1 /* 2 * Copyright (c) 2012-2015 Qualcomm Atheros, Inc. 3 * 4 * Permission to use, copy, modify, and/or distribute this software for any 5 * purpose with or without fee is hereby granted, provided that the above 6 * copyright notice and this permission notice appear in all copies. 7 * 8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 15 */ 16 17 #include <linux/etherdevice.h> 18 #include "wil6210.h" 19 #include "txrx.h" 20 21 static int wil_open(struct net_device *ndev) 22 { 23 struct wil6210_priv *wil = ndev_to_wil(ndev); 24 25 wil_dbg_misc(wil, "%s()\n", __func__); 26 27 if (debug_fw) { 28 wil_err(wil, "%s() while in debug_fw mode\n", __func__); 29 return -EINVAL; 30 } 31 32 return wil_up(wil); 33 } 34 35 static int wil_stop(struct net_device *ndev) 36 { 37 struct wil6210_priv *wil = ndev_to_wil(ndev); 38 39 wil_dbg_misc(wil, "%s()\n", __func__); 40 41 return wil_down(wil); 42 } 43 44 static int wil_change_mtu(struct net_device *ndev, int new_mtu) 45 { 46 struct wil6210_priv *wil = ndev_to_wil(ndev); 47 48 if (new_mtu < 68 || new_mtu > mtu_max) { 49 wil_err(wil, "invalid MTU %d\n", new_mtu); 50 return -EINVAL; 51 } 52 53 wil_dbg_misc(wil, "change MTU %d -> %d\n", ndev->mtu, new_mtu); 54 ndev->mtu = new_mtu; 55 56 return 0; 57 } 58 59 static int wil_do_ioctl(struct net_device *ndev, struct ifreq *ifr, int cmd) 60 { 61 struct wil6210_priv *wil = ndev_to_wil(ndev); 62 63 int ret = wil_ioctl(wil, ifr->ifr_data, cmd); 64 65 wil_dbg_misc(wil, "ioctl(0x%04x) -> %d\n", cmd, ret); 66 67 return ret; 68 } 69 70 static const struct net_device_ops wil_netdev_ops = { 71 .ndo_open = wil_open, 72 .ndo_stop = wil_stop, 73 .ndo_start_xmit = wil_start_xmit, 74 .ndo_set_mac_address = eth_mac_addr, 75 .ndo_validate_addr = eth_validate_addr, 76 .ndo_change_mtu = wil_change_mtu, 77 .ndo_do_ioctl = wil_do_ioctl, 78 }; 79 80 static int wil6210_netdev_poll_rx(struct napi_struct *napi, int budget) 81 { 82 struct wil6210_priv *wil = container_of(napi, struct wil6210_priv, 83 napi_rx); 84 int quota = budget; 85 int done; 86 87 wil_rx_handle(wil, "a); 88 done = budget - quota; 89 90 if (done < budget) { 91 napi_complete(napi); 92 wil6210_unmask_irq_rx(wil); 93 wil_dbg_txrx(wil, "NAPI RX complete\n"); 94 } 95 96 wil_dbg_txrx(wil, "NAPI RX poll(%d) done %d\n", budget, done); 97 98 return done; 99 } 100 101 static int wil6210_netdev_poll_tx(struct napi_struct *napi, int budget) 102 { 103 struct wil6210_priv *wil = container_of(napi, struct wil6210_priv, 104 napi_tx); 105 int tx_done = 0; 106 uint i; 107 108 /* always process ALL Tx complete, regardless budget - it is fast */ 109 for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) { 110 struct vring *vring = &wil->vring_tx[i]; 111 112 if (!vring->va) 113 continue; 114 115 tx_done += wil_tx_complete(wil, i); 116 } 117 118 if (tx_done < budget) { 119 napi_complete(napi); 120 wil6210_unmask_irq_tx(wil); 121 wil_dbg_txrx(wil, "NAPI TX complete\n"); 122 } 123 124 wil_dbg_txrx(wil, "NAPI TX poll(%d) done %d\n", budget, tx_done); 125 126 return min(tx_done, budget); 127 } 128 129 static void wil_dev_setup(struct net_device *dev) 130 { 131 ether_setup(dev); 132 dev->tx_queue_len = WIL_TX_Q_LEN_DEFAULT; 133 } 134 135 void *wil_if_alloc(struct device *dev) 136 { 137 struct net_device *ndev; 138 struct wireless_dev *wdev; 139 struct wil6210_priv *wil; 140 struct ieee80211_channel *ch; 141 int rc = 0; 142 143 wdev = wil_cfg80211_init(dev); 144 if (IS_ERR(wdev)) { 145 dev_err(dev, "wil_cfg80211_init failed\n"); 146 return wdev; 147 } 148 149 wil = wdev_to_wil(wdev); 150 wil->wdev = wdev; 151 152 wil_dbg_misc(wil, "%s()\n", __func__); 153 154 rc = wil_priv_init(wil); 155 if (rc) { 156 dev_err(dev, "wil_priv_init failed\n"); 157 goto out_wdev; 158 } 159 160 wdev->iftype = NL80211_IFTYPE_STATION; /* TODO */ 161 /* default monitor channel */ 162 ch = wdev->wiphy->bands[IEEE80211_BAND_60GHZ]->channels; 163 cfg80211_chandef_create(&wdev->preset_chandef, ch, NL80211_CHAN_NO_HT); 164 165 ndev = alloc_netdev(0, "wlan%d", NET_NAME_UNKNOWN, wil_dev_setup); 166 if (!ndev) { 167 dev_err(dev, "alloc_netdev_mqs failed\n"); 168 rc = -ENOMEM; 169 goto out_priv; 170 } 171 172 ndev->netdev_ops = &wil_netdev_ops; 173 wil_set_ethtoolops(ndev); 174 ndev->ieee80211_ptr = wdev; 175 ndev->hw_features = NETIF_F_HW_CSUM | NETIF_F_RXCSUM | 176 NETIF_F_SG | NETIF_F_GRO | 177 NETIF_F_TSO | NETIF_F_TSO6 | 178 NETIF_F_RXHASH; 179 180 ndev->features |= ndev->hw_features; 181 SET_NETDEV_DEV(ndev, wiphy_dev(wdev->wiphy)); 182 wdev->netdev = ndev; 183 184 netif_napi_add(ndev, &wil->napi_rx, wil6210_netdev_poll_rx, 185 WIL6210_NAPI_BUDGET); 186 netif_napi_add(ndev, &wil->napi_tx, wil6210_netdev_poll_tx, 187 WIL6210_NAPI_BUDGET); 188 189 netif_tx_stop_all_queues(ndev); 190 191 return wil; 192 193 out_priv: 194 wil_priv_deinit(wil); 195 196 out_wdev: 197 wil_wdev_free(wil); 198 199 return ERR_PTR(rc); 200 } 201 202 void wil_if_free(struct wil6210_priv *wil) 203 { 204 struct net_device *ndev = wil_to_ndev(wil); 205 206 wil_dbg_misc(wil, "%s()\n", __func__); 207 208 if (!ndev) 209 return; 210 211 wil_priv_deinit(wil); 212 213 wil_to_ndev(wil) = NULL; 214 free_netdev(ndev); 215 216 wil_wdev_free(wil); 217 } 218 219 int wil_if_add(struct wil6210_priv *wil) 220 { 221 struct net_device *ndev = wil_to_ndev(wil); 222 int rc; 223 224 wil_dbg_misc(wil, "%s()\n", __func__); 225 226 rc = register_netdev(ndev); 227 if (rc < 0) { 228 dev_err(&ndev->dev, "Failed to register netdev: %d\n", rc); 229 return rc; 230 } 231 232 return 0; 233 } 234 235 void wil_if_remove(struct wil6210_priv *wil) 236 { 237 struct net_device *ndev = wil_to_ndev(wil); 238 239 wil_dbg_misc(wil, "%s()\n", __func__); 240 241 unregister_netdev(ndev); 242 } 243