Zhu Yi | bb9f869 | 2009-05-21 21:20:45 +0800 | [diff] [blame] | 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 "cfg80211.h" |
| 52 | #include "debug.h" |
| 53 | |
| 54 | static int iwm_open(struct net_device *ndev) |
| 55 | { |
| 56 | struct iwm_priv *iwm = ndev_to_iwm(ndev); |
| 57 | int ret = 0; |
| 58 | |
| 59 | if (!test_bit(IWM_RADIO_RFKILL_SW, &iwm->radio)) |
| 60 | ret = iwm_up(iwm); |
| 61 | |
| 62 | return ret; |
| 63 | } |
| 64 | |
| 65 | static int iwm_stop(struct net_device *ndev) |
| 66 | { |
| 67 | struct iwm_priv *iwm = ndev_to_iwm(ndev); |
| 68 | int ret = 0; |
| 69 | |
| 70 | if (!test_bit(IWM_RADIO_RFKILL_SW, &iwm->radio)) |
| 71 | ret = iwm_down(iwm); |
| 72 | |
| 73 | return ret; |
| 74 | } |
| 75 | |
| 76 | /* |
| 77 | * iwm AC to queue mapping |
| 78 | * |
| 79 | * AC_VO -> queue 3 |
| 80 | * AC_VI -> queue 2 |
| 81 | * AC_BE -> queue 1 |
| 82 | * AC_BK -> queue 0 |
| 83 | */ |
| 84 | static const u16 iwm_1d_to_queue[8] = { 1, 0, 0, 1, 2, 2, 3, 3 }; |
| 85 | |
| 86 | static u16 iwm_select_queue(struct net_device *dev, struct sk_buff *skb) |
| 87 | { |
| 88 | skb->priority = cfg80211_classify8021d(skb); |
| 89 | |
| 90 | return iwm_1d_to_queue[skb->priority]; |
| 91 | } |
| 92 | |
| 93 | static const struct net_device_ops iwm_netdev_ops = { |
| 94 | .ndo_open = iwm_open, |
| 95 | .ndo_stop = iwm_stop, |
| 96 | .ndo_start_xmit = iwm_xmit_frame, |
| 97 | .ndo_select_queue = iwm_select_queue, |
| 98 | }; |
| 99 | |
| 100 | void *iwm_if_alloc(int sizeof_bus, struct device *dev, |
| 101 | struct iwm_if_ops *if_ops) |
| 102 | { |
| 103 | struct net_device *ndev; |
| 104 | struct wireless_dev *wdev; |
| 105 | struct iwm_priv *iwm; |
| 106 | int ret = 0; |
| 107 | |
| 108 | wdev = iwm_wdev_alloc(sizeof_bus, dev); |
| 109 | if (!wdev) { |
| 110 | dev_err(dev, "no memory for wireless device instance\n"); |
| 111 | return ERR_PTR(-ENOMEM); |
| 112 | } |
| 113 | |
| 114 | iwm = wdev_to_iwm(wdev); |
| 115 | iwm->bus_ops = if_ops; |
| 116 | iwm->wdev = wdev; |
| 117 | iwm_priv_init(iwm); |
| 118 | wdev->iftype = iwm_mode_to_nl80211_iftype(iwm->conf.mode); |
| 119 | |
| 120 | ndev = alloc_netdev_mq(0, "wlan%d", ether_setup, |
| 121 | IWM_TX_QUEUES); |
| 122 | if (!ndev) { |
| 123 | dev_err(dev, "no memory for network device instance\n"); |
| 124 | goto out_wdev; |
| 125 | } |
| 126 | |
| 127 | ndev->netdev_ops = &iwm_netdev_ops; |
| 128 | ndev->wireless_handlers = &iwm_iw_handler_def; |
| 129 | ndev->ieee80211_ptr = wdev; |
| 130 | SET_NETDEV_DEV(ndev, wiphy_dev(wdev->wiphy)); |
| 131 | ret = register_netdev(ndev); |
| 132 | if (ret < 0) { |
| 133 | dev_err(dev, "Failed to register netdev: %d\n", ret); |
| 134 | goto out_ndev; |
| 135 | } |
| 136 | |
| 137 | wdev->netdev = ndev; |
| 138 | |
Zhu Yi | bb9f869 | 2009-05-21 21:20:45 +0800 | [diff] [blame] | 139 | return iwm; |
| 140 | |
Zhu Yi | bb9f869 | 2009-05-21 21:20:45 +0800 | [diff] [blame] | 141 | out_ndev: |
| 142 | free_netdev(ndev); |
| 143 | |
| 144 | out_wdev: |
| 145 | iwm_wdev_free(iwm); |
| 146 | return ERR_PTR(ret); |
| 147 | } |
| 148 | |
| 149 | void iwm_if_free(struct iwm_priv *iwm) |
| 150 | { |
| 151 | int i; |
| 152 | |
| 153 | if (!iwm_to_ndev(iwm)) |
| 154 | return; |
| 155 | |
Zhu Yi | bb9f869 | 2009-05-21 21:20:45 +0800 | [diff] [blame] | 156 | unregister_netdev(iwm_to_ndev(iwm)); |
| 157 | free_netdev(iwm_to_ndev(iwm)); |
| 158 | iwm_wdev_free(iwm); |
| 159 | destroy_workqueue(iwm->rx_wq); |
| 160 | for (i = 0; i < IWM_TX_QUEUES; i++) |
| 161 | destroy_workqueue(iwm->txq[i].wq); |
| 162 | } |