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// SPDX-License-Identifier: GPL-2.0
/* Copyright (C) 2012-2018 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"
struct cc_debugfs_ctx {
struct dentry *dir;
};
#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 debug_regs[] = {
CC_DEBUG_REG(HOST_SIGNATURE),
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(HOST_VERSION),
CC_DEBUG_REG(GPR_HOST),
CC_DEBUG_REG(AXIM_MON_COMP),
};
int __init cc_debugfs_global_init(void)
{
cc_debugfs_dir = debugfs_create_dir("ccree", NULL);
return !cc_debugfs_dir;
}
void __exit 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 cc_debugfs_ctx *ctx;
struct debugfs_regset32 *regset;
struct dentry *file;
ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
if (!ctx)
return -ENOMEM;
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;
ctx->dir = debugfs_create_dir(drvdata->plat_dev->name, cc_debugfs_dir);
if (!ctx->dir)
return -ENFILE;
file = debugfs_create_regset32("regs", 0400, ctx->dir, regset);
if (!file) {
debugfs_remove(ctx->dir);
return -ENFILE;
}
file = debugfs_create_bool("coherent", 0400, ctx->dir,
&drvdata->coherent);
if (!file) {
debugfs_remove_recursive(ctx->dir);
return -ENFILE;
}
drvdata->debugfs = ctx;
return 0;
}
void cc_debugfs_fini(struct cc_drvdata *drvdata)
{
struct cc_debugfs_ctx *ctx = (struct cc_debugfs_ctx *)drvdata->debugfs;
debugfs_remove_recursive(ctx->dir);
}
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