drivers/gpu/drm/nouveau/nouveau_sgdma.c

   1 #include <drm/drmP.h>
   2 #include "nouveau_drv.h"
   3 #include <linux/pagemap.h>
   4 #include <linux/slab.h>
   5
   6 #define NV_CTXDMA_PAGE_SHIFT 12
   7 #define NV_CTXDMA_PAGE_SIZE  (1 << NV_CTXDMA_PAGE_SHIFT)
   8 #define NV_CTXDMA_PAGE_MASK  (NV_CTXDMA_PAGE_SIZE - 1)
   9
  10 struct nouveau_sgdma_be {
  11         /* this has to be the first field so populate/unpopulated in
  12          * nouve_bo.c works properly, otherwise have to move them here
  13          */
  14         struct ttm_dma_tt ttm;
  15         struct drm_device *dev;
  16         u64 offset;
  17 };
  18
  19 static void
  20 nouveau_sgdma_destroy(struct ttm_tt *ttm)
  21 {
  22         struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm;
  23
  24         if (ttm) {
  25                 NV_DEBUG(nvbe->dev, "\n");
  26                 ttm_dma_tt_fini(&nvbe->ttm);
  27                 kfree(nvbe);
  28         }
  29 }
  30
  31 static int
  32 nv04_sgdma_bind(struct ttm_tt *ttm, struct ttm_mem_reg *mem)
  33 {
  34         struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm;
  35         struct drm_device *dev = nvbe->dev;
  36         struct drm_nouveau_private *dev_priv = dev->dev_private;
  37         struct nouveau_gpuobj *gpuobj = dev_priv->gart_info.sg_ctxdma;
  38         unsigned i, j, pte;
  39
  40         NV_DEBUG(dev, "pg=0x%lx\n", mem->start);
  41
  42         nvbe->offset = mem->start << PAGE_SHIFT;
  43         pte = (nvbe->offset >> NV_CTXDMA_PAGE_SHIFT) + 2;
  44         for (i = 0; i < ttm->num_pages; i++) {
  45                 dma_addr_t dma_offset = nvbe->ttm.dma_address[i];
  46                 uint32_t offset_l = lower_32_bits(dma_offset);
  47
  48                 for (j = 0; j < PAGE_SIZE / NV_CTXDMA_PAGE_SIZE; j++, pte++) {
  49                         nv_wo32(gpuobj, (pte * 4) + 0, offset_l | 3);
  50                         offset_l += NV_CTXDMA_PAGE_SIZE;
  51                 }
  52         }
  53
  54         return 0;
  55 }
  56
  57 static int
  58 nv04_sgdma_unbind(struct ttm_tt *ttm)
  59 {
  60         struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm;
  61         struct drm_device *dev = nvbe->dev;
  62         struct drm_nouveau_private *dev_priv = dev->dev_private;
  63         struct nouveau_gpuobj *gpuobj = dev_priv->gart_info.sg_ctxdma;
  64         unsigned i, j, pte;
  65
  66         NV_DEBUG(dev, "\n");
  67
  68         if (ttm->state != tt_bound)
  69                 return 0;
  70
  71         pte = (nvbe->offset >> NV_CTXDMA_PAGE_SHIFT) + 2;
  72         for (i = 0; i < ttm->num_pages; i++) {
  73                 for (j = 0; j < PAGE_SIZE / NV_CTXDMA_PAGE_SIZE; j++, pte++)
  74                         nv_wo32(gpuobj, (pte * 4) + 0, 0x00000000);
  75         }
  76
  77         return 0;
  78 }
  79
  80 static struct ttm_backend_func nv04_sgdma_backend = {
  81         .bind                   = nv04_sgdma_bind,
  82         .unbind                 = nv04_sgdma_unbind,
  83         .destroy                = nouveau_sgdma_destroy
  84 };
  85
  86 static void
  87 nv41_sgdma_flush(struct nouveau_sgdma_be *nvbe)
  88 {
  89         struct drm_device *dev = nvbe->dev;
  90
  91         nv_wr32(dev, 0x100810, 0x00000022);
  92         if (!nv_wait(dev, 0x100810, 0x00000100, 0x00000100))
  93                 NV_ERROR(dev, "vm flush timeout: 0x%08x\n",
  94                          nv_rd32(dev, 0x100810));
  95         nv_wr32(dev, 0x100810, 0x00000000);
  96 }
  97
  98 static int
  99 nv41_sgdma_bind(struct ttm_tt *ttm, struct ttm_mem_reg *mem)
 100 {
 101         struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm;
 102         struct drm_nouveau_private *dev_priv = nvbe->dev->dev_private;
 103         struct nouveau_gpuobj *pgt = dev_priv->gart_info.sg_ctxdma;
 104         dma_addr_t *list = nvbe->ttm.dma_address;
 105         u32 pte = mem->start << 2;
 106         u32 cnt = ttm->num_pages;
 107
 108         nvbe->offset = mem->start << PAGE_SHIFT;
 109
 110         while (cnt--) {
 111                 nv_wo32(pgt, pte, (*list++ >> 7) | 1);
 112                 pte += 4;
 113         }
 114
 115         nv41_sgdma_flush(nvbe);
 116         return 0;
 117 }
 118
 119 static int
 120 nv41_sgdma_unbind(struct ttm_tt *ttm)
 121 {
 122         struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm;
 123         struct drm_nouveau_private *dev_priv = nvbe->dev->dev_private;
 124         struct nouveau_gpuobj *pgt = dev_priv->gart_info.sg_ctxdma;
 125         u32 pte = (nvbe->offset >> 12) << 2;
 126         u32 cnt = ttm->num_pages;
 127
 128         while (cnt--) {
 129                 nv_wo32(pgt, pte, 0x00000000);
 130                 pte += 4;
 131         }
 132
 133         nv41_sgdma_flush(nvbe);
 134         return 0;
 135 }
 136
 137 static struct ttm_backend_func nv41_sgdma_backend = {
 138         .bind                   = nv41_sgdma_bind,
 139         .unbind                 = nv41_sgdma_unbind,
 140         .destroy                = nouveau_sgdma_destroy
 141 };
 142
 143 static void
 144 nv44_sgdma_flush(struct ttm_tt *ttm)
 145 {
 146         struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm;
 147         struct drm_device *dev = nvbe->dev;
 148
 149         nv_wr32(dev, 0x100814, (ttm->num_pages - 1) << 12);
 150         nv_wr32(dev, 0x100808, nvbe->offset | 0x20);
 151         if (!nv_wait(dev, 0x100808, 0x00000001, 0x00000001))
 152                 NV_ERROR(dev, "gart flush timeout: 0x%08x\n",
 153                          nv_rd32(dev, 0x100808));
 154         nv_wr32(dev, 0x100808, 0x00000000);
 155 }
 156
 157 static void
 158 nv44_sgdma_fill(struct nouveau_gpuobj *pgt, dma_addr_t *list, u32 base, u32 cnt)
 159 {
 160         struct drm_nouveau_private *dev_priv = pgt->dev->dev_private;
 161         dma_addr_t dummy = dev_priv->gart_info.dummy.addr;
 162         u32 pte, tmp[4];
 163
 164         pte   = base >> 2;
 165         base &= ~0x0000000f;
 166
 167         tmp[0] = nv_ro32(pgt, base + 0x0);
 168         tmp[1] = nv_ro32(pgt, base + 0x4);
 169         tmp[2] = nv_ro32(pgt, base + 0x8);
 170         tmp[3] = nv_ro32(pgt, base + 0xc);
 171         while (cnt--) {
 172                 u32 addr = list ? (*list++ >> 12) : (dummy >> 12);
 173                 switch (pte++ & 0x3) {
 174                 case 0:
 175                         tmp[0] &= ~0x07ffffff;
 176                         tmp[0] |= addr;
 177                         break;
 178                 case 1:
 179                         tmp[0] &= ~0xf8000000;
 180                         tmp[0] |= addr << 27;
 181                         tmp[1] &= ~0x003fffff;
 182                         tmp[1] |= addr >> 5;
 183                         break;
 184                 case 2:
 185                         tmp[1] &= ~0xffc00000;
 186                         tmp[1] |= addr << 22;
 187                         tmp[2] &= ~0x0001ffff;
 188                         tmp[2] |= addr >> 10;
 189                         break;
 190                 case 3:
 191                         tmp[2] &= ~0xfffe0000;
 192                         tmp[2] |= addr << 17;
 193                         tmp[3] &= ~0x00000fff;
 194                         tmp[3] |= addr >> 15;
 195                         break;
 196                 }
 197         }
 198
 199         tmp[3] |= 0x40000000;
 200
 201         nv_wo32(pgt, base + 0x0, tmp[0]);
 202         nv_wo32(pgt, base + 0x4, tmp[1]);
 203         nv_wo32(pgt, base + 0x8, tmp[2]);
 204         nv_wo32(pgt, base + 0xc, tmp[3]);
 205 }
 206
 207 static int
 208 nv44_sgdma_bind(struct ttm_tt *ttm, struct ttm_mem_reg *mem)
 209 {
 210         struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm;
 211         struct drm_nouveau_private *dev_priv = nvbe->dev->dev_private;
 212         struct nouveau_gpuobj *pgt = dev_priv->gart_info.sg_ctxdma;
 213         dma_addr_t *list = nvbe->ttm.dma_address;
 214         u32 pte = mem->start << 2, tmp[4];
 215         u32 cnt = ttm->num_pages;
 216         int i;
 217
 218         nvbe->offset = mem->start << PAGE_SHIFT;
 219
 220         if (pte & 0x0000000c) {
 221                 u32  max = 4 - ((pte >> 2) & 0x3);
 222                 u32 part = (cnt > max) ? max : cnt;
 223                 nv44_sgdma_fill(pgt, list, pte, part);
 224                 pte  += (part << 2);
 225                 list += part;
 226                 cnt  -= part;
 227         }
 228
 229         while (cnt >= 4) {
 230                 for (i = 0; i < 4; i++)
 231                         tmp[i] = *list++ >> 12;
 232                 nv_wo32(pgt, pte + 0x0, tmp[0] >>  0 | tmp[1] << 27);
 233                 nv_wo32(pgt, pte + 0x4, tmp[1] >>  5 | tmp[2] << 22);
 234                 nv_wo32(pgt, pte + 0x8, tmp[2] >> 10 | tmp[3] << 17);
 235                 nv_wo32(pgt, pte + 0xc, tmp[3] >> 15 | 0x40000000);
 236                 pte  += 0x10;
 237                 cnt  -= 4;
 238         }
 239
 240         if (cnt)
 241                 nv44_sgdma_fill(pgt, list, pte, cnt);
 242
 243         nv44_sgdma_flush(ttm);
 244         return 0;
 245 }
 246
 247 static int
 248 nv44_sgdma_unbind(struct ttm_tt *ttm)
 249 {
 250         struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm;
 251         struct drm_nouveau_private *dev_priv = nvbe->dev->dev_private;
 252         struct nouveau_gpuobj *pgt = dev_priv->gart_info.sg_ctxdma;
 253         u32 pte = (nvbe->offset >> 12) << 2;
 254         u32 cnt = ttm->num_pages;
 255
 256         if (pte & 0x0000000c) {
 257                 u32  max = 4 - ((pte >> 2) & 0x3);
 258                 u32 part = (cnt > max) ? max : cnt;
 259                 nv44_sgdma_fill(pgt, NULL, pte, part);
 260                 pte  += (part << 2);
 261                 cnt  -= part;
 262         }
 263
 264         while (cnt >= 4) {
 265                 nv_wo32(pgt, pte + 0x0, 0x00000000);
 266                 nv_wo32(pgt, pte + 0x4, 0x00000000);
 267                 nv_wo32(pgt, pte + 0x8, 0x00000000);
 268                 nv_wo32(pgt, pte + 0xc, 0x00000000);
 269                 pte  += 0x10;
 270                 cnt  -= 4;
 271         }
 272
 273         if (cnt)
 274                 nv44_sgdma_fill(pgt, NULL, pte, cnt);
 275
 276         nv44_sgdma_flush(ttm);
 277         return 0;
 278 }
 279
 280 static struct ttm_backend_func nv44_sgdma_backend = {
 281         .bind                   = nv44_sgdma_bind,
 282         .unbind                 = nv44_sgdma_unbind,
 283         .destroy                = nouveau_sgdma_destroy
 284 };
 285
 286 static int
 287 nv50_sgdma_bind(struct ttm_tt *ttm, struct ttm_mem_reg *mem)
 288 {
 289         struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm;
 290         struct nouveau_mem *node = mem->mm_node;
 291
 292         /* noop: bound in move_notify() */
 293         if (ttm->sg) {
 294                 node->sg = ttm->sg;
 295         } else
 296                 node->pages = nvbe->ttm.dma_address;
 297         return 0;
 298 }
 299
 300 static int
 301 nv50_sgdma_unbind(struct ttm_tt *ttm)
 302 {
 303         /* noop: unbound in move_notify() */
 304         return 0;
 305 }
 306
 307 static struct ttm_backend_func nv50_sgdma_backend = {
 308         .bind                   = nv50_sgdma_bind,
 309         .unbind                 = nv50_sgdma_unbind,
 310         .destroy                = nouveau_sgdma_destroy
 311 };
 312
 313 struct ttm_tt *
 314 nouveau_sgdma_create_ttm(struct ttm_bo_device *bdev,
 315                          unsigned long size, uint32_t page_flags,
 316                          struct page *dummy_read_page)
 317 {
 318         struct drm_nouveau_private *dev_priv = nouveau_bdev(bdev);
 319         struct drm_device *dev = dev_priv->dev;
 320         struct nouveau_sgdma_be *nvbe;
 321
 322         nvbe = kzalloc(sizeof(*nvbe), GFP_KERNEL);
 323         if (!nvbe)
 324                 return NULL;
 325
 326         nvbe->dev = dev;
 327         nvbe->ttm.ttm.func = dev_priv->gart_info.func;
 328
 329         if (ttm_dma_tt_init(&nvbe->ttm, bdev, size, page_flags, dummy_read_page)) {
 330                 kfree(nvbe);
 331                 return NULL;
 332         }
 333         return &nvbe->ttm.ttm;
 334 }
 335
 336 int
 337 nouveau_sgdma_init(struct drm_device *dev)
 338 {
 339         struct drm_nouveau_private *dev_priv = dev->dev_private;
 340         struct nouveau_gpuobj *gpuobj = NULL;
 341         u32 aper_size, align;
 342         int ret;
 343
 344         if (dev_priv->card_type >= NV_40)
 345                 aper_size = 512 * 1024 * 1024;
 346         else
 347                 aper_size = 128 * 1024 * 1024;
 348
 349         /* Dear NVIDIA, NV44+ would like proper present bits in PTEs for
 350          * christmas.  The cards before it have them, the cards after
 351          * it have them, why is NV44 so unloved?
 352          */
 353         dev_priv->gart_info.dummy.page = alloc_page(GFP_DMA32 | GFP_KERNEL);
 354         if (!dev_priv->gart_info.dummy.page)
 355                 return -ENOMEM;
 356
 357         dev_priv->gart_info.dummy.addr =
 358                 pci_map_page(dev->pdev, dev_priv->gart_info.dummy.page,
 359                              0, PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
 360         if (pci_dma_mapping_error(dev->pdev, dev_priv->gart_info.dummy.addr)) {
 361                 NV_ERROR(dev, "error mapping dummy page\n");
 362                 __free_page(dev_priv->gart_info.dummy.page);
 363                 dev_priv->gart_info.dummy.page = NULL;
 364                 return -ENOMEM;
 365         }
 366
 367         if (dev_priv->card_type >= NV_50) {
 368                 dev_priv->gart_info.aper_base = 0;
 369                 dev_priv->gart_info.aper_size = aper_size;
 370                 dev_priv->gart_info.type = NOUVEAU_GART_HW;
 371                 dev_priv->gart_info.func = &nv50_sgdma_backend;
 372         } else
 373         if (0 && pci_is_pcie(dev->pdev) &&
 374             dev_priv->chipset > 0x40 && dev_priv->chipset != 0x45) {
 375                 if (nv44_graph_class(dev)) {
 376                         dev_priv->gart_info.func = &nv44_sgdma_backend;
 377                         align = 512 * 1024;
 378                 } else {
 379                         dev_priv->gart_info.func = &nv41_sgdma_backend;
 380                         align = 16;
 381                 }
 382
 383                 ret = nouveau_gpuobj_new(dev, NULL, aper_size / 1024, align,
 384                                          NVOBJ_FLAG_ZERO_ALLOC |
 385                                          NVOBJ_FLAG_ZERO_FREE, &gpuobj);
 386                 if (ret) {
 387                         NV_ERROR(dev, "Error creating sgdma object: %d\n", ret);
 388                         return ret;
 389                 }
 390
 391                 dev_priv->gart_info.sg_ctxdma = gpuobj;
 392                 dev_priv->gart_info.aper_base = 0;
 393                 dev_priv->gart_info.aper_size = aper_size;
 394                 dev_priv->gart_info.type = NOUVEAU_GART_HW;
 395         } else {
 396                 ret = nouveau_gpuobj_new(dev, NULL, (aper_size / 1024) + 8, 16,
 397                                          NVOBJ_FLAG_ZERO_ALLOC |
 398                                          NVOBJ_FLAG_ZERO_FREE, &gpuobj);
 399                 if (ret) {
 400                         NV_ERROR(dev, "Error creating sgdma object: %d\n", ret);
 401                         return ret;
 402                 }
 403
 404                 nv_wo32(gpuobj, 0, NV_CLASS_DMA_IN_MEMORY |
 405                                    (1 << 12) /* PT present */ |
 406                                    (0 << 13) /* PT *not* linear */ |
 407                                    (0 << 14) /* RW */ |
 408                                    (2 << 16) /* PCI */);
 409                 nv_wo32(gpuobj, 4, aper_size - 1);
 410
 411                 dev_priv->gart_info.sg_ctxdma = gpuobj;
 412                 dev_priv->gart_info.aper_base = 0;
 413                 dev_priv->gart_info.aper_size = aper_size;
 414                 dev_priv->gart_info.type = NOUVEAU_GART_PDMA;
 415                 dev_priv->gart_info.func = &nv04_sgdma_backend;
 416         }
 417
 418         return 0;
 419 }
 420
 421 void
 422 nouveau_sgdma_takedown(struct drm_device *dev)
 423 {
 424         struct drm_nouveau_private *dev_priv = dev->dev_private;
 425
 426         nouveau_gpuobj_ref(NULL, &dev_priv->gart_info.sg_ctxdma);
 427
 428         if (dev_priv->gart_info.dummy.page) {
 429                 pci_unmap_page(dev->pdev, dev_priv->gart_info.dummy.addr,
 430                                PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
 431                 __free_page(dev_priv->gart_info.dummy.page);
 432                 dev_priv->gart_info.dummy.page = NULL;
 433         }
 434 }
 435
 436 uint32_t
 437 nouveau_sgdma_get_physical(struct drm_device *dev, uint32_t offset)
 438 {
 439         struct drm_nouveau_private *dev_priv = dev->dev_private;
 440         struct nouveau_gpuobj *gpuobj = dev_priv->gart_info.sg_ctxdma;
 441         int pte = (offset >> NV_CTXDMA_PAGE_SHIFT) + 2;
 442
 443         BUG_ON(dev_priv->card_type >= NV_50);
 444
 445         return (nv_ro32(gpuobj, 4 * pte) & ~NV_CTXDMA_PAGE_MASK) |
 446                 (offset & NV_CTXDMA_PAGE_MASK);
 447 }