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 int
  28 nvif_mem_init_map(struct nvif_mmu *mmu, u8 type, u64 size, struct nvif_mem *mem)
  29 {
  30         int ret = nvif_mem_init(mmu, mmu->mem, NVIF_MEM_MAPPABLE | type, 0,
  31                                 size, NULL, 0, mem);
  32         if (ret == 0) {
  33                 ret = nvif_object_map(&mem->object, NULL, 0);
  34                 if (ret)
  35                         nvif_mem_fini(mem);
  36         }
  37         return ret;
  38 }
  39
  40 void
  41 nvif_mem_fini(struct nvif_mem *mem)
  42 {
  43         nvif_object_fini(&mem->object);
  44 }
  45
  46 int
  47 nvif_mem_init_type(struct nvif_mmu *mmu, s32 oclass, int type, u8 page,
  48                    u64 size, void *argv, u32 argc, struct nvif_mem *mem)
  49 {
  50         struct nvif_mem_v0 *args;
  51         u8 stack[128];
  52         int ret;
  53
  54         mem->object.client = NULL;
  55         if (type < 0)
  56                 return -EINVAL;
  57
  58         if (sizeof(*args) + argc > sizeof(stack)) {
  59                 if (!(args = kmalloc(sizeof(*args) + argc, GFP_KERNEL)))
  60                         return -ENOMEM;
  61         } else {
  62                 args = (void *)stack;
  63         }
  64         args->version = 0;
  65         args->type = type;
  66         args->page = page;
  67         args->size = size;
  68         memcpy(args->data, argv, argc);
  69
  70         ret = nvif_object_init(&mmu->object, 0, oclass, args,
  71                                sizeof(*args) + argc, &mem->object);
  72         if (ret == 0) {
  73                 mem->type = mmu->type[type].type;
  74                 mem->page = args->page;
  75                 mem->addr = args->addr;
  76                 mem->size = args->size;
  77         }
  78
  79         if (args != (void *)stack)
  80                 kfree(args);
  81         return ret;
  82
  83 }
  84
  85 int
  86 nvif_mem_init(struct nvif_mmu *mmu, s32 oclass, u8 type, u8 page,
  87               u64 size, void *argv, u32 argc, struct nvif_mem *mem)
  88 {
  89         int ret = -EINVAL, i;
  90
  91         mem->object.client = NULL;
  92
  93         for (i = 0; ret && i < mmu->type_nr; i++) {
  94                 if ((mmu->type[i].type & type) == type) {
  95                         ret = nvif_mem_init_type(mmu, oclass, i, page, size,
  96                                                  argv, argc, mem);
  97                 }
  98         }
  99
 100         return ret;
 101 }