drivers/gpu/drm/nouveau/nv98_crypt.c

   1 /*
   2  * Copyright 2011 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
  23  */
  24
  25 #include "drmP.h"
  26 #include "nouveau_drv.h"
  27 #include "nouveau_util.h"
  28 #include "nouveau_vm.h"
  29 #include "nouveau_ramht.h"
  30
  31 struct nv98_crypt_engine {
  32         struct nouveau_exec_engine base;
  33 };
  34
  35 static int
  36 nv98_crypt_fini(struct drm_device *dev, int engine, bool suspend)
  37 {
  38         if (!(nv_rd32(dev, 0x000200) & 0x00004000))
  39                 return 0;
  40
  41         nv_mask(dev, 0x000200, 0x00004000, 0x00000000);
  42         return 0;
  43 }
  44
  45 static int
  46 nv98_crypt_init(struct drm_device *dev, int engine)
  47 {
  48         nv_mask(dev, 0x000200, 0x00004000, 0x00000000);
  49         nv_mask(dev, 0x000200, 0x00004000, 0x00004000);
  50         return 0;
  51 }
  52
  53 static void
  54 nv98_crypt_destroy(struct drm_device *dev, int engine)
  55 {
  56         struct nv98_crypt_engine *pcrypt = nv_engine(dev, engine);
  57
  58         NVOBJ_ENGINE_DEL(dev, CRYPT);
  59
  60         kfree(pcrypt);
  61 }
  62
  63 int
  64 nv98_crypt_create(struct drm_device *dev)
  65 {
  66         struct nv98_crypt_engine *pcrypt;
  67
  68         pcrypt = kzalloc(sizeof(*pcrypt), GFP_KERNEL);
  69         if (!pcrypt)
  70                 return -ENOMEM;
  71
  72         pcrypt->base.destroy = nv98_crypt_destroy;
  73         pcrypt->base.init = nv98_crypt_init;
  74         pcrypt->base.fini = nv98_crypt_fini;
  75
  76         NVOBJ_ENGINE_ADD(dev, CRYPT, &pcrypt->base);
  77         return 0;
  78 }