linux-stable/drivers/crypto/ccree/cc_debugfs.c
Greg Kroah-Hartman 54eedf0b1d crypto: ccree - no need to check return value of debugfs_create functions
When calling debugfs functions, there is no need to ever check the
return value.  The function can work or not, but the code logic should
never do something different based on this.

Cc: Yael Chemla <yael.chemla@foss.arm.com>
Cc: Gilad Ben-Yossef <gilad@benyossef.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: linux-crypto@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-By: Gilad Ben-Yossef <gilad@benyossef.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2019-02-01 14:42:03 +08:00

88 lines
2 KiB
C

// 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[] = {
{ .name = "SIGNATURE" }, /* Must be 0th */
{ .name = "VERSION" }, /* Must be 1st */
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 __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;
debug_regs[0].offset = drvdata->sig_offset;
debug_regs[1].offset = drvdata->ver_offset;
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);
debugfs_create_regset32("regs", 0400, ctx->dir, regset);
debugfs_create_bool("coherent", 0400, ctx->dir, &drvdata->coherent);
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);
}