mem_t mem;
 293
 294         DRM_COPY_FROM_USER_IOCTL(mem, (drm_via_mem_t __user *) data,
 295                                  sizeof(mem));
 296
 297         switch (mem.type) {
 298
 299         case VIDEO:
 300                 if (via_fb_free(&mem) == 0)
 301                         return 0;
 302                 break;
 303         case AGP:
 304                 if (via_agp_free(&mem) == 0)
 305                         return 0;
 306                 break;
 307         }
 308
 309         return -EFAULT;
 310 }
 311
 312 static int via_fb_free(drm_via_mem_t * mem)
 313 {
 314         drm_via_mm_t fb;
 315         int retval = 0;
 316
 317         if (!FBHeap) {
 318                 return -1;
 319         }
 320
 321         fb.free = mem->index;
 322         fb.context = mem->context;
 323
 324         if (!fb.free) {
 325                 return -1;
 326
 327         }
 328
 329         via_mmFreeMem((PMemBlock) fb.free);
 330
 331         if (!del_alloc_set(fb.context, VIDEO, fb.free)) {
 332                 retval = -1;
 333         }
 334
 335         DRM_DEBUG("free fb, free = %ld\n", fb.free);
 336
 337         return retval;
 338 }
 339
 340 static int via_agp_free(drm_via_mem_t * mem)
 341 {
 342         drm_via_mm_t agp;
 343
 344         int retval = 0;
 345
 346         agp.free = mem->index;
 347         agp.context = mem->context;
 348
 349         if (!agp.free)
 350                 return -1;
 351
 352         via_mmFreeMem((PMemBlock) agp.free);
 353
 354         if (!del_alloc_set(agp.context, AGP, agp.free)) {
 355                 retval = -1;
 356         }
 357
 358         DRM_DEBUG("free agp, free = %ld\n", agp.free);
 359
 360         return retval;
 361 }