/*
 * Copyright 2013 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
 */
#define gf100_ram(p) container_of((p), struct gf100_ram, base)
#include "ram.h"
#include "ramfuc.h"

#include <core/option.h>
#include <subdev/bios.h>
#include <subdev/bios/pll.h>
#include <subdev/bios/rammap.h>
#include <subdev/bios/timing.h>
#include <subdev/clk.h>
#include <subdev/clk/pll.h>
#include <subdev/ltc.h>

struct gf100_ramfuc {
        struct ramfuc base;

        struct ramfuc_reg r_0x10fe20;
        struct ramfuc_reg r_0x10fe24;
        struct ramfuc_reg r_0x137320;
        struct ramfuc_reg r_0x137330;

        struct ramfuc_reg r_0x132000;
        struct ramfuc_reg r_0x132004;
        struct ramfuc_reg r_0x132100;

        struct ramfuc_reg r_0x137390;

        struct ramfuc_reg r_0x10f290;
        struct ramfuc_reg r_0x10f294;
        struct ramfuc_reg r_0x10f298;
        struct ramfuc_reg r_0x10f29c;
        struct ramfuc_reg r_0x10f2a0;

        struct ramfuc_reg r_0x10f300;
        struct ramfuc_reg r_0x10f338;
        struct ramfuc_reg r_0x10f340;
        struct ramfuc_reg r_0x10f344;
        struct ramfuc_reg r_0x10f348;

        struct ramfuc_reg r_0x10f910;
        struct ramfuc_reg r_0x10f914;

        struct ramfuc_reg r_0x100b0c;
        struct ramfuc_reg r_0x10f050;
        struct ramfuc_reg r_0x10f090;
        struct ramfuc_reg r_0x10f200;
        struct ramfuc_reg r_0x10f210;
        struct ramfuc_reg r_0x10f310;
        struct ramfuc_reg r_0x10f314;
        struct ramfuc_reg r_0x10f610;
        struct ramfuc_reg r_0x10f614;
        struct ramfuc_reg r_0x10f800;
        struct ramfuc_reg r_0x10f808;
        struct ramfuc_reg r_0x10f824;
        struct ramfuc_reg r_0x10f830;
        struct ramfuc_reg r_0x10f988;
        struct ramfuc_reg r_0x10f98c;
        struct ramfuc_reg r_0x10f990;
        struct ramfuc_reg r_0x10f998;
        struct ramfuc_reg r_0x10f9b0;
        struct ramfuc_reg r_0x10f9b4;
        struct ramfuc_reg r_0x10fb04;
        struct ramfuc_reg r_0x10fb08;
        struct ramfuc_reg r_0x137300;
        struct ramfuc_reg r_0x137310;
        struct ramfuc_reg r_0x137360;
        struct ramfuc_reg r_0x1373ec;
        struct ramfuc_reg r_0x1373f0;
        struct ramfuc_reg r_0x1373f8;

        struct ramfuc_reg r_0x61c140;
        struct ramfuc_reg r_0x611200;

        struct ramfuc_reg r_0x13d8f4;
};

struct gf100_ram {
        struct nvkm_ram base;
        struct gf100_ramfuc fuc;
        struct nvbios_pll refpll;
        struct nvbios_pll mempll;
};

static void
gf100_ram_train(struct gf100_ramfuc *fuc, u32 magic)
{
        struct gf100_ram *ram = container_of(fuc, typeof(*ram), fuc);
        struct nvkm_fb *fb = ram->base.fb;
        struct nvkm_device *device = fb->subdev.device;
        u32 part = nvkm_rd32(device, 0x022438), i;
        u32 mask = nvkm_rd32(device, 0x022554);
        u32 addr = 0x110974;

        ram_wr32(fuc, 0x10f910, magic);
        ram_wr32(fuc, 0x10f914, magic);

        for (i = 0; (magic & 0x80000000) && i < part; addr += 0x1000, i++) {
                if (mask & (1 << i))
                        continue;
                ram_wait(fuc, addr, 0x0000000f, 0x00000000, 500000);
        }
}

int
gf100_ram_calc(struct nvkm_ram *base, u32 freq)
{
        struct gf100_ram *ram = gf100_ram(base);
        struct gf100_ramfuc *fuc = &ram->fuc;
        struct nvkm_subdev *subdev = &ram->base.fb->subdev;
        struct nvkm_device *device = subdev->device;
        struct nvkm_clk *clk = device->clk;
        struct nvkm_bios *bios = device->bios;
        struct nvbios_ramcfg cfg;
        u8  ver, cnt, len, strap;
        struct {
                u32 data;
                u8  size;
        } rammap, ramcfg, timing;
        int ref, div, out;
        int from, mode;
        int N1, M1, P;
        int ret;

        /* lookup memory config data relevant to the target frequency */
        rammap.data = nvbios_rammapEm(bios, freq / 1000, &ver, &rammap.size,
                                      &cnt, &ramcfg.size, &cfg);
        if (!rammap.data || ver != 0x10 || rammap.size < 0x0e) {
                nvkm_error(subdev, "invalid/missing rammap entry\n");
                return -EINVAL;
        }

        /* locate specific data set for the attached memory */
        strap = nvbios_ramcfg_index(subdev);
        if (strap >= cnt) {
                nvkm_error(subdev, "invalid ramcfg strap\n");
                return -EINVAL;
        }

        ramcfg.data = rammap.data + rammap.size + (strap * ramcfg.size);
        if (!ramcfg.data || ver != 0x10 || ramcfg.size < 0x0e) {
                nvkm_error(subdev, "invalid/missing ramcfg entry\n");
                return -EINVAL;
        }

        /* lookup memory timings, if bios says they're present */
        strap = nvbios_rd08(bios, ramcfg.data + 0x01);
        if (strap != 0xff) {
                timing.data = nvbios_timingEe(bios, strap, &ver, &timing.size,
                                              &cnt, &len);
                if (!timing.data || ver != 0x10 || timing.size < 0x19) {
                        nvkm_error(subdev, "invalid/missing timing entry\n");
                        return -EINVAL;
                }
        } else {
                timing.data = 0;
        }

        ret = ram_init(fuc, ram->base.fb);
        if (ret)
                return ret;

        /* determine current mclk configuration */
        from = !!(ram_rd32(fuc, 0x1373f0) & 0x00000002); /*XXX: ok? */

        /* determine target mclk configuration */
        if (!(ram_rd32(fuc, 0x137300) & 0x00000100))
                ref = nvkm_clk_read(clk, nv_clk_src_sppll0);
        else
                ref = nvkm_clk_read(clk, nv_clk_src_sppll1);
        div = max(min((ref * 2) / freq, (u32)65), (u32)2) - 2;
        out = (ref * 2) / (div + 2);
        mode = freq != out;

        ram_mask(fuc, 0x137360, 0x00000002, 0x00000000);

        if ((ram_rd32(fuc, 0x132000) & 0x00000002) || 0 /*XXX*/) {
                ram_nuke(fuc, 0x132000);
                ram_mask(fuc, 0x132000, 0x00000002, 0x00000002);
                ram_mask(fuc, 0x132000, 0x00000002, 0x00000000);
        }

        if (mode == 1) {
                ram_nuke(fuc, 0x10fe20);
                ram_mask(fuc, 0x10fe20, 0x00000002, 0x00000002);
                ram_mask(fuc, 0x10fe20, 0x00000002, 0x00000000);
        }

// 0x00020034 // 0x0000000a
        ram_wr32(fuc, 0x132100, 0x00000001);

        if (mode == 1 && from == 0) {
                /* calculate refpll */
                ret = gt215_pll_calc(subdev, &ram->refpll, ram->mempll.refclk,
                                     &N1, NULL, &M1, &P);
                if (ret <= 0) {
                        nvkm_error(subdev, "unable to calc refpll\n");
                        return ret ? ret : -ERANGE;
                }

                ram_wr32(fuc, 0x10fe20, 0x20010000);
                ram_wr32(fuc, 0x137320, 0x00000003);
                ram_wr32(fuc, 0x137330, 0x81200006);
                ram_wr32(fuc, 0x10fe24, (P << 16) | (N1 << 8) | M1);
                ram_wr32(fuc, 0x10fe20, 0x20010001);
                ram_wait(fuc, 0x137390, 0x00020000, 0x00020000, 64000);

                /* calculate mempll */
                ret = gt215_pll_calc(subdev, &ram->mempll, freq,
                                     &N1, NULL, &M1, &P);
                if (ret <= 0) {
                        nvkm_error(subdev, "unable to calc refpll\n");
                        return ret ? ret : -ERANGE;
                }

                ram_wr32(fuc, 0x10fe20, 0x20010005);
                ram_wr32(fuc, 0x132004, (P << 16) | (N1 << 8) | M1);
                ram_wr32(fuc, 0x132000, 0x18010101);
                ram_wait(fuc, 0x137390, 0x00000002, 0x00000002, 64000);
        } else
        if (mode == 0) {
                ram_wr32(fuc, 0x137300, 0x00000003);
        }

        if (from == 0) {
                ram_nuke(fuc, 0x10fb04);
                ram_mask(fuc, 0x10fb04, 0x0000ffff, 0x00000000);
                ram_nuke(fuc, 0x10fb08);
                ram_mask(fuc, 0x10fb08, 0x0000ffff, 0x00000000);
                ram_wr32(fuc, 0x10f988, 0x2004ff00);
                ram_wr32(fuc, 0x10f98c, 0x003fc040);
                ram_wr32(fuc, 0x10f990, 0x20012001);
                ram_wr32(fuc, 0x10f998, 0x00011a00);
                ram_wr32(fuc, 0x13d8f4, 0x00000000);
        } else {
                ram_wr32(fuc, 0x10f988, 0x20010000);
                ram_wr32(fuc, 0x10f98c, 0x00000000);
                ram_wr32(fuc, 0x10f990, 0x20012001);
                ram_wr32(fuc, 0x10f998, 0x00010a00);
        }

        if (from == 0) {
// 0x00020039 // 0x000000ba
        }

// 0x0002003a // 0x00000002
        ram_wr32(fuc, 0x100b0c, 0x00080012);
// 0x00030014 // 0x00000000 // 0x02b5f070
// 0x00030014 // 0x00010000 // 0x02b5f070
        ram_wr32(fuc, 0x611200, 0x00003300);
// 0x00020034 // 0x0000000a
// 0x00030020 // 0x00000001 // 0x00000000

        ram_mask(fuc, 0x10f200, 0x00000800, 0x00000000);
        ram_wr32(fuc, 0x10f210, 0x00000000);
        ram_nsec(fuc, 1000);
        if (mode == 0)
                gf100_ram_train(fuc, 0x000c1001);
        ram_wr32(fuc, 0x10f310, 0x00000001);
        ram_nsec(fuc, 1000);
        ram_wr32(fuc, 0x10f090, 0x00000061);
        ram_wr32(fuc, 0x10f090, 0xc000007f);
        ram_nsec(fuc, 1000);

        if (from == 0) {
                ram_wr32(fuc, 0x10f824, 0x00007fd4);
        } else {
                ram_wr32(fuc, 0x1373ec, 0x00020404);
        }

        if (mode == 0) {
                ram_mask(fuc, 0x10f808, 0x00080000, 0x00000000);
                ram_mask(fuc, 0x10f200, 0x00008000, 0x00008000);
                ram_wr32(fuc, 0x10f830, 0x41500010);
                ram_mask(fuc, 0x10f830, 0x01000000, 0x00000000);
                ram_mask(fuc, 0x132100, 0x00000100, 0x00000100);
                ram_wr32(fuc, 0x10f050, 0xff000090);
                ram_wr32(fuc, 0x1373ec, 0x00020f0f);
                ram_wr32(fuc, 0x1373f0, 0x00000003);
                ram_wr32(fuc, 0x137310, 0x81201616);
                ram_wr32(fuc, 0x132100, 0x00000001);
// 0x00020039 // 0x000000ba
                ram_wr32(fuc, 0x10f830, 0x00300017);
                ram_wr32(fuc, 0x1373f0, 0x00000001);
                ram_wr32(fuc, 0x10f824, 0x00007e77);
                ram_wr32(fuc, 0x132000, 0x18030001);
                ram_wr32(fuc, 0x10f090, 0x4000007e);
                ram_nsec(fuc, 2000);
                ram_wr32(fuc, 0x10f314, 0x00000001);
                ram_wr32(fuc, 0x10f210, 0x80000000);
                ram_wr32(fuc, 0x10f338, 0x00300220);
                ram_wr32(fuc, 0x10f300, 0x0000011d);
                ram_nsec(fuc, 1000);
                ram_wr32(fuc, 0x10f290, 0x02060505);
                ram_wr32(fuc, 0x10f294, 0x34208288);
                ram_wr32(fuc, 0x10f298, 0x44050411);
                ram_wr32(fuc, 0x10f29c, 0x0000114c);
                ram_wr32(fuc, 0x10f2a0, 0x42e10069);
                ram_wr32(fuc, 0x10f614, 0x40044f77);
                ram_wr32(fuc, 0x10f610, 0x40044f77);
                ram_wr32(fuc, 0x10f344, 0x00600009);
                ram_nsec(fuc, 1000);
                ram_wr32(fuc, 0x10f348, 0x00700008);
                ram_wr32(fuc, 0x61c140, 0x19240000);
                ram_wr32(fuc, 0x10f830, 0x00300017);
                gf100_ram_train(fuc, 0x80021001);
                gf100_ram_train(fuc, 0x80081001);
                ram_wr32(fuc, 0x10f340, 0x00500004);
                ram_nsec(fuc, 1000);
                ram_wr32(fuc, 0x10f830, 0x01300017);
                ram_wr32(fuc, 0x10f830, 0x00300017);
// 0x00030020 // 0x00000000 // 0x00000000
// 0x00020034 // 0x0000000b
                ram_wr32(fuc, 0x100b0c, 0x00080028);
                ram_wr32(fuc, 0x611200, 0x00003330);
        } else {
                ram_wr32(fuc, 0x10f800, 0x00001800);
                ram_wr32(fuc, 0x13d8f4, 0x00000000);
                ram_wr32(fuc, 0x1373ec, 0x00020404);
                ram_wr32(fuc, 0x1373f0, 0x00000003);
                ram_wr32(fuc, 0x10f830, 0x40700010);
                ram_wr32(fuc, 0x10f830, 0x40500010);
                ram_wr32(fuc, 0x13d8f4, 0x00000000);
                ram_wr32(fuc, 0x1373f8, 0x00000000);
                ram_wr32(fuc, 0x132100, 0x00000101);
                ram_wr32(fuc, 0x137310, 0x89201616);
                ram_wr32(fuc, 0x10f050, 0xff000090);
                ram_wr32(fuc, 0x1373ec, 0x00030404);
                ram_wr32(fuc, 0x1373f0, 0x00000002);
        // 0x00020039 // 0x00000011
                ram_wr32(fuc, 0x132100, 0x00000001);
                ram_wr32(fuc, 0x1373f8, 0x00002000);
                ram_nsec(fuc, 2000);
                ram_wr32(fuc, 0x10f808, 0x7aaa0050);
                ram_wr32(fuc, 0x10f830, 0x00500010);
                ram_wr32(fuc, 0x10f200, 0x00ce1000);
                ram_wr32(fuc, 0x10f090, 0x4000007e);
                ram_nsec(fuc, 2000);
                ram_wr32(fuc, 0x10f314, 0x00000001);
                ram_wr32(fuc, 0x10f210, 0x80000000);
                ram_wr32(fuc, 0x10f338, 0x00300200);
                ram_wr32(fuc, 0x10f300, 0x0000084d);
                ram_nsec(fuc, 1000);
                ram_wr32(fuc, 0x10f290, 0x0b343825);
                ram_wr32(fuc, 0x10f294, 0x3483028e);
                ram_wr32(fuc, 0x10f298, 0x440c0600);
                ram_wr32(fuc, 0x10f29c, 0x0000214c);
                ram_wr32(fuc, 0x10f2a0, 0x42e20069);
                ram_wr32(fuc, 0x10f200, 0x00ce0000);
                ram_wr32(fuc, 0x10f614, 0x60044e77);
                ram_wr32(fuc, 0x10f610, 0x60044e77);
                ram_wr32(fuc, 0x10f340, 0x00500000);
                ram_nsec(fuc, 1000);
                ram_wr32(fuc, 0x10f344, 0x00600228);
                ram_nsec(fuc, 1000);
                ram_wr32(fuc, 0x10f348, 0x00700000);
                ram_wr32(fuc, 0x13d8f4, 0x00000000);
                ram_wr32(fuc, 0x61c140, 0x09a40000);

                gf100_ram_train(fuc, 0x800e1008);

                ram_nsec(fuc, 1000);
                ram_wr32(fuc, 0x10f800, 0x00001804);
        // 0x00030020 // 0x00000000 // 0x00000000
        // 0x00020034 // 0x0000000b
                ram_wr32(fuc, 0x13d8f4, 0x00000000);
                ram_wr32(fuc, 0x100b0c, 0x00080028);
                ram_wr32(fuc, 0x611200, 0x00003330);
                ram_nsec(fuc, 100000);
                ram_wr32(fuc, 0x10f9b0, 0x05313f41);
                ram_wr32(fuc, 0x10f9b4, 0x00002f50);

                gf100_ram_train(fuc, 0x010c1001);
        }

        ram_mask(fuc, 0x10f200, 0x00000800, 0x00000800);
// 0x00020016 // 0x00000000

        if (mode == 0)
                ram_mask(fuc, 0x132000, 0x00000001, 0x00000000);

        return 0;
}

int
gf100_ram_prog(struct nvkm_ram *base)
{
        struct gf100_ram *ram = gf100_ram(base);
        struct nvkm_device *device = ram->base.fb->subdev.device;
        ram_exec(&ram->fuc, nvkm_boolopt(device->cfgopt, "NvMemExec", true));
        return 0;
}

void
gf100_ram_tidy(struct nvkm_ram *base)
{
        struct gf100_ram *ram = gf100_ram(base);
        ram_exec(&ram->fuc, false);
}

void
gf100_ram_put(struct nvkm_ram *ram, struct nvkm_mem **pmem)
{
        struct nvkm_ltc *ltc = ram->fb->subdev.device->ltc;
        struct nvkm_mem *mem = *pmem;

        *pmem = NULL;
        if (unlikely(mem == NULL))
                return;

        mutex_lock(&ram->fb->subdev.mutex);
        if (mem->tag)
                nvkm_ltc_tags_free(ltc, &mem->tag);
        __nv50_ram_put(ram, mem);
        mutex_unlock(&ram->fb->subdev.mutex);

        kfree(mem);
}

int
gf100_ram_get(struct nvkm_ram *ram, u64 size, u32 align, u32 ncmin,
              u32 memtype, struct nvkm_mem **pmem)
{
        struct nvkm_ltc *ltc = ram->fb->subdev.device->ltc;
        struct nvkm_mm *mm = &ram->vram;
        struct nvkm_mm_node *r;
        struct nvkm_mem *mem;
        int type = (memtype & 0x0ff);
        int back = (memtype & 0x800);
        const bool comp = gf100_pte_storage_type_map[type] != type;
        int ret;

        size  >>= NVKM_RAM_MM_SHIFT;
        align >>= NVKM_RAM_MM_SHIFT;
        ncmin >>= NVKM_RAM_MM_SHIFT;
        if (!ncmin)
                ncmin = size;

        mem = kzalloc(sizeof(*mem), GFP_KERNEL);
        if (!mem)
                return -ENOMEM;

        INIT_LIST_HEAD(&mem->regions);
        mem->size = size;

        mutex_lock(&ram->fb->subdev.mutex);
        if (comp) {
                /* compression only works with lpages */
                if (align == (1 << (17 - NVKM_RAM_MM_SHIFT))) {
                        int n = size >> 5;
                        nvkm_ltc_tags_alloc(ltc, n, &mem->tag);
                }

                if (unlikely(!mem->tag))
                        type = gf100_pte_storage_type_map[type];
        }
        mem->memtype = type;

        do {
                if (back)
                        ret = nvkm_mm_tail(mm, 0, 1, size, ncmin, align, &r);
                else
                        ret = nvkm_mm_head(mm, 0, 1, size, ncmin, align, &r);
                if (ret) {
                        mutex_unlock(&ram->fb->subdev.mutex);
                        ram->func->put(ram, &mem);
                        return ret;
                }

                list_add_tail(&r->rl_entry, &mem->regions);
                size -= r->length;
        } while (size);
        mutex_unlock(&ram->fb->subdev.mutex);

        r = list_first_entry(&mem->regions, struct nvkm_mm_node, rl_entry);
        mem->offset = (u64)r->offset << NVKM_RAM_MM_SHIFT;
        *pmem = mem;
        return 0;
}

int
gf100_ram_init(struct nvkm_ram *base)
{
        static const u8  train0[] = {
                0x00, 0xff, 0x55, 0xaa, 0x33, 0xcc,
                0x00, 0xff, 0xff, 0x00, 0xff, 0x00,
        };
        static const u32 train1[] = {
                0x00000000, 0xffffffff,
                0x55555555, 0xaaaaaaaa,
                0x33333333, 0xcccccccc,
                0xf0f0f0f0, 0x0f0f0f0f,
                0x00ff00ff, 0xff00ff00,
                0x0000ffff, 0xffff0000,
        };
        struct gf100_ram *ram = gf100_ram(base);
        struct nvkm_device *device = ram->base.fb->subdev.device;
        int i;

        switch (ram->base.type) {
        case NVKM_RAM_TYPE_GDDR5:
                break;
        default:
                return 0;
        }

        /* prepare for ddr link training, and load training patterns */
        for (i = 0; i < 0x30; i++) {
                nvkm_wr32(device, 0x10f968, 0x00000000 | (i << 8));
                nvkm_wr32(device, 0x10f96c, 0x00000000 | (i << 8));
                nvkm_wr32(device, 0x10f920, 0x00000100 | train0[i % 12]);
                nvkm_wr32(device, 0x10f924, 0x00000100 | train0[i % 12]);
                nvkm_wr32(device, 0x10f918,              train1[i % 12]);
                nvkm_wr32(device, 0x10f91c,              train1[i % 12]);
                nvkm_wr32(device, 0x10f920, 0x00000000 | train0[i % 12]);
                nvkm_wr32(device, 0x10f924, 0x00000000 | train0[i % 12]);
                nvkm_wr32(device, 0x10f918,              train1[i % 12]);
                nvkm_wr32(device, 0x10f91c,              train1[i % 12]);
        }

        return 0;
}

u32
gf100_ram_probe_fbpa_amount(struct nvkm_device *device, int fbpa)
{
        return nvkm_rd32(device, 0x11020c + (fbpa * 0x1000));
}

u32
gf100_ram_probe_fbp_amount(const struct nvkm_ram_func *func, u32 fbpao,
                           struct nvkm_device *device, int fbp, int *pltcs)
{
        if (!(fbpao & BIT(fbp))) {
                *pltcs = 1;
                return func->probe_fbpa_amount(device, fbp);
        }
        return 0;
}

u32
gf100_ram_probe_fbp(const struct nvkm_ram_func *func,
                    struct nvkm_device *device, int fbp, int *pltcs)
{
        u32 fbpao = nvkm_rd32(device, 0x022554);
        return func->probe_fbp_amount(func, fbpao, device, fbp, pltcs);
}

int
gf100_ram_ctor(const struct nvkm_ram_func *func, struct nvkm_fb *fb,
               struct nvkm_ram *ram)
{
        struct nvkm_subdev *subdev = &fb->subdev;
        struct nvkm_device *device = subdev->device;
        struct nvkm_bios *bios = device->bios;
        const u32 rsvd_head = ( 256 * 1024); /* vga memory */
        const u32 rsvd_tail = (1024 * 1024); /* vbios etc */
        enum nvkm_ram_type type = nvkm_fb_bios_memtype(bios);
        u32 fbps = nvkm_rd32(device, 0x022438);
        u64 total = 0, lcomm = ~0, lower, ubase, usize;
        int ret, fbp, ltcs, ltcn = 0;

        nvkm_debug(subdev, "%d FBP(s)\n", fbps);
        for (fbp = 0; fbp < fbps; fbp++) {
                u32 size = func->probe_fbp(func, device, fbp, &ltcs);
                if (size) {
                        nvkm_debug(subdev, "FBP %d: %4d MiB, %d LTC(s)\n",
                                   fbp, size, ltcs);
                        lcomm  = min(lcomm, (u64)(size / ltcs) << 20);
                        total += (u64) size << 20;
                        ltcn  += ltcs;
                } else {
                        nvkm_debug(subdev, "FBP %d: disabled\n", fbp);
                }
        }

        lower = lcomm * ltcn;
        ubase = lcomm + func->upper;
        usize = total - lower;

        nvkm_debug(subdev, "Lower: %4lld MiB @ %010llx\n", lower >> 20, 0ULL);
        nvkm_debug(subdev, "Upper: %4lld MiB @ %010llx\n", usize >> 20, ubase);
        nvkm_debug(subdev, "Total: %4lld MiB\n", total >> 20);

        ret = nvkm_ram_ctor(func, fb, type, total, 0, ram);
        if (ret)
                return ret;

        nvkm_mm_fini(&ram->vram);

        /* Some GPUs are in what's known as a "mixed memory" configuration.
         *
         * This is either where some FBPs have more memory than the others,
         * or where LTCs have been disabled on a FBP.
         */
        if (lower != total) {
                /* The common memory amount is addressed normally. */
                ret = nvkm_mm_init(&ram->vram, rsvd_head >> NVKM_RAM_MM_SHIFT,
                                   (lower - rsvd_head) >> NVKM_RAM_MM_SHIFT, 1);
                if (ret)
                        return ret;

                /* And the rest is much higher in the physical address
                 * space, and may not be usable for certain operations.
                 */
                ret = nvkm_mm_init(&ram->vram, ubase >> NVKM_RAM_MM_SHIFT,
                                   (usize - rsvd_tail) >> NVKM_RAM_MM_SHIFT, 1);
                if (ret)
                        return ret;
        } else {
                /* GPUs without mixed-memory are a lot nicer... */
                ret = nvkm_mm_init(&ram->vram, rsvd_head >> NVKM_RAM_MM_SHIFT,
                                   (total - rsvd_head - rsvd_tail) >>
                                   NVKM_RAM_MM_SHIFT, 1);
                if (ret)
                        return ret;
        }

        return 0;
}

int
gf100_ram_new_(const struct nvkm_ram_func *func,
               struct nvkm_fb *fb, struct nvkm_ram **pram)
{
        struct nvkm_subdev *subdev = &fb->subdev;
        struct nvkm_bios *bios = subdev->device->bios;
        struct gf100_ram *ram;
        int ret;

        if (!(ram = kzalloc(sizeof(*ram), GFP_KERNEL)))
                return -ENOMEM;
        *pram = &ram->base;

        ret = gf100_ram_ctor(func, fb, &ram->base);
        if (ret)
                return ret;

        ret = nvbios_pll_parse(bios, 0x0c, &ram->refpll);
        if (ret) {
                nvkm_error(subdev, "mclk refpll data not found\n");
                return ret;
        }

        ret = nvbios_pll_parse(bios, 0x04, &ram->mempll);
        if (ret) {
                nvkm_error(subdev, "mclk pll data not found\n");
                return ret;
        }

        ram->fuc.r_0x10fe20 = ramfuc_reg(0x10fe20);
        ram->fuc.r_0x10fe24 = ramfuc_reg(0x10fe24);
        ram->fuc.r_0x137320 = ramfuc_reg(0x137320);
        ram->fuc.r_0x137330 = ramfuc_reg(0x137330);

        ram->fuc.r_0x132000 = ramfuc_reg(0x132000);
        ram->fuc.r_0x132004 = ramfuc_reg(0x132004);
        ram->fuc.r_0x132100 = ramfuc_reg(0x132100);

        ram->fuc.r_0x137390 = ramfuc_reg(0x137390);

        ram->fuc.r_0x10f290 = ramfuc_reg(0x10f290);
        ram->fuc.r_0x10f294 = ramfuc_reg(0x10f294);
        ram->fuc.r_0x10f298 = ramfuc_reg(0x10f298);
        ram->fuc.r_0x10f29c = ramfuc_reg(0x10f29c);
        ram->fuc.r_0x10f2a0 = ramfuc_reg(0x10f2a0);

        ram->fuc.r_0x10f300 = ramfuc_reg(0x10f300);
        ram->fuc.r_0x10f338 = ramfuc_reg(0x10f338);
        ram->fuc.r_0x10f340 = ramfuc_reg(0x10f340);
        ram->fuc.r_0x10f344 = ramfuc_reg(0x10f344);
        ram->fuc.r_0x10f348 = ramfuc_reg(0x10f348);

        ram->fuc.r_0x10f910 = ramfuc_reg(0x10f910);
        ram->fuc.r_0x10f914 = ramfuc_reg(0x10f914);

        ram->fuc.r_0x100b0c = ramfuc_reg(0x100b0c);
        ram->fuc.r_0x10f050 = ramfuc_reg(0x10f050);
        ram->fuc.r_0x10f090 = ramfuc_reg(0x10f090);
        ram->fuc.r_0x10f200 = ramfuc_reg(0x10f200);
        ram->fuc.r_0x10f210 = ramfuc_reg(0x10f210);
        ram->fuc.r_0x10f310 = ramfuc_reg(0x10f310);
        ram->fuc.r_0x10f314 = ramfuc_reg(0x10f314);
        ram->fuc.r_0x10f610 = ramfuc_reg(0x10f610);
        ram->fuc.r_0x10f614 = ramfuc_reg(0x10f614);
        ram->fuc.r_0x10f800 = ramfuc_reg(0x10f800);
        ram->fuc.r_0x10f808 = ramfuc_reg(0x10f808);
        ram->fuc.r_0x10f824 = ramfuc_reg(0x10f824);
        ram->fuc.r_0x10f830 = ramfuc_reg(0x10f830);
        ram->fuc.r_0x10f988 = ramfuc_reg(0x10f988);
        ram->fuc.r_0x10f98c = ramfuc_reg(0x10f98c);
        ram->fuc.r_0x10f990 = ramfuc_reg(0x10f990);
        ram->fuc.r_0x10f998 = ramfuc_reg(0x10f998);
        ram->fuc.r_0x10f9b0 = ramfuc_reg(0x10f9b0);
        ram->fuc.r_0x10f9b4 = ramfuc_reg(0x10f9b4);
        ram->fuc.r_0x10fb04 = ramfuc_reg(0x10fb04);
        ram->fuc.r_0x10fb08 = ramfuc_reg(0x10fb08);
        ram->fuc.r_0x137310 = ramfuc_reg(0x137300);
        ram->fuc.r_0x137310 = ramfuc_reg(0x137310);
        ram->fuc.r_0x137360 = ramfuc_reg(0x137360);
        ram->fuc.r_0x1373ec = ramfuc_reg(0x1373ec);
        ram->fuc.r_0x1373f0 = ramfuc_reg(0x1373f0);
        ram->fuc.r_0x1373f8 = ramfuc_reg(0x1373f8);

        ram->fuc.r_0x61c140 = ramfuc_reg(0x61c140);
        ram->fuc.r_0x611200 = ramfuc_reg(0x611200);

        ram->fuc.r_0x13d8f4 = ramfuc_reg(0x13d8f4);
        return 0;
}

static const struct nvkm_ram_func
gf100_ram = {
        .upper = 0x0200000000,
        .probe_fbp = gf100_ram_probe_fbp,
        .probe_fbp_amount = gf100_ram_probe_fbp_amount,
        .probe_fbpa_amount = gf100_ram_probe_fbpa_amount,
        .init = gf100_ram_init,
        .get = gf100_ram_get,
        .put = gf100_ram_put,
        .calc = gf100_ram_calc,
        .prog = gf100_ram_prog,
        .tidy = gf100_ram_tidy,
};

int
gf100_ram_new(struct nvkm_fb *fb, struct nvkm_ram **pram)
{
        return gf100_ram_new_(&gf100_ram, fb, pram);
}