LXR linux/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
  27int
  28nvif_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
  41void
  42nvif_mem_dtor(struct nvif_mem *mem)
  43{
  44        nvif_object_dtor(&mem->object);
  45}
  46
  47int
  48nvif_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
  87int
  88nvif_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}
 104