1 // SPDX-License-Identifier: (BSD-3-Clause OR GPL-2.0-only) 2 /* Copyright(c) 2022 Intel Corporation */ 3 #include <linux/device.h> 4 #include <linux/errno.h> 5 #include <linux/pci.h> 6 #include "adf_accel_devices.h" 7 #include "adf_cfg.h" 8 #include "adf_common_drv.h" 9 10 static const char * const state_operations[] = { 11 [DEV_DOWN] = "down", 12 [DEV_UP] = "up", 13 }; 14 15 static ssize_t state_show(struct device *dev, struct device_attribute *attr, 16 char *buf) 17 { 18 struct adf_accel_dev *accel_dev; 19 char *state; 20 21 accel_dev = adf_devmgr_pci_to_accel_dev(to_pci_dev(dev)); 22 if (!accel_dev) 23 return -EINVAL; 24 25 state = adf_dev_started(accel_dev) ? "up" : "down"; 26 return sysfs_emit(buf, "%s\n", state); 27 } 28 29 static ssize_t state_store(struct device *dev, struct device_attribute *attr, 30 const char *buf, size_t count) 31 { 32 struct adf_accel_dev *accel_dev; 33 u32 accel_id; 34 int ret; 35 36 accel_dev = adf_devmgr_pci_to_accel_dev(to_pci_dev(dev)); 37 if (!accel_dev) 38 return -EINVAL; 39 40 accel_id = accel_dev->accel_id; 41 42 if (adf_devmgr_in_reset(accel_dev) || adf_dev_in_use(accel_dev)) { 43 dev_info(dev, "Device qat_dev%d is busy\n", accel_id); 44 return -EBUSY; 45 } 46 47 ret = sysfs_match_string(state_operations, buf); 48 if (ret < 0) 49 return ret; 50 51 switch (ret) { 52 case DEV_DOWN: 53 dev_info(dev, "Stopping device qat_dev%d\n", accel_id); 54 55 ret = adf_dev_down(accel_dev, true); 56 if (ret < 0) 57 return -EINVAL; 58 59 break; 60 case DEV_UP: 61 dev_info(dev, "Starting device qat_dev%d\n", accel_id); 62 63 ret = adf_dev_up(accel_dev, true); 64 if (ret < 0) { 65 dev_err(dev, "Failed to start device qat_dev%d\n", 66 accel_id); 67 adf_dev_down(accel_dev, true); 68 return ret; 69 } 70 break; 71 default: 72 return -EINVAL; 73 } 74 75 return count; 76 } 77 78 static const char * const services_operations[] = { 79 ADF_CFG_CY, 80 ADF_CFG_DC, 81 }; 82 83 static ssize_t cfg_services_show(struct device *dev, struct device_attribute *attr, 84 char *buf) 85 { 86 char services[ADF_CFG_MAX_VAL_LEN_IN_BYTES] = {0}; 87 struct adf_accel_dev *accel_dev; 88 int ret; 89 90 accel_dev = adf_devmgr_pci_to_accel_dev(to_pci_dev(dev)); 91 if (!accel_dev) 92 return -EINVAL; 93 94 ret = adf_cfg_get_param_value(accel_dev, ADF_GENERAL_SEC, 95 ADF_SERVICES_ENABLED, services); 96 if (ret) 97 return ret; 98 99 return sysfs_emit(buf, "%s\n", services); 100 } 101 102 static int adf_sysfs_update_dev_config(struct adf_accel_dev *accel_dev, 103 const char *services) 104 { 105 return adf_cfg_add_key_value_param(accel_dev, ADF_GENERAL_SEC, 106 ADF_SERVICES_ENABLED, services, 107 ADF_STR); 108 } 109 110 static ssize_t cfg_services_store(struct device *dev, struct device_attribute *attr, 111 const char *buf, size_t count) 112 { 113 struct adf_hw_device_data *hw_data; 114 struct adf_accel_dev *accel_dev; 115 int ret; 116 117 ret = sysfs_match_string(services_operations, buf); 118 if (ret < 0) 119 return ret; 120 121 accel_dev = adf_devmgr_pci_to_accel_dev(to_pci_dev(dev)); 122 if (!accel_dev) 123 return -EINVAL; 124 125 if (adf_dev_started(accel_dev)) { 126 dev_info(dev, "Device qat_dev%d must be down to reconfigure the service.\n", 127 accel_dev->accel_id); 128 return -EINVAL; 129 } 130 131 ret = adf_sysfs_update_dev_config(accel_dev, services_operations[ret]); 132 if (ret < 0) 133 return ret; 134 135 hw_data = GET_HW_DATA(accel_dev); 136 137 /* Update capabilities mask after change in configuration. 138 * A call to this function is required as capabilities are, at the 139 * moment, tied to configuration 140 */ 141 hw_data->accel_capabilities_mask = hw_data->get_accel_cap(accel_dev); 142 if (!hw_data->accel_capabilities_mask) 143 return -EINVAL; 144 145 return count; 146 } 147 148 static DEVICE_ATTR_RW(state); 149 static DEVICE_ATTR_RW(cfg_services); 150 151 static struct attribute *qat_attrs[] = { 152 &dev_attr_state.attr, 153 &dev_attr_cfg_services.attr, 154 NULL, 155 }; 156 157 static struct attribute_group qat_group = { 158 .attrs = qat_attrs, 159 .name = "qat", 160 }; 161 162 int adf_sysfs_init(struct adf_accel_dev *accel_dev) 163 { 164 int ret; 165 166 ret = devm_device_add_group(&GET_DEV(accel_dev), &qat_group); 167 if (ret) { 168 dev_err(&GET_DEV(accel_dev), 169 "Failed to create qat attribute group: %d\n", ret); 170 } 171 172 return ret; 173 } 174 EXPORT_SYMBOL_GPL(adf_sysfs_init); 175