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
state_show(struct device * dev,struct device_attribute * attr,char * buf)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
state_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)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 == -EALREADY) {
65 break;
66 } else if (ret) {
67 dev_err(dev, "Failed to start device qat_dev%d\n",
68 accel_id);
69 adf_dev_down(accel_dev, true);
70 return ret;
71 }
72 break;
73 default:
74 return -EINVAL;
75 }
76
77 return count;
78 }
79
80 static const char * const services_operations[] = {
81 ADF_CFG_CY,
82 ADF_CFG_DC,
83 };
84
cfg_services_show(struct device * dev,struct device_attribute * attr,char * buf)85 static ssize_t cfg_services_show(struct device *dev, struct device_attribute *attr,
86 char *buf)
87 {
88 char services[ADF_CFG_MAX_VAL_LEN_IN_BYTES] = {0};
89 struct adf_accel_dev *accel_dev;
90 int ret;
91
92 accel_dev = adf_devmgr_pci_to_accel_dev(to_pci_dev(dev));
93 if (!accel_dev)
94 return -EINVAL;
95
96 ret = adf_cfg_get_param_value(accel_dev, ADF_GENERAL_SEC,
97 ADF_SERVICES_ENABLED, services);
98 if (ret)
99 return ret;
100
101 return sysfs_emit(buf, "%s\n", services);
102 }
103
adf_sysfs_update_dev_config(struct adf_accel_dev * accel_dev,const char * services)104 static int adf_sysfs_update_dev_config(struct adf_accel_dev *accel_dev,
105 const char *services)
106 {
107 return adf_cfg_add_key_value_param(accel_dev, ADF_GENERAL_SEC,
108 ADF_SERVICES_ENABLED, services,
109 ADF_STR);
110 }
111
cfg_services_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)112 static ssize_t cfg_services_store(struct device *dev, struct device_attribute *attr,
113 const char *buf, size_t count)
114 {
115 struct adf_hw_device_data *hw_data;
116 struct adf_accel_dev *accel_dev;
117 int ret;
118
119 ret = sysfs_match_string(services_operations, buf);
120 if (ret < 0)
121 return ret;
122
123 accel_dev = adf_devmgr_pci_to_accel_dev(to_pci_dev(dev));
124 if (!accel_dev)
125 return -EINVAL;
126
127 if (adf_dev_started(accel_dev)) {
128 dev_info(dev, "Device qat_dev%d must be down to reconfigure the service.\n",
129 accel_dev->accel_id);
130 return -EINVAL;
131 }
132
133 ret = adf_sysfs_update_dev_config(accel_dev, services_operations[ret]);
134 if (ret < 0)
135 return ret;
136
137 hw_data = GET_HW_DATA(accel_dev);
138
139 /* Update capabilities mask after change in configuration.
140 * A call to this function is required as capabilities are, at the
141 * moment, tied to configuration
142 */
143 hw_data->accel_capabilities_mask = hw_data->get_accel_cap(accel_dev);
144 if (!hw_data->accel_capabilities_mask)
145 return -EINVAL;
146
147 return count;
148 }
149
150 static DEVICE_ATTR_RW(state);
151 static DEVICE_ATTR_RW(cfg_services);
152
153 static struct attribute *qat_attrs[] = {
154 &dev_attr_state.attr,
155 &dev_attr_cfg_services.attr,
156 NULL,
157 };
158
159 static struct attribute_group qat_group = {
160 .attrs = qat_attrs,
161 .name = "qat",
162 };
163
adf_sysfs_init(struct adf_accel_dev * accel_dev)164 int adf_sysfs_init(struct adf_accel_dev *accel_dev)
165 {
166 int ret;
167
168 ret = devm_device_add_group(&GET_DEV(accel_dev), &qat_group);
169 if (ret) {
170 dev_err(&GET_DEV(accel_dev),
171 "Failed to create qat attribute group: %d\n", ret);
172 }
173
174 return ret;
175 }
176 EXPORT_SYMBOL_GPL(adf_sysfs_init);
177