/*
 * Copyright 2019 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.
 */
#include "priv.h"
#include <core/falcon.h>
#include <core/firmware.h>
#include <nvfw/fw.h>
#include <nvfw/ls.h>

void
nvkm_acr_lsfw_del(struct nvkm_acr_lsfw *lsfw)
{
        nvkm_blob_dtor(&lsfw->img);
        nvkm_firmware_put(lsfw->sig);
        list_del(&lsfw->head);
        kfree(lsfw);
}

void
nvkm_acr_lsfw_del_all(struct nvkm_acr *acr)
{
        struct nvkm_acr_lsfw *lsfw, *lsft;
        list_for_each_entry_safe(lsfw, lsft, &acr->lsfw, head) {
                nvkm_acr_lsfw_del(lsfw);
        }
}

static struct nvkm_acr_lsfw *
nvkm_acr_lsfw_get(struct nvkm_acr *acr, enum nvkm_acr_lsf_id id)
{
        struct nvkm_acr_lsfw *lsfw;
        list_for_each_entry(lsfw, &acr->lsfw, head) {
                if (lsfw->id == id)
                        return lsfw;
        }
        return NULL;
}

struct nvkm_acr_lsfw *
nvkm_acr_lsfw_add(const struct nvkm_acr_lsf_func *func, struct nvkm_acr *acr,
                 struct nvkm_falcon *falcon, enum nvkm_acr_lsf_id id)
{
        struct nvkm_acr_lsfw *lsfw;

        if (!acr || list_empty(&acr->hsfw))
                return ERR_PTR(-ENOSYS);

        lsfw = nvkm_acr_lsfw_get(acr, id);
        if (lsfw && lsfw->func) {
                nvkm_error(&acr->subdev, "LSFW %d redefined\n", id);
                return ERR_PTR(-EEXIST);
        }

        if (!lsfw) {
                if (!(lsfw = kzalloc(sizeof(*lsfw), GFP_KERNEL)))
                        return ERR_PTR(-ENOMEM);

                lsfw->id = id;
                list_add_tail(&lsfw->head, &acr->lsfw);
        }

        lsfw->func = func;
        lsfw->falcon = falcon;
        return lsfw;
}

static struct nvkm_acr_lsfw *
nvkm_acr_lsfw_load_sig_image_desc_(struct nvkm_subdev *subdev,
                                   struct nvkm_falcon *falcon,
                                   enum nvkm_acr_lsf_id id,
                                   const char *path, int ver,
                                   const struct nvkm_acr_lsf_func *func,
                                   const struct firmware **pdesc)
{
        struct nvkm_acr *acr = subdev->device->acr;
        struct nvkm_acr_lsfw *lsfw;
        int ret;

        if (IS_ERR((lsfw = nvkm_acr_lsfw_add(func, acr, falcon, id))))
                return lsfw;

        ret = nvkm_firmware_load_name(subdev, path, "sig", ver, &lsfw->sig);
        if (ret)
                goto done;

        ret = nvkm_firmware_load_blob(subdev, path, "image", ver, &lsfw->img);
        if (ret)
                goto done;

        ret = nvkm_firmware_load_name(subdev, path, "desc", ver, pdesc);
done:
        if (ret) {
                nvkm_acr_lsfw_del(lsfw);
                return ERR_PTR(ret);
        }

        return lsfw;
}

static void
nvkm_acr_lsfw_from_desc(const struct nvfw_ls_desc_head *desc,
                        struct nvkm_acr_lsfw *lsfw)
{
        lsfw->bootloader_size = ALIGN(desc->bootloader_size, 256);
        lsfw->bootloader_imem_offset = desc->bootloader_imem_offset;

        lsfw->app_size = ALIGN(desc->app_size, 256);
        lsfw->app_start_offset = desc->app_start_offset;
        lsfw->app_imem_entry = desc->app_imem_entry;
        lsfw->app_resident_code_offset = desc->app_resident_code_offset;
        lsfw->app_resident_code_size = desc->app_resident_code_size;
        lsfw->app_resident_data_offset = desc->app_resident_data_offset;
        lsfw->app_resident_data_size = desc->app_resident_data_size;

        lsfw->ucode_size = ALIGN(lsfw->app_resident_data_offset, 256) +
                           lsfw->bootloader_size;
        lsfw->data_size = lsfw->app_size + lsfw->bootloader_size -
                          lsfw->ucode_size;
}

int
nvkm_acr_lsfw_load_sig_image_desc(struct nvkm_subdev *subdev,
                                  struct nvkm_falcon *falcon,
                                  enum nvkm_acr_lsf_id id,
                                  const char *path, int ver,
                                  const struct nvkm_acr_lsf_func *func)
{
        const struct firmware *fw;
        struct nvkm_acr_lsfw *lsfw;

        lsfw = nvkm_acr_lsfw_load_sig_image_desc_(subdev, falcon, id, path, ver,
                                                  func, &fw);
        if (IS_ERR(lsfw))
                return PTR_ERR(lsfw);

        nvkm_acr_lsfw_from_desc(&nvfw_ls_desc(subdev, fw->data)->head, lsfw);
        nvkm_firmware_put(fw);
        return 0;
}

int
nvkm_acr_lsfw_load_sig_image_desc_v1(struct nvkm_subdev *subdev,
                                     struct nvkm_falcon *falcon,
                                     enum nvkm_acr_lsf_id id,
                                     const char *path, int ver,
                                     const struct nvkm_acr_lsf_func *func)
{
        const struct firmware *fw;
        struct nvkm_acr_lsfw *lsfw;

        lsfw = nvkm_acr_lsfw_load_sig_image_desc_(subdev, falcon, id, path, ver,
                                                  func, &fw);
        if (IS_ERR(lsfw))
                return PTR_ERR(lsfw);

        nvkm_acr_lsfw_from_desc(&nvfw_ls_desc_v1(subdev, fw->data)->head, lsfw);
        nvkm_firmware_put(fw);
        return 0;
}

int
nvkm_acr_lsfw_load_bl_inst_data_sig(struct nvkm_subdev *subdev,
                                    struct nvkm_falcon *falcon,
                                    enum nvkm_acr_lsf_id id,
                                    const char *path, int ver,
                                    const struct nvkm_acr_lsf_func *func)
{
        struct nvkm_acr *acr = subdev->device->acr;
        struct nvkm_acr_lsfw *lsfw;
        const struct firmware *bl = NULL, *inst = NULL, *data = NULL;
        const struct nvfw_bin_hdr *hdr;
        const struct nvfw_bl_desc *desc;
        u32 *bldata;
        int ret;

        if (IS_ERR((lsfw = nvkm_acr_lsfw_add(func, acr, falcon, id))))
                return PTR_ERR(lsfw);

        ret = nvkm_firmware_load_name(subdev, path, "bl", ver, &bl);
        if (ret)
                goto done;

        hdr = nvfw_bin_hdr(subdev, bl->data);
        desc = nvfw_bl_desc(subdev, bl->data + hdr->header_offset);
        bldata = (void *)(bl->data + hdr->data_offset);

        ret = nvkm_firmware_load_name(subdev, path, "inst", ver, &inst);
        if (ret)
                goto done;

        ret = nvkm_firmware_load_name(subdev, path, "data", ver, &data);
        if (ret)
                goto done;

        ret = nvkm_firmware_load_name(subdev, path, "sig", ver, &lsfw->sig);
        if (ret)
                goto done;

        lsfw->bootloader_size = ALIGN(desc->code_size, 256);
        lsfw->bootloader_imem_offset = desc->start_tag << 8;

        lsfw->app_start_offset = lsfw->bootloader_size;
        lsfw->app_imem_entry = 0;
        lsfw->app_resident_code_offset = 0;
        lsfw->app_resident_code_size = ALIGN(inst->size, 256);
        lsfw->app_resident_data_offset = lsfw->app_resident_code_size;
        lsfw->app_resident_data_size = ALIGN(data->size, 256);
        lsfw->app_size = lsfw->app_resident_code_size +
                         lsfw->app_resident_data_size;

        lsfw->img.size = lsfw->bootloader_size + lsfw->app_size;
        if (!(lsfw->img.data = kzalloc(lsfw->img.size, GFP_KERNEL))) {
                ret = -ENOMEM;
                goto done;
        }

        memcpy(lsfw->img.data, bldata, lsfw->bootloader_size);
        memcpy(lsfw->img.data + lsfw->app_start_offset +
               lsfw->app_resident_code_offset, inst->data, inst->size);
        memcpy(lsfw->img.data + lsfw->app_start_offset +
               lsfw->app_resident_data_offset, data->data, data->size);

        lsfw->ucode_size = ALIGN(lsfw->app_resident_data_offset, 256) +
                           lsfw->bootloader_size;
        lsfw->data_size = lsfw->app_size + lsfw->bootloader_size -
                          lsfw->ucode_size;

done:
        if (ret)
                nvkm_acr_lsfw_del(lsfw);
        nvkm_firmware_put(data);
        nvkm_firmware_put(inst);
        nvkm_firmware_put(bl);
        return ret;
}