nv04.c

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/*
 * Copyright 2012 Red Hat Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 *
 * Authors: Ben Skeggs
 */

#include <subdev/fb.h>

#define NV04_PFB_BOOT_0                     0x00100000
#   define NV04_PFB_BOOT_0_RAM_AMOUNT           0x00000003
#   define NV04_PFB_BOOT_0_RAM_AMOUNT_32MB          0x00000000
#   define NV04_PFB_BOOT_0_RAM_AMOUNT_4MB           0x00000001
#   define NV04_PFB_BOOT_0_RAM_AMOUNT_8MB           0x00000002
#   define NV04_PFB_BOOT_0_RAM_AMOUNT_16MB          0x00000003
#   define NV04_PFB_BOOT_0_RAM_WIDTH_128            0x00000004
#   define NV04_PFB_BOOT_0_RAM_TYPE             0x00000028
#   define NV04_PFB_BOOT_0_RAM_TYPE_SGRAM_8MBIT     0x00000000
#   define NV04_PFB_BOOT_0_RAM_TYPE_SGRAM_16MBIT        0x00000008
#   define NV04_PFB_BOOT_0_RAM_TYPE_SGRAM_16MBIT_4BANK  0x00000010
#   define NV04_PFB_BOOT_0_RAM_TYPE_SDRAM_16MBIT        0x00000018
#   define NV04_PFB_BOOT_0_RAM_TYPE_SDRAM_64MBIT        0x00000020
#   define NV04_PFB_BOOT_0_RAM_TYPE_SDRAM_64MBITX16     0x00000028
#   define NV04_PFB_BOOT_0_UMA_ENABLE           0x00000100
#   define NV04_PFB_BOOT_0_UMA_SIZE             0x0000f000
#define NV04_PFB_CFG0                       0x00100200

struct nv04_fb_priv {
    struct nouveau_fb base;
};

bool
nv04_fb_memtype_valid(struct nouveau_fb *pfb, u32 tile_flags)
{
    if (!(tile_flags & 0xff00))
        return true;

    return false;
}

static int
nv04_fb_init(struct nouveau_object *object)
{
    struct nv04_fb_priv *priv = (void *)object;
    int ret;

    ret = nouveau_fb_init(&priv->base);
    if (ret)
        return ret;

    /* This is what the DDX did for NV_ARCH_04, but a mmio-trace shows
     * nvidia reading PFB_CFG_0, then writing back its original value.
     * (which was 0x701114 in this case)
     */
    nv_wr32(priv, NV04_PFB_CFG0, 0x1114);
    return 0;
}

static int
nv04_fb_ctor(struct nouveau_object *parent, struct nouveau_object *engine,
         struct nouveau_oclass *oclass, void *data, u32 size,
         struct nouveau_object **pobject)
{
    struct nv04_fb_priv *priv;
    u32 boot0;
    int ret;

    ret = nouveau_fb_create(parent, engine, oclass, &priv);
    *pobject = nv_object(priv);
    if (ret)
        return ret;

    boot0 = nv_rd32(priv, NV04_PFB_BOOT_0);
    if (boot0 & 0x00000100) {
        priv->base.ram.size  = ((boot0 >> 12) & 0xf) * 2 + 2;
        priv->base.ram.size *= 1024 * 1024;
    } else {
        switch (boot0 & NV04_PFB_BOOT_0_RAM_AMOUNT) {
        case NV04_PFB_BOOT_0_RAM_AMOUNT_32MB:
            priv->base.ram.size = 32 * 1024 * 1024;
            break;
        case NV04_PFB_BOOT_0_RAM_AMOUNT_16MB:
            priv->base.ram.size = 16 * 1024 * 1024;
            break;
        case NV04_PFB_BOOT_0_RAM_AMOUNT_8MB:
            priv->base.ram.size = 8 * 1024 * 1024;
            break;
        case NV04_PFB_BOOT_0_RAM_AMOUNT_4MB:
            priv->base.ram.size = 4 * 1024 * 1024;
            break;
        }
    }

    if ((boot0 & 0x00000038) <= 0x10)
        priv->base.ram.type = NV_MEM_TYPE_SGRAM;
    else
        priv->base.ram.type = NV_MEM_TYPE_SDRAM;


    priv->base.memtype_valid = nv04_fb_memtype_valid;
    return nouveau_fb_created(&priv->base);
}

struct nouveau_oclass
nv04_fb_oclass = {
    .handle = NV_SUBDEV(FB, 0x04),
    .ofuncs = &(struct nouveau_ofuncs) {
        .ctor = nv04_fb_ctor,
        .dtor = _nouveau_fb_dtor,
        .init = nv04_fb_init,
        .fini = _nouveau_fb_fini,
    },
};