1 /*
2 * Copyright (c) 2020 The Linux Foundation. All rights reserved.
3 * Copyright (c) 2022-2023 Qualcomm Innovation Center, Inc. All rights reserved.
4 *
5 * Permission to use, copy, modify, and/or distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16 */
17
18 /**
19 * DOC: wlan_hdd_sysfs_rts_cts.c
20 *
21 * implementation for creating sysfs file rts_cts
22 */
23
24 #include <wlan_hdd_includes.h>
25 #include "osif_vdev_sync.h"
26 #include <wlan_hdd_sysfs.h>
27 #include "wlan_hdd_sysfs_rts_cts.h"
28 #include <wlan_mlme_ucfg_api.h>
29 #include <cfg_ucfg_api.h>
30 #include <cfg_mlme_threshold.h>
31 #include <wma_api.h>
32
33 static ssize_t
__hdd_sysfs_rts_cts_store(struct net_device * net_dev,char const * buf,size_t count)34 __hdd_sysfs_rts_cts_store(struct net_device *net_dev,
35 char const *buf, size_t count)
36 {
37 struct hdd_adapter *adapter = netdev_priv(net_dev);
38 char buf_local[MAX_SYSFS_USER_COMMAND_SIZE_LENGTH + 1];
39 struct hdd_context *hdd_ctx;
40 char *sptr, *token;
41 uint32_t rts_threshold;
42 QDF_STATUS status;
43 int value, ret;
44
45 if (hdd_validate_adapter(adapter))
46 return -EINVAL;
47
48 hdd_ctx = WLAN_HDD_GET_CTX(adapter);
49 ret = wlan_hdd_validate_context(hdd_ctx);
50 if (ret != 0)
51 return ret;
52
53 if (!wlan_hdd_validate_modules_state(hdd_ctx))
54 return -EINVAL;
55
56 ret = hdd_sysfs_validate_and_copy_buf(buf_local, sizeof(buf_local),
57 buf, count);
58
59 if (ret) {
60 hdd_err_rl("invalid input");
61 return ret;
62 }
63
64 sptr = buf_local;
65 token = strsep(&sptr, " ");
66 if (!token)
67 return -EINVAL;
68 if (kstrtou32(token, 0, &value))
69 return -EINVAL;
70
71 switch (value) {
72 case HDD_SYSFS_RTS_CTS_ENABLE:
73 status = ucfg_mlme_get_rts_threshold(hdd_ctx->psoc,
74 &rts_threshold);
75 if (QDF_IS_STATUS_ERROR(status)) {
76 hdd_err_rl("Get rts threshold failed, status %d",
77 status);
78 return -EINVAL;
79 }
80 break;
81 case HDD_SYSFS_RTS_CTS_DISABLE:
82 case HDD_SYSFS_CTS_ENABLE:
83 rts_threshold = cfg_max(CFG_RTS_THRESHOLD);
84 break;
85 default:
86 hdd_err_rl("invalid value %d", value);
87 return -EINVAL;
88 }
89
90 ret = wma_cli_set_command(adapter->deflink->vdev_id,
91 wmi_vdev_param_enable_rtscts,
92 value, VDEV_CMD);
93 if (ret) {
94 hdd_err_rl("Failed to set firmware, ret %d", ret);
95 return ret;
96 }
97
98 status = ucfg_mlme_set_rts_threshold(hdd_ctx->psoc, rts_threshold);
99 if (QDF_IS_STATUS_ERROR(status)) {
100 hdd_err_rl("Set rts threshold failed, status %d", status);
101 return -EINVAL;
102 }
103
104 return count;
105 }
106
107 static ssize_t
hdd_sysfs_rts_cts_store(struct device * dev,struct device_attribute * attr,char const * buf,size_t count)108 hdd_sysfs_rts_cts_store(struct device *dev,
109 struct device_attribute *attr,
110 char const *buf, size_t count)
111 {
112 struct net_device *net_dev = container_of(dev, struct net_device, dev);
113 struct osif_vdev_sync *vdev_sync;
114 ssize_t errno_size;
115
116 errno_size = osif_vdev_sync_op_start(net_dev, &vdev_sync);
117 if (errno_size)
118 return errno_size;
119
120 errno_size = __hdd_sysfs_rts_cts_store(net_dev, buf, count);
121
122 osif_vdev_sync_op_stop(vdev_sync);
123
124 return errno_size;
125 }
126
127 static DEVICE_ATTR(rts_cts, 0220,
128 NULL, hdd_sysfs_rts_cts_store);
129
hdd_sysfs_rts_cts_create(struct hdd_adapter * adapter)130 int hdd_sysfs_rts_cts_create(struct hdd_adapter *adapter)
131 {
132 int error;
133
134 error = device_create_file(&adapter->dev->dev, &dev_attr_rts_cts);
135 if (error)
136 hdd_err("could not create rts_cts sysfs file");
137
138 return error;
139 }
140
hdd_sysfs_rts_cts_destroy(struct hdd_adapter * adapter)141 void hdd_sysfs_rts_cts_destroy(struct hdd_adapter *adapter)
142 {
143 device_remove_file(&adapter->dev->dev, &dev_attr_rts_cts);
144 }
145