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_ctor_map(struct nvif_mmu *mmu, const char *name, u8 type, u64 size,
  29                   struct nvif_mem *mem)
  30 {
  31         int ret = nvif_mem_ctor(mmu, name, mmu->mem, NVIF_MEM_MAPPABLE | type,
  32                                 0, size, NULL, 0, mem);
  33         if (ret == 0) {
  34                 ret = nvif_object_map(&mem->object, NULL, 0);
  35                 if (ret)
  36                         nvif_mem_dtor(mem);
  37         }
  38         return ret;
  39 }
  40
  41 void
  42 nvif_mem_dtor(struct nvif_mem *mem)
  43 {
  44         nvif_object_dtor(&mem->object);
  45 }
  46
  47 int
  48 nvif_mem_ctor_type(struct nvif_mmu *mmu, const char *name, s32 oclass,
  49                    int type, u8 page, u64 size, void *argv, u32 argc,
  50                    struct nvif_mem *mem)
  51 {
  52         struct nvif_mem_v0 *args;
  53         u8 stack[128];
  54         int ret;
  55
  56         mem->object.client = NULL;
  57         if (type < 0)
  58                 return -EINVAL;
  59
  60         if (sizeof(*args) + argc > sizeof(stack)) {
  61                 if (!(args = kmalloc(sizeof(*args) + argc, GFP_KERNEL)))
  62                         return -ENOMEM;
  63         } else {
  64                 args = (void *)stack;
  65         }
  66         args->version = 0;
  67         args->type = type;
  68         args->page = page;
  69         args->size = size;
  70         memcpy(args->data, argv, argc);
  71
  72         ret = nvif_object_ctor(&mmu->object, name ? name : "nvifMem", 0, oclass,
  73                                args, sizeof(*args) + argc, &mem->object);
  74         if (ret == 0) {
  75                 mem->type = mmu->type[type].type;
  76                 mem->page = args->page;
  77                 mem->addr = args->addr;
  78                 mem->size = args->size;
  79         }
  80
  81         if (args != (void *)stack)
  82                 kfree(args);
  83         return ret;
  84
  85 }
  86
  87 int
  88 nvif_mem_ctor(struct nvif_mmu *mmu, const char *name, s32 oclass, u8 type,
  89               u8 page, u64 size, void *argv, u32 argc, struct nvif_mem *mem)
  90 {
  91         int ret = -EINVAL, i;
  92
  93         mem->object.client = NULL;
  94
  95         for (i = 0; ret && i < mmu->type_nr; i++) {
  96                 if ((mmu->type[i].type & type) == type) {
  97                         ret = nvif_mem_ctor_type(mmu, name, oclass, i, page,
  98                                                  size, argv, argc, mem);
  99                 }
 100         }
 101
 102         return ret;
 103 }