drivers/gpu/drm/nouveau/nvif/mmu.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 <nvif/mmu.h>
  23
  24 #include <nvif/class.h>
  25 #include <nvif/if0008.h>
  26
  27 void
  28 nvif_mmu_fini(struct nvif_mmu *mmu)
  29 {
  30         kfree(mmu->kind);
  31         kfree(mmu->type);
  32         kfree(mmu->heap);
  33         nvif_object_fini(&mmu->object);
  34 }
  35
  36 int
  37 nvif_mmu_init(struct nvif_object *parent, s32 oclass, struct nvif_mmu *mmu)
  38 {
  39         static const struct nvif_mclass mems[] = {
  40                 { NVIF_CLASS_MEM_GF100, -1 },
  41                 { NVIF_CLASS_MEM_NV50 , -1 },
  42                 { NVIF_CLASS_MEM_NV04 , -1 },
  43                 {}
  44         };
  45         struct nvif_mmu_v0 args;
  46         int ret, i;
  47
  48         args.version = 0;
  49         mmu->heap = NULL;
  50         mmu->type = NULL;
  51         mmu->kind = NULL;
  52
  53         ret = nvif_object_init(parent, 0, oclass, &args, sizeof(args),
  54                                &mmu->object);
  55         if (ret)
  56                 goto done;
  57
  58         mmu->dmabits = args.dmabits;
  59         mmu->heap_nr = args.heap_nr;
  60         mmu->type_nr = args.type_nr;
  61         mmu->kind_nr = args.kind_nr;
  62
  63         ret = nvif_mclass(&mmu->object, mems);
  64         if (ret < 0)
  65                 goto done;
  66         mmu->mem = mems[ret].oclass;
  67
  68         mmu->heap = kmalloc_array(mmu->heap_nr, sizeof(*mmu->heap),
  69                                   GFP_KERNEL);
  70         mmu->type = kmalloc_array(mmu->type_nr, sizeof(*mmu->type),
  71                                   GFP_KERNEL);
  72         if (ret = -ENOMEM, !mmu->heap || !mmu->type)
  73                 goto done;
  74
  75         mmu->kind = kmalloc_array(mmu->kind_nr, sizeof(*mmu->kind),
  76                                   GFP_KERNEL);
  77         if (!mmu->kind && mmu->kind_nr)
  78                 goto done;
  79
  80         for (i = 0; i < mmu->heap_nr; i++) {
  81                 struct nvif_mmu_heap_v0 args = { .index = i };
  82
  83                 ret = nvif_object_mthd(&mmu->object, NVIF_MMU_V0_HEAP,
  84                                        &args, sizeof(args));
  85                 if (ret)
  86                         goto done;
  87
  88                 mmu->heap[i].size = args.size;
  89         }
  90
  91         for (i = 0; i < mmu->type_nr; i++) {
  92                 struct nvif_mmu_type_v0 args = { .index = i };
  93
  94                 ret = nvif_object_mthd(&mmu->object, NVIF_MMU_V0_TYPE,
  95                                        &args, sizeof(args));
  96                 if (ret)
  97                         goto done;
  98
  99                 mmu->type[i].type = 0;
 100                 if (args.vram) mmu->type[i].type |= NVIF_MEM_VRAM;
 101                 if (args.host) mmu->type[i].type |= NVIF_MEM_HOST;
 102                 if (args.comp) mmu->type[i].type |= NVIF_MEM_COMP;
 103                 if (args.disp) mmu->type[i].type |= NVIF_MEM_DISP;
 104                 if (args.kind    ) mmu->type[i].type |= NVIF_MEM_KIND;
 105                 if (args.mappable) mmu->type[i].type |= NVIF_MEM_MAPPABLE;
 106                 if (args.coherent) mmu->type[i].type |= NVIF_MEM_COHERENT;
 107                 if (args.uncached) mmu->type[i].type |= NVIF_MEM_UNCACHED;
 108                 mmu->type[i].heap = args.heap;
 109         }
 110
 111         if (mmu->kind_nr) {
 112                 struct nvif_mmu_kind_v0 *kind;
 113                 u32 argc = sizeof(*kind) + sizeof(*kind->data) * mmu->kind_nr;
 114
 115                 if (ret = -ENOMEM, !(kind = kmalloc(argc, GFP_KERNEL)))
 116                         goto done;
 117                 kind->version = 0;
 118                 kind->count = mmu->kind_nr;
 119
 120                 ret = nvif_object_mthd(&mmu->object, NVIF_MMU_V0_KIND,
 121                                        kind, argc);
 122                 if (ret == 0)
 123                         memcpy(mmu->kind, kind->data, kind->count);
 124                 kfree(kind);
 125         }
 126
 127 done:
 128         if (ret)
 129                 nvif_mmu_fini(mmu);
 130         return ret;
 131 }