LXR linux/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/uvmm.c

   1/*
   2 * Copyright 2017 Red Hat Inc.
   3 *
   4 * Permission is hereby granted, free of charge, to any person obtaining a
   5 * copy of this software and associated documentation files (the "Software"),
   6 * to deal in the Software without restriction, including without limitation
   7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8 * and/or sell copies of the Software, and to permit persons to whom the
   9 * Software is furnished to do so, subject to the following conditions:
  10 *
  11 * The above copyright notice and this permission notice shall be included in
  12 * all copies or substantial portions of the Software.
  13 *
  14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  20 * OTHER DEALINGS IN THE SOFTWARE.
  21 */
  22#include "uvmm.h"
  23#include "umem.h"
  24#include "ummu.h"
  25
  26#include <core/client.h>
  27#include <core/memory.h>
  28
  29#include <nvif/if000c.h>
  30#include <nvif/unpack.h>
  31
  32static const struct nvkm_object_func nvkm_uvmm;
  33struct nvkm_vmm *
  34nvkm_uvmm_search(struct nvkm_client *client, u64 handle)
  35{
  36        struct nvkm_object *object;
  37
  38        object = nvkm_object_search(client, handle, &nvkm_uvmm);
  39        if (IS_ERR(object))
  40                return (void *)object;
  41
  42        return nvkm_uvmm(object)->vmm;
  43}
  44
  45static int
  46nvkm_uvmm_mthd_pfnclr(struct nvkm_uvmm *uvmm, void *argv, u32 argc)
  47{
  48        struct nvkm_client *client = uvmm->object.client;
  49        union {
  50                struct nvif_vmm_pfnclr_v0 v0;
  51        } *args = argv;
  52        struct nvkm_vmm *vmm = uvmm->vmm;
  53        int ret = -ENOSYS;
  54        u64 addr, size;
  55
  56        if (!(ret = nvif_unpack(ret, &argv, &argc, args->v0, 0, 0, false))) {
  57                addr = args->v0.addr;
  58                size = args->v0.size;
  59        } else
  60                return ret;
  61
  62        if (!client->super)
  63                return -ENOENT;
  64
  65        if (size) {
  66                mutex_lock(&vmm->mutex);
  67                ret = nvkm_vmm_pfn_unmap(vmm, addr, size);
  68                mutex_unlock(&vmm->mutex);
  69        }
  70
  71        return ret;
  72}
  73
  74static int
  75nvkm_uvmm_mthd_pfnmap(struct nvkm_uvmm *uvmm, void *argv, u32 argc)
  76{
  77        struct nvkm_client *client = uvmm->object.client;
  78        union {
  79                struct nvif_vmm_pfnmap_v0 v0;
  80        } *args = argv;
  81        struct nvkm_vmm *vmm = uvmm->vmm;
  82        int ret = -ENOSYS;
  83        u64 addr, size, *phys;
  84        u8  page;
  85
  86        if (!(ret = nvif_unpack(ret, &argv, &argc, args->v0, 0, 0, true))) {
  87                page = args->v0.page;
  88                addr = args->v0.addr;
  89                size = args->v0.size;
  90                phys = args->v0.phys;
  91                if (argc != (size >> page) * sizeof(args->v0.phys[0]))
  92                        return -EINVAL;
  93        } else
  94                return ret;
  95
  96        if (!client->super)
  97                return -ENOENT;
  98
  99        if (size) {
 100                mutex_lock(&vmm->mutex);
 101                ret = nvkm_vmm_pfn_map(vmm, page, addr, size, phys);
 102                mutex_unlock(&vmm->mutex);
 103        }
 104
 105        return ret;
 106}
 107
 108static int
 109nvkm_uvmm_mthd_unmap(struct nvkm_uvmm *uvmm, void *argv, u32 argc)
 110{
 111        struct nvkm_client *client = uvmm->object.client;
 112        union {
 113                struct nvif_vmm_unmap_v0 v0;
 114        } *args = argv;
 115        struct nvkm_vmm *vmm = uvmm->vmm;
 116        struct nvkm_vma *vma;
 117        int ret = -ENOSYS;
 118        u64 addr;
 119
 120        if (!(ret = nvif_unpack(ret, &argv, &argc, args->v0, 0, 0, false))) {
 121                addr = args->v0.addr;
 122        } else
 123                return ret;
 124
 125        mutex_lock(&vmm->mutex);
 126        vma = nvkm_vmm_node_search(vmm, addr);
 127        if (ret = -ENOENT, !vma || vma->addr != addr) {
 128                VMM_DEBUG(vmm, "lookup %016llx: %016llx",
 129                          addr, vma ? vma->addr : ~0ULL);
 130                goto done;
 131        }
 132
 133        if (ret = -ENOENT, (!vma->user && !client->super) || vma->busy) {
 134                VMM_DEBUG(vmm, "denied %016llx: %d %d %d", addr,
 135                          vma->user, !client->super, vma->busy);
 136                goto done;
 137        }
 138
 139        if (ret = -EINVAL, !vma->memory) {
 140                VMM_DEBUG(vmm, "unmapped");
 141                goto done;
 142        }
 143
 144        nvkm_vmm_unmap_locked(vmm, vma, false);
 145        ret = 0;
 146done:
 147        mutex_unlock(&vmm->mutex);
 148        return ret;
 149}
 150
 151static int
 152nvkm_uvmm_mthd_map(struct nvkm_uvmm *uvmm, void *argv, u32 argc)
 153{
 154        struct nvkm_client *client = uvmm->object.client;
 155        union {
 156                struct nvif_vmm_map_v0 v0;
 157        } *args = argv;
 158        u64 addr, size, handle, offset;
 159        struct nvkm_vmm *vmm = uvmm->vmm;
 160        struct nvkm_vma *vma;
 161        struct nvkm_memory *memory;
 162        int ret = -ENOSYS;
 163
 164        if (!(ret = nvif_unpack(ret, &argv, &argc, args->v0, 0, 0, true))) {
 165                addr = args->v0.addr;
 166                size = args->v0.size;
 167                handle = args->v0.memory;
 168                offset = args->v0.offset;
 169        } else
 170                return ret;
 171
 172        memory = nvkm_umem_search(client, handle);
 173        if (IS_ERR(memory)) {
 174                VMM_DEBUG(vmm, "memory %016llx %ld\n", handle, PTR_ERR(memory));
 175                return PTR_ERR(memory);
 176        }
 177
 178        mutex_lock(&vmm->mutex);
 179        if (ret = -ENOENT, !(vma = nvkm_vmm_node_search(vmm, addr))) {
 180                VMM_DEBUG(vmm, "lookup %016llx", addr);
 181                goto fail;
 182        }
 183
 184        if (ret = -ENOENT, (!vma->user && !client->super) || vma->busy) {
 185                VMM_DEBUG(vmm, "denied %016llx: %d %d %d", addr,
 186                          vma->user, !client->super, vma->busy);
 187                goto fail;
 188        }
 189
 190        if (ret = -EINVAL, vma->mapped && !vma->memory) {
 191                VMM_DEBUG(vmm, "pfnmap %016llx", addr);
 192                goto fail;
 193        }
 194
 195        if (ret = -EINVAL, vma->addr != addr || vma->size != size) {
 196                if (addr + size > vma->addr + vma->size || vma->memory ||
 197                    (vma->refd == NVKM_VMA_PAGE_NONE && !vma->mapref)) {
 198                        VMM_DEBUG(vmm, "split %d %d %d "
 199                                       "%016llx %016llx %016llx %016llx",
 200                                  !!vma->memory, vma->refd, vma->mapref,
 201                                  addr, size, vma->addr, (u64)vma->size);
 202                        goto fail;
 203                }
 204
 205                vma = nvkm_vmm_node_split(vmm, vma, addr, size);
 206                if (!vma) {
 207                        ret = -ENOMEM;
 208                        goto fail;
 209                }
 210        }
 211        vma->busy = true;
 212        mutex_unlock(&vmm->mutex);
 213
 214        ret = nvkm_memory_map(memory, offset, vmm, vma, argv, argc);
 215        if (ret == 0) {
 216                /* Successful map will clear vma->busy. */
 217                nvkm_memory_unref(&memory);
 218                return 0;
 219        }
 220
 221        mutex_lock(&vmm->mutex);
 222        vma->busy = false;
 223        nvkm_vmm_unmap_region(vmm, vma);
 224fail:
 225        mutex_unlock(&vmm->mutex);
 226        nvkm_memory_unref(&memory);
 227        return ret;
 228}
 229
 230static int
 231nvkm_uvmm_mthd_put(struct nvkm_uvmm *uvmm, void *argv, u32 argc)
 232{
 233        struct nvkm_client *client = uvmm->object.client;
 234        union {
 235                struct nvif_vmm_put_v0 v0;
 236        } *args = argv;
 237        struct nvkm_vmm *vmm = uvmm->vmm;
 238        struct nvkm_vma *vma;
 239        int ret = -ENOSYS;
 240        u64 addr;
 241
 242        if (!(ret = nvif_unpack(ret, &argv, &argc, args->v0, 0, 0, false))) {
 243                addr = args->v0.addr;
 244        } else
 245                return ret;
 246
 247        mutex_lock(&vmm->mutex);
 248        vma = nvkm_vmm_node_search(vmm, args->v0.addr);
 249        if (ret = -ENOENT, !vma || vma->addr != addr || vma->part) {
 250                VMM_DEBUG(vmm, "lookup %016llx: %016llx %d", addr,
 251                          vma ? vma->addr : ~0ULL, vma ? vma->part : 0);
 252                goto done;
 253        }
 254
 255        if (ret = -ENOENT, (!vma->user && !client->super) || vma->busy) {
 256                VMM_DEBUG(vmm, "denied %016llx: %d %d %d", addr,
 257                          vma->user, !client->super, vma->busy);
 258                goto done;
 259        }
 260
 261        nvkm_vmm_put_locked(vmm, vma);
 262        ret = 0;
 263done:
 264        mutex_unlock(&vmm->mutex);
 265        return ret;
 266}
 267
 268static int
 269nvkm_uvmm_mthd_get(struct nvkm_uvmm *uvmm, void *argv, u32 argc)
 270{
 271        struct nvkm_client *client = uvmm->object.client;
 272        union {
 273                struct nvif_vmm_get_v0 v0;
 274        } *args = argv;
 275        struct nvkm_vmm *vmm = uvmm->vmm;
 276        struct nvkm_vma *vma;
 277        int ret = -ENOSYS;
 278        bool getref, mapref, sparse;
 279        u8 page, align;
 280        u64 size;
 281
 282        if (!(ret = nvif_unpack(ret, &argv, &argc, args->v0, 0, 0, false))) {
 283                getref = args->v0.type == NVIF_VMM_GET_V0_PTES;
 284                mapref = args->v0.type == NVIF_VMM_GET_V0_ADDR;
 285                sparse = args->v0.sparse;
 286                page = args->v0.page;
 287                align = args->v0.align;
 288                size = args->v0.size;
 289        } else
 290                return ret;
 291
 292        mutex_lock(&vmm->mutex);
 293        ret = nvkm_vmm_get_locked(vmm, getref, mapref, sparse,
 294                                  page, align, size, &vma);
 295        mutex_unlock(&vmm->mutex);
 296        if (ret)
 297                return ret;
 298
 299        args->v0.addr = vma->addr;
 300        vma->user = !client->super;
 301        return ret;
 302}
 303
 304static int
 305nvkm_uvmm_mthd_page(struct nvkm_uvmm *uvmm, void *argv, u32 argc)
 306{
 307        union {
 308                struct nvif_vmm_page_v0 v0;
 309        } *args = argv;
 310        const struct nvkm_vmm_page *page;
 311        int ret = -ENOSYS;
 312        u8 type, index, nr;
 313
 314        page = uvmm->vmm->func->page;
 315        for (nr = 0; page[nr].shift; nr++);
 316
 317        if (!(ret = nvif_unpack(ret, &argv, &argc, args->v0, 0, 0, false))) {
 318                if ((index = args->v0.index) >= nr)
 319                        return -EINVAL;
 320                type = page[index].type;
 321                args->v0.shift = page[index].shift;
 322                args->v0.sparse = !!(type & NVKM_VMM_PAGE_SPARSE);
 323                args->v0.vram = !!(type & NVKM_VMM_PAGE_VRAM);
 324                args->v0.host = !!(type & NVKM_VMM_PAGE_HOST);
 325                args->v0.comp = !!(type & NVKM_VMM_PAGE_COMP);
 326        } else
 327                return -ENOSYS;
 328
 329        return 0;
 330}
 331
 332static int
 333nvkm_uvmm_mthd(struct nvkm_object *object, u32 mthd, void *argv, u32 argc)
 334{
 335        struct nvkm_uvmm *uvmm = nvkm_uvmm(object);
 336        switch (mthd) {
 337        case NVIF_VMM_V0_PAGE  : return nvkm_uvmm_mthd_page  (uvmm, argv, argc);
 338        case NVIF_VMM_V0_GET   : return nvkm_uvmm_mthd_get   (uvmm, argv, argc);
 339        case NVIF_VMM_V0_PUT   : return nvkm_uvmm_mthd_put   (uvmm, argv, argc);
 340        case NVIF_VMM_V0_MAP   : return nvkm_uvmm_mthd_map   (uvmm, argv, argc);
 341        case NVIF_VMM_V0_UNMAP : return nvkm_uvmm_mthd_unmap (uvmm, argv, argc);
 342        case NVIF_VMM_V0_PFNMAP: return nvkm_uvmm_mthd_pfnmap(uvmm, argv, argc);
 343        case NVIF_VMM_V0_PFNCLR: return nvkm_uvmm_mthd_pfnclr(uvmm, argv, argc);
 344        case NVIF_VMM_V0_MTHD(0x00) ... NVIF_VMM_V0_MTHD(0x7f):
 345                if (uvmm->vmm->func->mthd) {
 346                        return uvmm->vmm->func->mthd(uvmm->vmm,
 347                                                     uvmm->object.client,
 348                                                     mthd, argv, argc);
 349                }
 350                break;
 351        default:
 352                break;
 353        }
 354        return -EINVAL;
 355}
 356
 357static void *
 358nvkm_uvmm_dtor(struct nvkm_object *object)
 359{
 360        struct nvkm_uvmm *uvmm = nvkm_uvmm(object);
 361        nvkm_vmm_unref(&uvmm->vmm);
 362        return uvmm;
 363}
 364
 365static const struct nvkm_object_func
 366nvkm_uvmm = {
 367        .dtor = nvkm_uvmm_dtor,
 368        .mthd = nvkm_uvmm_mthd,
 369};
 370
 371int
 372nvkm_uvmm_new(const struct nvkm_oclass *oclass, void *argv, u32 argc,
 373              struct nvkm_object **pobject)
 374{
 375        struct nvkm_mmu *mmu = nvkm_ummu(oclass->parent)->mmu;
 376        const bool more = oclass->base.maxver >= 0;
 377        union {
 378                struct nvif_vmm_v0 v0;
 379        } *args = argv;
 380        const struct nvkm_vmm_page *page;
 381        struct nvkm_uvmm *uvmm;
 382        int ret = -ENOSYS;
 383        u64 addr, size;
 384        bool managed;
 385
 386        if (!(ret = nvif_unpack(ret, &argv, &argc, args->v0, 0, 0, more))) {
 387                managed = args->v0.managed != 0;
 388                addr = args->v0.addr;
 389                size = args->v0.size;
 390        } else
 391                return ret;
 392
 393        if (!(uvmm = kzalloc(sizeof(*uvmm), GFP_KERNEL)))
 394                return -ENOMEM;
 395        nvkm_object_ctor(&nvkm_uvmm, oclass, &uvmm->object);
 396        *pobject = &uvmm->object;
 397
 398        if (!mmu->vmm) {
 399                ret = mmu->func->vmm.ctor(mmu, managed, addr, size, argv, argc,
 400                                          NULL, "user", &uvmm->vmm);
 401                if (ret)
 402                        return ret;
 403
 404                uvmm->vmm->debug = max(uvmm->vmm->debug, oclass->client->debug);
 405        } else {
 406                if (size)
 407                        return -EINVAL;
 408
 409                uvmm->vmm = nvkm_vmm_ref(mmu->vmm);
 410        }
 411
 412        page = uvmm->vmm->func->page;
 413        args->v0.page_nr = 0;
 414        while (page && (page++)->shift)
 415                args->v0.page_nr++;
 416        args->v0.addr = uvmm->vmm->start;
 417        args->v0.size = uvmm->vmm->limit;
 418        return 0;
 419}
 420