diff options
Diffstat (limited to 'drivers/staging/ccree/ssi_sysfs.c')
| -rw-r--r-- | drivers/staging/ccree/ssi_sysfs.c | 172 |
1 files changed, 0 insertions, 172 deletions
diff --git a/drivers/staging/ccree/ssi_sysfs.c b/drivers/staging/ccree/ssi_sysfs.c deleted file mode 100644 index 5d39f15cdb59..000000000000 --- a/drivers/staging/ccree/ssi_sysfs.c +++ /dev/null @@ -1,172 +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 ssi_drvdata *sys_get_drvdata(void); - -static ssize_t ssi_sys_regdump_show(struct kobject *kobj, - struct kobj_attribute *attr, char *buf) -{ - struct ssi_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 ", DX_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 ", DX_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 ", DX_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 ", DX_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", DX_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) -{ - char *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 ssi_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 ssi_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 ssi_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) - kobject_put(sys_dir->sys_dir_kobj); -} - -int ssi_sysfs_init(struct kobject *sys_dev_obj, struct ssi_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*/ - |