/*
 * 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 "gf100.h"
#include "ram.h"

#include <core/memory.h>
#include <core/option.h>
#include <subdev/therm.h>

void
gf100_fb_intr(struct nvkm_fb *base)
{
        struct gf100_fb *fb = gf100_fb(base);
        struct nvkm_subdev *subdev = &fb->base.subdev;
        struct nvkm_device *device = subdev->device;
        u32 intr = nvkm_rd32(device, 0x000100);
        if (intr & 0x08000000)
                nvkm_debug(subdev, "PFFB intr\n");
        if (intr & 0x00002000)
                nvkm_debug(subdev, "PBFB intr\n");
}

int
gf100_fb_oneinit(struct nvkm_fb *base)
{
        struct gf100_fb *fb = gf100_fb(base);
        struct nvkm_device *device = fb->base.subdev.device;
        int ret, size = 1 << (fb->base.page ? fb->base.page : 17);

        size = nvkm_longopt(device->cfgopt, "MmuDebugBufferSize", size);
        size = max(size, 0x1000);

        ret = nvkm_memory_new(device, NVKM_MEM_TARGET_INST, size, 0x1000,
                              true, &fb->base.mmu_rd);
        if (ret)
                return ret;

        ret = nvkm_memory_new(device, NVKM_MEM_TARGET_INST, size, 0x1000,
                              true, &fb->base.mmu_wr);
        if (ret)
                return ret;

        return 0;
}

int
gf100_fb_init_page(struct nvkm_fb *fb)
{
        struct nvkm_device *device = fb->subdev.device;
        switch (fb->page) {
        case 16: nvkm_mask(device, 0x100c80, 0x00000001, 0x00000001); break;
        case 17: nvkm_mask(device, 0x100c80, 0x00000001, 0x00000000); break;
        default:
                return -EINVAL;
        }
        return 0;
}

void
gf100_fb_sysmem_flush_page_init(struct nvkm_fb *fb)
{
        // Ensure that the address can actually fit in the register
        WARN_ON(fb->sysmem.flush_page_addr > DMA_BIT_MASK(40));

        nvkm_wr32(fb->subdev.device, 0x100c10, fb->sysmem.flush_page_addr >> 8);
}

void
gf100_fb_init(struct nvkm_fb *base)
{
        struct gf100_fb *fb = gf100_fb(base);
        struct nvkm_device *device = fb->base.subdev.device;

        if (base->func->clkgate_pack) {
                nvkm_therm_clkgate_init(device->therm,
                                        base->func->clkgate_pack);
        }
}

void *
gf100_fb_dtor(struct nvkm_fb *base)
{
        struct gf100_fb *fb = gf100_fb(base);

        return fb;
}

int
gf100_fb_new_(const struct nvkm_fb_func *func, struct nvkm_device *device,
              enum nvkm_subdev_type type, int inst, struct nvkm_fb **pfb)
{
        struct gf100_fb *fb;

        if (!(fb = kzalloc_obj(*fb)))
                return -ENOMEM;
        nvkm_fb_ctor(func, device, type, inst, &fb->base);
        *pfb = &fb->base;

        return 0;
}

static const struct nvkm_fb_func
gf100_fb = {
        .dtor = gf100_fb_dtor,
        .oneinit = gf100_fb_oneinit,
        .init = gf100_fb_init,
        .init_page = gf100_fb_init_page,
        .intr = gf100_fb_intr,
        .sysmem.flush_page_init = gf100_fb_sysmem_flush_page_init,
        .ram_new = gf100_ram_new,
        .default_bigpage = 17,
};

int
gf100_fb_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst, struct nvkm_fb **pfb)
{
        return gf100_fb_new_(&gf100_fb, device, type, inst, pfb);
}