drivers/gpu/drm/nouveau/nvif/mem.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/mem.h>
  23 #include <nvif/client.h>
  24
  25 #include <nvif/if000a.h>
  26
  27 void
  28 nvif_mem_fini(struct nvif_mem *mem)
  29 {
  30         nvif_object_fini(&mem->object);
  31 }
  32
  33 int
  34 nvif_mem_init_type(struct nvif_mmu *mmu, s32 oclass, int type, u8 page,
  35                    u64 size, void *argv, u32 argc, struct nvif_mem *mem)
  36 {
  37         struct nvif_mem_v0 *args;
  38         u8 stack[128];
  39         int ret;
  40
  41         mem->object.client = NULL;
  42         if (type < 0)
  43                 return -EINVAL;
  44
  45         if (sizeof(*args) + argc > sizeof(stack)) {
  46                 if (!(args = kmalloc(sizeof(*args) + argc, GFP_KERNEL)))
  47                         return -ENOMEM;
  48         } else {
  49                 args = (void *)stack;
  50         }
  51         args->version = 0;
  52         args->type = type;
  53         args->page = page;
  54         args->size = size;
  55         memcpy(args->data, argv, argc);
  56
  57         ret = nvif_object_init(&mmu->object, 0, oclass, args,
  58                                sizeof(*args) + argc, &mem->object);
  59         if (ret == 0) {
  60                 mem->type = mmu->type[type].type;
  61                 mem->page = args->page;
  62                 mem->addr = args->addr;
  63                 mem->size = args->size;
  64         }
  65
  66         if (args != (void *)stack)
  67                 kfree(args);
  68         return ret;
  69
  70 }
  71
  72 int
  73 nvif_mem_init(struct nvif_mmu *mmu, s32 oclass, u8 type, u8 page,
  74               u64 size, void *argv, u32 argc, struct nvif_mem *mem)
  75 {
  76         int ret = -EINVAL, i;
  77
  78         mem->object.client = NULL;
  79
  80         for (i = 0; ret && i < mmu->type_nr; i++) {
  81                 if ((mmu->type[i].type & type) == type) {
  82                         ret = nvif_mem_init_type(mmu, oclass, i, page, size,
  83                                                  argv, argc, mem);
  84                 }
  85         }
  86
  87         return ret;
  88 }