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// SPDX-License-Identifier: (BSD-3-Clause OR GPL-2.0-only)
/* Copyright(c) 2022 Intel Corporation */
#include <linux/device.h>
#include <linux/errno.h>
#include <linux/pci.h>
#include "adf_accel_devices.h"
#include "adf_cfg.h"
#include "adf_common_drv.h"
static const char * const state_operations[] = {
[DEV_DOWN] = "down",
[DEV_UP] = "up",
};
static ssize_t state_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct adf_accel_dev *accel_dev;
char *state;
accel_dev = adf_devmgr_pci_to_accel_dev(to_pci_dev(dev));
if (!accel_dev)
return -EINVAL;
state = adf_dev_started(accel_dev) ? "up" : "down";
return sysfs_emit(buf, "%s\n", state);
}
static ssize_t state_store(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct adf_accel_dev *accel_dev;
u32 accel_id;
int ret;
accel_dev = adf_devmgr_pci_to_accel_dev(to_pci_dev(dev));
if (!accel_dev)
return -EINVAL;
accel_id = accel_dev->accel_id;
if (adf_devmgr_in_reset(accel_dev) || adf_dev_in_use(accel_dev)) {
dev_info(dev, "Device qat_dev%d is busy\n", accel_id);
return -EBUSY;
}
ret = sysfs_match_string(state_operations, buf);
if (ret < 0)
return ret;
switch (ret) {
case DEV_DOWN:
dev_info(dev, "Stopping device qat_dev%d\n", accel_id);
ret = adf_dev_down(accel_dev, true);
if (ret < 0)
return -EINVAL;
break;
case DEV_UP:
dev_info(dev, "Starting device qat_dev%d\n", accel_id);
ret = adf_dev_up(accel_dev, true);
if (ret == -EALREADY) {
break;
} else if (ret) {
dev_err(dev, "Failed to start device qat_dev%d\n",
accel_id);
adf_dev_down(accel_dev, true);
return ret;
}
break;
default:
return -EINVAL;
}
return count;
}
static const char * const services_operations[] = {
ADF_CFG_CY,
ADF_CFG_DC,
};
static ssize_t cfg_services_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
char services[ADF_CFG_MAX_VAL_LEN_IN_BYTES] = {0};
struct adf_accel_dev *accel_dev;
int ret;
accel_dev = adf_devmgr_pci_to_accel_dev(to_pci_dev(dev));
if (!accel_dev)
return -EINVAL;
ret = adf_cfg_get_param_value(accel_dev, ADF_GENERAL_SEC,
ADF_SERVICES_ENABLED, services);
if (ret)
return ret;
return sysfs_emit(buf, "%s\n", services);
}
static int adf_sysfs_update_dev_config(struct adf_accel_dev *accel_dev,
const char *services)
{
return adf_cfg_add_key_value_param(accel_dev, ADF_GENERAL_SEC,
ADF_SERVICES_ENABLED, services,
ADF_STR);
}
static ssize_t cfg_services_store(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct adf_hw_device_data *hw_data;
struct adf_accel_dev *accel_dev;
int ret;
ret = sysfs_match_string(services_operations, buf);
if (ret < 0)
return ret;
accel_dev = adf_devmgr_pci_to_accel_dev(to_pci_dev(dev));
if (!accel_dev)
return -EINVAL;
if (adf_dev_started(accel_dev)) {
dev_info(dev, "Device qat_dev%d must be down to reconfigure the service.\n",
accel_dev->accel_id);
return -EINVAL;
}
ret = adf_sysfs_update_dev_config(accel_dev, services_operations[ret]);
if (ret < 0)
return ret;
hw_data = GET_HW_DATA(accel_dev);
/* Update capabilities mask after change in configuration.
* A call to this function is required as capabilities are, at the
* moment, tied to configuration
*/
hw_data->accel_capabilities_mask = hw_data->get_accel_cap(accel_dev);
if (!hw_data->accel_capabilities_mask)
return -EINVAL;
return count;
}
static DEVICE_ATTR_RW(state);
static DEVICE_ATTR_RW(cfg_services);
static struct attribute *qat_attrs[] = {
&dev_attr_state.attr,
&dev_attr_cfg_services.attr,
NULL,
};
static struct attribute_group qat_group = {
.attrs = qat_attrs,
.name = "qat",
};
int adf_sysfs_init(struct adf_accel_dev *accel_dev)
{
int ret;
ret = devm_device_add_group(&GET_DEV(accel_dev), &qat_group);
if (ret) {
dev_err(&GET_DEV(accel_dev),
"Failed to create qat attribute group: %d\n", ret);
}
return ret;
}
EXPORT_SYMBOL_GPL(adf_sysfs_init);
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