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staging: ccree: staging: ccree: replace sysfs by debugfs interface 

The ccree driver has had a none standard sysfs interface for debugging.
Replace it with a proper debugfs interface.

Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Gilad Ben-Yossef 2017-12-14 14:02:41 +00:00 committed by Greg Kroah-Hartman
parent 31aeaca4d2
commit b3ec9a6736
12 changed files with 154 additions and 224 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/staging/ccree/Makefile
View File

@ -1,3 +1,4 @@
obj-$(CONFIG_CRYPTO_DEV_CCREE) := ccree.o
ccree-y := ssi_driver.o ssi_sysfs.o ssi_buffer_mgr.o ssi_request_mgr.o ssi_cipher.o ssi_hash.o ssi_aead.o ssi_ivgen.o ssi_sram_mgr.o ssi_pm.o
ccree-y := ssi_driver.o ssi_buffer_mgr.o ssi_request_mgr.o ssi_cipher.o ssi_hash.o ssi_aead.o ssi_ivgen.o ssi_sram_mgr.o ssi_pm.o
ccree-$(CONFIG_CRYPTO_FIPS) += ssi_fips.o
ccree-$(CONFIG_DEBUG_FS) += cc_debugfs.o

114
drivers/staging/ccree/cc_debugfs.c Normal file
View File

@ -0,0 +1,114 @@
/*
* Copyright (C) 2012-2017 ARM Limited or its affiliates.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include <linux/kernel.h>
#include <linux/debugfs.h>
#include <linux/stringify.h>
#include "ssi_config.h"
#include "ssi_driver.h"
#include "cc_crypto_ctx.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;
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 cc_debugfs_global_init(void)
{
cc_debugfs_dir = debugfs_create_dir("ccree", NULL);
return !cc_debugfs_dir;
}
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 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);
}

33
drivers/staging/ccree/ssi_sysfs.h → drivers/staging/ccree/cc_debugfs.h
View File

@ -14,19 +14,32 @@
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
/* \file ssi_sysfs.h
* ARM CryptoCell sysfs APIs
*/
#ifndef __CC_DEBUGFS_H__
#define __CC_DEBUGFS_H__
#ifndef __CC_SYSFS_H__
#define __CC_SYSFS_H__
#ifdef CONFIG_DEBUG_FS
int cc_debugfs_global_init(void);
void cc_debugfs_global_fini(void);
#include <asm/timex.h>
int cc_debugfs_init(struct cc_drvdata *drvdata);
void cc_debugfs_fini(struct cc_drvdata *drvdata);
/* forward declaration */
struct cc_drvdata;
#else
int ssi_sysfs_init(struct kobject *sys_dev_obj, struct cc_drvdata *drvdata);
void ssi_sysfs_fini(void);
int cc_debugfs_global_init(void)
{
return 0;
}
void cc_debugfs_global_fini(void) {}
int cc_debugfs_init(struct cc_drvdata *drvdata)
{
return 0;
}
void cc_debugfs_fini(struct cc_drvdata *drvdata) {}
#endif
#endif /*__CC_SYSFS_H__*/

1
drivers/staging/ccree/ssi_aead.c
View File

@ -34,7 +34,6 @@
#include "ssi_aead.h"
#include "ssi_request_mgr.h"
#include "ssi_hash.h"
#include "ssi_sysfs.h"
#include "ssi_sram_mgr.h"
#define template_aead template_u.aead

1
drivers/staging/ccree/ssi_cipher.c
View File

@ -32,7 +32,6 @@
#include "ssi_buffer_mgr.h"
#include "ssi_cipher.h"
#include "ssi_request_mgr.h"
#include "ssi_sysfs.h"
#define MAX_ABLKCIPHER_SEQ_LEN 6

2
drivers/staging/ccree/ssi_config.h
View File

@ -28,8 +28,6 @@
//#define CC_DUMP_DESCS
// #define CC_DUMP_BYTES
// #define CC_DEBUG
/* Enable sysfs interface for debugging REE driver */
#define ENABLE_CC_SYSFS
//#define CC_IRQ_DELAY 100000
/* was 32 bit, but for juno's sake it was enlarged to 48 bit */
#define DMA_BIT_MASK_LEN 48

27
drivers/staging/ccree/ssi_driver.c
View File

@ -63,7 +63,7 @@
#include "ssi_driver.h"
#include "ssi_request_mgr.h"
#include "ssi_buffer_mgr.h"
#include "ssi_sysfs.h"
#include "cc_debugfs.h"
#include "ssi_cipher.h"
#include "ssi_aead.h"
#include "ssi_hash.h"
@ -299,18 +299,16 @@ static int init_cc_resources(struct platform_device *plat_dev)
goto post_clk_err;
}
#ifdef ENABLE_CC_SYSFS
rc = ssi_sysfs_init(&dev->kobj, new_drvdata);
rc = cc_debugfs_init(new_drvdata);
if (rc) {
dev_err(dev, "init_stat_db failed\n");
dev_err(dev, "Failed registering debugfs interface\n");
goto post_regs_err;
}
#endif
rc = cc_fips_init(new_drvdata);
if (rc) {
dev_err(dev, "CC_FIPS_INIT failed 0x%x\n", rc);
goto post_sysfs_err;
goto post_debugfs_err;
}
rc = cc_sram_mgr_init(new_drvdata);
if (rc) {
@ -394,10 +392,8 @@ static int init_cc_resources(struct platform_device *plat_dev)
cc_sram_mgr_fini(new_drvdata);
post_fips_init_err:
cc_fips_fini(new_drvdata);
post_sysfs_err:
#ifdef ENABLE_CC_SYSFS
ssi_sysfs_fini();
#endif
post_debugfs_err:
cc_debugfs_fini(new_drvdata);
post_regs_err:
fini_cc_regs(new_drvdata);
post_clk_err:
@ -425,9 +421,7 @@ static void cleanup_cc_resources(struct platform_device *plat_dev)
cc_req_mgr_fini(drvdata);
cc_sram_mgr_fini(drvdata);
cc_fips_fini(drvdata);
#ifdef ENABLE_CC_SYSFS
ssi_sysfs_fini();
#endif
cc_debugfs_fini(drvdata);
fini_cc_regs(drvdata);
cc_clk_off(drvdata);
}
@ -520,6 +514,12 @@ static struct platform_driver cc7x_driver = {
static int __init ccree_init(void)
{
int ret;
ret = cc_debugfs_global_init();
if (ret)
return ret;
return platform_driver_register(&cc7x_driver);
}
module_init(ccree_init);
@ -527,6 +527,7 @@ module_init(ccree_init);
static void __exit ccree_exit(void)
{
platform_driver_unregister(&cc7x_driver);
cc_debugfs_global_fini();
}
module_exit(ccree_exit);

2
drivers/staging/ccree/ssi_driver.h
View File

@ -44,7 +44,6 @@
#include "dx_reg_common.h"
#define CC_SUPPORT_SHA CC_DEV_SHA_MAX
#include "cc_crypto_ctx.h"
#include "ssi_sysfs.h"
#include "hash_defs.h"
#include "cc_hw_queue_defs.h"
#include "ssi_sram_mgr.h"
@ -127,6 +126,7 @@ struct cc_drvdata {
void *fips_handle;
void *ivgen_handle;
void *sram_mgr_handle;
void *debugfs;
struct clk *clk;
bool coherent;
};

1
drivers/staging/ccree/ssi_hash.c
View File

@ -27,7 +27,6 @@
#include "ssi_driver.h"
#include "ssi_request_mgr.h"
#include "ssi_buffer_mgr.h"
#include "ssi_sysfs.h"
#include "ssi_hash.h"
#include "ssi_sram_mgr.h"

1
drivers/staging/ccree/ssi_pm.c
View File

@ -24,7 +24,6 @@
#include "ssi_buffer_mgr.h"
#include "ssi_request_mgr.h"
#include "ssi_sram_mgr.h"
#include "ssi_sysfs.h"
#include "ssi_ivgen.h"
#include "ssi_hash.h"
#include "ssi_pm.h"

1
drivers/staging/ccree/ssi_request_mgr.c
View File

@ -27,7 +27,6 @@
#include "ssi_driver.h"
#include "ssi_buffer_mgr.h"
#include "ssi_request_mgr.h"
#include "ssi_sysfs.h"
#include "ssi_ivgen.h"
#include "ssi_pm.h"

192
drivers/staging/ccree/ssi_sysfs.c
View File

@ -1,192 +0,0 @@
/*
* Copyright (C) 2012-2017 ARM Limited or its affiliates.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include <linux/kernel.h>
#include "ssi_config.h"
#include "ssi_driver.h"
#include "cc_crypto_ctx.h"
#include "ssi_sysfs.h"
#ifdef ENABLE_CC_SYSFS
static struct cc_drvdata *sys_get_drvdata(void);
static ssize_t ssi_sys_regdump_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
struct cc_drvdata *drvdata = sys_get_drvdata();
u32 register_value;
int offset = 0;
register_value = cc_ioread(drvdata, CC_REG(HOST_SIGNATURE));
offset += scnprintf(buf + offset, PAGE_SIZE - offset,
"%s \t(0x%lX)\t 0x%08X\n", "HOST_SIGNATURE ",
CC_HOST_SIGNATURE_REG_OFFSET, register_value);
register_value = cc_ioread(drvdata, CC_REG(HOST_IRR));
offset += scnprintf(buf + offset, PAGE_SIZE - offset,
"%s \t(0x%lX)\t 0x%08X\n", "HOST_IRR ",
CC_HOST_IRR_REG_OFFSET, register_value);
register_value = cc_ioread(drvdata, CC_REG(HOST_POWER_DOWN_EN));
offset += scnprintf(buf + offset, PAGE_SIZE - offset,
"%s \t(0x%lX)\t 0x%08X\n", "HOST_POWER_DOWN_EN ",
CC_HOST_POWER_DOWN_EN_REG_OFFSET, register_value);
register_value = cc_ioread(drvdata, CC_REG(AXIM_MON_ERR));
offset += scnprintf(buf + offset, PAGE_SIZE - offset,
"%s \t(0x%lX)\t 0x%08X\n", "AXIM_MON_ERR ",
CC_AXIM_MON_ERR_REG_OFFSET, register_value);
register_value = cc_ioread(drvdata, CC_REG(DSCRPTR_QUEUE_CONTENT));
offset += scnprintf(buf + offset, PAGE_SIZE - offset,
"%s \t(0x%lX)\t 0x%08X\n", "DSCRPTR_QUEUE_CONTENT",
CC_DSCRPTR_QUEUE_CONTENT_REG_OFFSET,
register_value);
return offset;
}
static ssize_t ssi_sys_help_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
static const char * const help_str[] = {
"cat reg_dump ",
"Print several of CC register values",
};
int i = 0, offset = 0;
offset += scnprintf(buf + offset, PAGE_SIZE - offset, "Usage:\n");
for (i = 0; i < ARRAY_SIZE(help_str); i += 2) {
offset += scnprintf(buf + offset, PAGE_SIZE - offset,
"%s\t\t%s\n", help_str[i],
help_str[i + 1]);
}
return offset;
}
/********************************************************
* SYSFS objects *
********************************************************/
/*
* Structure used to create a directory
* and its attributes in sysfs.
*/
struct sys_dir {
struct kobject *sys_dir_kobj;
struct attribute_group sys_dir_attr_group;
struct attribute **sys_dir_attr_list;
u32 num_of_attrs;
struct cc_drvdata *drvdata; /* Associated driver context */
};
/* top level directory structures */
static struct sys_dir sys_top_dir;
/* TOP LEVEL ATTRIBUTES */
static struct kobj_attribute ssi_sys_top_level_attrs[] = {
__ATTR(dump_regs, 0444, ssi_sys_regdump_show, NULL),
__ATTR(help, 0444, ssi_sys_help_show, NULL),
#if defined CC_CYCLE_COUNT
__ATTR(stats_host, 0664, ssi_sys_stat_host_db_show,
ssi_sys_stats_host_db_clear),
__ATTR(stats_cc, 0664, ssi_sys_stat_cc_db_show,
ssi_sys_stats_cc_db_clear),
#endif
};
static struct cc_drvdata *sys_get_drvdata(void)
{
/* TODO: supporting multiple SeP devices would require avoiding
* global "top_dir" and finding associated "top_dir" by traversing
* up the tree to the kobject which matches one of the top_dir's
*/
return sys_top_dir.drvdata;
}
static int sys_init_dir(struct sys_dir *sys_dir, struct cc_drvdata *drvdata,
struct kobject *parent_dir_kobj, const char *dir_name,
struct kobj_attribute *attrs, u32 num_of_attrs)
{
int i;
memset(sys_dir, 0, sizeof(struct sys_dir));
sys_dir->drvdata = drvdata;
/* initialize directory kobject */
sys_dir->sys_dir_kobj =
kobject_create_and_add(dir_name, parent_dir_kobj);
if (!(sys_dir->sys_dir_kobj))
return -ENOMEM;
/* allocate memory for directory's attributes list */
sys_dir->sys_dir_attr_list =
kcalloc(num_of_attrs + 1, sizeof(struct attribute *),
GFP_KERNEL);
if (!(sys_dir->sys_dir_attr_list)) {
kobject_put(sys_dir->sys_dir_kobj);
return -ENOMEM;
}
sys_dir->num_of_attrs = num_of_attrs;
/* initialize attributes list */
for (i = 0; i < num_of_attrs; ++i)
sys_dir->sys_dir_attr_list[i] = &attrs[i].attr;
/* last list entry should be NULL */
sys_dir->sys_dir_attr_list[num_of_attrs] = NULL;
sys_dir->sys_dir_attr_group.attrs = sys_dir->sys_dir_attr_list;
return sysfs_create_group(sys_dir->sys_dir_kobj,
&sys_dir->sys_dir_attr_group);
}
static void sys_free_dir(struct sys_dir *sys_dir)
{
if (!sys_dir)
return;
kfree(sys_dir->sys_dir_attr_list);
if (sys_dir->sys_dir_kobj) {
sysfs_remove_group(sys_dir->sys_dir_kobj,
&sys_dir->sys_dir_attr_group);
kobject_put(sys_dir->sys_dir_kobj);
}
}
int ssi_sysfs_init(struct kobject *sys_dev_obj, struct cc_drvdata *drvdata)
{
int retval;
struct device *dev = drvdata_to_dev(drvdata);
dev_info(dev, "setup sysfs under %s\n", sys_dev_obj->name);
/* Initialize top directory */
retval = sys_init_dir(&sys_top_dir, drvdata, sys_dev_obj, "cc_info",
ssi_sys_top_level_attrs,
ARRAY_SIZE(ssi_sys_top_level_attrs));
return retval;
}
void ssi_sysfs_fini(void)
{
sys_free_dir(&sys_top_dir);
}
#endif /*ENABLE_CC_SYSFS*/