kernel/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
  26 int
  27 nvkm_ram_init(struct nvkm_ram *ram)
  28 {
  29         if (ram->func->init)
  30                 return ram->func->init(ram);
  31         return 0;
  32 }
  33
  34 void
  35 nvkm_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
  48 int
  49 nvkm_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
  92 int
  93 nvkm_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 }