LXR linux/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
  28extern const u8 gf100_pte_storage_type_map[256];
  29
  30bool
  31gf100_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
  37static void
  38gf100_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
  52int
  53gf100_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
  69void
  70gf100_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
  84int
  85gf100_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
 111struct nvkm_oclass *
 112gf100_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;
 123