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
 56static 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
 63static 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 */
 78static const u16 iwm_1d_to_queue[8] = { 1, 0, 0, 1, 2, 2, 3, 3 };
 79
 80int 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
 88static 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
 95static 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
102void *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
161void 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
174int 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
188void iwm_if_remove(struct iwm_priv *iwm)
189{
190	unregister_netdev(iwm_to_ndev(iwm));
191}