1 /*
2 * Intel Wireless Multicomm 3200 WiFi driver
3 *
4 * Copyright (C) 2009 Intel Corporation <ilw@linux.intel.com>
5 * Samuel Ortiz <samuel.ortiz@intel.com>
6 * Zhu Yi <yi.zhu@intel.com>
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License version
10 * 2 as published by the Free Software Foundation.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
20 * 02110-1301, USA.
21 *
22 */
23
24 /*
25 * This is the netdev related hooks for iwm.
26 *
27 * Some interesting code paths:
28 *
29 * iwm_open() (Called at netdev interface bringup time)
30 * -> iwm_up() (main.c)
31 * -> iwm_bus_enable()
32 * -> if_sdio_enable() (In case of an SDIO bus)
33 * -> sdio_enable_func()
34 * -> iwm_notif_wait(BARKER_REBOOT) (wait for reboot barker)
35 * -> iwm_notif_wait(ACK_BARKER) (wait for ACK barker)
36 * -> iwm_load_fw() (fw.c)
37 * -> iwm_load_umac()
38 * -> iwm_load_lmac() (Calibration LMAC)
39 * -> iwm_load_lmac() (Operational LMAC)
40 * -> iwm_send_umac_config()
41 *
42 * iwm_stop() (Called at netdev interface bringdown time)
43 * -> iwm_down()
44 * -> iwm_bus_disable()
45 * -> if_sdio_disable() (In case of an SDIO bus)
46 * -> sdio_disable_func()
47 */
48 #include <linux/netdevice.h>
49 #include <linux/slab.h>
50
51 #include "iwm.h"
52 #include "commands.h"
53 #include "cfg80211.h"
54 #include "debug.h"
55
iwm_open(struct net_device * ndev)56 static int iwm_open(struct net_device *ndev)
57 {
58 struct iwm_priv *iwm = ndev_to_iwm(ndev);
59
60 return iwm_up(iwm);
61 }
62
iwm_stop(struct net_device * ndev)63 static int iwm_stop(struct net_device *ndev)
64 {
65 struct iwm_priv *iwm = ndev_to_iwm(ndev);
66
67 return iwm_down(iwm);
68 }
69
70 /*
71 * iwm AC to queue mapping
72 *
73 * AC_VO -> queue 3
74 * AC_VI -> queue 2
75 * AC_BE -> queue 1
76 * AC_BK -> queue 0
77 */
78 static const u16 iwm_1d_to_queue[8] = { 1, 0, 0, 1, 2, 2, 3, 3 };
79
iwm_tid_to_queue(u16 tid)80 int iwm_tid_to_queue(u16 tid)
81 {
82 if (tid > IWM_UMAC_TID_NR - 2)
83 return -EINVAL;
84
85 return iwm_1d_to_queue[tid];
86 }
87
iwm_select_queue(struct net_device * dev,struct sk_buff * skb)88 static u16 iwm_select_queue(struct net_device *dev, struct sk_buff *skb)
89 {
90 skb->priority = cfg80211_classify8021d(skb);
91
92 return iwm_1d_to_queue[skb->priority];
93 }
94
95 static const struct net_device_ops iwm_netdev_ops = {
96 .ndo_open = iwm_open,
97 .ndo_stop = iwm_stop,
98 .ndo_start_xmit = iwm_xmit_frame,
99 .ndo_select_queue = iwm_select_queue,
100 };
101
iwm_if_alloc(int sizeof_bus,struct device * dev,struct iwm_if_ops * if_ops)102 void *iwm_if_alloc(int sizeof_bus, struct device *dev,
103 struct iwm_if_ops *if_ops)
104 {
105 struct net_device *ndev;
106 struct wireless_dev *wdev;
107 struct iwm_priv *iwm;
108 int ret = 0;
109
110 wdev = iwm_wdev_alloc(sizeof_bus, dev);
111 if (IS_ERR(wdev))
112 return wdev;
113
114 iwm = wdev_to_iwm(wdev);
115 iwm->bus_ops = if_ops;
116 iwm->wdev = wdev;
117
118 ret = iwm_priv_init(iwm);
119 if (ret) {
120 dev_err(dev, "failed to init iwm_priv\n");
121 goto out_wdev;
122 }
123
124 wdev->iftype = iwm_mode_to_nl80211_iftype(iwm->conf.mode);
125
126 ndev = alloc_netdev_mq(0, "wlan%d", ether_setup, IWM_TX_QUEUES);
127 if (!ndev) {
128 dev_err(dev, "no memory for network device instance\n");
129 ret = -ENOMEM;
130 goto out_priv;
131 }
132
133 ndev->netdev_ops = &iwm_netdev_ops;
134 ndev->ieee80211_ptr = wdev;
135 SET_NETDEV_DEV(ndev, wiphy_dev(wdev->wiphy));
136 wdev->netdev = ndev;
137
138 iwm->umac_profile = kmalloc(sizeof(struct iwm_umac_profile),
139 GFP_KERNEL);
140 if (!iwm->umac_profile) {
141 dev_err(dev, "Couldn't alloc memory for profile\n");
142 ret = -ENOMEM;
143 goto out_profile;
144 }
145
146 iwm_init_default_profile(iwm, iwm->umac_profile);
147
148 return iwm;
149
150 out_profile:
151 free_netdev(ndev);
152
153 out_priv:
154 iwm_priv_deinit(iwm);
155
156 out_wdev:
157 iwm_wdev_free(iwm);
158 return ERR_PTR(ret);
159 }
160
iwm_if_free(struct iwm_priv * iwm)161 void iwm_if_free(struct iwm_priv *iwm)
162 {
163 if (!iwm_to_ndev(iwm))
164 return;
165
166 cancel_delayed_work_sync(&iwm->ct_kill_delay);
167 free_netdev(iwm_to_ndev(iwm));
168 iwm_priv_deinit(iwm);
169 kfree(iwm->umac_profile);
170 iwm->umac_profile = NULL;
171 iwm_wdev_free(iwm);
172 }
173
iwm_if_add(struct iwm_priv * iwm)174 int iwm_if_add(struct iwm_priv *iwm)
175 {
176 struct net_device *ndev = iwm_to_ndev(iwm);
177 int ret;
178
179 ret = register_netdev(ndev);
180 if (ret < 0) {
181 dev_err(&ndev->dev, "Failed to register netdev: %d\n", ret);
182 return ret;
183 }
184
185 return 0;
186 }
187
iwm_if_remove(struct iwm_priv * iwm)188 void iwm_if_remove(struct iwm_priv *iwm)
189 {
190 unregister_netdev(iwm_to_ndev(iwm));
191 }
192