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         struct nvif_mmu_v0 args;
  40         int ret, i;
  41
  42         args.version = 0;
  43         mmu->heap = NULL;
  44         mmu->type = NULL;
  45         mmu->kind = NULL;
  46
  47         ret = nvif_object_init(parent, 0, oclass, &args, sizeof(args),
  48                                &mmu->object);
  49         if (ret)
  50                 goto done;
  51
  52         mmu->dmabits = args.dmabits;
  53         mmu->heap_nr = args.heap_nr;
  54         mmu->type_nr = args.type_nr;
  55         mmu->kind_nr = args.kind_nr;
  56
  57         mmu->heap = kmalloc(sizeof(*mmu->heap) * mmu->heap_nr, GFP_KERNEL);
  58         mmu->type = kmalloc(sizeof(*mmu->type) * mmu->type_nr, GFP_KERNEL);
  59         if (ret = -ENOMEM, !mmu->heap || !mmu->type)
  60                 goto done;
  61
  62         mmu->kind = kmalloc(sizeof(*mmu->kind) * mmu->kind_nr, GFP_KERNEL);
  63         if (!mmu->kind && mmu->kind_nr)
  64                 goto done;
  65
  66         for (i = 0; i < mmu->heap_nr; i++) {
  67                 struct nvif_mmu_heap_v0 args = { .index = i };
  68
  69                 ret = nvif_object_mthd(&mmu->object, NVIF_MMU_V0_HEAP,
  70                                        &args, sizeof(args));
  71                 if (ret)
  72                         goto done;
  73
  74                 mmu->heap[i].size = args.size;
  75         }
  76
  77         for (i = 0; i < mmu->type_nr; i++) {
  78                 struct nvif_mmu_type_v0 args = { .index = i };
  79
  80                 ret = nvif_object_mthd(&mmu->object, NVIF_MMU_V0_TYPE,
  81                                        &args, sizeof(args));
  82                 if (ret)
  83                         goto done;
  84
  85                 mmu->type[i].type = 0;
  86                 if (args.vram) mmu->type[i].type |= NVIF_MEM_VRAM;
  87                 if (args.host) mmu->type[i].type |= NVIF_MEM_HOST;
  88                 if (args.comp) mmu->type[i].type |= NVIF_MEM_COMP;
  89                 if (args.disp) mmu->type[i].type |= NVIF_MEM_DISP;
  90                 if (args.kind    ) mmu->type[i].type |= NVIF_MEM_KIND;
  91                 if (args.mappable) mmu->type[i].type |= NVIF_MEM_MAPPABLE;
  92                 if (args.coherent) mmu->type[i].type |= NVIF_MEM_COHERENT;
  93                 if (args.uncached) mmu->type[i].type |= NVIF_MEM_UNCACHED;
  94                 mmu->type[i].heap = args.heap;
  95         }
  96
  97         if (mmu->kind_nr) {
  98                 struct nvif_mmu_kind_v0 *kind;
  99                 u32 argc = sizeof(*kind) + sizeof(*kind->data) * mmu->kind_nr;
 100
 101                 if (ret = -ENOMEM, !(kind = kmalloc(argc, GFP_KERNEL)))
 102                         goto done;
 103                 kind->version = 0;
 104                 kind->count = mmu->kind_nr;
 105
 106                 ret = nvif_object_mthd(&mmu->object, NVIF_MMU_V0_KIND,
 107                                        kind, argc);
 108                 if (ret == 0)
 109                         memcpy(mmu->kind, kind->data, kind->count);
 110                 kfree(kind);
 111         }
 112
 113 done:
 114         if (ret)
 115                 nvif_mmu_fini(mmu);
 116         return ret;
 117 }