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_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
  40void
  41nvif_mem_fini(struct nvif_mem *mem)
  42{
  43        nvif_object_fini(&mem->object);
  44}
  45
  46int
  47nvif_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
  85int
  86nvif_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}
 102