drivers/gpu/drm/nouveau/nvkm/subdev/mmu/ummu.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 "ummu.h"
  23 #include "umem.h"
  24 #include "uvmm.h"
  25
  26 #include <core/client.h>
  27
  28 #include <nvif/if0008.h>
  29 #include <nvif/unpack.h>
  30
  31 static int
  32 nvkm_ummu_sclass(struct nvkm_object *object, int index,
  33                  struct nvkm_oclass *oclass)
  34 {
  35         struct nvkm_mmu *mmu = nvkm_ummu(object)->mmu;
  36
  37         if (mmu->func->mem.user.oclass && oclass->client->super) {
  38                 if (index-- == 0) {
  39                         oclass->base = mmu->func->mem.user;
  40                         oclass->ctor = nvkm_umem_new;
  41                         return 0;
  42                 }
  43         }
  44
  45         if (mmu->func->vmm.user.oclass) {
  46                 if (index-- == 0) {
  47                         oclass->base = mmu->func->vmm.user;
  48                         oclass->ctor = nvkm_uvmm_new;
  49                         return 0;
  50                 }
  51         }
  52
  53         return -EINVAL;
  54 }
  55
  56 static int
  57 nvkm_ummu_heap(struct nvkm_ummu *ummu, void *argv, u32 argc)
  58 {
  59         struct nvkm_mmu *mmu = ummu->mmu;
  60         union {
  61                 struct nvif_mmu_heap_v0 v0;
  62         } *args = argv;
  63         int ret = -ENOSYS;
  64         u8 index;
  65
  66         if (!(ret = nvif_unpack(ret, &argv, &argc, args->v0, 0, 0, false))) {
  67                 if ((index = args->v0.index) >= mmu->heap_nr)
  68                         return -EINVAL;
  69                 args->v0.size = mmu->heap[index].size;
  70         } else
  71                 return ret;
  72
  73         return 0;
  74 }
  75
  76 static int
  77 nvkm_ummu_type(struct nvkm_ummu *ummu, void *argv, u32 argc)
  78 {
  79         struct nvkm_mmu *mmu = ummu->mmu;
  80         union {
  81                 struct nvif_mmu_type_v0 v0;
  82         } *args = argv;
  83         int ret = -ENOSYS;
  84         u8 type, index;
  85
  86         if (!(ret = nvif_unpack(ret, &argv, &argc, args->v0, 0, 0, false))) {
  87                 if ((index = args->v0.index) >= mmu->type_nr)
  88                         return -EINVAL;
  89                 type = mmu->type[index].type;
  90                 args->v0.heap = mmu->type[index].heap;
  91                 args->v0.vram = !!(type & NVKM_MEM_VRAM);
  92                 args->v0.host = !!(type & NVKM_MEM_HOST);
  93                 args->v0.comp = !!(type & NVKM_MEM_COMP);
  94                 args->v0.disp = !!(type & NVKM_MEM_DISP);
  95                 args->v0.kind = !!(type & NVKM_MEM_KIND);
  96                 args->v0.mappable = !!(type & NVKM_MEM_MAPPABLE);
  97                 args->v0.coherent = !!(type & NVKM_MEM_COHERENT);
  98                 args->v0.uncached = !!(type & NVKM_MEM_UNCACHED);
  99         } else
 100                 return ret;
 101
 102         return 0;
 103 }
 104
 105 static int
 106 nvkm_ummu_kind(struct nvkm_ummu *ummu, void *argv, u32 argc)
 107 {
 108         struct nvkm_mmu *mmu = ummu->mmu;
 109         union {
 110                 struct nvif_mmu_kind_v0 v0;
 111         } *args = argv;
 112         const u8 *kind = NULL;
 113         int ret = -ENOSYS, count = 0;
 114         u8 kind_inv = 0;
 115
 116         if (mmu->func->kind)
 117                 kind = mmu->func->kind(mmu, &count, &kind_inv);
 118
 119         if (!(ret = nvif_unpack(ret, &argv, &argc, args->v0, 0, 0, true))) {
 120                 if (argc != args->v0.count * sizeof(*args->v0.data))
 121                         return -EINVAL;
 122                 if (args->v0.count > count)
 123                         return -EINVAL;
 124                 args->v0.kind_inv = kind_inv;
 125                 memcpy(args->v0.data, kind, args->v0.count);
 126         } else
 127                 return ret;
 128
 129         return 0;
 130 }
 131
 132 static int
 133 nvkm_ummu_mthd(struct nvkm_object *object, u32 mthd, void *argv, u32 argc)
 134 {
 135         struct nvkm_ummu *ummu = nvkm_ummu(object);
 136         switch (mthd) {
 137         case NVIF_MMU_V0_HEAP: return nvkm_ummu_heap(ummu, argv, argc);
 138         case NVIF_MMU_V0_TYPE: return nvkm_ummu_type(ummu, argv, argc);
 139         case NVIF_MMU_V0_KIND: return nvkm_ummu_kind(ummu, argv, argc);
 140         default:
 141                 break;
 142         }
 143         return -EINVAL;
 144 }
 145
 146 static const struct nvkm_object_func
 147 nvkm_ummu = {
 148         .mthd = nvkm_ummu_mthd,
 149         .sclass = nvkm_ummu_sclass,
 150 };
 151
 152 int
 153 nvkm_ummu_new(struct nvkm_device *device, const struct nvkm_oclass *oclass,
 154               void *argv, u32 argc, struct nvkm_object **pobject)
 155 {
 156         union {
 157                 struct nvif_mmu_v0 v0;
 158         } *args = argv;
 159         struct nvkm_mmu *mmu = device->mmu;
 160         struct nvkm_ummu *ummu;
 161         int ret = -ENOSYS, kinds = 0;
 162         u8 unused = 0;
 163
 164         if (mmu->func->kind)
 165                 mmu->func->kind(mmu, &kinds, &unused);
 166
 167         if (!(ret = nvif_unpack(ret, &argv, &argc, args->v0, 0, 0, false))) {
 168                 args->v0.dmabits = mmu->dma_bits;
 169                 args->v0.heap_nr = mmu->heap_nr;
 170                 args->v0.type_nr = mmu->type_nr;
 171                 args->v0.kind_nr = kinds;
 172         } else
 173                 return ret;
 174
 175         if (!(ummu = kzalloc(sizeof(*ummu), GFP_KERNEL)))
 176                 return -ENOMEM;
 177         nvkm_object_ctor(&nvkm_ummu, oclass, &ummu->object);
 178         ummu->mmu = mmu;
 179         *pobject = &ummu->object;
 180         return 0;
 181 }