drivers/gpu/drm/nouveau/nouveau_ttm.c

   1 // SPDX-License-Identifier: GPL-2.0 OR MIT
   2 /*
   3  * Copyright (c) 2007-2008 Tungsten Graphics, Inc., Cedar Park, TX., USA,
   4  * Copyright (c) 2009 VMware, Inc., Palo Alto, CA., USA,
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the "Software"),
   8  * to deal in the Software without restriction, including without limitation
   9  * the rights to use, copy, modify, merge, publish, distribute, sub license,
  10  * and/or sell copies of the Software, and to permit persons to whom the
  11  * Software is furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice (including the
  14  * next paragraph) shall be included in all copies or substantial portions
  15  * of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  20  * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
  21  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  22  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  23  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  24  */
  25
  26 #include <linux/limits.h>
  27 #include <linux/swiotlb.h>
  28
  29 #include "nouveau_drv.h"
  30 #include "nouveau_gem.h"
  31 #include "nouveau_mem.h"
  32 #include "nouveau_ttm.h"
  33
  34 #include <drm/drm_legacy.h>
  35
  36 #include <core/tegra.h>
  37
  38 static void
  39 nouveau_manager_del(struct ttm_resource_manager *man, struct ttm_resource *reg)
  40 {
  41         nouveau_mem_del(reg);
  42 }
  43
  44 static int
  45 nouveau_vram_manager_new(struct ttm_resource_manager *man,
  46                          struct ttm_buffer_object *bo,
  47                          const struct ttm_place *place,
  48                          struct ttm_resource *reg)
  49 {
  50         struct nouveau_bo *nvbo = nouveau_bo(bo);
  51         struct nouveau_drm *drm = nouveau_bdev(bo->bdev);
  52         int ret;
  53
  54         if (drm->client.device.info.ram_size == 0)
  55                 return -ENOMEM;
  56
  57         ret = nouveau_mem_new(&drm->master, nvbo->kind, nvbo->comp, reg);
  58         if (ret)
  59                 return ret;
  60
  61         ret = nouveau_mem_vram(reg, nvbo->contig, nvbo->page);
  62         if (ret) {
  63                 nouveau_mem_del(reg);
  64                 return ret;
  65         }
  66
  67         return 0;
  68 }
  69
  70 const struct ttm_resource_manager_func nouveau_vram_manager = {
  71         .alloc = nouveau_vram_manager_new,
  72         .free = nouveau_manager_del,
  73 };
  74
  75 static int
  76 nouveau_gart_manager_new(struct ttm_resource_manager *man,
  77                          struct ttm_buffer_object *bo,
  78                          const struct ttm_place *place,
  79                          struct ttm_resource *reg)
  80 {
  81         struct nouveau_bo *nvbo = nouveau_bo(bo);
  82         struct nouveau_drm *drm = nouveau_bdev(bo->bdev);
  83         int ret;
  84
  85         ret = nouveau_mem_new(&drm->master, nvbo->kind, nvbo->comp, reg);
  86         if (ret)
  87                 return ret;
  88
  89         reg->start = 0;
  90         return 0;
  91 }
  92
  93 const struct ttm_resource_manager_func nouveau_gart_manager = {
  94         .alloc = nouveau_gart_manager_new,
  95         .free = nouveau_manager_del,
  96 };
  97
  98 static int
  99 nv04_gart_manager_new(struct ttm_resource_manager *man,
 100                       struct ttm_buffer_object *bo,
 101                       const struct ttm_place *place,
 102                       struct ttm_resource *reg)
 103 {
 104         struct nouveau_bo *nvbo = nouveau_bo(bo);
 105         struct nouveau_drm *drm = nouveau_bdev(bo->bdev);
 106         struct nouveau_mem *mem;
 107         int ret;
 108
 109         ret = nouveau_mem_new(&drm->master, nvbo->kind, nvbo->comp, reg);
 110         mem = nouveau_mem(reg);
 111         if (ret)
 112                 return ret;
 113
 114         ret = nvif_vmm_get(&mem->cli->vmm.vmm, PTES, false, 12, 0,
 115                            (long)reg->num_pages << PAGE_SHIFT, &mem->vma[0]);
 116         if (ret) {
 117                 nouveau_mem_del(reg);
 118                 return ret;
 119         }
 120
 121         reg->start = mem->vma[0].addr >> PAGE_SHIFT;
 122         return 0;
 123 }
 124
 125 const struct ttm_resource_manager_func nv04_gart_manager = {
 126         .alloc = nv04_gart_manager_new,
 127         .free = nouveau_manager_del,
 128 };
 129
 130 static vm_fault_t nouveau_ttm_fault(struct vm_fault *vmf)
 131 {
 132         struct vm_area_struct *vma = vmf->vma;
 133         struct ttm_buffer_object *bo = vma->vm_private_data;
 134         pgprot_t prot;
 135         vm_fault_t ret;
 136
 137         ret = ttm_bo_vm_reserve(bo, vmf);
 138         if (ret)
 139                 return ret;
 140
 141         ret = nouveau_ttm_fault_reserve_notify(bo);
 142         if (ret)
 143                 goto error_unlock;
 144
 145         nouveau_bo_del_io_reserve_lru(bo);
 146         prot = vm_get_page_prot(vma->vm_flags);
 147         ret = ttm_bo_vm_fault_reserved(vmf, prot, TTM_BO_VM_NUM_PREFAULT, 1);
 148         nouveau_bo_add_io_reserve_lru(bo);
 149         if (ret == VM_FAULT_RETRY && !(vmf->flags & FAULT_FLAG_RETRY_NOWAIT))
 150                 return ret;
 151
 152 error_unlock:
 153         dma_resv_unlock(bo->base.resv);
 154         return ret;
 155 }
 156
 157 static struct vm_operations_struct nouveau_ttm_vm_ops = {
 158         .fault = nouveau_ttm_fault,
 159         .open = ttm_bo_vm_open,
 160         .close = ttm_bo_vm_close,
 161         .access = ttm_bo_vm_access
 162 };
 163
 164 int
 165 nouveau_ttm_mmap(struct file *filp, struct vm_area_struct *vma)
 166 {
 167         struct drm_file *file_priv = filp->private_data;
 168         struct nouveau_drm *drm = nouveau_drm(file_priv->minor->dev);
 169         int ret;
 170
 171         ret = ttm_bo_mmap(filp, vma, &drm->ttm.bdev);
 172         if (ret)
 173                 return ret;
 174
 175         vma->vm_ops = &nouveau_ttm_vm_ops;
 176         return 0;
 177 }
 178
 179 static int
 180 nouveau_ttm_init_host(struct nouveau_drm *drm, u8 kind)
 181 {
 182         struct nvif_mmu *mmu = &drm->client.mmu;
 183         int typei;
 184
 185         typei = nvif_mmu_type(mmu, NVIF_MEM_HOST | NVIF_MEM_MAPPABLE |
 186                                             kind | NVIF_MEM_COHERENT);
 187         if (typei < 0)
 188                 return -ENOSYS;
 189
 190         drm->ttm.type_host[!!kind] = typei;
 191
 192         typei = nvif_mmu_type(mmu, NVIF_MEM_HOST | NVIF_MEM_MAPPABLE | kind);
 193         if (typei < 0)
 194                 return -ENOSYS;
 195
 196         drm->ttm.type_ncoh[!!kind] = typei;
 197         return 0;
 198 }
 199
 200 static int
 201 nouveau_ttm_init_vram(struct nouveau_drm *drm)
 202 {
 203         if (drm->client.device.info.family >= NV_DEVICE_INFO_V0_TESLA) {
 204                 struct ttm_resource_manager *man = kzalloc(sizeof(*man), GFP_KERNEL);
 205
 206                 if (!man)
 207                         return -ENOMEM;
 208
 209                 man->func = &nouveau_vram_manager;
 210
 211                 ttm_resource_manager_init(man,
 212                                           drm->gem.vram_available >> PAGE_SHIFT);
 213                 ttm_set_driver_manager(&drm->ttm.bdev, TTM_PL_VRAM, man);
 214                 ttm_resource_manager_set_used(man, true);
 215                 return 0;
 216         } else {
 217                 return ttm_range_man_init(&drm->ttm.bdev, TTM_PL_VRAM, false,
 218                                           drm->gem.vram_available >> PAGE_SHIFT);
 219         }
 220 }
 221
 222 static void
 223 nouveau_ttm_fini_vram(struct nouveau_drm *drm)
 224 {
 225         struct ttm_resource_manager *man = ttm_manager_type(&drm->ttm.bdev, TTM_PL_VRAM);
 226
 227         if (drm->client.device.info.family >= NV_DEVICE_INFO_V0_TESLA) {
 228                 ttm_resource_manager_set_used(man, false);
 229                 ttm_resource_manager_evict_all(&drm->ttm.bdev, man);
 230                 ttm_resource_manager_cleanup(man);
 231                 ttm_set_driver_manager(&drm->ttm.bdev, TTM_PL_VRAM, NULL);
 232                 kfree(man);
 233         } else
 234                 ttm_range_man_fini(&drm->ttm.bdev, TTM_PL_VRAM);
 235 }
 236
 237 static int
 238 nouveau_ttm_init_gtt(struct nouveau_drm *drm)
 239 {
 240         struct ttm_resource_manager *man;
 241         unsigned long size_pages = drm->gem.gart_available >> PAGE_SHIFT;
 242         const struct ttm_resource_manager_func *func = NULL;
 243
 244         if (drm->client.device.info.family >= NV_DEVICE_INFO_V0_TESLA)
 245                 func = &nouveau_gart_manager;
 246         else if (!drm->agp.bridge)
 247                 func = &nv04_gart_manager;
 248         else
 249                 return ttm_range_man_init(&drm->ttm.bdev, TTM_PL_TT, true,
 250                                           size_pages);
 251
 252         man = kzalloc(sizeof(*man), GFP_KERNEL);
 253         if (!man)
 254                 return -ENOMEM;
 255
 256         man->func = func;
 257         man->use_tt = true;
 258         ttm_resource_manager_init(man, size_pages);
 259         ttm_set_driver_manager(&drm->ttm.bdev, TTM_PL_TT, man);
 260         ttm_resource_manager_set_used(man, true);
 261         return 0;
 262 }
 263
 264 static void
 265 nouveau_ttm_fini_gtt(struct nouveau_drm *drm)
 266 {
 267         struct ttm_resource_manager *man = ttm_manager_type(&drm->ttm.bdev, TTM_PL_TT);
 268
 269         if (drm->client.device.info.family < NV_DEVICE_INFO_V0_TESLA &&
 270             drm->agp.bridge)
 271                 ttm_range_man_fini(&drm->ttm.bdev, TTM_PL_TT);
 272         else {
 273                 ttm_resource_manager_set_used(man, false);
 274                 ttm_resource_manager_evict_all(&drm->ttm.bdev, man);
 275                 ttm_resource_manager_cleanup(man);
 276                 ttm_set_driver_manager(&drm->ttm.bdev, TTM_PL_TT, NULL);
 277                 kfree(man);
 278         }
 279 }
 280
 281 int
 282 nouveau_ttm_init(struct nouveau_drm *drm)
 283 {
 284         struct nvkm_device *device = nvxx_device(&drm->client.device);
 285         struct nvkm_pci *pci = device->pci;
 286         struct nvif_mmu *mmu = &drm->client.mmu;
 287         struct drm_device *dev = drm->dev;
 288         bool need_swiotlb = false;
 289         int typei, ret;
 290
 291         ret = nouveau_ttm_init_host(drm, 0);
 292         if (ret)
 293                 return ret;
 294
 295         if (drm->client.device.info.family >= NV_DEVICE_INFO_V0_TESLA &&
 296             drm->client.device.info.chipset != 0x50) {
 297                 ret = nouveau_ttm_init_host(drm, NVIF_MEM_KIND);
 298                 if (ret)
 299                         return ret;
 300         }
 301
 302         if (drm->client.device.info.platform != NV_DEVICE_INFO_V0_SOC &&
 303             drm->client.device.info.family >= NV_DEVICE_INFO_V0_TESLA) {
 304                 typei = nvif_mmu_type(mmu, NVIF_MEM_VRAM | NVIF_MEM_MAPPABLE |
 305                                            NVIF_MEM_KIND |
 306                                            NVIF_MEM_COMP |
 307                                            NVIF_MEM_DISP);
 308                 if (typei < 0)
 309                         return -ENOSYS;
 310
 311                 drm->ttm.type_vram = typei;
 312         } else {
 313                 drm->ttm.type_vram = -1;
 314         }
 315
 316         if (pci && pci->agp.bridge) {
 317                 drm->agp.bridge = pci->agp.bridge;
 318                 drm->agp.base = pci->agp.base;
 319                 drm->agp.size = pci->agp.size;
 320                 drm->agp.cma = pci->agp.cma;
 321         }
 322
 323 #if IS_ENABLED(CONFIG_SWIOTLB) && IS_ENABLED(CONFIG_X86)
 324         need_swiotlb = !!swiotlb_nr_tbl();
 325 #endif
 326
 327         ret = ttm_bo_device_init(&drm->ttm.bdev, &nouveau_bo_driver,
 328                                  drm->dev->dev, dev->anon_inode->i_mapping,
 329                                  dev->vma_offset_manager, need_swiotlb,
 330                                  drm->client.mmu.dmabits <= 32);
 331         if (ret) {
 332                 NV_ERROR(drm, "error initialising bo driver, %d\n", ret);
 333                 return ret;
 334         }
 335
 336         /* VRAM init */
 337         drm->gem.vram_available = drm->client.device.info.ram_user;
 338
 339         arch_io_reserve_memtype_wc(device->func->resource_addr(device, 1),
 340                                    device->func->resource_size(device, 1));
 341
 342         ret = nouveau_ttm_init_vram(drm);
 343         if (ret) {
 344                 NV_ERROR(drm, "VRAM mm init failed, %d\n", ret);
 345                 return ret;
 346         }
 347
 348         drm->ttm.mtrr = arch_phys_wc_add(device->func->resource_addr(device, 1),
 349                                          device->func->resource_size(device, 1));
 350
 351         /* GART init */
 352         if (!drm->agp.bridge) {
 353                 drm->gem.gart_available = drm->client.vmm.vmm.limit;
 354         } else {
 355                 drm->gem.gart_available = drm->agp.size;
 356         }
 357
 358         ret = nouveau_ttm_init_gtt(drm);
 359         if (ret) {
 360                 NV_ERROR(drm, "GART mm init failed, %d\n", ret);
 361                 return ret;
 362         }
 363
 364         mutex_init(&drm->ttm.io_reserve_mutex);
 365         INIT_LIST_HEAD(&drm->ttm.io_reserve_lru);
 366
 367         NV_INFO(drm, "VRAM: %d MiB\n", (u32)(drm->gem.vram_available >> 20));
 368         NV_INFO(drm, "GART: %d MiB\n", (u32)(drm->gem.gart_available >> 20));
 369         return 0;
 370 }
 371
 372 void
 373 nouveau_ttm_fini(struct nouveau_drm *drm)
 374 {
 375         struct nvkm_device *device = nvxx_device(&drm->client.device);
 376
 377         nouveau_ttm_fini_vram(drm);
 378         nouveau_ttm_fini_gtt(drm);
 379
 380         ttm_bo_device_release(&drm->ttm.bdev);
 381
 382         arch_phys_wc_del(drm->ttm.mtrr);
 383         drm->ttm.mtrr = 0;
 384         arch_io_free_memtype_wc(device->func->resource_addr(device, 1),
 385                                 device->func->resource_size(device, 1));
 386
 387 }