kernel/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 #include <core/device.h>
  27
  28 extern const u8 gf100_pte_storage_type_map[256];
  29
  30 bool
  31 gf100_fb_memtype_valid(struct nvkm_fb *pfb, u32 tile_flags)
  32 {
  33         u8 memtype = (tile_flags & 0x0000ff00) >> 8;
  34         return likely((gf100_pte_storage_type_map[memtype] != 0xff));
  35 }
  36
  37 static void
  38 gf100_fb_intr(struct nvkm_subdev *subdev)
  39 {
  40         struct gf100_fb_priv *priv = (void *)subdev;
  41         u32 intr = nv_rd32(priv, 0x000100);
  42         if (intr & 0x08000000) {
  43                 nv_debug(priv, "PFFB intr\n");
  44                 intr &= ~0x08000000;
  45         }
  46         if (intr & 0x00002000) {
  47                 nv_debug(priv, "PBFB intr\n");
  48                 intr &= ~0x00002000;
  49         }
  50 }
  51
  52 int
  53 gf100_fb_init(struct nvkm_object *object)
  54 {
  55         struct gf100_fb_priv *priv = (void *)object;
  56         int ret;
  57
  58         ret = nvkm_fb_init(&priv->base);
  59         if (ret)
  60                 return ret;
  61
  62         if (priv->r100c10_page)
  63                 nv_wr32(priv, 0x100c10, priv->r100c10 >> 8);
  64
  65         nv_mask(priv, 0x100c80, 0x00000001, 0x00000000); /* 128KiB lpg */
  66         return 0;
  67 }
  68
  69 void
  70 gf100_fb_dtor(struct nvkm_object *object)
  71 {
  72         struct nvkm_device *device = nv_device(object);
  73         struct gf100_fb_priv *priv = (void *)object;
  74
  75         if (priv->r100c10_page) {
  76                 dma_unmap_page(nv_device_base(device), priv->r100c10, PAGE_SIZE,
  77                                DMA_BIDIRECTIONAL);
  78                 __free_page(priv->r100c10_page);
  79         }
  80
  81         nvkm_fb_destroy(&priv->base);
  82 }
  83
  84 int
  85 gf100_fb_ctor(struct nvkm_object *parent, struct nvkm_object *engine,
  86               struct nvkm_oclass *oclass, void *data, u32 size,
  87               struct nvkm_object **pobject)
  88 {
  89         struct nvkm_device *device = nv_device(parent);
  90         struct gf100_fb_priv *priv;
  91         int ret;
  92
  93         ret = nvkm_fb_create(parent, engine, oclass, &priv);
  94         *pobject = nv_object(priv);
  95         if (ret)
  96                 return ret;
  97
  98         priv->r100c10_page = alloc_page(GFP_KERNEL | __GFP_ZERO);
  99         if (priv->r100c10_page) {
 100                 priv->r100c10 = dma_map_page(nv_device_base(device),
 101                                              priv->r100c10_page, 0, PAGE_SIZE,
 102                                              DMA_BIDIRECTIONAL);
 103                 if (dma_mapping_error(nv_device_base(device), priv->r100c10))
 104                         return -EFAULT;
 105         }
 106
 107         nv_subdev(priv)->intr = gf100_fb_intr;
 108         return 0;
 109 }
 110
 111 struct nvkm_oclass *
 112 gf100_fb_oclass = &(struct nvkm_fb_impl) {
 113         .base.handle = NV_SUBDEV(FB, 0xc0),
 114         .base.ofuncs = &(struct nvkm_ofuncs) {
 115                 .ctor = gf100_fb_ctor,
 116                 .dtor = gf100_fb_dtor,
 117                 .init = gf100_fb_init,
 118                 .fini = _nvkm_fb_fini,
 119         },
 120         .memtype = gf100_fb_memtype_valid,
 121         .ram = &gf100_ram_oclass,
 122 }.base;