drivers/gpu/drm/nouveau/nv84_bsp.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 <drm/drmP.h>
  26 #include "nouveau_drv.h"
  27 #include "nouveau_util.h"
  28 #include "nouveau_vm.h"
  29 #include "nouveau_ramht.h"
  30
  31 /*XXX: This stub is currently used on NV98+ also, as soon as this becomes
  32  *     more than just an enable/disable stub this needs to be split out to
  33  *     nv98_bsp.c...
  34  */
  35
  36 struct nv84_bsp_engine {
  37         struct nouveau_exec_engine base;
  38 };
  39
  40 static int
  41 nv84_bsp_fini(struct drm_device *dev, int engine, bool suspend)
  42 {
  43         if (!(nv_rd32(dev, 0x000200) & 0x00008000))
  44                 return 0;
  45
  46         nv_mask(dev, 0x000200, 0x00008000, 0x00000000);
  47         return 0;
  48 }
  49
  50 static int
  51 nv84_bsp_init(struct drm_device *dev, int engine)
  52 {
  53         nv_mask(dev, 0x000200, 0x00008000, 0x00000000);
  54         nv_mask(dev, 0x000200, 0x00008000, 0x00008000);
  55         return 0;
  56 }
  57
  58 static void
  59 nv84_bsp_destroy(struct drm_device *dev, int engine)
  60 {
  61         struct nv84_bsp_engine *pbsp = nv_engine(dev, engine);
  62
  63         NVOBJ_ENGINE_DEL(dev, BSP);
  64
  65         kfree(pbsp);
  66 }
  67
  68 int
  69 nv84_bsp_create(struct drm_device *dev)
  70 {
  71         struct nv84_bsp_engine *pbsp;
  72
  73         pbsp = kzalloc(sizeof(*pbsp), GFP_KERNEL);
  74         if (!pbsp)
  75                 return -ENOMEM;
  76
  77         pbsp->base.destroy = nv84_bsp_destroy;
  78         pbsp->base.init = nv84_bsp_init;
  79         pbsp->base.fini = nv84_bsp_fini;
  80
  81         NVOBJ_ENGINE_ADD(dev, BSP, &pbsp->base);
  82         return 0;
  83 }