// SPDX-License-Identifier: GPL-2.0
/* Copyright (C) 2012-2019 ARM Limited or its affiliates. */

#include <linux/kernel.h>
#include <linux/debugfs.h>
#include <linux/stringify.h>
#include "cc_driver.h"
#include "cc_crypto_ctx.h"
#include "cc_debugfs.h"

#define CC_DEBUG_REG(_X) {      \
        .name = __stringify(_X),\
        .offset = CC_REG(_X)    \
        }

/*
 * This is a global var for the dentry of the
 * debugfs ccree/ dir. It is not tied down to
 * a specific instance of ccree, hence it is
 * global.
 */
static struct dentry *cc_debugfs_dir;

static struct debugfs_reg32 ver_sig_regs[] = {
        { .name = "SIGNATURE" }, /* Must be 0th */
        { .name = "VERSION" }, /* Must be 1st */
};

static const struct debugfs_reg32 pid_cid_regs[] = {
        CC_DEBUG_REG(PERIPHERAL_ID_0),
        CC_DEBUG_REG(PERIPHERAL_ID_1),
        CC_DEBUG_REG(PERIPHERAL_ID_2),
        CC_DEBUG_REG(PERIPHERAL_ID_3),
        CC_DEBUG_REG(PERIPHERAL_ID_4),
        CC_DEBUG_REG(COMPONENT_ID_0),
        CC_DEBUG_REG(COMPONENT_ID_1),
        CC_DEBUG_REG(COMPONENT_ID_2),
        CC_DEBUG_REG(COMPONENT_ID_3),
};

static const struct debugfs_reg32 debug_regs[] = {
        CC_DEBUG_REG(HOST_IRR),
        CC_DEBUG_REG(HOST_POWER_DOWN_EN),
        CC_DEBUG_REG(AXIM_MON_ERR),
        CC_DEBUG_REG(DSCRPTR_QUEUE_CONTENT),
        CC_DEBUG_REG(HOST_IMR),
        CC_DEBUG_REG(AXIM_CFG),
        CC_DEBUG_REG(AXIM_CACHE_PARAMS),
        CC_DEBUG_REG(GPR_HOST),
        CC_DEBUG_REG(AXIM_MON_COMP),
};

void __init cc_debugfs_global_init(void)
{
        cc_debugfs_dir = debugfs_create_dir("ccree", NULL);
}

void cc_debugfs_global_fini(void)
{
        debugfs_remove(cc_debugfs_dir);
}

int cc_debugfs_init(struct cc_drvdata *drvdata)
{
        struct device *dev = drvdata_to_dev(drvdata);
        struct debugfs_regset32 *regset, *verset;

        regset = devm_kzalloc(dev, sizeof(*regset), GFP_KERNEL);
        if (!regset)
                return -ENOMEM;

        regset->regs = debug_regs;
        regset->nregs = ARRAY_SIZE(debug_regs);
        regset->base = drvdata->cc_base;
        regset->dev = dev;

        drvdata->dir = debugfs_create_dir(drvdata->plat_dev->name,
                                          cc_debugfs_dir);

        debugfs_create_regset32("regs", 0400, drvdata->dir, regset);
        debugfs_create_bool("coherent", 0400, drvdata->dir, &drvdata->coherent);

        verset = devm_kzalloc(dev, sizeof(*verset), GFP_KERNEL);
        /* Failing here is not important enough to fail the module load */
        if (!verset)
                return 0;

        if (drvdata->hw_rev <= CC_HW_REV_712) {
                ver_sig_regs[0].offset = drvdata->sig_offset;
                ver_sig_regs[1].offset = drvdata->ver_offset;
                verset->regs = ver_sig_regs;
                verset->nregs = ARRAY_SIZE(ver_sig_regs);
        } else {
                verset->regs = pid_cid_regs;
                verset->nregs = ARRAY_SIZE(pid_cid_regs);
        }
        verset->base = drvdata->cc_base;
        verset->dev = dev;

        debugfs_create_regset32("version", 0400, drvdata->dir, verset);
        return 0;
}

void cc_debugfs_fini(struct cc_drvdata *drvdata)
{
        debugfs_remove_recursive(drvdata->dir);
}