From d4cfb144f60551d80732c93c892fe76fc8df860d Mon Sep 17 00:00:00 2001 From: Giovanni Cabiddu Date: Mon, 27 Jun 2022 09:36:52 +0100 Subject: crypto: qat - expose device config through sysfs for 4xxx qat_4xxx devices can be configured to allow either crypto or compression operations. At the moment, devices are configured statically according to the following rule: - odd numbered devices assigned to compression services - even numbered devices assigned to crypto services Expose the sysfs attribute /sys/bus/pci/devices//qat/cfg_services to allow to detect the configuration of a device and to change it. The `cfg_service` attribute is only exposed for qat_4xxx devices and it is limited to two configurations: (1) "sym;asym" for crypto services and "dc" for compression services. Signed-off-by: Giovanni Cabiddu Co-developed-by: Tomasz Kowallik Signed-off-by: Tomasz Kowallik Reviewed-by: Adam Guerin Reviewed-by: Fiona Trahe Reviewed-by: Wojciech Ziemba Reviewed-by: Vladis Dronov Signed-off-by: Herbert Xu --- drivers/crypto/qat/qat_common/adf_sysfs.c | 80 +++++++++++++++++++++++++++++-- 1 file changed, 76 insertions(+), 4 deletions(-) (limited to 'drivers/crypto/qat') diff --git a/drivers/crypto/qat/qat_common/adf_sysfs.c b/drivers/crypto/qat/qat_common/adf_sysfs.c index 8f47a5694dd7..e8b078e719c2 100644 --- a/drivers/crypto/qat/qat_common/adf_sysfs.c +++ b/drivers/crypto/qat/qat_common/adf_sysfs.c @@ -58,8 +58,9 @@ static ssize_t state_store(struct device *dev, struct device_attribute *attr, dev_info(dev, "Stopping device qat_dev%d\n", accel_id); - adf_dev_stop(accel_dev); - adf_dev_shutdown(accel_dev); + ret = adf_dev_shutdown_cache_cfg(accel_dev); + if (ret < 0) + return -EINVAL; break; case DEV_UP: @@ -80,8 +81,7 @@ static ssize_t state_store(struct device *dev, struct device_attribute *attr, if (ret < 0) { dev_err(dev, "Failed to start device qat_dev%d\n", accel_id); - adf_dev_stop(accel_dev); - adf_dev_shutdown(accel_dev); + adf_dev_shutdown_cache_cfg(accel_dev); return ret; } break; @@ -92,10 +92,82 @@ static ssize_t state_store(struct device *dev, struct device_attribute *attr, 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, }; -- cgit v1.2.3