Merge commit 'v2.6.34-rc6' into core/locking
[pandora-kernel.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 #include <linux/slab.h>
50
51 #include "iwm.h"
52 #include "commands.h"
53 #include "cfg80211.h"
54 #include "debug.h"
55
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
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
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
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
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                 goto out_priv;
130         }
131
132         ndev->netdev_ops = &iwm_netdev_ops;
133         ndev->ieee80211_ptr = wdev;
134         SET_NETDEV_DEV(ndev, wiphy_dev(wdev->wiphy));
135         wdev->netdev = ndev;
136
137         iwm->umac_profile = kmalloc(sizeof(struct iwm_umac_profile),
138                                     GFP_KERNEL);
139         if (!iwm->umac_profile) {
140                 dev_err(dev, "Couldn't alloc memory for profile\n");
141                 goto out_profile;
142         }
143
144         iwm_init_default_profile(iwm, iwm->umac_profile);
145
146         return iwm;
147
148  out_profile:
149         free_netdev(ndev);
150
151  out_priv:
152         iwm_priv_deinit(iwm);
153
154  out_wdev:
155         iwm_wdev_free(iwm);
156         return ERR_PTR(ret);
157 }
158
159 void iwm_if_free(struct iwm_priv *iwm)
160 {
161         if (!iwm_to_ndev(iwm))
162                 return;
163
164         cancel_delayed_work_sync(&iwm->ct_kill_delay);
165         free_netdev(iwm_to_ndev(iwm));
166         iwm_priv_deinit(iwm);
167         kfree(iwm->umac_profile);
168         iwm->umac_profile = NULL;
169         iwm_wdev_free(iwm);
170 }
171
172 int iwm_if_add(struct iwm_priv *iwm)
173 {
174         struct net_device *ndev = iwm_to_ndev(iwm);
175         int ret;
176
177         ret = register_netdev(ndev);
178         if (ret < 0) {
179                 dev_err(&ndev->dev, "Failed to register netdev: %d\n", ret);
180                 return ret;
181         }
182
183         return 0;
184 }
185
186 void iwm_if_remove(struct iwm_priv *iwm)
187 {
188         unregister_netdev(iwm_to_ndev(iwm));
189 }