drivers/gpu/drm/nouveau/nvkm/subdev/fb/nvc0.c

   1 /*
   2  * Copyright 2012 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 "nvc0.h"
  26
  27 extern const u8 nvc0_pte_storage_type_map[256];
  28
  29 bool
  30 nvc0_fb_memtype_valid(struct nouveau_fb *pfb, u32 tile_flags)
  31 {
  32         u8 memtype = (tile_flags & 0x0000ff00) >> 8;
  33         return likely((nvc0_pte_storage_type_map[memtype] != 0xff));
  34 }
  35
  36 static void
  37 nvc0_fb_intr(struct nouveau_subdev *subdev)
  38 {
  39         struct nvc0_fb_priv *priv = (void *)subdev;
  40         u32 intr = nv_rd32(priv, 0x000100);
  41         if (intr & 0x08000000) {
  42                 nv_debug(priv, "PFFB intr\n");
  43                 intr &= ~0x08000000;
  44         }
  45         if (intr & 0x00002000) {
  46                 nv_debug(priv, "PBFB intr\n");
  47                 intr &= ~0x00002000;
  48         }
  49 }
  50
  51 int
  52 nvc0_fb_init(struct nouveau_object *object)
  53 {
  54         struct nvc0_fb_priv *priv = (void *)object;
  55         int ret;
  56
  57         ret = nouveau_fb_init(&priv->base);
  58         if (ret)
  59                 return ret;
  60
  61         if (priv->r100c10_page)
  62                 nv_wr32(priv, 0x100c10, priv->r100c10 >> 8);
  63         nv_mask(priv, 0x100c80, 0x00000001, 0x00000000); /* 128KiB lpg */
  64         return 0;
  65 }
  66
  67 void
  68 nvc0_fb_dtor(struct nouveau_object *object)
  69 {
  70         struct nouveau_device *device = nv_device(object);
  71         struct nvc0_fb_priv *priv = (void *)object;
  72
  73         if (priv->r100c10_page) {
  74                 dma_unmap_page(nv_device_base(device), priv->r100c10, PAGE_SIZE,
  75                                DMA_BIDIRECTIONAL);
  76                 __free_page(priv->r100c10_page);
  77         }
  78
  79         nouveau_fb_destroy(&priv->base);
  80 }
  81
  82 int
  83 nvc0_fb_ctor(struct nouveau_object *parent, struct nouveau_object *engine,
  84              struct nouveau_oclass *oclass, void *data, u32 size,
  85              struct nouveau_object **pobject)
  86 {
  87         struct nouveau_device *device = nv_device(parent);
  88         struct nvc0_fb_priv *priv;
  89         int ret;
  90
  91         ret = nouveau_fb_create(parent, engine, oclass, &priv);
  92         *pobject = nv_object(priv);
  93         if (ret)
  94                 return ret;
  95
  96         priv->r100c10_page = alloc_page(GFP_KERNEL | __GFP_ZERO);
  97         if (priv->r100c10_page) {
  98                 priv->r100c10 = dma_map_page(nv_device_base(device),
  99                                              priv->r100c10_page, 0, PAGE_SIZE,
 100                                              DMA_BIDIRECTIONAL);
 101                 if (dma_mapping_error(nv_device_base(device), priv->r100c10))
 102                         return -EFAULT;
 103         }
 104
 105         nv_subdev(priv)->intr = nvc0_fb_intr;
 106         return 0;
 107 }
 108
 109 struct nouveau_oclass *
 110 nvc0_fb_oclass = &(struct nouveau_fb_impl) {
 111         .base.handle = NV_SUBDEV(FB, 0xc0),
 112         .base.ofuncs = &(struct nouveau_ofuncs) {
 113                 .ctor = nvc0_fb_ctor,
 114                 .dtor = nvc0_fb_dtor,
 115                 .init = nvc0_fb_init,
 116                 .fini = _nouveau_fb_fini,
 117         },
 118         .memtype = nvc0_fb_memtype_valid,
 119         .ram = &nvc0_ram_oclass,
 120 }.base;