4f8dbdd7b917b2e59e159dc2be3b942350875f54
[firefly-linux-kernel-4.4.55.git] / drivers / net / wireless / iwmc3200wifi / netdev.c
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
50 #include "iwm.h"
51 #include "commands.h"
52 #include "cfg80211.h"
53 #include "debug.h"
54
55 static int iwm_open(struct net_device *ndev)
56 {
57         struct iwm_priv *iwm = ndev_to_iwm(ndev);
58
59         return iwm_up(iwm);
60 }
61
62 static int iwm_stop(struct net_device *ndev)
63 {
64         struct iwm_priv *iwm = ndev_to_iwm(ndev);
65
66         return iwm_down(iwm);
67 }
68
69 /*
70  * iwm AC to queue mapping
71  *
72  * AC_VO -> queue 3
73  * AC_VI -> queue 2
74  * AC_BE -> queue 1
75  * AC_BK -> queue 0
76  */
77 static const u16 iwm_1d_to_queue[8] = { 1, 0, 0, 1, 2, 2, 3, 3 };
78
79 static u16 iwm_select_queue(struct net_device *dev, struct sk_buff *skb)
80 {
81         skb->priority = cfg80211_classify8021d(skb);
82
83         return iwm_1d_to_queue[skb->priority];
84 }
85
86 static const struct net_device_ops iwm_netdev_ops = {
87         .ndo_open               = iwm_open,
88         .ndo_stop               = iwm_stop,
89         .ndo_start_xmit         = iwm_xmit_frame,
90         .ndo_select_queue       = iwm_select_queue,
91 };
92
93 void *iwm_if_alloc(int sizeof_bus, struct device *dev,
94                    struct iwm_if_ops *if_ops)
95 {
96         struct net_device *ndev;
97         struct wireless_dev *wdev;
98         struct iwm_priv *iwm;
99         int ret = 0;
100
101         wdev = iwm_wdev_alloc(sizeof_bus, dev);
102         if (IS_ERR(wdev))
103                 return wdev;
104
105         iwm = wdev_to_iwm(wdev);
106         iwm->bus_ops = if_ops;
107         iwm->wdev = wdev;
108
109         ret = iwm_priv_init(iwm);
110         if (ret) {
111                 dev_err(dev, "failed to init iwm_priv\n");
112                 goto out_wdev;
113         }
114
115         wdev->iftype = iwm_mode_to_nl80211_iftype(iwm->conf.mode);
116
117         ndev = alloc_netdev_mq(0, "wlan%d", ether_setup, IWM_TX_QUEUES);
118         if (!ndev) {
119                 dev_err(dev, "no memory for network device instance\n");
120                 goto out_priv;
121         }
122
123         ndev->netdev_ops = &iwm_netdev_ops;
124         ndev->ieee80211_ptr = wdev;
125         SET_NETDEV_DEV(ndev, wiphy_dev(wdev->wiphy));
126         wdev->netdev = ndev;
127
128         iwm->umac_profile = kmalloc(sizeof(struct iwm_umac_profile),
129                                     GFP_KERNEL);
130         if (!iwm->umac_profile) {
131                 dev_err(dev, "Couldn't alloc memory for profile\n");
132                 goto out_profile;
133         }
134
135         iwm_init_default_profile(iwm, iwm->umac_profile);
136
137         return iwm;
138
139  out_profile:
140         free_netdev(ndev);
141
142  out_priv:
143         iwm_priv_deinit(iwm);
144
145  out_wdev:
146         iwm_wdev_free(iwm);
147         return ERR_PTR(ret);
148 }
149
150 void iwm_if_free(struct iwm_priv *iwm)
151 {
152         if (!iwm_to_ndev(iwm))
153                 return;
154
155         cancel_delayed_work_sync(&iwm->ct_kill_delay);
156         free_netdev(iwm_to_ndev(iwm));
157         iwm_priv_deinit(iwm);
158         kfree(iwm->umac_profile);
159         iwm->umac_profile = NULL;
160         iwm_wdev_free(iwm);
161 }
162
163 int iwm_if_add(struct iwm_priv *iwm)
164 {
165         struct net_device *ndev = iwm_to_ndev(iwm);
166         int ret;
167
168         ret = register_netdev(ndev);
169         if (ret < 0) {
170                 dev_err(&ndev->dev, "Failed to register netdev: %d\n", ret);
171                 return ret;
172         }
173
174         return 0;
175 }
176
177 void iwm_if_remove(struct iwm_priv *iwm)
178 {
179         unregister_netdev(iwm_to_ndev(iwm));
180 }