From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:49:45 +0200 Subject: Adding upstream version 6.1.76. Signed-off-by: Daniel Baumann --- drivers/crypto/qat/qat_common/adf_cfg.c | 339 ++++++++++++++++++++++++++++++++ 1 file changed, 339 insertions(+) create mode 100644 drivers/crypto/qat/qat_common/adf_cfg.c (limited to 'drivers/crypto/qat/qat_common/adf_cfg.c') diff --git a/drivers/crypto/qat/qat_common/adf_cfg.c b/drivers/crypto/qat/qat_common/adf_cfg.c new file mode 100644 index 000000000..1931e5b37 --- /dev/null +++ b/drivers/crypto/qat/qat_common/adf_cfg.c @@ -0,0 +1,339 @@ +// SPDX-License-Identifier: (BSD-3-Clause OR GPL-2.0-only) +/* Copyright(c) 2014 - 2020 Intel Corporation */ +#include +#include +#include +#include +#include "adf_accel_devices.h" +#include "adf_cfg.h" +#include "adf_common_drv.h" + +static DEFINE_MUTEX(qat_cfg_read_lock); + +static void *qat_dev_cfg_start(struct seq_file *sfile, loff_t *pos) +{ + struct adf_cfg_device_data *dev_cfg = sfile->private; + + mutex_lock(&qat_cfg_read_lock); + return seq_list_start(&dev_cfg->sec_list, *pos); +} + +static int qat_dev_cfg_show(struct seq_file *sfile, void *v) +{ + struct list_head *list; + struct adf_cfg_section *sec = + list_entry(v, struct adf_cfg_section, list); + + seq_printf(sfile, "[%s]\n", sec->name); + list_for_each(list, &sec->param_head) { + struct adf_cfg_key_val *ptr = + list_entry(list, struct adf_cfg_key_val, list); + seq_printf(sfile, "%s = %s\n", ptr->key, ptr->val); + } + return 0; +} + +static void *qat_dev_cfg_next(struct seq_file *sfile, void *v, loff_t *pos) +{ + struct adf_cfg_device_data *dev_cfg = sfile->private; + + return seq_list_next(v, &dev_cfg->sec_list, pos); +} + +static void qat_dev_cfg_stop(struct seq_file *sfile, void *v) +{ + mutex_unlock(&qat_cfg_read_lock); +} + +static const struct seq_operations qat_dev_cfg_sops = { + .start = qat_dev_cfg_start, + .next = qat_dev_cfg_next, + .stop = qat_dev_cfg_stop, + .show = qat_dev_cfg_show +}; + +DEFINE_SEQ_ATTRIBUTE(qat_dev_cfg); + +/** + * adf_cfg_dev_add() - Create an acceleration device configuration table. + * @accel_dev: Pointer to acceleration device. + * + * Function creates a configuration table for the given acceleration device. + * The table stores device specific config values. + * To be used by QAT device specific drivers. + * + * Return: 0 on success, error code otherwise. + */ +int adf_cfg_dev_add(struct adf_accel_dev *accel_dev) +{ + struct adf_cfg_device_data *dev_cfg_data; + + dev_cfg_data = kzalloc(sizeof(*dev_cfg_data), GFP_KERNEL); + if (!dev_cfg_data) + return -ENOMEM; + INIT_LIST_HEAD(&dev_cfg_data->sec_list); + init_rwsem(&dev_cfg_data->lock); + accel_dev->cfg = dev_cfg_data; + + /* accel_dev->debugfs_dir should always be non-NULL here */ + dev_cfg_data->debug = debugfs_create_file("dev_cfg", S_IRUSR, + accel_dev->debugfs_dir, + dev_cfg_data, + &qat_dev_cfg_fops); + return 0; +} +EXPORT_SYMBOL_GPL(adf_cfg_dev_add); + +static void adf_cfg_section_del_all(struct list_head *head); + +void adf_cfg_del_all(struct adf_accel_dev *accel_dev) +{ + struct adf_cfg_device_data *dev_cfg_data = accel_dev->cfg; + + down_write(&dev_cfg_data->lock); + adf_cfg_section_del_all(&dev_cfg_data->sec_list); + up_write(&dev_cfg_data->lock); + clear_bit(ADF_STATUS_CONFIGURED, &accel_dev->status); +} + +/** + * adf_cfg_dev_remove() - Clears acceleration device configuration table. + * @accel_dev: Pointer to acceleration device. + * + * Function removes configuration table from the given acceleration device + * and frees all allocated memory. + * To be used by QAT device specific drivers. + * + * Return: void + */ +void adf_cfg_dev_remove(struct adf_accel_dev *accel_dev) +{ + struct adf_cfg_device_data *dev_cfg_data = accel_dev->cfg; + + if (!dev_cfg_data) + return; + + down_write(&dev_cfg_data->lock); + adf_cfg_section_del_all(&dev_cfg_data->sec_list); + up_write(&dev_cfg_data->lock); + debugfs_remove(dev_cfg_data->debug); + kfree(dev_cfg_data); + accel_dev->cfg = NULL; +} +EXPORT_SYMBOL_GPL(adf_cfg_dev_remove); + +static void adf_cfg_keyval_add(struct adf_cfg_key_val *new, + struct adf_cfg_section *sec) +{ + list_add_tail(&new->list, &sec->param_head); +} + +static void adf_cfg_keyval_remove(const char *key, struct adf_cfg_section *sec) +{ + struct list_head *head = &sec->param_head; + struct list_head *list_ptr, *tmp; + + list_for_each_prev_safe(list_ptr, tmp, head) { + struct adf_cfg_key_val *ptr = + list_entry(list_ptr, struct adf_cfg_key_val, list); + + if (strncmp(ptr->key, key, sizeof(ptr->key))) + continue; + + list_del(list_ptr); + kfree(ptr); + break; + } +} + +static void adf_cfg_keyval_del_all(struct list_head *head) +{ + struct list_head *list_ptr, *tmp; + + list_for_each_prev_safe(list_ptr, tmp, head) { + struct adf_cfg_key_val *ptr = + list_entry(list_ptr, struct adf_cfg_key_val, list); + list_del(list_ptr); + kfree(ptr); + } +} + +static void adf_cfg_section_del_all(struct list_head *head) +{ + struct adf_cfg_section *ptr; + struct list_head *list, *tmp; + + list_for_each_prev_safe(list, tmp, head) { + ptr = list_entry(list, struct adf_cfg_section, list); + adf_cfg_keyval_del_all(&ptr->param_head); + list_del(list); + kfree(ptr); + } +} + +static struct adf_cfg_key_val *adf_cfg_key_value_find(struct adf_cfg_section *s, + const char *key) +{ + struct list_head *list; + + list_for_each(list, &s->param_head) { + struct adf_cfg_key_val *ptr = + list_entry(list, struct adf_cfg_key_val, list); + if (!strcmp(ptr->key, key)) + return ptr; + } + return NULL; +} + +static struct adf_cfg_section *adf_cfg_sec_find(struct adf_accel_dev *accel_dev, + const char *sec_name) +{ + struct adf_cfg_device_data *cfg = accel_dev->cfg; + struct list_head *list; + + list_for_each(list, &cfg->sec_list) { + struct adf_cfg_section *ptr = + list_entry(list, struct adf_cfg_section, list); + if (!strcmp(ptr->name, sec_name)) + return ptr; + } + return NULL; +} + +static int adf_cfg_key_val_get(struct adf_accel_dev *accel_dev, + const char *sec_name, + const char *key_name, + char *val) +{ + struct adf_cfg_section *sec = adf_cfg_sec_find(accel_dev, sec_name); + struct adf_cfg_key_val *keyval = NULL; + + if (sec) + keyval = adf_cfg_key_value_find(sec, key_name); + if (keyval) { + memcpy(val, keyval->val, ADF_CFG_MAX_VAL_LEN_IN_BYTES); + return 0; + } + return -ENODATA; +} + +/** + * adf_cfg_add_key_value_param() - Add key-value config entry to config table. + * @accel_dev: Pointer to acceleration device. + * @section_name: Name of the section where the param will be added + * @key: The key string + * @val: Value pain for the given @key + * @type: Type - string, int or address + * + * Function adds configuration key - value entry in the appropriate section + * in the given acceleration device. If the key exists already, the value + * is updated. + * To be used by QAT device specific drivers. + * + * Return: 0 on success, error code otherwise. + */ +int adf_cfg_add_key_value_param(struct adf_accel_dev *accel_dev, + const char *section_name, + const char *key, const void *val, + enum adf_cfg_val_type type) +{ + struct adf_cfg_device_data *cfg = accel_dev->cfg; + struct adf_cfg_key_val *key_val; + struct adf_cfg_section *section = adf_cfg_sec_find(accel_dev, + section_name); + char temp_val[ADF_CFG_MAX_VAL_LEN_IN_BYTES]; + + if (!section) + return -EFAULT; + + key_val = kzalloc(sizeof(*key_val), GFP_KERNEL); + if (!key_val) + return -ENOMEM; + + INIT_LIST_HEAD(&key_val->list); + strscpy(key_val->key, key, sizeof(key_val->key)); + + if (type == ADF_DEC) { + snprintf(key_val->val, ADF_CFG_MAX_VAL_LEN_IN_BYTES, + "%ld", (*((long *)val))); + } else if (type == ADF_STR) { + strscpy(key_val->val, (char *)val, sizeof(key_val->val)); + } else if (type == ADF_HEX) { + snprintf(key_val->val, ADF_CFG_MAX_VAL_LEN_IN_BYTES, + "0x%lx", (unsigned long)val); + } else { + dev_err(&GET_DEV(accel_dev), "Unknown type given.\n"); + kfree(key_val); + return -EINVAL; + } + key_val->type = type; + + /* Add the key-value pair as below policy: + * 1. if the key doesn't exist, add it; + * 2. if the key already exists with a different value then update it + * to the new value (the key is deleted and the newly created + * key_val containing the new value is added to the database); + * 3. if the key exists with the same value, then return without doing + * anything (the newly created key_val is freed). + */ + if (!adf_cfg_key_val_get(accel_dev, section_name, key, temp_val)) { + if (strncmp(temp_val, key_val->val, sizeof(temp_val))) { + adf_cfg_keyval_remove(key, section); + } else { + kfree(key_val); + return 0; + } + } + + down_write(&cfg->lock); + adf_cfg_keyval_add(key_val, section); + up_write(&cfg->lock); + return 0; +} +EXPORT_SYMBOL_GPL(adf_cfg_add_key_value_param); + +/** + * adf_cfg_section_add() - Add config section entry to config table. + * @accel_dev: Pointer to acceleration device. + * @name: Name of the section + * + * Function adds configuration section where key - value entries + * will be stored. + * To be used by QAT device specific drivers. + * + * Return: 0 on success, error code otherwise. + */ +int adf_cfg_section_add(struct adf_accel_dev *accel_dev, const char *name) +{ + struct adf_cfg_device_data *cfg = accel_dev->cfg; + struct adf_cfg_section *sec = adf_cfg_sec_find(accel_dev, name); + + if (sec) + return 0; + + sec = kzalloc(sizeof(*sec), GFP_KERNEL); + if (!sec) + return -ENOMEM; + + strscpy(sec->name, name, sizeof(sec->name)); + INIT_LIST_HEAD(&sec->param_head); + down_write(&cfg->lock); + list_add_tail(&sec->list, &cfg->sec_list); + up_write(&cfg->lock); + return 0; +} +EXPORT_SYMBOL_GPL(adf_cfg_section_add); + +int adf_cfg_get_param_value(struct adf_accel_dev *accel_dev, + const char *section, const char *name, + char *value) +{ + struct adf_cfg_device_data *cfg = accel_dev->cfg; + int ret; + + down_read(&cfg->lock); + ret = adf_cfg_key_val_get(accel_dev, section, name, value); + up_read(&cfg->lock); + return ret; +} +EXPORT_SYMBOL_GPL(adf_cfg_get_param_value); -- cgit v1.2.3