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@xxxxxxxxxxxxx> --- drivers/staging/ccree/Makefile | 3 +- drivers/staging/ccree/cc_debugfs.c | 114 +++++++++++++++++++ drivers/staging/ccree/cc_debugfs.h | 45 ++++++++ drivers/staging/ccree/ssi_aead.c | 1 - drivers/staging/ccree/ssi_cipher.c | 1 - drivers/staging/ccree/ssi_config.h | 2 - drivers/staging/ccree/ssi_driver.c | 27 ++--- drivers/staging/ccree/ssi_driver.h | 2 +- drivers/staging/ccree/ssi_hash.c | 1 - drivers/staging/ccree/ssi_pm.c | 1 - drivers/staging/ccree/ssi_request_mgr.c | 1 - drivers/staging/ccree/ssi_sysfs.c | 192 -------------------------------- drivers/staging/ccree/ssi_sysfs.h | 32 ------ 13 files changed, 176 insertions(+), 246 deletions(-) create mode 100644 drivers/staging/ccree/cc_debugfs.c create mode 100644 drivers/staging/ccree/cc_debugfs.h delete mode 100644 drivers/staging/ccree/ssi_sysfs.c delete mode 100644 drivers/staging/ccree/ssi_sysfs.h diff --git a/drivers/staging/ccree/Makefile b/drivers/staging/ccree/Makefile index ae702f3..ab9f073 100644 --- a/drivers/staging/ccree/Makefile +++ b/drivers/staging/ccree/Makefile @@ -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 diff --git a/drivers/staging/ccree/cc_debugfs.c b/drivers/staging/ccree/cc_debugfs.c new file mode 100644 index 0000000..7768a7b --- /dev/null +++ b/drivers/staging/ccree/cc_debugfs.c @@ -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); +} diff --git a/drivers/staging/ccree/cc_debugfs.h b/drivers/staging/ccree/cc_debugfs.h new file mode 100644 index 0000000..edfe9ba --- /dev/null +++ b/drivers/staging/ccree/cc_debugfs.h @@ -0,0 +1,45 @@ +/* + * 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/>. + */ + +#ifndef __CC_DEBUGFS_H__ +#define __CC_DEBUGFS_H__ + +#ifdef CONFIG_DEBUG_FS +int cc_debugfs_global_init(void); +void cc_debugfs_global_fini(void); + +int cc_debugfs_init(struct cc_drvdata *drvdata); +void cc_debugfs_fini(struct cc_drvdata *drvdata); + +#else + +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__*/ diff --git a/drivers/staging/ccree/ssi_aead.c b/drivers/staging/ccree/ssi_aead.c index 12ceb119..dde6797 100644 --- a/drivers/staging/ccree/ssi_aead.c +++ b/drivers/staging/ccree/ssi_aead.c @@ -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 diff --git a/drivers/staging/ccree/ssi_cipher.c b/drivers/staging/ccree/ssi_cipher.c index 791fe75..f940568 100644 --- a/drivers/staging/ccree/ssi_cipher.c +++ b/drivers/staging/ccree/ssi_cipher.c @@ -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 diff --git a/drivers/staging/ccree/ssi_config.h b/drivers/staging/ccree/ssi_config.h index ee2d310..15725cc 100644 --- a/drivers/staging/ccree/ssi_config.h +++ b/drivers/staging/ccree/ssi_config.h @@ -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 diff --git a/drivers/staging/ccree/ssi_driver.c b/drivers/staging/ccree/ssi_driver.c index 5427c7f..14705dc 100644 --- a/drivers/staging/ccree/ssi_driver.c +++ b/drivers/staging/ccree/ssi_driver.c @@ -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); diff --git a/drivers/staging/ccree/ssi_driver.h b/drivers/staging/ccree/ssi_driver.h index 35e1b72..4e05386 100644 --- a/drivers/staging/ccree/ssi_driver.h +++ b/drivers/staging/ccree/ssi_driver.h @@ -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; }; diff --git a/drivers/staging/ccree/ssi_hash.c b/drivers/staging/ccree/ssi_hash.c index 5794ab6..0aea404 100644 --- a/drivers/staging/ccree/ssi_hash.c +++ b/drivers/staging/ccree/ssi_hash.c @@ -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" diff --git a/drivers/staging/ccree/ssi_pm.c b/drivers/staging/ccree/ssi_pm.c index 0db935d..abc715e 100644 --- a/drivers/staging/ccree/ssi_pm.c +++ b/drivers/staging/ccree/ssi_pm.c @@ -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" diff --git a/drivers/staging/ccree/ssi_request_mgr.c b/drivers/staging/ccree/ssi_request_mgr.c index 480e6d3..07b9404 100644 --- a/drivers/staging/ccree/ssi_request_mgr.c +++ b/drivers/staging/ccree/ssi_request_mgr.c @@ -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" diff --git a/drivers/staging/ccree/ssi_sysfs.c b/drivers/staging/ccree/ssi_sysfs.c deleted file mode 100644 index b2e58f5..0000000 --- a/drivers/staging/ccree/ssi_sysfs.c +++ /dev/null @@ -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*/ - diff --git a/drivers/staging/ccree/ssi_sysfs.h b/drivers/staging/ccree/ssi_sysfs.h deleted file mode 100644 index 9833d18..0000000 --- a/drivers/staging/ccree/ssi_sysfs.h +++ /dev/null @@ -1,32 +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/>. - */ - -/* \file ssi_sysfs.h - * ARM CryptoCell sysfs APIs - */ - -#ifndef __CC_SYSFS_H__ -#define __CC_SYSFS_H__ - -#include <asm/timex.h> - -/* forward declaration */ -struct cc_drvdata; - -int ssi_sysfs_init(struct kobject *sys_dev_obj, struct cc_drvdata *drvdata); -void ssi_sysfs_fini(void); - -#endif /*__CC_SYSFS_H__*/ -- 2.7.4
