drivers/gpu/drm/nouveau/nvkm/subdev/fb/gf100.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 #include "gf100.h"
  25
  26 extern const u8 gf100_pte_storage_type_map[256];
  27
  28 bool
  29 gf100_fb_memtype_valid(struct nvkm_fb *pfb, u32 tile_flags)
  30 {
  31         u8 memtype = (tile_flags & 0x0000ff00) >> 8;
  32         return likely((gf100_pte_storage_type_map[memtype] != 0xff));
  33 }
  34
  35 static void
  36 gf100_fb_intr(struct nvkm_subdev *subdev)
  37 {
  38         struct gf100_fb_priv *priv = (void *)subdev;
  39         u32 intr = nv_rd32(priv, 0x000100);
  40         if (intr & 0x08000000) {
  41                 nv_debug(priv, "PFFB intr\n");
  42                 intr &= ~0x08000000;
  43         }
  44         if (intr & 0x00002000) {
  45                 nv_debug(priv, "PBFB intr\n");
  46                 intr &= ~0x00002000;
  47         }
  48 }
  49
  50 int
  51 gf100_fb_init(struct nvkm_object *object)
  52 {
  53         struct gf100_fb_priv *priv = (void *)object;
  54         int ret;
  55
  56         ret = nvkm_fb_init(&priv->base);
  57         if (ret)
  58                 return ret;
  59
  60         if (priv->r100c10_page)
  61                 nv_wr32(priv, 0x100c10, priv->r100c10 >> 8);
  62
  63         nv_mask(priv, 0x100c80, 0x00000001, 0x00000000); /* 128KiB lpg */
  64         return 0;
  65 }
  66
  67 void
  68 gf100_fb_dtor(struct nvkm_object *object)
  69 {
  70         struct nvkm_device *device = nv_device(object);
  71         struct gf100_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         nvkm_fb_destroy(&priv->base);
  80 }
  81
  82 int
  83 gf100_fb_ctor(struct nvkm_object *parent, struct nvkm_object *engine,
  84               struct nvkm_oclass *oclass, void *data, u32 size,
  85               struct nvkm_object **pobject)
  86 {
  87         struct nvkm_device *device = nv_device(parent);
  88         struct gf100_fb_priv *priv;
  89         int ret;
  90
  91         ret = nvkm_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 = gf100_fb_intr;
 106         return 0;
 107 }
 108
 109 struct nvkm_oclass *
 110 gf100_fb_oclass = &(struct nvkm_fb_impl) {
 111         .base.handle = NV_SUBDEV(FB, 0xc0),
 112         .base.ofuncs = &(struct nvkm_ofuncs) {
 113                 .ctor = gf100_fb_ctor,
 114                 .dtor = gf100_fb_dtor,
 115                 .init = gf100_fb_init,
 116                 .fini = _nvkm_fb_fini,
 117         },
 118         .memtype = gf100_fb_memtype_valid,
 119         .ram = &gf100_ram_oclass,
 120 }.base;