LXR linux/drivers/gpu/drm/nouveau/nvkm/subdev/fb/ram.c

   1/*
   2 * Copyright 2015 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 * Authors: Ben Skeggs <bskeggs@redhat.com>
  23 */
  24#include "ram.h"
  25
  26int
  27nvkm_ram_init(struct nvkm_ram *ram)
  28{
  29        if (ram->func->init)
  30                return ram->func->init(ram);
  31        return 0;
  32}
  33
  34void
  35nvkm_ram_del(struct nvkm_ram **pram)
  36{
  37        struct nvkm_ram *ram = *pram;
  38        if (ram && !WARN_ON(!ram->func)) {
  39                if (ram->func->dtor)
  40                        *pram = ram->func->dtor(ram);
  41                nvkm_mm_fini(&ram->tags);
  42                nvkm_mm_fini(&ram->vram);
  43                kfree(*pram);
  44                *pram = NULL;
  45        }
  46}
  47
  48int
  49nvkm_ram_ctor(const struct nvkm_ram_func *func, struct nvkm_fb *fb,
  50              enum nvkm_ram_type type, u64 size, u32 tags,
  51              struct nvkm_ram *ram)
  52{
  53        static const char *name[] = {
  54                [NVKM_RAM_TYPE_UNKNOWN] = "of unknown memory type",
  55                [NVKM_RAM_TYPE_STOLEN ] = "stolen system memory",
  56                [NVKM_RAM_TYPE_SGRAM  ] = "SGRAM",
  57                [NVKM_RAM_TYPE_SDRAM  ] = "SDRAM",
  58                [NVKM_RAM_TYPE_DDR1   ] = "DDR1",
  59                [NVKM_RAM_TYPE_DDR2   ] = "DDR2",
  60                [NVKM_RAM_TYPE_DDR3   ] = "DDR3",
  61                [NVKM_RAM_TYPE_GDDR2  ] = "GDDR2",
  62                [NVKM_RAM_TYPE_GDDR3  ] = "GDDR3",
  63                [NVKM_RAM_TYPE_GDDR4  ] = "GDDR4",
  64                [NVKM_RAM_TYPE_GDDR5  ] = "GDDR5",
  65        };
  66        struct nvkm_subdev *subdev = &fb->subdev;
  67        int ret;
  68
  69        nvkm_info(subdev, "%d MiB %s\n", (int)(size >> 20), name[type]);
  70        ram->func = func;
  71        ram->fb = fb;
  72        ram->type = type;
  73        ram->size = size;
  74
  75        if (!nvkm_mm_initialised(&ram->vram)) {
  76                ret = nvkm_mm_init(&ram->vram, 0, size >> NVKM_RAM_MM_SHIFT, 1);
  77                if (ret)
  78                        return ret;
  79        }
  80
  81        if (!nvkm_mm_initialised(&ram->tags)) {
  82                ret = nvkm_mm_init(&ram->tags, 0, tags ? ++tags : 0, 1);
  83                if (ret)
  84                        return ret;
  85
  86                nvkm_debug(subdev, "%d compression tags\n", tags);
  87        }
  88
  89        return 0;
  90}
  91
  92int
  93nvkm_ram_new_(const struct nvkm_ram_func *func, struct nvkm_fb *fb,
  94              enum nvkm_ram_type type, u64 size, u32 tags,
  95              struct nvkm_ram **pram)
  96{
  97        if (!(*pram = kzalloc(sizeof(**pram), GFP_KERNEL)))
  98                return -ENOMEM;
  99        return nvkm_ram_ctor(func, fb, type, size, tags, *pram);
 100}
 101